PG-C30XE (serv.man4). Contents, Removing of major parts, Resetting the total lamp timer, The optical unit outline, Covergence and focus adjustment, Electrical adjustment, Adjusting hte PC interface, and Troubleshooting table - Page 1-43 - Sharp Projector Service Manual (repair manual). Page 40

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40
PG-C30XE
Yes
Yes
No
No
Is there signal at pin (139) of IC8606?
Is there signal at pin (139) of IC8606?
output PWB faulty.
B
B
Yes
Yes
No
No
Are there signals at pins (21), (22), 
(24) thru (28) and (34) thru (41) of 
IC8606?
Are there signals at pins (21), (22), 
(24) thru (28) and (34) thru (41) of 
IC8606?
IC8606 or its peripheral circuit faulty.
Yes
Yes
Yes
Yes
Yes
No
No
Are there signals at TL8044 and 
TL8046?
Is there signal at TL8612?
Are there signals at pins (112) thru 
(119) of IC8020?
IC8025 or its peripheral circuit faulty.
No
Are there signals at pins (67) thru (73) 
and (189) thru (192) of IC8020?
IC8020 or its peripheral circuit faulty.
Are there signals at pins (1) thru (9) of 
IC8051?
CON4 (P8405), IC8051 or their 
peripheral parts faulty.
No
IC8609 or its peripheral circuit faulty.
output PWB faulty.
No
IC8029 or its peripheral circuit faulty.
Checking the S-
XGA's red video 
circuit and its 
peripheral circuits
Checking the VGA's 
red video circuit and 
its peripheral  
circuits
Yes
No
Is there signal at pin (27) of CON2 
(P8404) connector?
Check the video 
system's red video 
circuit and its 
peripheral circuits
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-3
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