Daewoo DP-42SM Service Manual page 30

S- VHS input : Check 24th pin of P502 (when COLOR BAR PATTERN).
(3) TP DECOE Check
If DECOE signal do not appear, JACK PCB has a trouble.
(cf. When COMPOSITE NTSC 3.58MHz, check TP COMB. CCOMB as well)
(4) Check TP VVS, VHS, VCLK and VPEN1
If VVS, VHS, VCLK and VPEN1 signal do not appear, JACK PCB has a trouble.
3. When DTV (1080i, 720P, 480P) signal do not appear on screen
(1) Input PC or VIDEO signal and see if PC or VIDEO signals shown on screen.
If no signal, check TP DCLKB, DHS and DVS.
If DCLKB, DHS and DVS signal do not appear, VIDEO PCB has a trouble.
(2) Check P502 s 1st PIN(V SYNC) , 2nd PIN(H SYNC) check-<when 1080i >
If above signals do not appear, JACK PCB has a trouble.
(3) Check TP GHS, GVS and GCLK.
If GHS, GVS and GCLK signal do not appear, JACK PCB has a trouble.
If above signal do not appear, JACK PCB has a trouble.
Main PCB Trouble Diagnosis
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