Panasonic TC-P42S2 Technical Guide

2010 Plasma TV Technical Guide

2010-Plasma FHD TV – S2 Series (13

Applies to models:

TC-P42S2

th

Generation)

Panasonic National Training

Panasonic Service and Technology Company

TTG100218CP

Prepared by N. Kuge, J. Mizukami, and

Cesar Perdomo.

Edited by Cesar Perdomo

"HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.“

Copyright © 2010 by Panasonic
All rights reserved. Unauthorized copying and distribution is a violation of law.

Warning
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 a product. 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.

Slide 2

Table of Content

Subject Slide

Table of Contents
Features 5
Series Line up 6
New Features 7
Specifications 8-10
Model Comparison 11
2009/2010 Models Comparison 12-13
Connectors Location (TC-P42S2) 14
Boards Description 15
TC-P42S2 (FHD Model) 16
Technical Changes 17
Start-up Operation 18
Standby/Power On 19
Standby Operation 20
Power On Operation 21
Power On Circuit Explanation 22
CPU Commands Explanation 23
Supply Voltages (SUB Voltages) For Video Processing Circuit 24-28
Overview of Voltage Distribution 29-31
Troubleshooting “No Power” Symptom 32
Signal Processing 33
Signal Process Circuit Comparison between 2009 and 2010 34
Signal Process Circuit 35
Signal Process Circuit Explanation 36
Audio Signal Processing Circuit 37
SOS Detect (Shutdown) 38
Protection circuit block diagram 39
Power LED Error Code Definition 40-41
SOS Detect Circuit 42-43
Panel Drive SOS Detect Block Diagram 44
SOS Detect Circuit 45-46
1 Blink Error Code 47
Troubleshooting 1 Blink Failure 48
2 Blinks Error Code 49

4 Blinks Error Code 56-57
Troubleshooting 4 Blinks Failure (Flowchart) 58
5 Blinks Error Code 59
Troubleshooting 5 Blinks Failure 60-61
Troubleshooting 5 Blinks Failure (Flowchart) 62
6 Blinks Error Code 63
6 Blinks Error Code Circuit Explanation 64
P15V and P5V Test Points (SC Board) 65
Troubleshooting 6 Blinks Failure (Flowchart) 66
7 Blinks Error Detect Circuit 67-68
Troubleshooting 7 Blinks Failure 69
8 Blinks Error Code 70
8 Blinks Error Code Circuit 71
Troubleshooting 8 Blinks Failure (Flowchart) 72
9 Blinks Error Code 73
10 Blinks Error Code 74
10 Blinks Error Detect Circuit 75
Troubleshooting 10 Blinks Failure (Flowchart) 76
Service Notes 77
Service Mode 78
Self Check/Reset 79
Mirror Function 80-81
Vsus Adjustment with Remote Control 82-83
Troubleshooting 84
1st Step Resistance Test – VFG and VFO 85
1st Step Resistance Test – 5V_F and VFG 86
2nd Step – SC Resistance Test 87
2nd Step – SC Resistance Test VFG and TPSC1 88
2nd Step – SC Resistance Test VFG and TPSC1 89
3rd Step SM Resistance 90
3rd Step SM Resistance Test VFG and VFO 91
3rd Step SM Resistance Test VFG and 5V_F 92
SM Board Isolation Procedure 93-95
TV’s Behavior After Connectors Removal 96
Glossary 97-99

Subject Slide

Troubleshooting 2 Blinks Failure 50
Troubleshooting 2 Blinks Failure (Flowchart) 51
3 Blinks Error Code 52
Troubleshooting 3 Blinks Failure 53-54
Troubleshooting 3 Blinks Failure (Flowchart) 55

Slide 3

Content

1 - Features

Series Lineup
New Features
Specifications

2 - Models Comparison

Boards Layout
Boards Part Number
Connectors Location
Technical Changes

3 - Start-up Operation

STB Operation

Power On Operation

4 - SOS Detect Circuit with Troubleshooting Flowcharts
5 - Video Signal Process Circuit/Panel Drive Operation
6 - Service Notes

Service Mode

Self-check

Reset

Aging Mode

7 - Troubleshooting

Boards Isolation Procedure

TV’s Behavior After Connectors Removal

Slide 4

Features

Slide 5

Series Line up

SERIES MODELS

42” 46” 50” 54” 58” 65”

VT SERIES

(FHD Premium 3D)

G SERIES

(FHD Core)

S SERIES

(FHD Leader)

PS,U SERIES

(FHD Entry)

X SERIES

(HD Leader)

PX,C SERIES

(HD Entry)

TC-P50VT25
TC-P50VT20

TC-P50G25

TC-P42G25 TC-P46G25

TC-P42S2 TC-P46S2 TC-P50S2 TC-P54S2 TC-P58S2 TC-P65S2

TC-P42U2

TC-P42X2 TC-P50X2

TC-42PX24

TC-P42C2

TC-P46C2

TC-P50G20

TC-50PS24

TC-P50U2

TC-50PX24

TC-P50C2

TC-P54VT25 TC-P58VT25 TC-P65VT25

TC-P54G25
TC-P54G20

TC-58PS24 TC-65PS24

Slide 6

New Features

VT25 VT20 G25 G20 S2 PS24 U2 X2 PX24 C2

Clubs Clubs

High
Picture
Quality

Smart
Networking

FHD 3D

NEW

Dual Scan

Short Stroke
Phosphor

NEW

THX Certified

Moving Picture 1080 Lines

1080p 720p

600Hz Sub-field Drive

NEW

Infinite Black Plus (Native CR > 2 Mil:1)

Viera Cast IPTV
Wi-Fi Ready (USB)x2
VIERA Image Viewer

Image Viewer (Photo only)

(Movie & Photo)

VIERA Link

4 HDMI 3 HDMI 2 HDMI

Stylish
Design

Environmen
tally

Friendly

Metallic

NEW

NEW

Buck Cut

Energy Saving

(Louver Filter)

Mercury & Lead Free + 100,000 hrs + Eco Mode

Slide 7

NEW

Glossy

NEW

& Pattern Texture

Glossy

Slide 7

Specifications (1 of 3)

VT SERIES G SERIES S SERIES PS SERIES U SERIES X S E RIES PX SERIES C SERIES

Main
Specification

Picture Deep Color

Resolution
Contrast

(Native)
Gradation
Filter

Remote
THX

X.V. Color
Game

Mode
Motion

Reality

1920X1080 1920X1080 1920X1080 1920X1080 1920X1080 1024X768 1024X768 1024X768

Infinite:1 Infinite:1 Infinite:1 Infinite:1 Infinite:1 Infinite:1 Infinite:1 Infinite:1

6144 6144 6144 6144 6144 6144 6144 6144
Louver

(Direct filter)
w/ Viera Cast w/ Viera Cast - - - - - ­Y Y N N N N N N
Y Y Y Y Y Y Y Y
Y Y Y Y Y Y Y Y
Y Y Y N Y Y N N

