LG FLATRON L2320A Service Manual page 17

NO RASTER ON AV SIGNAL
(CVBS, S-VIDEO, DVD Y/Pb/Pr)
Repeat
'A' Process
Pass
Check
Digital Switch for AV
(Main B'd : U16)
Pass
Check
U601(VPC3230D)
*In/Out H/V Sync
*Output Data
*Input Signal
Pass
Check
U302(FLI2310)
*S2310-RESET
*In/Out H/V Sync
*Output Data
Pass
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Only for training and service purposes
Resoldering
Fail
Or Replace
Device
*Check the Power
Fail
(5VA, 3.3VDD)
*Replace Device
*Check the Power
Fail
:U303, U304
*Replace Device
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NO RASTER ON TV SIGNAL
Check
The connection
Between AV B'd
And Tuner B'd
High
Check
Power(AV B'd)
*L702(5V)
*D802(33V)
Pass
Check
Tuner Output
*L701(TV-VIF)
Pass
Check the Input Jack and Cable
Replace Device
Low
. Main B'd: U9
. AV B'd: U702
Replace Device
Fail
. Main B'd:
U201, U9
*Check Connector
Fail
*Check Ctrl Signal
(INVT-CTL/LCM-CTL
/LCM-PWR)
LGE Internal Use Only