AOC LM-729 Service Manual page 39
17” lcd monitor
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Also See for LM-729:
- Especificações técnicas (1 page) ,
- User manual (26 pages) ,
- Service manual (60 pages)
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LM-729 Service Manual
4.U4-DATA OUTPUT
Measured DCLK(pin 15 or pin 16 from U4)
DVS, DHS (pin 1,4 from U4 )
Is the waveform ok?
DCLK around 48 MHZ , DVS=60.09Hz , DHS
around 80 KHz ?(refer to input
signal=640x480@60 Hz 31k, and LED is
Green)
Check U4 GM5126/2126
Signal output
(PIN17-22,27-32,39-44,51-56,61-66)
Is the waveform ok ?
OK
OK
OK
NG , no transition
Replace GM5126 /2126 (U4) or
replace MAINBOARD.
If MainBoard being replace , please
do the DDC – content reprogrammed
Rev: A
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