Micom Failure - Samsung CF21M Service Manual

5 Troubleshooting

5-1-18 Micom Failure

IC201 Pin 13 input is over 4.2V?
Yes
IC201 Pin 32 and 33
16 17
inputs are right?
Yes
IC201 Pin 40 input is High Active?
Yes
All in/output values are right?
Yes
Done.
5-10
No
Check IC650.
No
Check X201, C203 and C204.
No
Check and replace IC202.
No
Replace IC201.
WAVEFORMS
3.42 V (IC201, #33)
16
CH1 P-P = 3.42 V CH1 RMS = 2.500V
3.16 V (IC201, #32)
17
CH1 P-P = 3.16 V CH1 RMS = 2.560 V
CF21M*