1080 lines 1080 lines 1080 lines 900 lines 720 lines 720 lines 720 lines 720 lines

Louver
(Direct filter)

AR AR - AR AR -

Slide 8

Specifications (2 of 3)

VT SERIES G SERIES S SERIES PS SERIES U SERIES X SERIES PX SERIES C SERIES

Sound Surround

Sound Control
BBE
Balance Control
Lip Sync

Improvement

Terminal
Input

AV1 Type
(Position)

AV2 Type
(Position)

Component1
Type (Position)

Component2
Type (Position)

HDMI1 Position
HDMI2 Position
HDMI3 Position

Y Y Y Y Y Y Y Y
Y Y Y Y Y Y Y Y
Y N N N N N N N
Y Y Y Y Y Y Y Y
Y Y Y Y Y Y Y Y

RCA/S
(Rear)

RCA
(Side)

RCA
(Rear)

RCA
(Rear)

Rear Rear Rear Rear Rear Rear Rear Rear
Rear Rear Rear Rear Rear Rear Rear Rear
Rear Side Side Side Side - - -

RCA/S
(Rear)

RCA
(Side)

RCA
(Rear)

RCA
(Rear)

RCA/S
(Rear)

RCA
(Side)

RCA
(Rear)

RCA
(Rear)

RCA/S
(Rear)

RCA
(Side)

RCA
(Rear)

RCA
(Rear)

RCA/S
(Rear)

RCA
(Side)

RCA
(Rear)

RCA
(Rear)

RCA/S
(Rear)

RCA
(Side)

RCA
(Rear)

RCA
(Rear)

RCA/S
(Rear)

RCA
(Side)

RCA
(Rear)

RCA
(Rear)

RCA/S
(Rear)

RCA
(Side)

RCA
(Rear)

RCA
(Rear)

HDMI4 Position
PC Input

Terminal
Output

Network Ethernet

Digital Audio
Out

Side - - - - - - ­1 1 - 1 - 1 ­Y Y Y Y Y Y Y Y

1 1 - - - - - -

Slide 9

Specifications (3 of 3)

VT SERIES G SERIES S SERIES PS SERIES U SERIES X SERIES PX SERIES C SERIES

Card I/F SD Card Slot

SD Card LED Color
SD Function

Other I/F USB

(Wi-Fi Ready)
RS-232C

Function DLNA

IPTV

Y Y Y Y Y Y Y Y
Blue - - - - - - ­Movie &

Photo
2 2 - - - - - -

1 - - - - - - -

- - - - - - - ­Viera Cast Viera Cast - - - - - -

Movie &
Photo

Photo Photo Photo Photo Photo Photo

Slide 10

Models Comparison

Slide 11

2009/2010 Models Comparison (1 of 2)

2009 model 2010model New features Remarks

3D Added(120kHz frame sequential)
Panel NeoPDPeco Panel
Native contrast Infinite:1

TC-P**V10 TC-P**VT25/20

TC-P**G10/15 TC-P**G25/20

TC-P**S1 TC-P**S2

Screen coating Louver (Direct filter, No front glass)
USB Added (Wi-Fi Ready)
Power Consumption -40%

Panel NeoPDPeco Panel
Native contrast Infinite:1
Screen coating Louver (Direct filter, No front glass)
Power Consumption -40%

Panel NeoPDPeco Panel
Native contrast Infinite:1
X.V. Color Added
Power Consumption -40%

TC-**PS14 TC-**PS24

Panel NeoPDPeco Panel
Native contrast Infinite:1
Gradation 6,144
X.V. Color Added
Power Consumption -40%

Slide 12

2009/2010 Models Comparison (2 of 2)

2009 model 2010model New features Remarks

Panel NeoPDPeco Panel
Native contrast Infinite:1
Gradation 6,144

TC-P**U1 TC-P**U2

X.V. Color Added
Game mode Added
Power Consumption -40%

TC-P**X1 TC-P**X2

TC-P**X14 TC-P**PX24

TC-P**C1 TC-P**C2

Panel NeoPDPeco Panel
Resolution 1024X768 (*1)
Native contrast Infinite:1
Gradation 6,144
X.V. Color Added
HDMI input 2 (*2)
Power Consumption -40%

Panel NeoPDPeco Panel
Resolution 1024X768 (*1)
Native contrast Infinite:1
Gradation 6,144
X.V. Color Added
Power Consumption -40%

Panel NeoPDPeco Panel
Resolution 1024X768 (*1)
Native contrast Infinite:1
Gradation 6,144
Power Consumption -40%

(*1)2009
model is
1,366 x 768.

(*2)2009
model is 3.

(*1)2009
model is
1,366 x 768.

(*1)2009
model is
1,366 x 768.

Slide 13

Connectors Location (TC-P42S2)

Slide 14

Boards Description

Board Description Board Description

A Speaker out, Sound Processor, AV Terminal, AV

Switch, DC-DC Converter, Digital Signal

Processor, Microcomputer, HDMI Interface, SD

card slot, Format-Converter, Plasma AI, Sub-

Field Processor, ( Newly Added Key Switch )

C1 Data Drive ( Right ) SC Scan Drive
C2 Data Drive ( Left ) SU Scan Out ( Upper )

K Remote Receiver, Power LED SD Scan Out ( Lower )

P Power Supply

42” SM

Boards comparison between 2009 S1 series and 2010 S2 series

2009

⇒

S1 series

SU + SD SM ( only 42inch )

⇒

2010

S2 series

Board

GK + S Delete ( on A board )

⇒

Slide 15

New

TC-P42S2 (FHD Model)

( 42inch only )

SU and SD board are

integrated to SM board

No fans

New

New

Power SW and

Key Input are

now on the A

board

Slide 16

Technical Changes

The resolution of the 50” HD models has been reduced from 1,366x768 to 1024x768 (Same as the 42”
HD models).

TC-P42S2

The Power Switch is located on the A board (G20 and S2 models). The U2, X2, and C2 models still
have the power switch on the S board.

The SU and SD boards are now just one board (SM). The TC-P42X2 model combines the SU, SD, and
SC boards into just on board (SN).
Instead of 30V, SUB5V is used as the Tuner +B. The tuner has a built-in DC-DC Converter.
P5V is produced in the A board. (Not in the P board.)
The Main CPU and the Front end processor circuit are built into one IC. (Nile-TCON IC8001).
IC8001 uses STB3.3V and STB1.2V as VCC.
Vset is no longer used on the SC board.
P25/A25 connector is deleted

G20/25, VT20 Series

No front glass is used on these models.

