Panasonic VIERA TH-50PV500E Service Hints page 12

Trouble Shooting
Power LED
Blink Trouble
LED
4 times
blink
<
:
50"
HD
(TH-50PV500E.B)
>
Power Supply and
Protection
Circuit
Trouble
Mode
and
Defective
Board
Trouble
Mode Defective Board
(Possibility)
Power
SOS
=Vsus, 5V
down
P
,
SC, SS,
D,
SC,SU Board
(
P > SC, SS,
D,
SU, SD)
How
to find the defective
board
No (VSUS NG)
Power
SW
ON.
.VSUS(*1)
output v
^at
P2's
1
or 2 pin
before Shutdown ?
No
>
»
|P
Board
|
Yesjjviow
NG)
Power
SW
ON.
5V
output
at
P25's 7
or 9 pin
'
before
Shutdown
?
^jr
Y
es
|P Boardl
<
Disconnect
SC2
and SS1
1
^ower
SW
ON.
VSUS
output
at
P2's
1
or 2 pin
before Shutdown
? Connect SC2.
Ye^T^ Disconnect
SS11.
No
No(5V NG)
<Power
SW
ON.
VSUS
output
at
SC2's
1
or 2 pin
before
Shutdown ?
Disconnect
SU
and
SD
from
SC
(*2)
After
Power
SW
ON,
No
Elba
flic
=
\C3_
c
—
»
3l| $
Yes
Power comes up ?
I
SC
Boardl
SS
Board
Yes
(
SU
or
SD
NG)
^
Connect
SU
t
No
(D
or
P
or
C
or
Panel NG)
No
(Por
D NG)
J
to
SC,
<Disconnect
SD
from SC(*2)^
After
Power
SW
ON
Power comes
up ?
Yes (Sd|nG)
No
SD
Board
SU
Board
Disconnect
SC20 and SS23.
After
Power
SW
ON,
—
Power comes up ?
Yes (SC
or|
SS
NG)
Disconnect
all
of
D31 ~
D34.
^Disconnect
SC20
(or D20).(*3).
After
Power
SW
ON,
Power comes up ?
^ -^Yes
(C or Panel
NG)
r
-|Keep Disconnect
SC20
(or
D20).|
Power
SW
OFF.
.Disconnect
P25
(or D25),
P25's 7 or
9 pin
Short
with
GND
?
y
Y
es
|p Boardl
No
No
Power
SW
OFF.
Disconnect
P25
(or
D25).
D25's 7
or 9 pin
Short
with
GND
?
Ye
s
I
D Board
I
Ip
Board
I
5V
DET
MC
.
to.701
Vsus
DET
_
Vsus,
Vlow
stop-
Relay
OFF -
0
©
©
©
r*
115
(16)
PANEL MAIN ON
p
(T7)
/OFF
1
(13)
F
STB+14V
ON
/OFF
L
After
Power
SW
ON,
Power
comes
up
?
Yes
(C4 or
C5
or Panel
C2
or
C3
or
Panel
NG)
C3
or
Panel
NG)
or
C6
NG)
Power
SW
OFF
3T
After
Power
SW
ON,
Power comes
up ?
Yes (Cl oijpanel
NG)
Disconnect
all
flexible cables
with Panel from Cl board
No
!
(ex.
50PX500 CA1 ~CA3).
"|
After
Power
SW
ON,
Power comes
up ?
TYe
s
|ci Board|
Panel
Connect D31 and D32. No
In
Addition,
No
in
Addition,
No
(Disconnect D33 and D34)
(C1 o
r
.
Disconnect
CIO
(or
C20). (C2 or
.
Disconnect C21
(or
C31). (C2 or
AI1 --
n
r "
mi
—
P1
"'
AKI
After
Power
SW
ON,
Panel
Power comes
up ?
|sjq)
Yes
(C3
o^anel
NG)
Disconnect
all
flexible cables
with Panel from
C3
board
No
'
(ex.
50PX500 CA8-CA1
1),
After
Power
SW
ON,
Power comes
up
?
TYe
s
[c3 Boardl
Panel
Disconnect
all
flexible
cables
with
Panel from C2
board
No
*
(ex.
50PX500 CA4-CA7).
After
Power
SW
ON,
Power comes
up ?
^Ye
s
Check
Point Location
D3
©
©|
LX4
©
3
IC1104 1
Panel
C2 Board
Disconnect C41 and C44
20pin of IC(*4)
in
C4
Short
with
GND
?
"Y"
Yes
(C4 or Panel
NG)
x
No
(C5 or
C6
or Panel
NG)
Disconnect
C50 and C51
<20pin of IC(*4)
in
C5
Short
with
GND
?
No
Connect SC20.
Disconnect SS44.
After
Power
SW ON
Power comes up ?
VYes
Disconnect
all flexible
cables
No
with
Panel from
C4
board No
< (ex.
50PX500 CB8-CB11).
20pin of IC(*4)
in
C4
Short
with
GND
?
ipYes
[CfTori^^i Yes (C5 olPanel NG)
(C6 or
Panel
NG)
Disconnect
all flexible
cables
with
Panel from C6 board
No
<
(ex.
50PX500 CB1-CB3).
20pin of IC(*4)
in
C6
Short
with
GND
?
^Yes
Disconnect
all
flexible cables
with Panel from
C5
board
No
< (ex.
50PX500 CB4-CB7).
20pin of IC(*4)
in
C5
Short
with
GND
?
^TVes
C6 Board Panel
|
(*1)
VSUS
about
180V
(Accurate voltage
is
described
in
Panel Label on the chassis)
|
|(*2)
Be
careful that disconnected
SU
or
SD
board doesn't touch
SC
board.
|(*3)
The reason
of disconnect
SC20
is
to prevent 6 times
SOS
caused by disconnect
D3T
~D34,|
|_
SS
Board
SC
Board C4
Board
Panel C5 Board
Panel
(*4)Check one
of the following 1C.
1C
in
C4
1C
in
C5
1C
in
C6
IC7401 or IC7402 or IC7403 or IC7404 or IC7405
IC7501
or
IC7502
or
IC7503
or
IC7504
or
IC7505
IC7302 or IC7303 or IC7304 or IC7306
SU
:sd
Cl |C1o]|c20|
C2
|C2l] |C3l)
C3
SC
SC20
IpsiFjps
7
PB
Jd34|_|d33|
P2
SS2
(PV50
XV
OB ONLY)
PA
DV
|ssn|
SS
TA
|SS44
fl
SS3
lC60||C50|
C5~
SD
MODULE
GS
1C5l] [C4l]
C4 9
E=Hz=K=H=t
GK
12