No video output (4)
External input in trouble <Video 1>
Is Video 1 selected in the input switching
menu screen?
Are there digital video signal outputs at
each output pin (AD_***) of IC3700 (ADC)?
Are there digital video signal inputs at pins (51) thru (78) and (7) thru (10) of IC3201? (Signal pins only)
Are there digital video signal outputs at pins (39) thru (49) of IC3201? (Signal pins only)
Are there digital video signal outputs at pins (3) thru (16) of SC3200? (Signal pins only)
Are there main video signal outputs at pins (46), (48) and (50) of IC3801, sub video signal outputs at pins (40), (42) and (44)
, and pass video signal
outputs at pins (34), (36) and (38)?
<Component video signal input>
Are there signal inputs at pins (53), (55)
and (57)?
Is there signal input at each input pin of
IC3801 (CHROM SWITCH)?
Select Video 1 and the input signal in the input
switching menu screen.
If signal name is in gray and not selectable
in the menu screen.
Check between pins (7), (14) and (20) of
J1103 and each input pin of IC3800.
Is Component signals detection functioning
normally? Check between J1103 and pin
(30) of SC3802.
Is there signal input at each input pin of
IC3700 (ADC)?
Are there signal inputs at pins (5), (13) and
(20)?
Check IC3700 (ADC) and its peripheral
circuits.
Check between IC3703 and IC3700.
External input in trouble <Video 2>
YES
NO
NO
Is Video 2 selected in the input switching
menu screen?
<Component signal input>
Are there signal inputs at pins (5), (7), (9)?
Is there signal input at each input pin of
IC3801 (CHROM SWITCH)?
Select Video 2 and the input signal in the input
switching menu screen.
If signal name is in gray and not selectable
in the menu screen
Check between pins (3), (6), (9), of J1105
and each input pin of IC3801.
Is Component signals detection functioning
normally? Check between J1105 and pin
(76) of IC3800.
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
Check between IC501 and IC500.
NO
NO
Are there digital video signal outputs at pins
(43), (44), (46), (47), (48), (49), (54), (55)
and (58) of IC500?
Check IC500 and its peripheral circuits.
NO
Replace the main PWB, or check between
IC3700/IC500 and IC3201.
NO
Check IC3201 (LV DSTx) and its peripheral
circuits.
Check between IC3201 and SC3200.
NO
NO
Check IC3801 (CHROM SWITCH) and its
peripheral circuits.
NO
<Main Video Signal> Are there pass signal inputs at pins (1), (5) and (25) of IC3703?
<Sub Video Signal (525I)> Are there sub signal inputs at pins (8), (10) and (13) of IC501?
Check between IC3801 and IC3703, and
between IC3801 and IC501.
NO
No problem up to the main PWB. Check TMDS PWB.
<Component video signal> input
<Main Video Signal>
Is there signal input at each input pin of
IC500 (SUB VIDEO DEC)?
<Sub video signal input>
Are there signal inputs at pins (85), (92)
and (94)?
<Sub Video Signal (525I)>
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