Slide 17

Start-up Operation

Standby/Power On

Slide 18

Standby Operation

P9

P

P

Circuit

STB

STB5V

P7

1 1

5V

A7

3.3V
REG

STB5V

3.3V
REG

3.3V

3.3V

POWER SWITCH

IC9003

PANEL

Vcc

Vcc

Processing

CPU

STB3.3V

MAIN

CPU

Signal

IC8001

A

A

A1 K1

3 3

K

K

REMOTE

REC.

LED

Slide 19

Standby Circuit Explanation

When the TV is plugged in:
AC is applied to the standby circuit in the power supply to produce STB5V.
The STB5V is provided to the A board via connectors P7 (Pin 1).
The STB5V from pin1 of connector P7 is applied to a 3.3V regulator to power the Main CPU

(IC8001) on the A board. This energizes and prepare the microprocessor (CPU) for program
execution.

The 3.3V from the voltage regulator besides being applied to the CPU, is also applied to the
remote control receiver and the power LED on the K board through connector A1/K1 (pin 3).

If the STB5V is missing, the TV is dead (No power)

Slide 20

Power On Operation

P9

P

P

RELAY

STB

Circuit

Vsus, Vda

STB5V

Power

CPU

F15V

P15V

P7 A7

7 7

55

3.2V

3.2V

TV_SUB_ON

SUB3.3V,

1.8V,1.2V

3.2V

5V

1 1

P6 A6

77
88

PA4701

99

14.6V
F15V

PANEL_MAIN_ON

IC9004

3.3V
REG

PANEL_STB_ON

STB5V

IC4700(A)

3.3V
REG

IC5606

IC5610

3.3V

STB3.3V

3.3V

10 blinks

SOS Detect

SUB1.8V

SUB1.2V

SUB5V

IC9003

PANEL

Vcc

Vcc

KEY_INPUT

Processing

CPU

IC8001

MAIN

Signal

IC4700(B)

IC4700(B)

Detect

A

CPU

TUNER

A

A1 K1

3 3

6

5 5

Voltage Drop

Error Detect

K

K

6

POWER
SWITCH

REMOTE

REC.

LED

IC5608

SUB3.3V

SUB3.3V

Slide 21

Power On Circuit Explanation

The power command from the power switch on the A board or the remote control
receiver on the K board is provided to the Main CPU on the A board (IC8001).
The CPU on the A board outputs the “TV_SUB_ON” Command (3.2V) and the
PANEL_STB_ON” command (3.2V).

The “TV_SUB_ON” command is provided to pin 5 of connector P7 of the power supply

to develop the F+15V. At this time, the relays on the power supply are triggered and a
“click” sound can be heard.

The F+15V from the P board is applied to several voltage regulator (IC5608- IC5610, and

IC5606) on the A board. The voltage output from these ICs are SUB5V, SUB1.8V,
and SUB1.2V respectively. They are used by various circuits on the A board.
To avoid catastrophic failures, they are monitored by an SOS Detect circuit (IC4700) for
over-voltage and over-current conditions. Any abnormalities of the SUB5V,
SUB1.8V, or SUB1.2V triggers the SOS circuit. The TV shuts down and the power LED
blinks 10 times.

The “PANEL_STB_ON” is used to turn on the 3.3V regulator (IC9004) on the A board.

The output voltage is applied to the “Panel CPU” on the A board. The Panel CPU on the
A board outputs the “PANEL_MAIN_ON” Command (3.2V) to pin 7 of connector P7 on
the P board. The “PANEL MAIN ON” command turns on the power supply circuit that
outputs the Vsus, Vda, and 15V.

Slide 22

CPU Commands Explanation

TV SUB ON (F-STBY-ON), PANEL-STB-ON, PANEL MAIN ON, and DISPEN.

The “TV Sub On”
The CPU on the A board outputs the

“TV_SUB_ON” Command (3.2V) when the
power is turned on. This command is used to
turn on the circuit in the power supply that
generates the F+15V.

The F+15V is provided to the A to generate the
Sub-voltages used by the signal process
circuit.
When the output of the Sub-voltages is
confirmed by the system MPU, it outputs the
“Panel STB On” command.
The “Panel STB On” (3.2V) command is used
to energize the panel MPU IC. When the panel
MPU is energized, it outputs the “Panel Main
On” command.

A7

A

5

7

PANEL_MAIN_ON

TV_SUB_ON

IC9004

RESET

RESET

3.3V

3.3V

IIC-SW

IIC-SW

P_ON/OFF

IC9003

panel

pane

uCOM

uCOM

l

IC8001-2

Nile-

Nile-

TCON

TCON

(SYSTE

(SYSTE

M CPU)

M CPU)

DISPEN

The “Panel Main On” (3.2V) command is
applied to the power supply to turn on the
circuits that generate the Vsus, Vda, P15V.

The “Dispen” (Display Enable) command is
applied to the Discharge Control/Sub-field
Conversion IC (IC9300) to begin panel drive
operation and video display.

PANEL_STBY_ON

PANEL_VCC_ON

Slide 23

P

STB5V

P7

Supply Voltages (Sub Voltages) For Video Processing Circuit

A7

5

5

IC4700

1

1

STB5V

1

RESET

RESET

3.3V

3.3V

TV_SUB_ON

MCU_XRST (STB_RST )

3

2

STB3.3V

IC5601

STB reset

STB reset

5

4

IC8001-1

Nile-TCON

Nile-TCON

(SYSTEM

(SYSTEM

CPU)

CPU)

A

F+15V

P6

5V

IC8004

EEPROM

EEPROM

IC8502
Flash ROM

Flash ROM

IC8002

DDR2

DDR2

SUB5V

IC5609

3.3V

IC5607

3.3V

IC5605

3.3V

IC5613

3.3V

Power
Switch

DDR_VCC_POST
=SUB1.8V

SUB1.2V

SUB3.3V_A

3.3V

SUB3.3V_HDMI

3.3V

SUB3.3V

3.3V

SUB3.3V_SD

3.3V

SUB5V

STB3.3V

SUB3.3V

IC2106-1

AMP

AMP

IC8503
EEPROM

EEPROM

IC4701
TEMP sense

TEMP se

JK8502

4

TU8302

TUNER

TUNER

LED/

Remote

A1

3
1

nse

SD card
SLOT

IC9004

RESET

A6

A6

7

7

8

8

9

9

#

= Steps

F+15V

6

RESET

3.3V

3.3V

IIC-SW

IIC-SW

PA4701
(Fuse)

F15V

IC5610

1.8V

1.8V

IC5606

1.2V

1.2V

IC5608

5V

SUB5V /
SUB5V_TUNER

Sub-Voltages Distribution Explanation

AC is applied to the standby circuit in the power supply to produce STB5V when the TV is plugged in.

The STB5V is provided to the A board via connectors P7 (Pin 1).

1

2

3

 The power command from the power switch on the A board or the remote control receiver

4



 The CPU on the A board outputs the “TV_SUB_ON” Command (3.2V)

5

 The F+15V from the P board is applied to several voltage regulator (IC5608- IC5610, and

6

The STB5V from pin1 of connector P7 is applied to a 3.3V regulator to power the Main
CPU (IC8001) on the A board. This energizes and prepare the microprocessor (CPU)
for program execution.

