LG L1750SQ-SN Service Manual - Page 18

LG L1750SQ-SN Manual

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4. TROUBLE IN DPM TROUBLE IN DPM 3 CHECK R216, R217 R778, R781 YES NO CHECK PC PC IS NOT GOING INTO DPM OFF MODE CHECK U501 PIN 43.44 SYNC PULSE ? NO CHECK H/V SYNC LINE YES TROUBLE IN U501 Waveforms 3 R216, R778 H-Sync 3 R217, R781 V-Sync - 17 - 龙泉现代YDW资料收藏

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4. TROUBLE IN DPM
TROUBLE IN DPM
NO
NO
TROUBLE IN U501
CHECK PC
PC IS NOT GOING
INTO DPM OFF MODE
CHECK H/V SYNC LINE
YES
YES
CHECK
R216, R217
R778, R781
CHECK
U501 PIN 43.44
SYNC
PULSE ?
3
3
Waveforms
R216, R778 H-Sync
3
R217, R781 V-Sync
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