Panasonic TH-50PV500E Manual de servicio

Order NO.ITD0509057BE

Service Hints

Plasma Television

vie r*

<500/50 Series> TH-50/42/37PV500E

TH-50/42/37PV500B

TH-42/37PA50E

TH-42/37PE50B

Trouble Shooting for Power Supply Ver

This service hint is published for technicians and engineers for repair.

And it gives you the information how to judge the defective board

of PDP.

Please file and use this Service Hints together with the main service

manual and other publications related to models.

AWARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service aproduct.

Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service

or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

rights reserved. Unauthorized copying and distribution

is aviolation of law.

-CONTENTS \

Circuit Operator!

Power Supply P03

Protection Circuit P05

Trouble Shooting

1.Introduction P07

Power LED No Lit P08

Power LED Blink

LED 2,3 times blink P09

LED 4times blink (TH-37PA50E.PE50B)— P10

(TH-42PA50E,PE50B)

(TH-37PV500E.B) —P11

(TH-42PV500E.B)

(TH-50PV500E.B) —P12

LED 5times blink (TH-37PA50E,PE50B)~- P13

(TH-42PA50E.PE50B)

(TH-37PV500E,B) —P14

(TH-42PV500E,B)

(TH-50PV500E,B) —P15

LED 6times blink (TH-37PA50E.PE50B) —P16

(TH-42PA50E,PE50B)

(TH-37PV500E.B)

(TH-42PV500E.B)

(TH-50PV500E.B) —P17

LED 7times blink (TH-37PA50E.PE50B)— P18

(TH-42PA50E,PE50B)

(TH-37PV500E,B)

(TH-42PV500E,B)

(TH-50PV500E,B) —P19

LED 8times blink —P20

LED 10 times blink (TH-37PA50E,PE50B) —P21

(TH-42PA50E,PE50B)

(TH-37PV500E.B) —P22

(TH-42PV500E.B)

(TH-50PV500E.B)

LED 11,12 times blink P23

Power Supply <TH-50/42PV500E>

<TH-50/42PV500B>

P Board Power Supply Outline

P Board Primary Circuit

P Board Secondary Circuit

PA&PB Board Regulator Circuit

PA-BOARD

FSTB

PA10

NR14V IC5602

3.3V/5V

Q5606

3.3V Main 3.3V

t—TunerMAIN ON/OFF

—Sub 3.3V

—*Main 5V

Q5603

t—Tuner_MAIN ON/OFF

Sub 5V 2

PB-BOARD

+12Vs(W)

+12Vs(S)

10Vs(W)

9Vs(w)

To SS11

To SS12

To PA10

FOR

FAN

Power Supply <TH-37/42PA50E> <TH-37PV500E>

<TH-37/42PE50B> <TH-37PV500B>

P Board Power Supply Outline

P Board Primary Circuit

P Board Secondary Circuit

PA&PB Board Regulator Circuit

Protection Protection Circuit Operation

Power LED Blink Mode

LED Blinking

times Trouble Mode Defective Board (Example)

ist mimproved 37/42PA50E.PE50B |37/42PV500E,B| 50PV500E.B

1IIC communication NG Unknown (D)

212V down SOS P, D

33.3V down SOS D

4Power SOS

(Vsus, 5V down) P

5P5V SOS D, P, C, SC, SS, Panel (1C)

6SCAN Driver SOS(37”,42”)

+SC Floatinq Volt. (50”)

SC, SS, D, P

(SC Enerqv recovery)

SC, SU, SD, SS, D, P

(SC Enerqy recovery/ floatinq volt.)

7SC Floating Volt.(37”,42”)

DATA Driver SOS (50”)

SC, SU, SD, D, P

(SC floating volt.)

SS, D, C, P

(SS Data Energy recovery)

8SUS Driver SOS SS, SC, D, P(SS Energy recovery )

9Soft-Ver. Combination NG D

10 Tuner Power SOS PA, P, H,

DG, Z, TA, XV(*2) PA, P, H, DG, GS, Z, TA, DV, XV(*2)

ii Fan SOS PB, FAN

12 Sound SOS PB, Z, H

LED Blinking signal

\*—!

1.0s 3.0s

Note

(* 1)

2-9 times LED blinking become to 1time in 1st design.

So, when 1time LED Blinking is found, please check SOS signal

that is input to IC9003, in order to know true LED blinking time.

Check point is the connector’s pin or IC9003’s pin as shown in the

following table.

When SOS signal is found, please refer to the flow chart of its

trouble mode that the SOS signal indicates.

(*2)

XV board PE50B, PV500B only.

Check point in the case of 1time blink

LED Check Point location Check output

Blinking Trouble Mode connector No. /Pin No. IC9003 (D board) SOS

actual true input port No. signal

212V down SOS —-(R9047 in Dboard) IC9003_95 L:SOS

33.3V down SOS .... (R9007 in Dboard) IC9003_94 L:SOS

4Power SOS D25 or P25 /16pin IC9003_98 H:SOS

15P5V SOS —-(R9048 in Dboard) IC9003_93 L:SOS

6SCAN Driver SOS(37”,42”)

+SC Floating Volt. (50”) D20 or SC20 /11 pin IC900392 H:SOS

7SC Floating Volt.(37”,42”)

DATA Driver SOS (50”)

D20 or SC20 /12pin (37”/42”)

SS44 or C44 /19pin (50”) IC900399 H:SOS

8SUS Driver SOS SS23 or C23 /9pin (37”)

SS32 or C32 /9pin (42”)

SS44 or C44 /9pin (50”)

IC900397 H:SOS

Panel SOS LED 1-8 times blink <TH-37/42PA50E,PE50B>

Panel SOS LED 1-8 times blink <TH-37/42PV500E,B>

SC Board DBoard

Protection FAN SOS LED 11 times blink

PB Board DG Board

Sound SOS LED 12 times blink

Introduction

Introduction of Power Trouble Shooting

1.These are following 2states of Power LED in Power Trouble

A. No Lit (Relay doesn’t work)

B. Blinking several times

2, Basic Idea of how to find the defective block

A. Check if the voltage comes up

Normally, when Power ON, shut down occurs immediately.