The 3.3V from the voltage regulator besides being applied to the CPU, is also applied to the
remote control receiver and the power LED on the K board through connector A1/K1 (pin 3).

The reset pulse from IC4700 is applied to the Main CPU (IC8001) for program execution.

on the K board (Not shown on the schematic) is provided to the Main CPU on the A board
(IC8001).

The “TV_SUB_ON” command is provided to pin 5 of connector P7 of the power supply
to develop the F+15V. At this time, the relays on the power supply are triggered and a
“click” sound can be heard.

IC5606) on the A board. The voltage output from these ICs are SUB5V, SUB1.8V,
and SUB1.2V respectively. These voltages are used by the signal processing circuit in the

A board.

The circuit responsible for processing the signal is now ready. All the necessary voltages are present.

Slide 25

P

STB5V

SND15V

P15V

11a

11b

VSUS

Vda

Supply Voltage (P15V) For 1

A7

P7

5

5

IC4700

RESET

RESET

3.3V

IC9004

RESET

RESET

3.3V

3.3V

IIC-SW

IIC-SW

3.3V

3.3V

CE(STB_D3.3V output)

DCDC_OE

13

P6

1

1

7

7

A6

1

1

2

2

3

3

A20

29

30

1

STB5V

IC2106-2

AMP

AMP

P15V

P15V

P15V
P5V

10

PANEL_MAIN_ON

SND15V

11

st

Stage of Panel Drive Circuit

TV_SUB_ON

MCU_XRST (STB_RST )

STB3.3V

IC9003

9

12

NRST

P_ON/OFF

STB_D3.3V

uCOM

8

IC9001

EEPROM

EEPROM

IC9803

3.3V

3.3V

IC9800

1.2V

1.2V

IC9801

5V

5V

P5V /
P5V_DCDC

panel

panel

uCOM

P3.3V

P3.3V

P1.2V

PANEL_READY

XRST

DRVRST

PANEL_STBY_ON

P3.3V

IC9400

Buffer

Buffer

IC9401

Buffer

IC8001-2

16

14

15

/PANEL_VCC_ON

IC9304

EEPROM

EEPROM

IC9300
Discharge control

Discharge control

Sub-field Conv.

Sub-field Conv.

IC9402

Buffer

Buffer

Buffer

Nile-

Nile-

TCON

TCON

(SYSTEM

(SYSTEM

CPU)

CPU)

7

DISPEN

17

Panel drive /

Picture signal

18

A

A31

66

67
68

66
68

A32

Panel Drive Circuit Supply Voltages

When the output of the Sub-voltages is confirmed by the system MPU,

7

The System CPU outputs the “Panel STB On/Panel VCC On” command to IC9004.

8
9

10

11

12

13

14

15

When Panel STB On command is applied to IC9004, STB3.3V is developed.
Reset (NRST) is also generated by IC9004

When STB3.3V and Reset are applied to the Panel CPU (IC9003), the PANEL MAIN
ON command is output to the power supply.

P15V is output from the power supply when it receives the PANEL MAIN ON command.

Vsus and Vda are also output at this point.

11b11a

Right after the PANEL MAIN ON command is output from IC9003, the P_ON/OFF
command is also output to IC9004.

IC9004 outputs the ENABLE command to the voltage regulators IC9800, 9801, 9803 to
output 3.3V, 1.2V, and 5V respectively.

IC9003 also outputs XRST
IC9003 outputs DRVRST (Drive Reset) to reset the drive section of IC9300 and begin

panel drive operation.

16

17

18

PANEL READY from the Panel CPU is output to the System CPU to signal the

beginning of panel drive operation.
IC8001 outputs the DISPEN (Display Enable) command to IC9300 to begin panel drive

and picture drive operation.
IC9300 outputs the pulses and data necessary to drive the panel and generate video.

Slide 27

Supply voltages (Vsus and Vda) for 2

When the Vsus, Vda, and P15V and all its derivates voltages are present, the panel drive circuit starts to
operate.

AC in

nd

Stage of Panel Drive Circuit

TC-P42S2

Relay

Power factor

control

SC SS

Vsus

P35

Vda

Vda

1
2

P11

1

SS11

1

SC2

Vsus

P2

11

VSUS

11a

Vda

11b

C1

Vda

C10 C20

1-5

16-20

Vsus

Vda

C25

Vda

1-2

C2

Slide 28

Overview of Voltage Distribution

The voltage distribution to all the boards is illustrated in this block diagram

P3.3V

Drawing is
46inch

50inch: C1-C2 → C1-C3

42inch: SU+SD → SM )

Slide 29

AC input

SU

TC-P42S2

The voltage distribution
to all the boards is
illustrated in this block
diagram

SC

DCDC
DCDC

DCDC

5V

SC2

Vsus

(P34)

P6
A6

Power

uCOM

F_STBY

F15V

Stand-by

power

REG

15V

P7

A7

STB5V

STB 5V

Relay

Power factor

control

15V

DC/DC

15V

Vsus

Vsus

Vda

P35

Vda

P11P2

15V

SC11

SS

DCDC

5V

SD

C1

SC20

15V

5V

A20

F15V

A31

C11

5V

3.3V

3.3V

3.3V

STB３．３V

A32

5V

C21

A

Vda

C25

SS33

5V

C23

C2

Slide 30

AC input

SU

SD

TC-P50/46S2

The voltage distribution
to all the boards is
illustrated in this block
diagram

SC

DCDC
DCDC

DCDC

SC20

15V

SC2

A20

5V

Vsus

(P34)

P2

P6
A6

F15V

A31

Power

uCOM

F_STBY

F15V

5V

Stand-by

power

REG

15V

P7

A7

3.3V

REG

STB5V

STB 5V

3.3V

STB３．３V

A32

5V

Relay

Power factor

control

15V Vda

DC/DC

Vsus

15V

A

C2

Vsus

Vda

P11

Vda

P35

SC11

SS

DCDC

SS33

5V

C23C25

C1

3.3V

C3

Slide 31

Troubleshooting “No Power” Symptom

Cautions: Disconnect the AC Power prior to making any disconnection or connection.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin
indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the
TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

Start Here

Check the SD card slot for metal objects. Check also for bended pins. Make sure that connector P6 on the P board is properly connected.

Check all the connections between the P board and the A board. Make sure P7/A7 is properly seated. Plug in the TV and turn it on

No

Replace the P

board

No

Is there 5V

at pin 1 of

connector A7

at plug in?

Replace the A

Yes

board

No

Is there

approx. 3.2V at pin 5

of connector P7 on

the P board when the

power button is

pressed?

Do the

AC relays click

after pressing the

power switch?

