PT-VW350, PT-VW350D, PT-VW350T, PT-VX420, PT-VX420D, PT-VX420T, PT-VX421 (serv.man4) - Panasonic Projector Service Manual (repair manual). Page 33

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INF-23
SECTION 1 SERVICE INFORMATION
■ HDMI input check 
■ COMPONENT input check 
A
Check the waveform at IC8001 surrounding circuit
NG
A
Check IC8001 and peripheral circuits
Check the waveform at each pin of connector [K10A]
NG
A
Check connector [K10A] and peripheral circuits
A
Check the sync input waveform at R344, R347, R353, R2807
 
A
Check R344, R347, R353, R2807 and peripheral circuits
A
Check microprocessor (IC301) and peripheral circuits
A
Check microprocessor (IC301) and peripheral circuits
One of the inputs (VIDEO, S-VIDOE, RGB1, RGB2, COMPO-
NENT) can be displayed
NG
One of the inputs (VIDEO, S-VIDEO, RGB1, RGB2, HDMI) can 
be displayed
NG
(3)
(3)
OK
OK
OK
OK
OK
■ S-VIDEO input check 
A
Check the cable between [A]-P.C.Board and [K300]
NG
A
Replace cable
A
Check the waveform at pin (4) of connector [K20B]
NG
J
Replace [J]-P.C.Board
A
Check microprocessor (IC301) and peripheral circuits
One of the inputs (VIDEO, HDMI, RGB1, RGB2, COMPONENT) 
can be displayed
NG
(3)
OK
OK
OK
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