General Troubleshooting - Samsung CHB5707L/5237L Service Manual

7-2 General Troubleshooting

7-2-1 No Picture
LED blinks?
No
LED is green color?
Yes
Check G2 voltage, high voltage,
R, G, B cathode voltage.
7-2-2 Shut Down
Blinking LED's?
Yes
Scan failure
No
High voltage failure?
No
Video failure?
No
Check and replace IC201.
Done
CHB5**7L/6**7L/7**7L
Yes
Refer to 7-2-2 Shut down.
No
Check Micom.
No
Check power supply.
Check horizontal, vertical deflection
Yes
system and check power supply
secondary voltages.
Yes
Check high voltage system.
Yes
Check Video board.
7 Troubleshooting
7-13