Yes

Replace the P

board

Yes

Place your voltmeter on 7 of connector P7

and press the power switch.

No

Replace the A

board

Is there

approx. 3.2V

present?

Yes

Replace the P

board

Slide 32

Signal Processing

Slide 33

Comparison Between the Signal Process Circuit used in the 2009

Models and the Signal Process Circuit used in the 2010 models

Nile-TCON

2009

CPU And Front

End Processor IC

New

2010

Slide 34

Signal Process Circuit

TUNER

TUNER

Digital

Digital

Analogue

Analogue

Analog

Digital (Serial data)

IC8001

IC8001

(Nile-TCON)

(Nile-TCON)

Resize

Resize

IP conv.

IP conv.

Signal

Signal

Processor

Processor

LVDS

IC9300

IC9300

Sub-field

Sub-field

Conv.

Conv.

Discharge

Discharge

control

control

Test-pattern

Test-pattern

OSD

VIDEO

DATA

Sustain

control

Scan control

A

A

A31

A32

A20

IC9003

IC9003

PDP-drive uCOM

PDP-drive uCOM

Slide 35

Signal Process Circuit Explanation

The main function of the A board is to select and process one of the incoming video signals. Video inputs 1 and 2, Component
Video Inputs 1 and 2, HDMI inputs 1,2 and 3, and the composite video output of the tuner are all connected to IC8001 for
selection. The video input signal can be in any of the three formats: Video, Y/C, or Y, Pb, Pr.
A comb filter inside IC8001 converts the composite video signal of the main picture to Y and C (lumin ance and chrominance)
signals. S-Video, which is already Y/C separated, simply passes through the comb filter. The signal is then converted to RGB.

At the completion of this process, the format of the composite or S-Video signal is now the same as a digital 1080i component
signal. If the incoming video is in the 480p, 720P, 1080i, and 1080p format, the Y, Pb, and Pr signals undergo A/D (analog to
digital) conversion only.

Digital television reception of the tuner is output in the form of an IF (Intermediate Frequency) signal .
The transport stream from the tuner enters the VSB I/F (Interface) section of IC8001 where the video signal is extracted and
converted to YUV data. The output is provided to the Video Input I/F for selection. The JPEG data of the SD card enters the
JPEG I/F section of IC8001 for conversion into YUV data and output to the Video Input I/F circuit. The video input interface
outputs the selected picture data to the video process circuit.

This Video Process section of the IC performs all picture control operations such as brightness, contrast, color, tint, etc. On
Screen Display data such as channel numbers, Digital TV closed caption, and picture adjustments are mixed with the video
data. LVDS (Low Voltage Differential Signaling) is output to IC9300 (Plasma AI, H/V Sync Control, and Sub-field Processor).
The Plasma AI (Adaptive brightness Intensifier) circuit analyzes the video program level for the distribution of dark and bright
components. This circuit is also used to speed up the scanning process and control the number of sustain periods. This
increases the brightness and improves the contrast ratio.
The data drive signals are output to the C1 and C2 boards. The C1 board drives the right portion of the panel and the C2 board
drives the left portion

IC9300 also provides the scan, sustain and data drive signals.
The scan pulses are output to the SC board. The sustain pulses are output to the SS board.

The main MCU handles all video applications. It serves as the controller that monitors all operations of the TV section of the
unit.

Slide 36

Audio Signal Processing Circuit ( TC-P42S2/U2/X2/C2)

All the audio signal processing is done by the Main CPU/Signal Processor IC (IC8001). The digital
audio signal from IC8001 is output to the optical audio output jack as PCM/Dolby Digital.

Serial data is output to the audio amplifier IC (IC2106). The output of IC2106 is connected to the
speakers.

Opt

Audio out

(Digital audio)

(Serial data)

IC2106

AMP

AMP

A11

TU8302

TUNER

TUNER

COMP1/2

Video1/2

HDMI1/2/3

RF(A)

IC8001

Nile-TCOM

Audio

Audio

Audio

Processor

Processor

X8000

Slide 37

SOS Detect

(Shutdown)

When an abnormality occurs in the unit, the “SOS Detect” circuit is triggered and the TV shuts down.
The power LED on the front panel will flash a pattern indicating the circuit that has failed.

Cautions:

If the power LED continues to blink even after the TV is unplugged, press and hold the power switch
on the TV for a few seconds until the LED turns off.

Some steps require removal of connectors and sometimes PC boards removal. Do not allow the TV to
run for more than 30 seconds while connectors or boards are disconnected.

Warning: The Vsus line has large capacitors that hold the charge for some time even after the TV has been turned off and

unplugged. When disconnecting P2/SC2 or P11/SS1, bleed the remaining charge of the Vsus before reconnecting the cable.
Use a 500 ohms/ 5W (At least) resistor to discharge the Vsus line before reconnecting P2/SC2 or P11/SS11.

Slide 38

Protection circuit block diagram (TC-P42S2)

Voltage detect

Energy recover

SOS8

IC9004

(8 Blinks)

SM

Voltage detect

Vscn over-voltage

Voltage detect

Vscn voltage-drop

Voltage detect

15V_F / 5V_F

SU/SD board

connection

Connection check

Voltage detect

Energy recover

FPC connection

Connection check

15V

SC

SC

SS

SS

Vsus

Vsus

15V

SOS6 (6 Blinks)

SOS7 (7 Blinks)

P

P

Power

CPU

Vsus

Vda

C2C1

Detect abnormal

15V

15V

F15V

STB5V

Red LED

SOS8 (8 Blinks)

A

A

F15V

Buffer

( Level

shift )

Power off

(4 Blinks)

5V

3.3V

Sub-Field

convert

IC4700

Detect SUB

9V/5V/3.3V

LED pulse

(6 Blinks)
(7 Blinks)

IC9003

Panel

CPU

(5 Blinks)

(2 Blinks)

(3 Blinks)

(9 Blinks)

Reset

IC8001

Nile-TCON

SYSTEM

(10 Blinks)

CPU

Alarm

PANEL

Slide 39

Power LED Error Code Definition (1 of 2)

POWER LED

ERROR

CODE

1 BLINLK

2 BLINKS P15V form the P board

3 BLINKS P3.3V from the A board

4 BLINKS

5 BLINKS P5V from the A board

6 BLINKS SC Energy Recovery Circuit

CIRCUIT MONITORED

Panel Information SOS

Panel Alarm SOS

Power Supply output

voltages

CONDITIONS TRIGGERING

THE SHUTDOWN

Communication problem between the System CPU
(IC8001) and the Panel CPU (IC9003)

Missing P15V

• P15V is not been generated by the P board.

