Page 4
- MOTOROLA CONFIDENTIAL PROPRIETARY -
GSM Krunch - Level 3 Procedure vers.1.1
03/05/1999
NO SHORT
Supplement 1
No pwr up main/aux
batt.
Supplement 2
Battery selection
1) Check the main battery contact flip, B+ no shorting to vibrator, the flex and J601
2) Check the aux battery contact on the PCB and on the rear h.
1) It's important to use the paint battery select schematics enclosed on page 24-25.
2) It is recommended to start from the gates of Q999,Q1008 and go back to the inputs.
3) It's likely to the faulty components are NOR logic ports (U904,908,909),NOT(U907),Dual diode Schottky
(CR607,608,606).
4) Attention at WATER DAMAGE problem.
5) Attention at Zener diode burned as VR901(8.2V), CR904-CR1001-CR999(6.8V)
Supplement 4
PCB only
Pwr dwn/twisted
Check Y201 main cristal and NOTE 1
(Check 13MHz with osc.scope probe U703 BIC at pin 17 ifit pwr dw hitting )
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