CONFIDENTIAL
5 Troubleshooting
5-10
CF21G*
5-1-18 Micom Failure
IC201 Pin 35 input is over 4.2V?
IC201 Pin 8 and 9
inputs are right?
Check X201, C203 and C204.
Yes
Yes
No
Check IC650.
No
All in/output values are right?
Replace IC201.
Yes
No
Done.
16
17
WAVEFORMS
16
3.42 V (IC201, #8)
CH1 P-P = 3.42 V
CH1 RMS = 2.500V
17
3.16 V (IC201, #9)
CH1 P-P = 3.16 V CH1 RMS = 2.560 V
5-1-19 OSD Failure
IC103 Pin 6 and 17
waveforms are right?
Is there 5V on IC103 Pin 5 and 24?
IC102 Pins 1, 2 and 3,
4 input is right?
Check and replace IC103.
Yes
Yes
No
Check and replace
Q104, IC201 Pin 23.
Check 5V Line.
No
Does the Voltage Change on
IC201 Pins 16, 17 When you
push the control Button?
Check CN204 and Assy.
Yes
No
Check IC201.
Done.
Check CN102 and connector Ass’y.
18
19
WAVEFORMS
18
IC103, #6, 17
19
IC103, #5, 24
Summary of Contents for CF21G Series
Page 32: ...CONFIDENTIAL CF21G 6 1 6 Exploded View and Parts List ...
Page 33: ...Memo 6 Exploded View Parts List 6 2 CF21G CONFIDENTIAL ...
Page 61: ...CONFIDENTIAL Memo 8 Block Diagrams 8 2 CF21G ...
Page 63: ...Memo 9 Wiring Diagram 9 2 CF21G CONFIDENTIAL ...
Page 65: ...CONFIDENTIAL 10 Schematic Diagrams 10 2 CF21G 1 368 V IC601 1 ...