• P15V is been affected by one of the boards it is

connected to (A short circuit of the P15V).
Wrong diagnostic by the A board
Missing P3.3V
Reasons:

• The A board is not generating the 3.3V

• The 3.3V is been affected by one of the C boards

or the Panel (A short circuit of the P3.3V).
Wrong diagnostic by the A board
Regulation issues with any of the voltages output from the
power supply.
Wrong diagnostic by the A board
Missing P5V
Reasons:

• The A board is not generating the 5V

• The 5V is been affected by the SC, SS, A, or C2

board (A short circuit of the P5V).
Wrong diagnostic by the A board
An increase or reduction of the Energy Recovery Circuit
output (MID).
Open connection between connector A20 on the A board
and SC20 on the SC board.
Open connection between any of the ribbon cables on the
C boards and the A board.
Open connection between the ribbon cable/cables
interconnecting the C boards.
Wrong diagnostic by the A board.

LIST OF BOARDS POSSIBLY CASUSING THE FAILURE

MOST

COMMON

A

SC P SS A

C1 or C2 A Panel

P A

SC,SS C2 A

SC A

2ND OCCASIONALLY RARELY

¤

¤

¤

¤

¤

¤

¤

¤

C

Slide 40

Power LED Error Code Definition (2 of 2)

POWER LED

ERROR

CODE

7 BLINKS

8 BLINKS

9 BLINKS

10 BLINKS

CIRCUIT MONITORED

Scan Drive Circuit and

Connection between the SC

board and the SM board.

Sustain Drive Circuit and

Connection between the SS

board and the Panel.

Discharge Control Circuit

(IC9300)

CONDITIONS TRIGGERING

THE SHUTDOWN

Missing Vsus.
Abnormality of the scan circuit output, the 15V_F, the
scn_pro, and Vscn circuit.
Loose or open Connection between the SC board and the
SM board (SC41, SC42, SC46).
Open or loose connection between connectors SC2/P2
Wrong diagnostic by the A board
Defective panel
Abnormality of the sustain drive circuit.
Open or loose connection between the SS bd and FPCs
from the panel (SS61, SS64, SS21,SS24, and SS58).
Open or loose connection between connectors C10/C20
Wrong diagnostic by the A board
Defective panel

Failure of IC9300 A

Abnormalities of the F+15V.

• Reasons:

• The P board is not generating the F+15V

• SUB Voltages are affected by the K board or by

metal object present in the SD card slot..
Shorted Vsus (By the SS board or SC board).
Shorted Vda (By the panel, C1, or C2 board)
Wrong diagnostic by the A board.

LIST OF BOARDS POSSIBLY CASUSING THE FAILURE

MOST

COMMON

SC SM Panel A

SS Panel A C2

SS SC A - P K

2ND OCASSIONALLY RAREALLY

¤

¤

¤

Slide 41

SOS Detect Circuit (TC-P42S2)

A7

9

SUB5V

SUB1.8V

SOS4_PS

FAN_SOS

STB3.3V

STB3.3V

If all inputs = L,

output = L

IC4700

REG

(STB3.3V)

RESET

29

27

28

30

4

SOS

SOS4_PS

PANEL READY (STATUS)

PANEL ALARM (SOS)

SOS4_PS

67

IC9004

REG

(STB3.3V)

RESET

5 blinks

5

4

3

SOS6
SOS7
SOS8

65

68

66

3 blinks

SOS6
SOS7
SOS8

28
29

30

5V to 3.3V

IC8001

10 blinks 9 blinks

AC7

SOS_DCC

B27

IC9300

Nile-TCON

SOS8

DRV_RST

85

2 blinks

78

4 blinks

IC9003

GenX7

PDP

panel

uCOM

6 blinks
7 blinks
8 blinks

6 blinks

P5V

60

P3.3V

61

P15V

62

SUB1.2V

STB3.3V

31

(SYSTEM

uCOM)

A20

15 16

Q9900
Q9901

63

3.3V Detect

A32

1

P5V

P3.3V

SUB5V

SUB1.8V

SUB1.2V

IC9801
IC9803

IC5608
IC5610
IC5606

P15V

A6

1~3

F15V

7~9

PA4701

Slide 42

SOS Detect Circuit (1 of 3)

Protection circuits are incorporated in the unit to prevent the failure of a single circuit or component
from creating catastrophic damage.
A shutdown condition occurs when there is an over voltage, a short or a drop in any of the voltage
lines. If the TV has fans, the shutdown circuit is triggered when they draw more current than normal.
Note: The model TC-P42S2
The Nile-TCON CPU/Front End Processor (IC8001) and the GenX7 Panel CPU IC9003 of the A board
detect when a shutdown condition has been triggered.
When an abnormality has occurred, the unit’s protection circuit operates and the TV is reset to the
standby mode. At this time, the defective block can be identified by the number of blinks of the
POWER LED on the front of the unit.
The Panel MPU IC9003 of the A board (Located on the D board on previous generations) detects
conditions that make the power LED blinks1, 2, 3, 4, 5, 6, 7, 8, or 9 times.
The Main MPU IC8001 of the A board detects conditions that make the power LED blinks 10 times.
The number of times that the POWER LED blinks indicates the areas where a problem is suspected.

1 Blink SOS:

2 Blinks SOS:

kept high. If the 15V line is missing or shorted, a low is provided to pin 62. As a result, the unit
shuts down and the power LED blinks 2 times.

3 Blinks SOS:

present at pin 61, the CPU (IC9003) shuts down the unit. The power LED blinks 3 times.

Communication error between System CPU IC8001 and Panel CPU (IC9003).

Pin 62 of the CPU IC9003 monitors the 15V line. During normal operation pin 62 is

The 3.3V from IC9803 on the A board is monitored by IC9003. If the 3.3V is not

Slide 43

Panel Drive SOS Detect Block Diagram (TC-P42S2/U2)

SM

SM

SM41

SM42

SC

SC

SC41

VF_G

SC42

VF_G

Vsus pulse

RECOVERY

D16583

IC16581

(6X) SOS

DETECT

Vscan

DETECT

15V/5V_F

DETECT

SC50

ENERGY

UHZ

Vsus

SC20

15V

SOS6

SOS7

SC2

up

low

35

21
20

18

1

6
7

1

P2

A20

29
30

1

15
16

18

63
66

SOS6
SOS7

UHZ

SOS8

P3.3V

P

P

A

A

P15V

P5V

28
29

IC9004

STB_D3.3V

/ RESET

31

30

Vda Vsus

P6
A6

SOS6

5

SOS7

4

UHZ

2

3

Discharge

SOS8

P15V

66
68

IC9300

Control

3

3

3.3V

IC9003

PANEL CPU

66

5V

P11

1
4

PANEL MAIN ON

SS33

SS11

1
4

P5V

Vsus

IC16251

(8X) SOS

DETECT

1 7

Vsus pulse

ENERGY

RECOVERY

15V

SOS8

SS21

SS24

SS

SS

D16253

SS61

SS64

C1

C1

68

A32

P5V

P5V

SOS8

SS58

SS2

SS2

C21

6

117

C23

C2

C2

Slide 44

SOS Detect Circuit (2 of 3)

4 Blinks SOS: When a voltage regulation issue of any of the lines from the power supply occurs,

pin 9 of connector P7 goes high. This high is provided to pin 67 of IC9003 of the A board triggering
the “POWER SOS” circuit. When this happens, the TV shuts down and the power LED blinks 4
times. Primarily the P board causes 4 blinks, followed by the A board.

