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Trouble Shooting
Power LED
Blink
Trouble
LED
10 times
blink <TH-42PD50U, 37PX50U, 42PX50U,
50PX50U>
Trouble
Mode
and
Defective
Board
Trouble
Mode
Defective
Board
(Possibility)
Tuner
Power
SOS
PA,
P,
other
Boards
(
PA,
P
> other Boards]
How
to find
the defective
board
When
Power
SW
ON,
DC14V
output
No(14V NG)
at
PAIO's
(or
PIO's)
1
or
2 or 3
pin
before
Shutdown
?
Yes
(MAIN
or
SUB
Voltage
NG)
Disconnect PA10.
,Power
SW
ON.
'DC14V
output
at
PIO's
1
or
2
or 3
pin
Before
Shutdown
?
^^J^Yes
|
PA
Board
|
No
>-
HP
Board
Disconnect
PA30
or
H30.
<After
Power
SW
ON,
Power comes
up
?
No
,(PA
or
DG
or
DT
or
DV
NG)
Yes
(H
or
Z NG)
Connect PA30-H30.
No
Remove DT
and
DV
Boards
After
Power
SW
ON,
Power
comes
up
?
Yes
(DT
or
DV
NG)
No
Remove
DG
board.
<DG20's
following pins(*)>-*Jp
A
Board
|
Short
with
GND
?
Yes
DG
Board
Remove
DV
Board.
Jnstall
DT
Board.
^
Softer
Power
SW
ON,^
Power comes
up
?
No
iDT
Board
Disconnect
H50
or
Z50,
After
Power
SW
ON,
^
Power comes
up ?
|DV
Board!
XYes
|Z
Board!
|H
Board!
(*)
Check DG20's
Pin
Number
Pin
No. Voltage (Normal
Condition)
7
MAIN5V
9
SUB5V
12
MAIN2.5V
13
MAIN2.5V
15
MAIN9V
17
SUB9V
18
SUB9V
20
SUB3.3V
22
MAIN3.3V
23
MAIN3.3V
25
BT30V
Power
Supply and
Protection
Circuit
Check
Point Location
e.g
42PX50U
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