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Panasonic Manuals
Plasma TV
TH-50PV500E
Service hints
Panasonic VIERA TH-50PV500E Service Hints page 17
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Also See for VIERA TH-50PV500E
:
Operating instructions manual
(48 pages)
,
Service manual
(189 pages)
,
Operating instructions manual
(48 pages)
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Trouble Shooting
Power LED
Blink
Trouble
LED
6
times
blink
< 50"
(TH-50PV500E,B)
>
Trouble
Mode
and
Defective
Board
Trouble
Mode
Defective
Board
(Possibility)
SC
Floatinq
Voltaqe
SC. SS,
D,
P Board
<?n
•»
^
n
p\
SC
Enerqv Recovery
SC,
SU, SD,
D,
P Board
&U
'
bD
5,5,1
Ul P)
How
to find
the defective
board
No (VSUS NG)
Power
SW
ON.
Disconnect SC2.(*2)
VSUS(*1
)
output
Power
SW
ON.
'at P2's(or
SC2's)
1
or 2
pin
VSUS
output
at
P2's
1
or 2
pin'
before
Shutdown
?
before
Shutdown
?
No
Yes(
SC
or S
Disconnect
K
SU
and
SD
from
SC
(*3).
?
<
After
Power
SW
ON,
Power comes
up
?
Floating Volt
NG
C
Control
Pulse
NG)
No
(SC
or
D
or
P NG)
^Tes
SC
Board
Disconnect
SC2
and SS1
1
.(*2)
Power
SW
ON.
VSUS
output
at
P2's
1
or
2
pin
before
Shutdown
?
|SS
Boardl
No
P
Board
Connect
SU
and
SD
to
SC.
Power
SW
ON.
^DC15V
output
s
x
at
TP15V
on
SC
"
before
Shutdown
?
No(15V NG)
No
Disconnect
P23
(or
SC23).
^Power
SW
ON.
"DC15V
output
at
P23's
1
or
2
pin
>
before
Shutdown
?
Yes
(
Sljlor
SD
NG)
Connect
SU
to
SC.
Disconnect
SD
from
SC(*3).
No
After
Power
SW
ON,
^
Power comes
up
?
|SU
Boardl
X
es
Yes
(VSCN
or
VAD
oij^SC
Control
Pulse
NG)
Power
SW
ON.
^^Output
at
TPVSCN
on
SC
and-
"Output
at
TPVAD
on
SC
OK
before
Shutdown
?
(*4)
P Board
£Yes (SD
NG)
Connect
SD
to
SC.
.Disconnect
SU
from
SC(*3).
After
Power
SW
ON,
+
Ye^SC
Control
Pulse
NG)
Disconnect
SC20.
n
0
<(Then Power comes
up)
Output
at
D20's
1
,4,6
pin
OK
?
(*5)
r
Yes
No
SD
Board
Power comes
up
'
Yes
(SqControl
Pulse
NG)
Connect
SU
and
SD
to
SC.
Disconnect
SC20.
<
Power
SW
ON.
(Then
Power comes
up)
Output
at
D20's
1,17,18,19,20
pin
OK
?
(*6)
+
Yes
I
SC
Boardl
No
|
,
^
|D Board!
(*1)
VSUS
about
180V
(Accurate voltage
is
described
in
Panel Label
on
the chassis)
(*2)
CAUTION
Before connecting
SC2
or
SS1
1
after
these
are disconnected,
discharge
is
necessary
to
prevent
potential
shock caused by
VSUS.
(*3)
Be
careful that
disconnected
SU
or
SD
board
doesn't touch
SC
board.
(*4)Check
(*5)Check
(*6)Check
Test
Point.
:
Output
Pin
No.
:
Output
Pin
No.
:
Output
TPVSCN
:
about
30-40V
1
:5V(DC)
1
:
5V(DC)
TPVAD
:
about
A90V
4,
6
:5V(PULSE)
—
need
oscilloscope
17, 18, 19,
20
:5V(PULSE)—
need
oscilloscope
Power
Supply and
Protection
Circuit
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