Daewoo DTD-14D3 ME Service Manual page 54

APPENDIX
TROUBLE SHOOTING CHARTS
4-2. NO ON-SCREEN DISPLAY (PICTURE OK)
CHECK SIGNAL AT PIN
38,39,40,41 OF I701
(OSD & TEXT SIGNAL)
NORMAL
CHECK SIGNAL AT PIN
15,16,17,18 OF I501
(OSD & TEST SIGNAL)
NORMAL
CHECK SIGNAL AT PIN
20,21,22 OF I501
ABNORMAL
CHECK / REPLACE
I501
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ABNORMAL
ABNORMAL
- 23 -
CHECK SIGNAL AT PIN
19,20 (HORI. & VERTI,
SYNC) OF I701
CHECK / REPLACE
PIP BOARD