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TROUBLESHOOTING FLOW CHARTS
[Terminal PWB circuit tro
uble shooting]
No picture, no color or dark
Analog format signal
NTSC, composite, s, component
Are waveforms at
Q013-E(Y), Q012-E(PB) and Q011-E(PR)
OK?
No
Component video input
Composite video input
Are waveforms at
pin73/67(Y), 71/65(PB) 69/63(PR)
pin10/22/53(CV) pin14(Y), 12(C)
of I001 OK?
No
Check Input terminal
Follow next procedure:
(1) Select 'Maintenance' of Adjustment mode menu.
(2) Press SELECT. (while '<Display>' at "Front End" lights yellow.)
(3) Check the indication of 'Frame/MPEG Lock' line.
Is the indication
Check UT01 (Tuner)
Yes
Check Main-Digital board
Yes
Check I001
Check UT01 (Tuner)
A
Yes
Check Main-Digital board
[LOCK] ?
No
Digital format signal
HDMI
Cable/Air
Are waveform at
Yes
pin26(CV) of I001 OK?
No
Are waveforms at
Yes
pin 9(SDA), 10(SCL) and
voltage at pin 2/7/18/20(+5V)
of UT01 OK?
No
Check IT06, IT07
or Main-Digital board
56
DW3U
Cable/Air
A
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