LCD Keypad Illumination

In NPM-9 blue leds are used for LCD and keypad illumination. For LCD illumination four leds are used and for keypad six leds. 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. LEDs are controlled by the UEM PWM outputs. Both LEDs...

Modes of Operation

LA5 baseband engine has six different operating modes In NO_SUPPLY mode the phone has no supply voltage. This mode is due to disconnection of main battery and backup battery or low battery voltage level in both of the batteries. Phone is exiting from NO_SUPPLY mode when sufficient battery voltage level is detected. Battery voltage can rise either by connecting a new battery with VBAT > VMSTR+ or by connecting charger and charging the battery above Vmstr+. In BACKUP mode the backup battery has...

Frequency synthesizers

VCO frequency is locked with PLL into stable frequency source, which is a VCTCXO-module ( voltage controlled temperature compensated crystal oscillator ). VCTCXO is running at 26 MHz. Temperature drifting is controlled with AFC ( automatic frequency control ) voltage. VCTCXO is locked into frequency of the base station. AFC is generated by baseband with a 11 bit conventional DAC. 13MHz VCTCXO can also be used if multislot operations is not needed. If more than 1(RX)+1(TX) slot is wanted...

ACP Standard Charger

Nokia Charger Repair

The standard charger is available for different voltage levels and comes with different wall plugs. The standard charger can also be used as a power supply for the desktop stand. Standard Standard Standard Standard Standard Standard Charger (Euro plug) 207-253 Vac Charger (US plug) 108-132 Vac Charger (US plug) 198-242 Vac Charger (UK plug) 207-253 Vac Charger (UK plug) 180-220 Vac Charger (Australia) 216-264 Vac ACP-7E ACP-7U ACP-7C ACP-7X ACP-7H ACP-7A 3.5 mm DC plug, 2-pole PTC protection...

Transceiver NPM Introduction

The NPM-9 is a dual band radio transceiver unit for the E-GSM900 and GSM1800 networks. GSM power class is 4 and GSM1800 power class is 1. It is a true 3 V transceiver, with an internal antenna and vibra. The NPM-9 phone includes integrated FM radio. Radio is used as a normal mono receiver. FM radio is highly integrated. Only few external components are needed. Headset is used as an antenna for radio. The transceiver has a full graphic display and the user interface is based on a Jack style UI...

ESD Protection

Nokia requires that phone repair places have sufficient ESD protection (against static electricity) when servicing cellular phones. A cellular phone, which is ready for use, can be handled normally without ESD protection. The SIM card and battery can be replaced in normal conditions of use. To replace the color cover ESD protection must be applied, except for the phone covers which can be replaced by the customer. All electronic parts of the phone , including the display, are susceptible to...

BLB Standard Battery

750 mAh Li-Ion semi-fixed battery internal battery that can be changed by the user laser printed type label with bar code for traceability Dimensions (H x W x D) 53 x 33.1 x 7.1 mm Product code (Eur Afr & APAC type label) 0670246 Product code (French type label) 0670262 Product code (Chinese type label) 0670254 Product code (Americas type label) 0670322

Loopset LPS

Loopset LPS-3 has been developed for hearing aid users to allow them to use mobile phones. It is based on induction technology. All hearing aids have support for induction loop, i.e. they have a little tele-coil inside. This coil can capture the signal supplied to the loop. Standard hearing aids have two operation modes M-mode for normal microphone use and T-mode for telecoil use. Note (1) The capacity of the zinc air battery will fall 20 in a month. After the activation the zinc air battery...

Upp

UPP (Universal Phone Processor) is the digital ASIC of the baseband. UPP includes 8MBit internal RAM, ARM7 Thump 16 32-bit RISC MCU core, LEAD3 16-bit DSP core, ROM for MCU boot code and all digital control logic. Main functions of the custom logic are 1. Interface between system logic and MCU DSP (BodyIf) 2. Clocking, timing, sleep and interrupt block (CTSI) for system timing control 3. MCU controlled general purpose USART, MBUS USART and general purpose IOs (PUP). 7. Interfaces for keyboard,...

LCH Mobile Charger

A green light indicates that the cigarette lighter charger is ready for charging. Check the charging status on the phone display. The input voltage can be from 11 or 32 V DC, negative grounding. Product code English type label 0675120 Product code Chinese type label 0675239 Product code made by manufacturer 0675170 output nominal Nominal output current input fused, output current limit 850 mA

Backup Battery

Backup battery is used in case when main battery is either removed or discharged. Backup battery is used for keeping real-time clock running for minimum of 30 minutes. Rechargeable backup battery is connected between UEM VBACK and GND. In UEM backup battery charging high limit is set to 3.2V. The cutoff limit voltage VBUCoff- for backup battery is 2.0V. Backup battery charging is controlled by MCU by writing into UEM register. Polyacene SMD battery type is used. The nominal capacity of the...

AC and DC Characteristics of RFBB voltage supplies

Cut-off level of regulators is 3.04V. Losses in pwb tracks and ferrites are taken account to minimum battery voltage level. Supply for varactor for UHF VCO tuning. Supply for part of transmit strip. Supply for TX I Q-modulators. Supply for Hagar RX preamp., mixer, DTOS Noise density decades 20dB dec from 6Hz to 600Hz. From f gt 600Hz maximum noise density Supply for Hagar PLL dividers, LO-buffers, prescaler, Note Below 600Hz noise density is allowed to increase 20 dB oct Noise...

Power Up and Reset

Power up and reset is controlled by the UEM ASIC. NPM-9 baseband can be powered up in following ways 1. Press power button which means grounding the PWRONX pin of the UEM 2. Connect the charger to the charger input 3. Supply battery voltage to the battery pin 4. RTC Alarm, the RTC has been programmed to give an alarm 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...

Warnings and Cautions

Please refer to the phone's user guide for instructions relating to operation, care and maintenance including important safety information. Note also the following 1. CARE MUST BE TAKEN ON INSTALLATION IN VEHICLES FITTED WITH ELECTRONIC ENGINE MANAGEMENT SYSTEMS AND ANTI-SKID BRAKING SYSTEMS. UNDER CERTAIN FAULT CONDITIONS, EMITTED RF ENERGY CAN AFFECT THEIR OPERATION. IF NECESSARY, CONSULT THE VEHICLE DEALER MANUFACTURER TO DETERMINE THE IMMUNITY OF VEHICLE ELECTRONIC SYSTEMS TO RF ENERGY. 2....