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LC-R60HDU
TROUBLE SHOOTING TABLE
Component signal input
being received
Are there input signals to
IC4001 at the following pins:
(3) thru (5) at COMP 1, (9)
thru (11) at COMP 2, (13)
thru (17) at COMP 3, and
(21) thru (23) at COMP 4?
YES
Are there output signals at
pins (76), (77), (78), (79)
and (80) of IC4001?
YES
Are there output signals at
C4177, C4178 and C4179?
YES
Are there output signals at
pins (26) and (27) of IC4021?
YES
Go to "Checking sync signal
with component input".
Are there input signals (sync
signal) at TP4020 and TP4019?
YES
Are there output signals at
TP4031 and TP4021?
YES
END
Checking main signal input circuit
NO
NO
Check input terminal board.
NO
Check IC4001 and its
peripheral circuits.
NO
(With 525P input signal)
Check IC4006 and its
peripheral circuits.
(With 525i input signal)
Check IC4008, IC4009, IC4010,
IC4012, IC4013, IC4014 and
their peripheral circuits.
YES
Check IC4016, IC4017 and
their peripheral circuits.
NO
Check IC4001 and its
peripheral circuits.
NO
Check IC4027, IC4028, IC4031,
IC4002, IC4003, IC4004 and
their peripheral circuits.
38
(Continued)
Video / S signal input being
received
Are there input signals to
IC4002 at the following pins:
(1) thru (7) at VIDEO 1, (8)
thru (14) at VIDEO 2, and
(15) thru (21) at VIDEO 3?
YES
Are there output signals at
pins (56) and (58) of
IC4002?
YES
Is there output signal at
C4061?
YES
NO
Check IC4002 and its
peripheral circuits.
NO
Check IC4011, IC4015 and
their peripheral circuits.
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