15” LCD Color Monitor Sharp LL-153A
31
4. U4-DATA OUTPUT
8.2.2 Keypad Board
Measured DCLK(pin 65,66 from U401)
DVS, DHS (pin 63,64 from U401 )
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)
OK
Replace TSUM13AK (U401) or
replace Main board.
Check TSUM13AK(U401)
Signal output (PIN105-114, 118-127)
Is the waveform ok ?
OK
If Main Board being replace, please
do the DDC – content reprogrammed
OK
NG , no transition
OSD is unstable or not working
Is Key Pad Board connecting normally?
Connect Key Pad Board
Is Button Switch normally?
Replace Button Switch
Y
N
N
Is Key Pad Board normally?
Replace Key Pad Board
Y
N
Y
Check main board
Содержание LL-153A
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Страница 25: ...15 LCD Color Monitor Sharp LL 153A 25 7 PCB Layout 7 1 Main Board ...
Страница 26: ...15 LCD Color Monitor Sharp LL 153A 26 7 2 PWPC Board ...
Страница 27: ...15 LCD Color Monitor Sharp LL 153A 27 7 3 Audio Board 715G1144 3 SH ...
Страница 36: ...15 LCD Color Monitor Sharp LL 153A 36 10 Monitor Exploded View ...