Nokia 920C Service Manual page 24

5 Troubleshooting
5-1-17 Micom Failure
IC201 Pin 11 input is right?
Yes
IC201 Pins 13 and 14 inputs
12
are right?
13
Yes
IC201 Pin 18 input is right?
Yes
All in/output values are right?
Yes
Done
5-10
No
Check IC606.
No
Check X201, C204 and C205.
No
Check IC202.
No
Replace IC201.
WAVEFORMS
12 3.42 V (IC201, #33)
CH1 P-P = 3.42 V CH1 RMS = 2.500 V
13 3.16 V (IC201, #32)
CH1 P-P = 3.16 V CH1 RMS = 2.560 V
720C/920C