5 Blinks SOS:

kept high. If the 5V line is missing or shorted, a low is provided to pin 60. As a result, the unit shuts
down and the power LED blinks 5 times.

6 Blinks SOS:

operation, a low is applied to pin 65. If the SC board becomes defective, a high is provided to pin

65. As a result, the unit shuts down and the power LED blinks 6 times.
The TC-P42X2/C2 series have an energy recovery circuit in the SN boards. This circuit monitors the
scan board output and the sustain board output. Any abnormality on this circuit will trigger the 6
blinks code. If SC20 is disconnected or is not seated properly, the TV shuts down with 6 blinks.

7 Blinks SOS:

normal operation, a low is applied to pin 68. If the SC, SU, or SD board becomes defective, a high
is provided to pin 68. As a result, the unit shuts down and the power LED blinks 7 times.

8 Blinks SOS:

operation, a low from connector SS33 on the SS board is connected via the C2 board to pin 63 of
connector A32 on the A board. Pin 63 of A32 is connected to pin 66 of the panel CPU IC9003. If the
SS board becomes defective, a high is provided to pin 66. As a result, the unit shuts down and the
power LED blinks 8 times.
8 Blinks condition is also caused when the connections between the panel’s flex-cables and the
sustain board are broken or the connector are not properly seated.

Pin 60 of the CPU IC9003 monitors the 5V line. During normal operation, pin 60 is

Pin 65 of the CPU IC9003 monitors the status of the SC board. During normal

Pin 68 of the CPU IC9003 monitors the status of the SC, SU, SD board. During

Pin 66 of the MPU IC9003 monitors the status of the SS board. During normal

Slide 45

SOS Detect Circuit (3 of 3)

10 Blinks SOS: IC5606 generates the SUB1.2V, IC5610 generates the SUB1.8V, and IC5608

generates the SUB5V. The output from these ICs are monitored by the Analog-ASIC (An Application­Specific Integrated Circuit (ASIC) IC4700. Any abnormality on these voltages (Including the
F_STB15V), triggers the shutdown circuit. The MPU shuts down the unit. The power LED blinks 10
times.
A short circuit of the Vsus or the Vda can also cause a 10 blinks shutdown.

INPUT OUTPUT

SUB 1.2V FAN SOS SUB 5V SOS4 SUB 1.8V SOS

Pin 31 Pin27 Pin 28 Pin 29 Pin 30 Pin 4

L L L L L 0.3V
L H L L L 2.55V
L X H L L 1.95V
L X X H L 1.35V
L X X X H 0.75V

H X X X X 3.0V

Normal

SOS 10X

Slide 46

1 Blink Error Code (Communication Error Between IC8001 and IC9003)

This condition can cause the TV to shutdown and the power LED to blink 1 time

1. No communication between IC8001 and IC9003

Since both ICs are located on the A board, only the A board should be replaced

Note: In 2009 models, STB5V for IC8001 and IC9003 is provided by 2 different connectors. For this
reason if there were connection problems between the P board and the A board, the TV would’ve
went into shutdown with one blink. This is not the case with the 2010 models. Only the A board can
possibly cause 1 blink shutdown.

Slide 47

Troubleshooting 1 Blink Failure

If the TV shuts down and the power

LED blinks 1 time, replace the A

Slide 48

2 Blinks Error Code (P15V Abnormality)

These 2 conditions can cause the TV to shutdown and the power LED to blink 2 times

1. Missing P15V

Reasons:

 P15V is not been generated by the P board.
 P15V is been affected by one of the boards it is connected to (A short circuit of the P15V).

2. Wrong diagnostic by the A board

Slide 49

Troubleshooting 2 Blinks Failure

A 2 blinks condition is caused by the SC, SS, A, or P board. (SC>SS>A>P)

Troubleshooting

Unplug the TV and do a resistance test between the P15V and ground to determine if the P15V is
shorted or not.

15V not shorted

If the 15V is not shorted, the possibilities of the SC and SS boards being defective are eliminated.
To determine between the P board and the A board, connect the TV, turn the power on, and check to
see if the P15V is present.
If P15V is present, the A board is likely to be defective. If P15V is missing, the P board is defective.

Shorted 15V

If a short is found, with the TV disconnected, start removing the connectors providing P15V one at a time
until the source of the short is detected.

(Only the A and P board are suspected of causing the problem)

Warning: The Vsus line has large capacitors that hold the charge for some time even after the TV has been turned off and

unplugged. When disconnecting P2/SC2 or P11/SS1, bleed the remaining charge of the Vsus before reconnecting the cable.
Use a 500 ohms/ 5W (At least) resistor to discharge the Vsus line before reconnecting P2/SC2 or P11/SS11.

Slide 50

Troubleshooting 2 Blinks Failure (2)

Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on

the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin

indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the
TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

Start Here

Unplug the TV and check the resistance between pin 1 of connector P6 and ground (Chassis)

Plug in the TV and turn it on.

Measure the voltage at pin 1 of

connector P6

Is there

15V

present?

Replace the P

board

YesNo

Replace the A

board

No

Is there a

short

circuit ?

Reconnect P11 and measure the

resistance between pin 1 of

connector P6 and ground (Chassis)

Yes

Unplug connectors P6 and P11, on
the P board. Measure the
resistance between pin 1 of
connector P6 and ground (Chassis)

No

Is there a

short

circuit?

Yes

Replace the P

board

Disconnect SC20 on the SC board and reconnect P6. Measure the

resistance between pin 1 of connector P6 and ground (Chassis)

Replace the SC

board

No

Is there a

short

circuit?

Yes

Replace the A

board

No

Is there a

short

circuit?

Yes

Replace the SS

board

Slide 51

3 Blinks Error Code (P3.3V Abnormality)

These 2 conditions can cause the TV to shutdown and the power LED to blink 3 times

1. Missing P3.3V

Reasons:

 The A board is not generating the 3.3V
 The 3.3V is been affected by one of the C boards or the Panel (A short circuit of the P3.3V).

2. Wrong diagnostic by the A board

Slide 52

Troubleshooting 3 Blinks Failure

A 3 blinks condition is caused by the A, board, C board, or the panel (A>C>Panel)

Note: In previous generations of Panasonic Plasma TVs (With the exception of the 2009

model, TC-P54Z1), a 3 blinks error code was normally caused by the A or DG board.
In 2010 models, the P3.3V generated in the A board is used by the A board, the C boards,

and the panel drive ICs of the FPC from the panel into the C boards.

