PDP-R03U
56.
No picture
NO
YES
No TV, video and component picture
Is input at pins (124),
(133) and (139) of IC4
normal?
Check CN6 and its
peripheral circuits.
NO
YES
Are TL207, TL208 and
TL211 normal?
Check CN6 and its
peripheral circuits.
NO
YES
Is digital output section of
IC4 normal?
Check IC4 and its
peripheral circuits.
NO
YES
Is digital output section
of IC310 normal?
Check IC310 and its
peripheral circuits.
NO
YES
Is digital output of IC25
normal?
Check IC25 and its
peripheral circuits.
No PC picture
YES
Is signal at pins (21), (22), (24), (25), (27), (28), (30) and (31)
of IC413? (The signal is of high frequency (a little less than
1GHz). Pay due attention to it during observation.)
Connecting cable or
monitor is problem.
NO
PC I/F Unit (CPCi-
0056CE) internal problem
is likely.
No MAIN picture on single screen and dual screen.
No SUB picture on dual screen
NO
YES
Is input at pins (126),
(136) and (141) of IC4
normal?
Check CN8 and its
peripheral circuits.
NO
YES
Is digital output section
of IC4 normal?
Check IC4 and its
peripheral circuits.
NO
YES
Is digital output of IC25
normal?
Check IC25 and its
peripheral circuits.