How to Recondition a Battery

EZ Battery Reconditioning Method

This eBook guide gives you all the information that you need to know to never have to buy batteries again. You will learn what it takes to recondition your batteries that you already have, with things that already have at your house or can easily get. You can save money by never having to buy batteries again But it gets better! You can make huge profits off of selling the batteries that you reconditioned at premium prices. You don't have to have any technical know-how to learn how to do this All it takes is the information in this book! No matter what kind of batteries they are Even if they are car batteries, normal AA batteries, or forklift batteries, you can recondition them like new and sell them at full price or reuse them for yourself! More here...

EZ Battery Reconditioning Method Overview

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Battery Voltage Measurement

The battery voltage is measured using RFI2, N450 A D converter channel 0 and 7. The converter value supplied from channel 7 is measured when the transmitter is active. This measurement gives the minimum battery voltage. The value from channel 0 is measured when the transmitter is inactive. The battery voltage supplied to the A D converter input is switched off when the baseband is in power off. The battery voltage measurement voltage is supplied by PSCLD, N301 which performs scaling, the scaling factor is R1(R1+R2), and switch off. The measurement voltage is filtered by a capacitor to achieve an average value that is not depending upon the current consumption behavior of the baseband. To be able to measure the battery voltage during transmission pulse the time constant must be short. The value for the filtering capacitor is set to 1 nF, C319. The scaling factor used to scale the battery voltage must be 1 3, which means that 9V battery voltage will give 3V A D converter input voltage....

Power off when battery voltage low

During normal discharge the phone indicates the user that the battery will drain after some time. If not recharged, SW detects that battery voltage is too low and shuts the phone off through a normal power down procedure. Anyway, if the SW fails to power down the phone, CCONT will make a reset and power down the phone if the battery voltage drops below 2.8 V.

Prolong battery life

Many features in your device increase the demand on battery power and reduce the battery lifetime. To save battery power, note the following Features that use Bluetooth technology, or allowing such features to run in the background while using other features, increase the demand on battery power. Turn Bluetooth technology off when you do not need it. Features that use wireless LAN (WLAN), or allowing such features to run in the background while using other features, increase the demand on battery power. WLAN on your Nokia device switches off when you are not trying to connect, not connected to an access point, or not scanning for available networks. To further reduce battery consumption, you can specify that your device does not scan, or scans less often, for available networks in the background. The Maps application downloads new map information when you move to new areas on the map, which increases the demand on battery power. You can prevent the automatic download of new maps. If...

Battery Charging

Nokia3310 Battery Connector Pin Details

When a charger is connected, the CHAPS is supplying a startup current minimum of 130mA to the phone. The startup current provides initial charging to a phone with an empty battery. Startup circuit charges the battery until the battery voltage level reaches 3.0V (+ - 0.1V) and the CCONT releases the PURX reset signal and program execution starts. Charging mode is changed from startup charging to PWM charging that is controlled by the MCU software. If the battery voltage reaches 3.55V (3.75V maximum) before the program has taken control over the charging, the startup current is switched off. The startup current is switched on again when the battery voltage has dropped 100mV (nominal). The CHAPS includes an over-voltage protection circuit (input pin VBAT), which purpose is to protect the phone from damage caused by too high Battery voltage. Different cutoffvoltages (VLIM1 orVLIM2) for two different battery types (Li or Ni) are selected by the MAD via CHAPS-input pin LIM according to the...

External IO and ADconverters

This block is used to measure specified voltages. It also controls the mobile antenna motor (AMC) and the car radio mute (CMR). Specified voltages are car battery voltage +VB, ignition sense voltage (IGNS) and phone charging voltage +VC. For CRM and AMC current are also controlled by this block.

Power Levels TXC vs Temperature

For saving battery capacity and because of insufficient linearity in digital mode, output power is decreased from level 2 to level 2.5, when battery voltage drops below 3.3V. (tbd.). The power reduction is done linearly as a function of battery voltage. Vcc 3.3V 3.1V -> PL2 PL2.5.

Charger Voltage Measurement

The battery size, capacity is determined by measuring the voltage on the BSI pin on the battery pack when the battery is attached to the phone. The MCU A D converter channel 3 is used for this purpose. The BSI signal is pulled up on the base band using a 47 kohm resistor and the resistor inside the battery pack is reflecting the capacity of the battery. There are two special cases to be detected by the MCU. The first case is the Lithium battery. The Lithium battery has reserved values in the battery size table. Lithium type batteries are all the same from charging point of view. Lithium batteries are charged to a constant voltage and charging is aborted when the predefined voltage is reached. The Lithium battery capacity is a function of the battery voltage. The battery voltage drops linearly as the battery is discharged. The other case that has to be handled is the dummy battery. This battery is used for A D converter field calibration at service centers and together with a defined...

Power Distribution Control and Reset

All power (except backup battery power) is drawn from BL5-C Li-Ion battery located in the B cover. Current flows through ZOCUS current sense resister which is used for current measurement by ZOCUS and thus for remaining operating time estimation. During system start-up, in RESET state, the regulators are enabled, and each regulator charges the capacitor(s) at the output with the maximum current (short circuit current) it can deliver. This results in battery voltage dropping during start-up. When a battery with voltage level just above the hardware cutoff limit is inserted, the system may not start due to excessive voltage dipping. Dropping below 2.8 V for longer than 5 us forces the system to PWR_0FF state. Controlled powering off is done when the user requests it by pressing the power-key or when the battery voltage falls too low. Uncontrolled powering off happens when the battery is suddenly removed or if over-temperature condition is detected in regulator block while in RESET mode....

Baseband AD Converter Channels usage in N and D

The auxiliary A D converter channels inside RFI2, N450 are used by MCU to measure battery voltage. The A D converters are accessed by the DSP, D152 via the ASIC, D151. The required resolution is 10 bit. Chan 0 Battery voltage Chan 0 Battery voltage Battery voltage Battery voltage when TX is active

LCD Keypad Illumination

Current through leds is controlled by transistor circuitry. External transistor driver circuitry is used as constant current source in order to prevent any change in battery voltage be seen as changing led brightness. Battery voltage is changing for example during charging depending on a charger, battery type and age.

