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This document is intended for use by authorized NOKIA Service Centers only. The purpose of this document is to provide some further service information for NOKIA 3310 3330 phones. It contains a lot of collected tips and hints to find failures and repair solutions easily. It also will give support to the inexperienced technicians. Saving process time and improving the repair quality is the aim of using this document. We have built it up based on fault symptoms (listed in Contents) followed by...

Failure message MCU boot failure serial clockdataline failure

If fault-code from prommer is one of the above mentioned and phone does not stay on, disable watchdog by connecting R224 to ground and try to update again. If fault remains, check the following - Check VBB 2.8 VDC at C209 211 - Check VCORE 1.7 VDC at both sides of L200 - Check SLEEPX 2.8 VDC at J308 and PURX 2.8 VDC at R308 - Check 13 MHz system-clock at C303, 0.5 Vpp sinewave If only one of the above-mentioned signals is not measurable, continue with section Phone does not switch on. If all...

No RXcalibration GSM possible

Use WinTesla to set phone into local mode and activate under Testing RF Controls RX Ch.38, burst mode. Set RF-generator to RF-level output of -65 dBm. The first to do, as in case of TX-faults, check signal of 26 MHz reference oscillator at C546 (see figure 12-1 on page 29) Amplitude of spectrum is around -10 dBm. If signal is not ok, check Vtcxo 2.6 VDC at C543 544 and AFC-voltage at C552, which normally is 1.2 VDC but may vary between 0.3 V and 2.3 VDC. If AFC-voltage is 0 V, especially check...

Customer Care Europe Africa SCCE Training Group

In case that the signal shown in figure 3-2 is not measurable, check voltages at reference oscillator G502 Check VCC 2.6 VDC at G502 pin 2, also check control voltage (AFC) at pin 1 which normally is 1.2 VDC. Note that control voltage may vary between 0.1 VDC and 2.3 VDC. Even without control voltage the oscillator must be able to work on a frequency around 26 MHz as shown in the Figure 3-3. If this is not the case you have to change G502. 26 MHz reference clock at the output of G502 Amplitude...

Display message Not Charging

If this message appears on the display after connecting charger to the phone, first you should run the energy management calibration to get more information about the fault. If calibration is possible without failure message, check if charging works now. If calibration does not work, following failure messages are possible Check voltage at C235, normally 0.5 VDC in service-jig. If voltage is not ok, check R220 222 for defect or broken solderings, also check that C235 236 have no shorts to...