Figure 11: Fault Finding For Network Registration Or Call Problems (Cont'd) - Nokia NSB-5 Series Troubleshooting Instructions
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Also See for NSB-5 Series:
- Technical documentation manual (106 pages) ,
- Disassembly instructions manual (6 pages)
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NSB-5
Troubleshooting Instructions
RF control lines:
AGC (R610) 0->2.3Vmax during receiving slot
AFC (C720) 0- 1.2V typ. during receiving slot
OK?
Yes
Analog data signals:
RxIP & RxIN (C640, C641) 0->1.5V DC during
receiving slot
Recieved signal is biased to DC, amplitude 50mVpp
nominal and frequency 13MHz
OK?
Yes
RF control line:
TxC (C524) 0->2.3Vmax during transmit slot
OK?
Check N200 if TxC fail
else
Check D300
Figure 11: Fault Finding for Network Registration or Call Problems (Cont'd)
Page 16
D
Analog data signals:
TxIN & TxIP (C525) 0->0.8V DC during transmit slot
TxQN & TxQP (C526) 0->0.8V DC during transmit slot
No
Transmit signal is biased to DC, amplitude 300mVpp and
frequency 64kHz
Yes
Check RF part
Nokia Mobile Phones Ltd.
PAMS Technical Documentation
No
Check N200
No
Check N200 if DC fail
or
RF part
Yes
OK?
No
Check N200
Issue 1 03/01
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