External Accessory Regulator

An external LDO Regulator exists for accessory power supply purposes. All ACI-accesso-ries require this power supply. Regulator input is connected to battery voltage VBAT and output is connected to Vout pin in the system connector. Regulator is controlled via UPP (On Off-function).

Baseband functional description

Battery voltage (idle) Battery voltage maximum value is specified during charging is active Battery voltage (Call) Battery voltage maximum value is specified during charging is active (Dead) mode means that the main battery is not present or its voltage is too low (below EM ASIC N2200 master reset threshold) and that the back-up battery voltage is too low. The main battery is not present or its voltage is too low, but back-up battery voltage is adequate and the 32kHz oscillator is running (RTC is on).

Power up with a charger

When the charger is connected, CCONT will switch on the CCONT digital voltage as soon as the battery voltage exceeds 3.0V. The reset for CCONT's digital parts is released when the operating voltage is stabilized (50 us from switching on the voltages). Operating voltage forVCXO is also switched on. The counter in CCONT digital section will keep MAD2WD1 in reset for 62 ms (PURX) to make sure that the clock provided by VCXO is stable. After this delay, MAD2WD1 reset is released, and VCXO -control (SLEEPX) is given to MAD. The next diagram explains the power on procedure with charger (the picture assumes empty battery, but the situation would be the same with full battery) 1 Battery voltage over 3.0 > Digital voltages to CCONT 2 CCONT digital reset released. VCXO turned on 3 62ms delay before PURX When the phone is powered up with an empty battery pack using the standard charger, the charger may not supply enough current for standard power-up procedure and the power-up is delayed.

Keyboard and Display Light

The display and keyboard are illuminated by LED's. The light is normally switched on when a keypad is pressed. The rules for light switching are defined in the SW UI specifications. The display and keyboard lights are controlled by the MCU. The LED's are connected two in series to reduce the power consumption. Due to the amount of LED's required for the keyboard and display light they are divided into two groups. Each group has it's own control transistor. The LED switch transistor is connected as a constant current source, which means that the current limiting resistor is put in the emitter circuitry. This arrangement will reduce LED flickering depending upon battery voltage and momentary power consumption of the phone. The LED's are connected straight to the battery voltage. This connection allows two LED's to connected in series. The battery voltage varies a lot depending upon if the battery is charged, full or empty. The switching transistor circuitry is designed to improve this...

Power key and system powerup

When the battery is placed in the phone the power key circuits are energized. When the power key is pressed, the system boots up (if an adequate battery voltage is present). (dead) mode means that the main battery is not present or its voltage is too low (below N2200 AVILMA master reset threshold) and that the back-up battery voltage is too low. The main battery is not present or its voltage is too low but back-up battery voltage is adequate and the 32 kHz oscillator is running (RTC is on).

Power Up and Power Down

Intelligent battery packs have a possibility to power up the phone. When the battery gives a short (10ms) voltage pulse through the BTEMP pin, the CCONT wakes up and starts the power on procedure. When the charger is connected CCONT will switch on the CCONT digital voltage as soon as the battery voltage exceeds 3.0V. The reset for 1 Battery voltage over 3.0 > Digital voltages to CCONT (VBB) 2 CCONT digital reset released. VCXO turned on 3 62ms delay before PURX released 1 Battery voltage over 3.0 > Digital voltages to CCONT (VBB) 2 CCONT digital reset released. VCXO turned on 3 62ms delay before PURX released When the phone is powered up with an empty battery pack using the standard charger, the charger may not supply enough current for standard powerup procedure and the powerup must be delayed.

Powerup sequence Reset mode

During system start-up, in RESET state, the regulators are enabled, and each regulator charges the capacitor(s) at the output with the maximum current (short circuit current) it can deliver. This results in battery voltage dropping during the start-up. When a battery with voltage level just above the hardware cutoff limit is inserted, the system may not start due to excessive voltage dipping. Dropping below 2.8 V for longer than 5 us forces the system to PWR_OFF state.

Backup battery troubleshooting

Then connect the main battery and switch the phone ON. Monitor the voltage of the backup battery in order to verify that the voltage will rise. After a few minutes switch the phone off and disconnect the main battery and measure that the backup battery is charged. Typical behaviour of the backup battery voltage during charge and discharge is described in the following pictures as a function of time.

Charger Initiated Power Up Procedure

1.1 The PSCC starts charging the battery with initial current. When the battery voltage reaches the switcher startup voltage level, the switcher will start up and supply the CCONT 1, which identifies the charger presence (vCHAr) In the end of the power up procedure initialized by adding the charger the phone goes to POWER ON ACTING DEAD state. In this state the only indication to the user are the battery charging alert and the scrolling battery mark in the display. In POWER ON ACTING DEAD state no actions against GSM network are done, the phone remains unknown to the network.

Technical Information

- HD947 uses a two cell semi fixed NiMH battery-pack only, giving 2.4V nominal supply voltage. Thus the usual NMP battery interface is modified. - The supply voltage inside the phone is delivered by a DC DC converter, which step up the battery voltage to 3.1 - 4.2 V supplying the regulators and PA's of the phone.

Bluetooth and Fm Rds radio module

The device has two clock signals SYS_CLK (19.2MHz, 26.0MHz, or 38.4MHz supported) and SLEEP_CLK (32.768kHz). The SLEEP_CLK is supplied all the time the phone is switched on. To maximise the phone standby time, it is only necessary to provide a SYS_CLK signal when Bluetooth activity occurs, such as sending Bluetooth data to another device, or checking periodically if there are any other Bluetooth devices attempting to communicate with it. At other times when the Bluetooth device is in standby mode or the FM radio is switched on it is only necessary to provide a SLEEP_CLK signal. The Bluetooth-FM ASIC is powered directly from the phone battery voltage line (VBAT). An internal regulator is enabled when Bluetooth or FM radio is switched on.

Charging Control Switch Functional Description

When the PWM output from N300 is active the feedback voltage is changed due to the presence of R308 and R309. When the PWM is active the charging switch regulator voltage is set to 10.5V maximum. This means that even if the voltage on the charger input exceeds 11.5V the battery voltage will not exceed 10.5 V. This protects N300 from over voltage even if the battery was to be detached while charging. V305 is a schottky diode that prevents the battery voltage from reverse bias V304 when the charger is not connected. The leakage current for V305 is increasing with increasing temperature and the leakage current is passed to ground via R308, V311 and R304. This arrangement prevents V304 from being reversed biased as the leakage current increases at high temperatures.

