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IBM L170 Service Manual
33
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 /2120 (U203) or
replace MAINBOARD.
Check U203 GM5120/2120
Signal output ER0~7,EG0~7,EB0~7
OR0~7,OG0~7,OB0~7
Is the waveform ok ?
Check U301,U302 LVDS IC
Signal output
Is the waveform ok ?
OK
If MainBoard being replace , please
do the DDC – content reprogrammed
Replace U301,U302 LVDS IC or
replace MAINBOARD.
OK
Содержание ThinkVision L170
Страница 13: ...IBM L170 Service Manual 13 ...
Страница 14: ...IBM L170 Service Manual 14 5 Block Diagram 5 1 Monitor Exploded View ...
Страница 15: ...IBM L170 Service Manual 15 ...
Страница 20: ...IBM L170 Service Manual 20 Power Block Diagram ...
Страница 27: ...IBM L170 Service Manual 27 7 PCB Layout 7 1 Main Board ...
Страница 28: ...IBM L170 Service Manual 28 ...
Страница 29: ...IBM L170 Service Manual 29 7 2 Inverter Power Board ...