LED blinks 1 time
<Trouble Mode and Defective Board>
Trouble Mode
Communication Error
Defective Board
D Board
<How to find the defective boards>
In this case, the defective board is D board only.
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
7
LED blinks 2 times (TH-37PX60, TH-42PD60U, TH-42PX60U\600U)
<Trouble Mode and Defective Board>
Trouble Mode
15V down SOS
Defective Board (Possibility)
P, D, PA, SC, SS Board (P > PA, D, SC, SS)
<How to find the defective boards>
Turn the unit on.
Is there 15V output
at CN P25 pin 1 or 2 before
Shutdown ?
D Board
SC Board
D Board
Yes
No
No
P Board
PA Board
Power SW OFF.
Disconnect CN P25. Is pin 1
or 2 of the socket P25 shorted
to GND?
No
Yes
No
Yes
Turn the unit on.
Does the power LED
blink 2 times?
With the power SW OFF, disconnect
CN SC23, SC20, and SC2. To isolate
the SC board.
With the power SW OFF, disconnect CN P12, SS11, and SS23 (*1)to
isolate the SS board. Remove the jumper at CN SS34 and install it
across pin 8 and 10 of connector P12.
SS Board
No
Turn the unit on.
Does the power LED
blink 2 times?
Yes
With the power SW OFF, disconnect
CN P5. To isolate the PA board
board.
Turn the unit on.
Does the power
LED blink 2 times? The
power LED may blink 12
times.
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
(*1) = Th reference number of
the sustain data connector is
different in some of the models:
TH-42PX600U = SS23
8
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