Battery Temperatur Measurement

The battery temperature is measured during charging. The BTEMP pin to the battery is pulled up on baseband by a 47 kohm resistor to logic supply voltage, 3.2V. The voltage on the BTEMP pin is a function of the battery pack temperature. Auxiliary A D channel 3 is used for this purpose. Inside the battery pack there is a 47 kohm NTC resistor to ground. The A D converter value can be calculated from the following formula where RNTC is the value of the NTC resistor inside the battery pack.

Battery Identification

Different battery types are identified by a pulldown resistor inside the battery pack. The BSI line inside transceiver has a 100k pullup to VBB. The MCU can identify the battery by reading the BSI line DC-voltage level with a CCONT (N100) A D-converter. The battery identification line is used also for battery removal detection. The BSI line is connected to a SIMCardDetX line of MAD2 (D200). SIMCardDetX is a threshold detector with a nominal input switching level 0.85xVcc for a rising edge and 0.55xVcc for a falling edge. The battery removal detection is used as a trigger to power down the SIM card before the power is lost. The BSI contact in the battery pack is made 0.7mm shorter than the supply voltage contacts so that there is a delay between battery removal detection and supply power off,

Battery temperature BTEMP

The battery temperature is measured with a NTC inside the battery pack. The BTEMP line inside transceiver has a 100k pull-up to VREF. The MCU calculates the battery temperature by reading the BTEMP line DC-voltage level with a CCONT (N201) A D-converter. Battery temperature indication 100k pull-up resistor to VREF in phone Battery package has NTC pull down resistor 47kQ. + -5 +25 C , B 4050+ -3

Pscld N External Components

N300 requires capacitors on the input power supply as well as on the output from each regulator to keep each regulator stable during different load and temperature conditions. C305 and C308 are the input filtering capacitors. Due to EMC precautions a filter using C305, L300 and C308 has been inserted into the supply rail. This filter reduces the high frequency components present at the battery supply from exiting the baseband into the battery pack. The regulator outputs also have filter capacitors for power supply filtering and regulator stability. A set of different capacitors are used to achieve a high bandwith in the suppression filter.

Bluetooth connectivity About Bluetooth connectivity

This device is compliant with Bluetooth Specification 2.0 + EDR supporting the following profiles advanced audio distribution, basic imaging, device identification, dial-up networking, file transfer, generic access, generic audio video distribution, generic object exchange, hands-free, headset, object push, phone book access, serial port, and SIM access. To ensure interoperability between other devices supporting Bluetooth technology, use Nokia approved accessories for this model. Check with the manufacturers of other devices to determine their compatibility with this device. Features using Bluetooth technology increase the demand on battery power and reduce the battery life.

Charging and discharging

Your device is powered by a rechargeable battery. The battery can be charged and discharged hundreds of times, but it will eventually wear out. When the talk and standby times are noticeably shorter than normal, replace the battery. Use only Nokia approved batteries, and recharge your battery only with Nokia approved chargers designated for this device. If a replacement battery is being used for the first time or if the battery has not been used for a prolonged period, it may be necessary to connect the charger, then disconnect and reconnect it to begin charging the battery.

Battery and charger information

Your device is powered by a rechargeable battery. The battery intended for use with this device is BL-5J. Nokia may make additional battery models available for this device. This device is intended for use when supplied with power from the following chargers AC-8, AC-5. The exact charger model number may vary depending on the type of plug. The plug variant is identified by one of the following E, EB, X, AR, U, A, C, or UB.

Product and safety information

Your device is powered by a rechargeable battery. The battery intended for use with this device is BL-5CT. Nokia may make additional battery models available for this device. This device is intended for use when supplied with power from the following chargers AC-8 AC-15. The exact charger model number may vary depending on the type of plug. The plug variant is identified by one of the following E, EB, X, AR, U, A, C, K, or UB.

Battery information

Note A new battery's full performance is achieved only after two or three complete charge and discharge cycles The battery can be charged and discharged hundreds of times but it will eventually wear out. When the operating time (talk-time and standby time) is noticeably shorter than normal, it is time to buy a new battery.

Product and Accessory List

BLB-2 Standard Battery Li-ion 750 mAh ACP-7E Standard Charger (EUR) 207-253 Vac ACP-7U Standard Charger (US) 108-132 Vac ACP-7C Standard Charger (US) 198-242 Vac ACP-7X Standard Charger (UK) 207-253 Vac ACP-7H Standard Charger (UK) 180-220 Vac ACP-7A Standard Charger (AUS) 216-264 Vac ACP-8E Travel Charger (EUR) 90-264 Vac ACP-8K Travel Charger (Korea) 90-264 Vac ACP-8X Travel Charger (UK) 90-264 Vac ACP-8U Travel Charger (US) 90-264 Vac ACP-8C Travel Charger (China) 90-264 Vac ACP-8A Travel Charger (Australia) 90-264 Vac LCH-9 Mobile Charger DDC-1 Battery Charging Stand HDC-5 Headset (with remote button) HDE-2 Headset (without remote button) HDD-1 Dual Headset HDB-5 Boom Headset HDR-1 Music Player LPS-3 Loopset (inductive) CSE-30 Carrying Strap

External signals and Connections

Nokia 3510i Series Connector Pins

- System connector for accessories and intelligent battery packs. The electrical specifications in the table below shows the bottom connector signals and levels in the baseband. The system connector is used to connect the transceiver to accessories. System connector pins can also be used to connect intelligent battery packs to the transceiver. The table gives the idle voltage produced by the acceptable chargers at the DC connector input. The absolute maximum input voltage is 30 V due to the transient suppressor that is protecting the charger input. Battery voltage Maximum voltage in call state with charger Maximum voltage in idle state with charger Battery temperature indication Phone has a 100k (+-5 ) pullup resistor, Battery package has a NTC pulldown resistor

Nhm-8nx 3510 How To Reset

3 Supply battery voltage to the battery pin After receiving one of the above signals, the UEM counts a 20ms delay and then enters it's reset mode. The watchdog starts up, and if the battery voltage is greater than Vcoff+ a 200ms delay is started to allow references etc. to settle. After this delay elapses the VFLASH1 regulator is enabled. 500us later VR3, VANA, VIO and VCORE are enabled. Finally the PURX line is held low for 20 ms. This reset, PURX, is fed to the baseband ASIC UPP, resets are generated for the DSP and the MCU. During this reset phase the UEM forces the VCXO regulator on regardless of the status of the sleep control input signal to the UEM. All baseband regulators are switched on at the UEM power on except for the SIM regulator that is controlled by the MCU. The UEM internal watchdog is running during the UEM reset state, with the longest watchdog time selected. If the watchdog expires the UEM returns to power off state. The UEM watchdog is internally acknowledged at...

