Sanyo PLV-Z3 - No Picture; No picture with all of input sources; No picture with COMPONENT1;2 (YCbCr 480 i,575 i) input sources; No picture with HDMI (RGB digital) input source

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Troubleshooting
● 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 TP35R, TP35G, TP35B.
Check power supply circuit 15V and peripheral circuit.
Check IC501, IC531, IC561, IC9401, IC401, IC301 and peripheral circuits.
No picture with
COMPONENT1/2 (YCbCr
480i,575i) input sources
Check Component source input stage;
Check YCbCr signals at test points TP-RIN/GIN/BIN.
Check IC6201, IC3101, IC4101, IC8201 and peripheral circuits.
Check sync signals at test points TPGHS and TPGVS.
No picture with
HDMI (RGB digital)
input source
Go to next page
Yes
Yes
Yes
No
No
No
Check following steps.
SG: Digital RGB signals from IC8001 are sent to IC301, and the other signals
are A/D converted in IC8201 and sent to IC301. They are scaled in
IC301. After correcting for picture quality in IC9401 and IC401, they are
sent to IC501, IC531, IC561(sampling & holding, D/A conversion).
Sync: DHS,DVS,DCLK from IC301.
SG: Component_1/2 signals are selected in IC6201, with COMP_1/2 signal
(Component_1 = Low). The selected signals "15K_YCbCr signal" are
sent to IC3101 - IC4101 - IC8201. They are A/D-converted in IC8201 and
sent to IC301.
Sync: SYNC_Y signal from IC6201 is sent to IC6301, sync-separated in IC6301.
GHS and GVS signals are sent to IC8201 via IC5361.
No picture with
COMPONENT1/2 (YCbCr
except for 480i,575i)
input sources
Check Component source input stage;
Check YCbCr signals at test points TP-RIN/GIN/BIN.
Check IC6201, IC4101, IC8201 and peripheral circuits.
Check sync signals at test points TPGHS and TPGVS.
Yes
No
SG: Component_1/2 signals are selected in IC6201, with COMP_1/2 signal
(Component_1 = Low). The selected signals "30K_YCbCr signal" are
sent to IC4101 - IC8201. They are A/D-converted in IC8201 and sent to
IC301.
Sync: SYNC_Y signal from IC6201 is sent to IC6301, sync-separated in IC6301.
GHS and GVS signals are sent to IC8201 via IC5361.
Check HDMI (RGB digital) source input stage;
Check IC8001 and peripheral circuits.
Check sync signals SIHS and SIVS.
Check 5VHDMI power supply line.
SG: TMDS data signals are converted to RGB digital signals in IC8001, then
sent to IC301.
Receiving video content encrypted with HDCP(High-bandwidth Digital
Content Protection), IC8001 reads the HDCP keys and it allows the signal
processing.
Sync: SIHS and SIVS signals from IC8001 are sent to IC301.
SG: Description of visual signal flow
Sync: Description of Sync signal flow