Daewoo DP-42GM, Service Manual

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Main PCB Trouble Diagnosis
9-5. CONNECTION PCB & DATA COF Trouble Diagnosis
1. If vertical line is missing or the discharge is other than bar shape on the screen, check
CONNECTION and DATA COF.
2. Check CONNECTION and/or DATA COF if following.
When P202 is connected, if Vadd and/or 5V is not supplied normally.
But, when separated, Vadd and/or 5V is supplied normally.
If this is the case, check each connectors connection. (Check if there isn t any extraneous
material between the Connector pins. Check whether cables and FPC are correctly connected)
Check the chip resistance(four parallel connected 47 ohm ) located left and right of each PC
1~7 of CONN-LEFT/RIGHT PCB to see if open/short circuit..
If all above are normal, unscrew DATA COF and observe DIODE TESTER.
: Check C 5 ~ 8 If over 0.4V, Normal.
C 1~4 If over 0.45V, Normal.