Digital Control MADPR

The MAD2PR1 operates from a 13 MHz system clock, which is generated from the 13Mhz VCXO frequency. The MAD2PR1 supplies a 6,5MHz or a 13MHz internal clock for the MCU and system logic blocks and a 13MHz clock for the DSP, where it is multiplied to TBD MHz DSP clock. The system clock can be stopped for a system sleep mode by disabling the VCXO supply power from the CCONT regulator output. The CCONT provides a 32kHz sleep clock for internal use and to the MAD2PR1, which is used for the sleep mode timing. The sleep clock is active when there is a battery voltage available i.e. always when the battery is connected.

Power Control and Reset

Power supply components - CCONT, VBB, Vcore, VACC and VMMC regulators - and the audio amplifier are powered with main battery voltage. Main battery voltage is also fed to RF part for RF power amplifier (PA) and to the UI module for backlight and LCD supply. RAE-5 electronics is powered off only if the main battery voltage drops below the power off SW limit. This happens when the main battery discharges or is removed. When battery voltage drops below SW limit, CCONT is powered down by letting CCONT's watch dog to go off. Charging of main battery can be started in any operating mode. The battery type and capacity are identified by MADLinda by measuring a pull-down resistor connected to BSI contact inside the battery pack. Charging software running in MADLinda's MPU measures the battery voltage, size, current and temperature. The PWM pulse width is controlled by the MPU in MADLinda which sends a control value to CCONT through a serial control data bus. The main battery voltage rise is...

Baseband Module Power Distribution

Nokia 5120

Battery voltage VBAT is connected to CCONT which regulates all the supply voltages VBB, VR1-VR7, V2V, VR1_SW, VSIM and V5V. VR7 is divided into VR7 and VR7_bias. VR7_bias is for RF, because PA is heating and this reduces the heat. CCONT enables automatically VR1, VBB, V2V_core, VR6 and Vref in power-up. When battery voltage is under 3.0V, CHAPS controls independently the charging current to battery.

Clock Time Problems

The bending of the battery-spring should always be done, also with new batteries After changing the RTC-battery it is necessary to charge it. This can easily be done by assembling the BLB-2 battery to the phone for 10 to 15 minutes (It is not necessary to switch on the phone). After that, RTC-battery should be able to save the clocktime.

Energy management Battery and charging BLP battery

The phone is powered by a 3-pole BL-6P 850 mAh battery. The three poles are named VBAT, BSI and GND where the BSI line is used to recognize the battery capacity. This is done by means of an internal battery pull down resistor. VBAT (Battery voltage) The BSI line is used to recognize the battery capacity by a battery internal pull down resistor. VBAT (Battery voltage) The BSI line is used to recognize the battery capacity by a battery internal pull down resistor.

Battery identification BSI

Different battery types are identified by a pull-down resistor inside the battery pack. In the baseband area of the transceiver, the BSI line has a 150k pull-up to VBB. The MCU can identify the battery by reading the BSI line DC-voltage level with a CCONT (N201) A D-converter.

Battery Size Resistor Measurement

The battery size, capacity is determined by measuring the voltage on the BSI pin on the battery pack when the battery is attached to the phone. The auxiliary channel 2 is used for this purpose. The BSI signal is pulled up on the base band using a 47 kohm resistor and the resistor inside the battery pack is reflecting the capacity of the battery. There are two special cases to be detected by the MCU. The first case is the Lithium battery. The Lithium battery has reserved values in the battery size table. Lithium type batteries are all the same from charging point of view. Lithium batteries are charged to a constant voltage and charging is aborted when the predefined voltage is reached. The Lithium battery capacity is a function of the battery voltage. The battery voltage drops linearly as the battery is discharged. The other case that has to be handled is the dummy battery. This battery is used for A D converter field calibration at service centers and together with a defined voltage...

Technical Summary

The HFU-2 has connections to car battery, car ignition sense, car radio muting, antenna motor control, data-card, handset HSU-1, external speaker and microphone. The unit has a System-connector that provides an interface to the Mobile holder MCC-1 via the external cable. The HFU-2 is always connected to the car battery. To save the car battery, HFU-2 goes in to the sleep mode if the car is not running and or the phone is not connected.

Ignition Sense IGNS

The ignition sense feature prevents your car kit from draining the car battery by executing an auto power off in 20 seconds after the ignition key has been turned off. The blue wire of the power cable is used for the ignition sense feature. The use of ignition sense is recommended to prevent accidental draining of the car's battery. The wire is connected via a 1 A fuse to a 12 24 volt potential that is controlled by the ignition key. Do not connect it directly to the high voltage sections of the ignition circuit.

Charging

Charging can be performed in any operating mode. The charging algorithm is dependent on the used battery technology. The battery type is indicated by a resistor inside the battery pack. The resistor value corresponds to a specific battery capacity. This capacity value is related to the battery technology as different capacity values are achieved by using different battery technology. The battery voltage, temperature, size and current are measured by the CCONT controlled by the charging software running in the MAD. The power management circuitry controls the charging current delivered from the charger to the battery. Charging is controlled with a PWM input signal, generated by the CCONT. The PWM pulse width is controlled by the MAD and sent to the CCONT through a serial data bus. The battery voltage rise is limited by turning the CHAPS switch off when the battery voltage has reached 4.2V (Lilon) or 5.2V (NiMH, 5V in call mode). Charging current is monitored by measuring the voltage...

