Micom Failure - Samsung CA17K Series Service Manual

5 Troubleshooting
5-1-17 No Highlight Zone (CA17J* Only)
IC101 Pin 2, 4 and 6
inputs are right?
Yes
IC101 Pin 20, 22 and 24
18
outputs are right?
Yes
IC101 Pin 12, 13 are right?
2
(I C Data / Clock Line)
IC101 Pin 14, 15 and
19 20 V_FLB, CLAMP
waveforms are right?
Done.

5-1-18 Micom Failure

IC201 Pin 11 input voltage is 5V?
Yes
IC201 Pin 13 and 14
21
inputs are right?
Yes
IC201 Pin 18 input is right?
Yes
All in/output values are right?
Yes
Done.
5-10
No
Check +5V IC101 pin 1, 23.
No
Check Micom (IC201)
2
I C Data / Clock Line.
No
Check CLAMP, V_FLB waveforms.
No
Check IC604.
No
Check C202, C203 and X201.
No
Check IC605 and 5V.
No
Replace IC201.
CONFIDENTIAL
WAVEFORMS
1.00 V (IC101, #20, 22, 24)
18
1.00 V (IC101, #14)
19
1.00 V (IC101, #15)
20
WAVEFORMS
1.00 V (IC201, #13, 14)
21
CH1 P-P = 1.00 V CH1 RMS = 2.108V
CA17K*/CA17J*