Samsung CT2088BL6X/XAP Service Manual page 18

Troubleshooting
4-4 No Signal
IC201 Pin 43 waveform
Abnormal
IC201S Pins 19,20, 21
Check CRT PCB (180V)
Replace IC201S.
4-4
Abnormal
Check voltage
line.
Check IC201S Pin 41
waveform level.
Normal (2Vp-p)
Check
level.
Normal (1Vp-p)
Check
waveform level.
Normal (3~5Vp-p)
and heater Voltages.
No Signal
Check
each tuner terminal
voltage.
Abnormal
Check
Micom IC901.
AFTadjustment are normal in
Abnormal
Normal (1Vp-p)
Normal
Check
tuner SCL,SDA
waveform.
Normal
Check
IC201S Pins 7,8
waveform.
Normal
Check
whether AGC and
Abnormal
the service mode.
Normal
Check
IC201S Pin 47
waveform level.
Normal (2Vp-p)
Check IC201S
Pin 37 waveform
level.
Normal
Check
tuner IF terminal
waveform.
Abnormal
Replace tuner.
Readjust AGC
and AFT.
Samsung Electronics