Modes of Operation

If the battery pack is disconnect during the sleep mode, the CCONT pulls the SIM interface lines low as there is no time to wake up the MCU. Charging can be performed in any operating mode.The battery type size is indicated by a resistor inside the battery pack. The resistor value corresponds to a specific battery capacity. This capacity value is related to the battery technology as different capacity values are achieved by using different battery technology. The battery voltage, temperature, size and current are measured by the CCONT controlled by the charging software running in the MAD. The power management circuitry controls the charging current delivered from the charger to the battery. Charging is controlled with a PWM input signal, generated by the CCONT. The PWM pulse width is controlled by the MAD and sent to the CCONT through a serial data bus. The battery voltage rise is limited by turning the CHAPS switch off when the battery voltage has reached 4.2 V. Charging current is...

Baseband Testing

The MCU software enters a local mode at start-up if suitable resistors are connected to the BTEMP and BSI lines. NOTE Baseband doesn't wake up automatically when the battery voltage is connected. Power must be switched on via Within alignment those parameters are adjusted, that cannot be set accurate enough by design because of component tolerances. Due to use of 5 resistor values, the channels of the CCONT A D converters need to be aligned in the production phase. Within battery voltage tuning the MCU software reads the A D reading from CCONT at 4.1V and stores this reading to EE-PROM memory as a reference point. Another reference point is created by assuming that while the input voltage is zero, A D reading is also zero. Now the slope is known and A D readings can be calibrated. Calibration is included in VBAT A D reading task. Battery charging voltage VCHAR and current ICHAR are calibrated using one test setting. Test jig in production service must have a connection to battery...

Power Up Sequence

This is the most common way to power the system up. It is successful if the battery voltage is higher than the power on reset level set by the MCU, in the PSCLD, N300, default value 5.5 Vdc. The power up sequence is started when the power on input pin 'PWRONX' at PSCLD is activated, low. The PSCLD then internally enters the reset state where the regulators are switched on. At this state the PWM output 'CHRGSW on the PSCLD is forced active to support additional power from any charger connected. The sleep control output signal is forced high enabling the regulator to supply the VCO and startup the clock.

Charger

When a charger is connected, the CHAPS is supplying a startup current minimum of 130mA to the phone. The startup current provides initial charging to a phone with an empty battery. Startup circuit charges the battery until the battery voltage level is reaches 3.0V (+ - 0.1V) and the CCONT releases the PURX reset signal and program execution starts. Charging mode is changed from startup charging to PWM charging that is controlled by the MCU software. If the battery voltage reaches 3.55V (3.75V maximum) before the program has taken control over the charging, the startup current is switched off. The startup current is switched on again when the battery voltage is sunken 100mV (nominal).

Em Asic Vilma N

The EM ASIC (N2200) includes the following functional blocks Start up logic and reset control Charger detection Battery voltage monitoring 32.768kHz clock with external crystal Real time clock with external backup battery SIM card interface Stereo audio codecs and amplifiers A D converter

Swcoff

The master reset threshold controls the internal reset of N2200 (N2300). If battery voltage is above VMSTR, N2300's charging control logic is alive. Also, RTC is active and supplied from the main battery. Above VMSTR, N2300 allows the system to be powered on although this may not succeed due to voltage drops during start up. SW can also consider battery voltage too low for operation and power down the system.

Voltage limits

The master reset threshold controls the internal reset of EM ASICs. If battery voltage is above VMSTR, N2300 charging control logic is alive. Also, RTC is active and supplied from the main battery. Above VMSTR, N2300 allows the system to be powered on although this may not succeed due to voltage drops during start up. SW can also consider battery voltage too low for operation and power down the system.

Battery Connector

Battery voltage Maximum voltage with charger Battery temperature indication Phone has 100k 5 pull-up resistor, Battery package has NTC pull down resistor +25C 47k 5 , B 4050 3 Backup battery voltage from CHAPS Ibackup 100 A Backup battery voltage to CCONT VBACK (not specified in CCONT spec)

Power key

The system boots up when power key is pressed (adequate battery voltage, VBAT, present). All the above are powered by the main battery voltage. Battery voltage is also used on the RF side for power amplifiers (GSM PA) and for RF ASIC Ahne. Because LED driver in EM ASIC (N2300) is not used, the external SMPS is used instead. External LED SMPS is still controlled by EM ASIC (N2300) and powered by battery voltage.

SIM Interface

The power up and power down sequences of the SIM interface is performed according to ISO 7816-3. To protect the card from damage when the power supply is removed during power on there is a control signal, CARDIN, that automatically starts the power down sequence. The CARDIN information is taken from the battery size indicator signal, BSI, from the battery connector. The battery connector is designed in such a way that the BSI signal contact is disconnected first, while the power is still supplied by the battery, and the battery power contacts are disconnected after that the battery pack has moved a specified distance. To be able to handle current spikes as specified in the SIM interface specifications the SIM regulator output from PSCLD must have a ceramic capacitor of 100 nF connected between the output and ground close to the SIM interface connector. To be able to cope with the fall time requirements and the disconnected contact measurements in type approval the regulator output...

Vctcxo

After PWR-key has been pushed, CCONT gives PURX reset to MAD4 and turns on VR1, VBB and VR6 regulators (if battery voltage has exceeded 3.0 V). VR1 supplies VCTCXO, VBB supplies MAD, and VR6 supplies digital parts of CAFE. After the initial delay, t2, VCTCXO starts to give a proper 19.2MHz clock to CAFE, which further divides it to 9.83MHz for MAD4. CAFE will output the 9.83MHz clock only after the PURX reset has been removed. After delay, t3, CCONT releases PURX and MAD4 can take control of the operation of the phone. Power up when charger connected Normal battery voltage

Testing

NOTE Baseband doesn't wake up automatically when the battery voltage is connected. Power must be switched on by Parameters cannot be set accurate enough by design because of component tolerances. Due to use of 5 resistor values, the channels of the CCONT A D converters need to be aligned in the production phase. Within battery voltage tuning the MCU software reads the A D reading from CCONT at 4.1V and stores this reading to emulated EEPROM memory as a reference point. Another reference point is created by assuming that while the input voltage is zero, A D reading is also zero. Now the slope is known and A D readings can be calibrated. Calibration is included in VBATT A D reading task.

Regulators

There are three regulators in the RF unit. The 1st regulator is used for the synthesizers and the VCTCXO. The 2nd regulator is used for the receiver and the transmitter discrete circuits. The 3rd regulator is for the CRFRT, integrated RF circuit. The regulators regulate the battery voltage to the fixed 4.8 V level. The receiver, synthesizer and transmitter circuits can be switched ON and OFF separately. Switching sequence timing depends on the operation mode of the phone.

