CT-34WDM60 - Panasonic TV Service Manual (repair manual). Page 11

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Main power/video reception LED flashes four times
When the main power switch is
set to ON, the main power/video
reception LED lights in the order of
red -> green -> red
and flashes four times.
Perform
a continuity check
between pins 7 and 8 of the connector
E12 and earth, and check
for a short-circuit.
Unsolder
pins7 and 8 of the
connector E12, perform
a continuity check between pins
7 and 8 of the connector D12
and earth, and check for
a short-circuit.
Perform
a continuity check
between collectorand emitter
of Q551, and check
for a short-circuit.
D861, C861 short-circuit inspection
IC881 open inspection
C958 short-circuit inspection
Exchange
Q500 short-circuit inspection
Exchange
Q551 short-circuit inspection
D509 short-circuit inspection
Exchange
Perform
a continuity check
between pins 3 and 4 of the connector
E14 and earth, and check for
a short-circuit.
Perform
a continuity check
between pin 8 of the connector
E13 and earth, and check for
a short-circuit.
Unsolder
pins 3 and 4 of the
connector E14, perform
a continuity check between pins
3 and 4 of the connector D14
and earth, and check for
a short-circuit.
IC2301, D3016, C3009
short-circuit inspection
Exchange
D867 short-circuit inspection
Exchange
D866 short-circuit inspection
Exchange
Unsolder
pin 8 of the connector
E13, perform a continuity check
between pin 8 of the connector D13
and earth, and check for
a short-circuit.
IC451, C654, C626 short-circuit inspection
Q623 short-circuit inspection
Simultaneous exchange
Short-circuit
Short-circuit
Short-circuit
Short-circuit
Short-circuit
Short-circuit
Short-
circuit
No short-circuit
No short-circuit
No short-circuit
No short-circuit
No short-circuit
No short-circuit
No short-circuit
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