36
4.U203-Data Output
Measured DCLK(R240)DVS, DHS (pin 117,116 from U203 )
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)
NG , no transition
OK
Replace GM5120 (U203) or replace
MAINBOARD.
Check U203 gm2120, Signal output
ER0~7,EG0~7,EB0~7,OR0~7,OG0~7,OB0~7, Is the
waveform ok ?
If MainBoard being replace , please
do the DDC – content
Replace U301,U302 LVDS IC or
replace MAINBOARD.
OK
OK
Check U301,U302 LVDS IC Signal output
Is the waveform ok?