Ccontint

Interrupt from the CCONT to the MAD for example from the Real Time Clock, when a charger is connected or when an intelligent battery powers the phone up Output to the charger, when using 3-wire charging. The duty cycle of this 32Hz signal switches the output current of the ACP-9 charger. Battery voltage Battery voltage for supplying IRDA, VIBRA and BUZZER Battery voltage for the Power amplifiers (RF) Battery voltage for supplying LED's

Power Distribution

The MCU and the PSCLD circuits control charging together, detection being carried out by the PSCLD and higher level intelligent control by the MCU. Charger voltages as well as temperature and size of the battery are measured by internal ADC of MCU or RFI (depending on the state of the phone). MCU measures battery voltage via DSP by means of RFI2 internal ADC.

RF Frequency Plan

The MCU and the CCONT circuits control charging together, detection being carried out by the CCONT and higher level intelligent control by the MCU. The MCU measures battery voltage by means of the COBBA via DSP. Charger voltage and the temperature and size of the battery are followed via the MCU internal ADC.

DSP Interrupts

INT1 signal is used for the auxiliary A D converter channels in RFI2. These A D channles are used for baseband battery voltage and system board temperature monitoring . Two channels are used for battery monitoring. The start of the A D conversion task is timed in such a way that auxiliary channel 0 results are measured during transmission when the PA is active and channel 7 is measuring when the PA is off.

Backlight

The idea is to connect these six LEDs parallel. LEDs are using current that is taken from battery voltage. The voltage is controlled by charge pump (NMP code 4341137) and the current by serial resistor. The idea of the charge pump is to keep the supply voltage of the LEDs constant although Vbat changes. Serial resistors limit the current that goes to LEDs. Current for one LED is 4mA. The circuit and LEDs consume 52mA current.

Power Up and Reset

Supply battery voltage to the battery pin After receiving one of the above signals, the UEM counts a 20ms delay and then enters it's reset mode. The watchdog starts up, and if the battery voltage is greater than Vcoff+ a 200ms delay is started to allow references etc. to settle. After this delay elapses the VFLASH1 regulator is enabled. 500us later VR3, VANA, VIO and VCORE are enabled. Finally the PURX (Power Up Reset) line is held low for 20 ms. This reset, PURX, is fed to the baseband ASIC UPP, resets are generated for the MCU and The monitored battery functions are battery voltage (VBATADC), battery type (BSI) and battery temperature (BTEMP) indication.

POWER block

- control of main battery charging 3.0V VMMC supply voltage for Memory Card is generated with linear regulator (N103) from filtered battery voltage (VB). Regulator is controlled with the MMC_PWR signal from MADLinda MPUGenIO5. Accessory power output (VACC) through the system connector's DCE_DTR line is generated with 3.0 volts linear regulator (N104) from filtered battery voltage (VB). Regulator's feed back resistor are internally disconnected from the output pin when the regulator is not enabled, so output will not affect DCE_DTR line's normal signal usage. VACC regulator is controlled with VACC_CTRL -signal from MADLinda's MPUGenOutl. . Main battery voltage The BSI contact on the battery connector is also used to detect when the battery is being removed to be able to shut down the operations of the SIM card before the power is lost. The BSI contact is shorter than the supply power contacts so this contact breaks first when the battery pack is removed, giving some time for the...

Internal Audio

The buzzer is controlled by the PWM output provided by the audio codec, N200. Transistors V201 and V202 acts as amplifier and, impedance conversion for the low impedance buzzer. The buzzer is driven directly from the battery voltage. As the buzzer is connected to the baseband via the keyboard the battery voltage provided by VBKEY and the buzzer driving signal BUZZER are EMC protected. As the buzzer is a dynamic one the impedance shows a clear inductance. Therefore a free running diode V203 is used to clip the voltage spikes induced in the buzzer line when the buzzer is switched off.

Cobba

It should not be possible for charging current to flow from the backup battery into VOUT if VOUT happens to be lower than VBACK. Charging current will gradually diminish as the backup battery voltage reaches that of the regulation voltage. RTC backup battery charging Battery voltage, idle mode

Chaps

The CCONT ASIC provides linear regulated power to most of the phone. It has a multiplexed A D converter for temperature sensor digitization, battery voltage, charger voltage, current consumption, and battery type detection. An external 32 kHz oscillator circuit is connected to CCONT, which is used for sleep clock generation. It also has a watchdog circuit used to power off the phone in the event that MCU receives an interrupt from power key depression, or an event has caused a process to over run and MCU does not service the register to prevent the watchdog timer from timing out.

Power Up

Intelligent battery packs have a possibility to power up the phone. When the battery gives a short (10ms) voltage pulse through the BTEMP pin, the CCONT wakes up and starts the power on procedure. When the charger is connected CCONT will switch on the CCONT digital voltage as soon as the battery voltage exeeds 3.0V. The reset for CCONT's digital parts is released when the operating voltage is stabilized ( 50 us from switching on the voltages). Operating voltage for VCXO is also switched on. The counter in CCONT digital section will keep MAD in reset for 62 ms (PURX) to make sure that the clock provided by VCXO is stable. After this delay MAD reset is relased, and VCXO -control (SLEEPX) is given to MAD. The diagram assumes empty battery, but the situation would be the same with full battery When the phone is powered up with an empty battery pack using the standard charger, the charger may not supply enough current for standard powerup procedure and the powerup must...

Info

RTC backup battery charging It should not be possible for charging current to flow from the backup battery into VOUT if VOUT happens to be lower than VBACK. Charging current will gradually diminish as the backup battery voltage reaches that of the regulation voltage. A vibra alerting device is used for giving silent signal to the user of an incoming call. The device is not placed in the phone but it will be added to a special battery pack. The vibra is controlled with a PWM signal by the MAD via the BTEMP battery terminal. Battery voltage, idle mode

Power Down Schemes

By letting the battery voltage drop below the operation limit (either by not charging the battery or by removing it) Battery Voltage Drop Initiated Power Down Procedure When battery voltage approaches the cutoff voltage the phone will notify the user of the situation. If the user does not charge the battery the battery voltage will eventually drop below the operation cutoff voltage and the

Real Time Clock

It should not be possible for charging current to flow from the backup battery into VOUT if VOUT happens to be lower than VBACK. Charging current will gradually diminish as the backup battery voltage reaches that of the regulation voltage. A vibra alerting device is used for giving silent signal to the user of an incoming call. The device is not placed in the phone but it will be added to a special battery pack. The vibra is controlled with a PWM signal by the MAD via the BTEMP battery terminal.