So, check is necessary before shutdown.

B. Check if power comes up, when disconnecting the board which seems to be defective.

If power comes up (*) when disconnecting aboard,

the board is defective. (*) “Power comes up” means “no shutdown”.

Adjustment after P.C.B. exchange

When exchange the following boards, voltage adjustment is necessary.

Please refer to Service Manual. „_———

P.C.B VoltageVoltage

Pboard VsusVsus

SC board Vad

SS board Ve

Trouble Shooting Power LED No Lit Trouble

Trouble status and Defective Block

Power LED Status (cause) Defective Block

No Lit (STB 5V NG) AC Power Code or PBoard (or other Boards)

How to find the defective board

with GND? with GND?

Yes

HBoard

Yes

GBoard

STB 5V Power Supply

50series

|STB 5V|

FUSE

1,4k/'!>-10-10

0MICOM

IC9003

1—I

MICOM

IC1104

DG|

[H]

253

27 ?

251

27 33

Check Point Location e.g. 42PV500E,B

Power

2-LED

—Power

2*LED

Trouble Shooting

LED 2times blink

Trouble Mode and Defective Board

Trouble Mode Defective Board (Possibility)

12V down SOS P, D, PB Board (P>D, PB )

How to find the defective board

Power SW ON.

<12V output >

at P25’s (or D25’s) 1or 2pin^

before Shutdown ?

Jves

DBoard

No Power SW OFF.

^Disconnect P25 (or D25).'

^P25’s 1or 2pin Short

with GND ?

Yes

Power SW OFF.

;w OFF.

^Disconnect P5 (or PB5).

^P5's 6or 7or 8pin Shorr^"

with GND ?

Yes

PBoard

Power SW OFF.

^Disconnect P25 (or D25).'-

^D25’s 1or 2pin Short

with GND ?

PB Board

Xyos

DBoard PBoard

Power Supply and Protection Circuit

r+12V-

Vsus, Vlow stop

Relay OFF

D3 (X

DG @

•-*

IC1104 —

LED 3times blink

Trouble Mode and Defective Board

Trouble Mode Defective Board

3.3V down SOS DBoard

How to find the defective board

The defective board is Dboard ONLY.

Power Supply and Protection Circuit

Trouble Shooting Power LED Blink Trouble

LED 4times blink <37”,42” SD (TH-37/42PA50E,PE50B) >

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) ^

Disconnect SC2 and SS1

..Power SW ON.

"VSUS output at P2’s 1or 2pin

before Shutdown ?

Power SW ON.

-VSUS(*1) output N

at P2’s 1or 2pin x

before Shutdown ?

No^

.>»Ip Boardl

in i1

Yes (Vlow NG)

Power SW ON.

/5V output

^at P25’s 7or 9pin

before Shutdown ?

jYes

|P Boardl

No(5V NG)

Yes /s.

Connect SC2.

Disconnect SS11.

LXPower SW ON.

VSUS output at SC2’s 1or 2pin

before Shutdown ?

^Yes

|SS Boardl

No Disconnect

SU and SD from SC (

After Power SW ON,

Power comes up ?

>2). No

Yes (Su|>r SD NG)

Connect SU to SC.

SC Board

No (D or Por Cor Panel NG) No (Por DNG)

Disconnect SD from SC(*2).

After Power SW ON

Power comes up ?

Yes (SpjfJG)

Disconnect SC20 and SS23

<After Power SW ON,

Power comes up ?

Yes

(SC or SS NG) JT

Disconnect D33 and D34.

.Disconnect SC20 (or D20).(*3)>_

After Power SW ON,

Power comes up ?

Yes (C or Panel NG)|^

Power SW OFF.

disconnect P25 (or D25)..

P25’s 7or 9pin Short

with GND ?

Yves

[SD Board]

SU Board

PBoard

Disconnect SC20 (or D20). No

Connect D34. (Disconnect D33) (Cl or

After Power SW ON, Panel

Power comes up ?

Ye^C2 or Panel NG)

Power SW OFF. No i*<:

Disconnect all flexible cables

<CB1~CB3 from Cl board. >-~*]Panel

20pin of IC(*4) in Cl Short

with GND ?

Power SW OFF. No

Disconnect P25 (or D25).-^

D25’s 7 or 9pin Short

with GND ?

Tyss

DBoard PBoard

Yes

Power SW OFF.

Disconnect all flexible cables 1

<CB4~CB7 from C2 board. ^—I Panel I

20pin of IC(*4) in C2 Short

with GND ?

Cl Board

Yes

C2 Board (*1) VSUS about 180V (Accurate voltage is described in Panel Label on the chassis)

Connect SC20.

Disconnect SS23.

After Power SW ON,

Power comes up ?

Yes

(*2) Be careful that disconnected SU or SD board doesn’t touch SC board.

N°i ,

>-fr|SC Board] (*3) The reason of disconnect SC20 is to prevent 6times SOS

caused by disconnect D33 and D34.

SS Board

(*4)Check one of the following 1C.

1C in Cl board :IC7101 or IC7104 or IC7105 or IC7106

1C in C2 board :IC7201 or IC7202 or IC7203 or IC7204

4Power Supply and Protection Circuit

Check Point Location

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