User Manual

Troubleshooting
-96-
● No Picture
No picture with all of
input sources
Check signal processing stage and LCD driving stage;
Check RGB S&H signals at test points TPPANELR, TPPANELG, TPPANELB.
Check power supply circuit 15.5V and peripheral circuit.
Check IC501, IC1501, IC2501, IC9401, IC401, IC5500 and peripheral circuits.
Ye s
No picture with HDMI
input source
Ye s
No
No
Check following steps.
Ye s
No
Check HDMI source input stage;
Check IC5500 and peripheral circuits.
Check TMDS data signals "HDMI_*".
No On-Screen-Display
(OSD MENU)
Ye s
No
Check OSD processing stage;
Check IC5500 and peripheral circuits.
Check LVDS signals at connector "K8C".
Check test points "TPDE*" around IC5201.
Check test points "TP_O*" around IC9401.
Check signals "R/G/B_OUT_*" around IC401.
Check Digital-TV source input stage;
Check IC6100 and peripheral circuits.
Check IF signals from 20 and 21 pin of A6120.
Check serial data at TPDATA* and TPCLK.
No picture with Digital-
TV input source
No
Ye s
No picture with
COMPONENT _2/3
(Y,Pb,Pr) input sources
Check Component source input stage;
Check YCbCr signals. (ex. Y-signal at test point TE6207)
Check IC6200 and peripheral circuits.
No picture with S-VIDEO
input source
No picture with VIDEO
input source
No picture with TV input
source
No
Ye s
No
Check AV source input stage;
Check Y/C signals at IC4001, TE5802 and peripheral circuits.
Ye s
Check TV source processing stage;
Check composite video signal at TPTV and peripheral circuits.
Ye s
Check AV source input stage;
Check composite signal at IC4001, TE5801 and peripheral circuits.