Protection

The regulator VRTC that supplies the real time clock is disabled in BACK_UP mode. Instead the unregulated backup battery voltage VBACK supplies the output of the VRTC. All other regulators are disabled and the phone has no functionality. Product NPL-2 uses the so called case-less Li Ion battery BL-4C. BL-4C battery capacity is 720mAh. This battery has a three-pin connector (BTEMP is not used). The battery does not support temperature measurement inside battery pack. In order to get temperature information of the battery, a NTC is mounted on the PWB within the BB area. Under normal conditions, the battery powers the baseband module. Individual regulators located within the UEM regulate the battery voltage VBAT. These regulators supply the different parts of the phone. 8 regulators are dedicated to the RF module of the phone, and 6 to the baseband module.

Keyboard Interface

The keypad matrix is located on a UI module PCB,intefacing is acomplished by the board to board connector X101. The power-on key is also connected to the PSCLD to switch power on. Due to the internal pull up inside PSCLD, N300 to a higher battery voltage, a rectifier, V418 on the UI board is required in the keypad matrix for the power on keypad to prevent the higher voltage to interfere with the keypad matrix.

Sleep Mode

If the battery pack is disconnect during the sleep mode, the CCONT should power down the SIM in the sleep mode as there is no time to wake up the MCU. The power management circuitry controls the charging current delivered from the charger to the battery. Charging is controlled with a PWM input signal, generated by the CCONT. The PWM pulse width is controlled by the MAD and sent to the CCONT through a serial data bus. The battery voltage rise is limited to a specified level by turning the switch off. Charging current is passed through protection ASiC CHAPS and monitored by measuring the voltage drop across a 220mohm resistor.

Audiorfi block

Audio amplifier IC (N201) is used to amplify the HF output signal of COB-BA_GJP for the personal hands free speaker. Audio amplifier shut down mode is controlled with MADLinda's MPUGenOut0 line. Because HF amplifier is powered from battery voltage, controlling of shut down is done through pull-down fet (V200).

Digital control

The MAD operates from a 13 MHz system clock, which is generated from the 13Mhz VCXO frequency. The MAD supplies a 6,5MHz or a 13MHz internal clock for the MCU and system logic blocks and a 13MHz clock for the DSP, where it is multiplied to 52 MHz DSP clock. The system clock can be stopped for a system sleep mode by disabling the VCXO supply power from the CCONT regulator output. The CCONT provides a 32kHz sleep clock for internal use and to the MAD, which is used for the sleep mode timing. The sleep clock is active when there is a battery voltage available i.e. always when the battery is connected.

External Audio

INT1 signal is used for the auxiliary A D converter channels in RFI2. These A D channles are used for baseband battery voltage monitoring. Two channels are used for battery monitoring. The start of the A D conversion task is timed in such a way that auxiliary channel 1 results are measured during transmission whne the Pa is active and channel 8 is measuring when the PA is off.

Transceiver

The battery identification line is used also for battery removal detection. The BSI line is connected to a SIMCardDetX line of MAD2 (D200). SIMCardDetX is a threshold detector with a nominal input switching level 0.85xVcc for a rising edge and 0.55xVcc for a falling edge. The battery removal detection is used as a trigger to power down the SIM card before the power is lost. The BSI contact in the battery pack is made 0.7mm shorter than the supply voltage contacts so that there is a delay between battery removal detection and supply power off.

Deep Sleep Mode

The sleep mode is exited either by the expiration of a sleep clock counter in the MAD2PR1 or by some external interrupt, generated by a charger connection, key press, headset connection etc. The MAD2PR1 starts the wake up sequence and sets the VCXOPwr control high. After VCXO settling time other regulators and clocks are enabled for active mode. If the battery pack is disconnect during the sleep mode, the CCONT shall power down the SIM in the sleep mode as there is no time to wake up the MCU.

MCU Flash Loading

The interface lines between the flash prommer and the baseband are in low state when power is not connected by the flash prommer. The data transfer between the flash programming equipment and the base band is synchronous and the clock is generated by the flash prommer. The same USART that is used for MBUS communication is used for the serial synchronous communication. The PSCLD watchdog is disabled when the flash loading battery pack and cable is connected. After the flash battery pack adapter has been mounted or the test connector has been connected to the board the power to the base band module is connected by the flash prommer or the test equipment. All interface lines are kept low except for the data transmit from the baseband that is in reception mode on the flash prommer side, this signal is called TXF. The MCU boots from ASIC and investigates the status of the synchronous clock line.

Imokia

Transceiver with BP-4L battery pack Transceiver with BP-4L battery pack Note A new battery's full performance is achieved only after two or three complete charge and discharge cycles The battery can be charged and discharged hundreds of times but it will eventually wear out. When the operating time (talk-time and standby time) is noticeably shorter than normal, it is time to buy a new battery. Use only batteries approved by the phone manufacturer and recharge the battery only with the chargers approved by the manufacturer.

Desktop Stand CGH

In addition, the desktop stand offers a discharging facility for the spare battery. Discharging helps extend battery life. Place the spare battery in the stand and press the discharge button. When the battery is totally discharged, recharging will begin automatically. You can also stop discharging before it is finished by pressing the button again. Recharging will begin immediately.

Rtc Alarm detected

If the phone is off when the charger is connected, the phone is powered on but enters a state called Acting Dead, in this mode no RF parts are powered. To the user, the phone acts as if it was switched off. A battery charging alert is given and or a battery charging indication on the display is shown to acknowledge the user that the battery is being charged.

Backup battery

The same symptom can also be seen when the backup battery is empty. About 5 hours is needed to fully charge the backup battery in the device. NOTE Backup battery is charged only the same time with main battery charging. Or when the device is LOCAL or TEST mode. Enable backup battery charging (start to charge main battery or boot device to LOCAL or TEST mode)

CTRLU Circuit

CTRLU controls the watchdog timer in PSA. It sends a negative pulse at approximately 0,1 s to XPWROFF pin of the PSA to keep the power on. If CTRLU fails to deliver this pulse, the PSA will remove power from the system. When power off is requested CTRLU leaves PSA watchdog without reset. After the watchdog has elapsed PSA cuts off the supply voltages from the phone. CTRLU controls also the charger on off switching in the PWRU block. Battery charging is controlled by CSW line, which is PWM-controlled output port. Battery voltage

Baseband Submodule

The nominal battery voltage in NHX-7 is 3.6V. The actual battery voltage varies between 3.0 to 4.2V 5.3V depending on the used cell type (Li-Ion or NiMH) and whether the phone is connected to a charger (limit on 5.3V with NiMH battery in idle). Battery charging is controlled by a PWM signal from the MCU. The PWM duty cycle is determined by a charging software. The PWM signal is fed to the CHAPS charging switch and through the charging pins to an external charger. There can be two types of chargers connected to the phone.

NHX Introduction

The NHX-7 is a radio transceiver unit designed for the ETACS network. It is a power class 4 transceiver providing 6 power levels with a maximum output power of 0.45W. Nominal battery voltage is 3.6 V and operating voltage on logic chips is 2.82 V. The transceiver consists of UIF module, system module, assembly parts and battery pack. Standard Battery Pack, 900 mAh Vibrator Battery Pack, 900 mAh Extended Battery Pack, 1500 mAh Slim Battery Pack, 900 mAh Special Battery Pack, 1000 mAh Nominal battery voltage Battery voltage, idle mode Battery charging temperature Supply battery voltage

PWRU Circuit

How Show Battery Temp Schematic

Battery charging charging to a phone with an empty battery. The startup circuit charges the battery until the battery voltage level reaches 3.0V (+ - 0.1V) and the PSA releases the PURX reset signal and program execution starts. Charging mode is changed from startup charging to PWM charging that is controlled by the MCU software. If the battery voltage reaches 3.55V (3.75V maximum) before the program has taken control over the charging, the startup current is switched off. The startup current is switched on again when the battery voltage has decreased to 100mV (nominal). When the switch in output overvoltage situation has once turned OFF, it stays OFF until the the battery voltage falls below VLIM1 (or VLIM2) and PWM LOW is detected. The switch can be turned on again by setting PWM HIGH. Different battery types are identified by a pull-down resistor inside the battery pack. The BSI line inside transceiver has a 22k pull-up to VA. The MCU can identify a battery by reading the BSI line...

R308 Resistor Nokia

Anatomical Position Chart

The baseband power is controlled by the programming jig in production, and the flash prommer (via the flashing battery) in reprogramming situations. Reprogramming uses the flashing battery to apply a supply voltage to the battery terminals and power up the baseband. The battery and supply voltage generated by the flash prommer interface equipment should not exceed 4.2 V.

CMT Module MA

Battery 17 The CCONT comprises 6 individually controlled regulator outputs for RF-section and two outputs for the baseband. In addition, there is one +5V power supply output (V5V). The CCONT also comprises a SIM interface, which supports both 3V and 5V SIM-cards. A real time clock function is integrated into the CCONT, which utilizes the same 32kHz clock supply as the sleep clock. The battery charging is controlled by a PWM-signal from the CCONT. Battery voltage Battery temperature indication Phone has a 100k (+-5 ) pullup resistor, Battery package has a NTC pulldown resistor.

Power Supply

The DC DC converter is the only unit which draws current from the 2 cell NiMH battery pack. The battery voltage, Vb, is up converted through the DC DC converter to an output voltage level, Vdc_out, which is dependent on the phone state (operating mode) and in call mode depending upon which band and on what power level the phone is transmitting at. The battery consists of two NiMH cells and a polyswitch, all assembled into the battery pack. An external charger can be used for recharging the battery and supplying power to the phone. The charger can be either a two wire type of charger, or a 3-wire charger, so called performance charger. The resistors R131 and R132 forms together with the transistor V109a and R134 a circuit which will shut down the switcher when the battery voltage reaches 1.4V in order not to drain the battery below a limit of insufficient current capability. Additionally this circuit generates via V109b an interrupt to the MAD2PR1 SIMCardDetX, when the battery is...

Vcxo

After the PWR-key has been pushed, the CCONT gives PURX reset to the MAD and COBBA, and turns on the VR1, VBB and VR6 regulators (if battery voltage has exceeded 3.0 V). VR1 supplies the VCXO, VBB supplies the MAD and digital parts of the COBBA, and VR6 supplies analog Power off when battery voltage low During normal discharge the phone indicates the user that the battery will drain after some time. If not recharged, the SW detects that battery voltage is too low and shuts the phone off through a normal power down procedure. Anyway, if the SW fails to power down the phone, the CCONT resets and powers down the phone if the battery voltage drops below 2.8V.

Chaps Battery

From hardware point of view the phone could otherwise continue functioning normally, but if the charger voltage is higher than the maximum allowed battery voltage, this can damage the RF parts. Therefore, output overvoltage protection is needed in case the battery is removed when a charger is connected, or if a charger is connected before the battery to the phone. With a charger connected, if VBAT exceeds preset limits in CHAPS, the switch turns OFF immediately (soft switching bypassed). There are two voltage limits, VLIM1 and VLIM2. VLIM input '0' selects VLIM1, VLIM input '1' selects VLIM2.

Operation

The PHF-3 has external connections to car battery, ignition sense, car radio muting, external microphone and external speaker. The unit has a HF-connector that provides an interface to the phone via external antenna unit. The connection can be made directly or using the extension cable between PHF-3 and AAH-1D. There is also an internal speaker inside the handsfree unit. The PHF-3 is always connected to the car battery. To save the car battery, PHF-3 goes in to the sleep mode if the car is not running and or the phone is not connected.

Power

If the battery voltage is dropped below the operation limit, either by not charging it or by removing the battery. The power down is controlled by the MAD. When the power key has been pressed long enough or the battery voltage is dropped below the limit the MCU initiates a power down procedure and disconnects the SIM power. Then the MCU outputs a system reset signal and resets the DSP. If there is no charger connected the MCU writes a short delay to CCONT watchdog and resets itself. After the set delay the CCONT watchdog expires, which activates the PURX and all regulators are switched off and the phone is powered down by the CCONT.

DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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