Troubleshooting

Unplug the TV and do a resistance test between the P3.3V and ground to determine if the
P3.3V is shorted or not.

3.3V not shorted

If the 3.3V is not shorted, the possibilities of the C boards or the panel being defective are
eliminated.
If P15V is present, the A board is likely to be defective.

Shorted 3.3V

If a short is found, with the TV disconnected, start removing the connectors providing P3.3V
one at a time until the source of the short is detected.

(Only the A is suspected of causing the problem)

Slide 53

Troubleshooting 3 Blinks Failure (P3.3V Location)

The connectors used for the
distribution of P3.3V in the A and C
boards use ribbon cables. Measuring
the voltage at these locations might
be a little challenging and difficult. To
easily measure the P3.3V, locate the
test point TP9800.

TP9800 is located just above the
factory connector A37 shown in the
image to the right..

TC-P42S2

P3.3V-TP9800 Location

A

Slide 54

Troubleshooting 3 Blinks Failure

Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on

the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin

indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the
TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

Start Here

Unplug the TV and check the resistance between TP9800 on the A board and ground (Chassis). (Go

to the previous page (Slide 54) to see a picture showing the location of TP9800.)

Plug in the TV and turn it on.

Measure the voltage at TP9800 on

the A board

Is there

3.3V

present?

Replace the P

board

The problem could be the C2

board or the panel. Proceed to

isolate the panel from the C2

board to determine which is bad.

Replace the A

YesNo

board

No

Disconnect the ribbon cable between

C1 and C2 and reconnect A31.

Measure the resistance between

TP9800 and ground (Chassis)

No

Is there a

short

circuit ?

Is there a

short

circuit?

Yes

Yes

Unplug connectors A31 and A32,
on the A board. Measure the
resistance between TP9800 and
ground (Chassis)

No

The problem could be the C1

board or the panel. Proceed to

isolate the panel from the C1

board to determine which is bad.

Is there a

short

circuit?

Yes

Replace the A

board

Slide 55

4 Blinks Error Code (Abnormality of Power Supply Output )

These conditions can cause the TV to shutdown and the power LED to blink 4 times

1. Regulation issues with any of the voltages from the power supply.

 If PFC goes over 470V (±50V) or below 165V (±20V)
 If Vsus goes over 240V (±10V)
 If Vda goes above 67V (±4V) or below 28V (±4V)
 If there’s an over current condition at the P15V line

2. Wrong diagnostic by the A board

The power supply outputs STB5V, F+15V, Vsus, Vda, and P15V. These voltages are
necessary to drive the different circuits in the TV.

In order to provide protection to the TV, these voltages are monitored. If any abnormality is
detected, the power supply outputs a shutdown voltage (SOS4_PS) to the System CPU to
disable the Unit.

A 4 blinks condition is normally caused by the P board or the A board.

Slide 56

4 Blinks Error Code (Abnormality of Power Supply Output )

TC-P**S2

A7

9

SUB5V

SUB1.8V

SOS4_PS

FAN_SOS

STB3.3V

STB3.3V

If all inputs = L,

output = L

IC4700

REG

(STB3.3V)

RESET

29

27

28

4

SOS

PANEL READY (STATUS)

PANEL ALARM (SOS)

IC8001

10 blinks

AC7

Nile-TCON

SOS4_PS

67

4 blinks

IC9003

GenX7

PDP

panel

uCOM

SUB1.2V

STB3.3V

30

31

(SYSTEM

uCOM)

SUB5V

SUB1.8V

SUB1.2V

IC5608
IC5610
IC5606

A6

F15V

7~9

PA4701

Slide 57

Troubleshooting 4 Blinks Failure

Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on

the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin

indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the
TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

Start Here

Place the positive lead of a voltmeter at pin 9 of connector P7 while the black lead is connected to

ground (Chassis ground). Plug in the TV and turn it on

Replace the A

board

No

Is pin

9 of CN P7 high

(Approx. 3V)

before the TV shuts

down?

Yes

Replace the P

board

Slide 58

5 Blinks Error Code (P5V Abnormality)

These 4 conditions can cause the TV to shut down and the power LED to blink 5 times

1. Missing P5V

Reasons:

 The A board is not generating the 5V
 The 5V is been affected by the SC, SS, A, or C2 board (A short circuit of the P5V).

2. Wrong diagnostic by the A board

Slide 59

Troubleshooting 5 Blinks Failure

A 5 blinks condition is caused by the A, C, SC, or SS board. (A>C>SC>SS)

Note: In previous generations of Panasonic plasma TVs, P5V is used by the panel. In the 2010 models

P5V is not used by the panel.

Troubleshooting

Unplug the TV and do a resistance test between the P5V and ground to determine if the P5V is
shorted or not.

P5V not shorted

If the P5V is not shorted, the possibilities of the SC, C2, and SS boards of being defective are
eliminated.
To determine between the P board and the A board, connect the TV, turn the power on, and check to
see if the P5V is present.
If P5V is present, the A board is likely to be defective. If P5V is missing, the P board is defective.

Shorted P5V

If a short is found, with the TV disconnected, start removing the connectors providing P5V one at a time
until the source of the short is detected.

(Only the A and P board are suspected of causing the problem)

Slide 60

Troubleshooting 5 Blinks Failure (TP-C42S2)

To easily measure the P5V, locate the
coil L9801.

L9801 is located just above the
connector A20 shown in the image to
the right..

P5V-L9801 Location

Slide 61

Troubleshooting 5 Blinks Failure

Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on

the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin

indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the
TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

Start Here

Unplug the TV and check the resistance between L9801 on the A board and ground (Chassis). (Go to

the previous page (Slide 61) to see a picture showing the location of L9801.)

Plug in the TV and turn it on.

Measure the voltage at L9801

Is there

5V

present?

Replace the P

board

Loosen the A board and disconnect SS33 on the SS board or C23
on the C2 board. Reconnect A32. Measure the resistance between

Replace the SS

board

YesNo

Replace the A

board

L9801 and ground (Chassis)

No

Is there a

short

circuit?

Yes

No

Is there a

short

circuit ?

Reconnect A20 and measure the

resistance between L9801 and

ground (Chassis)

Yes

No

Replace the C2

board

Unplug connectors A20 and A32,
on the A board. Measure the
resistance between L9801 of and
ground (Chassis)

No

Is there a

short

circuit?

Is there a

short

circuit?

Replace the A

Yes

Replace the SC

Slide 62

Yes

board

board

6 Blinks Error Code (SC Energy Recovery Circuit Abnormality)

These 5 conditions can cause the TV to shutdown and the power LED to blink 6 times

1. An increase or reduction of the Energy Recovery Circuit output (MID).

2. Open connection between connector A20 on the A board and SC20 on the SC board.

3. Open connection between any of the ribbon cables on the C boards and the A board.

4. Open connection between the ribbon cable/cables interconnecting the C boards.

5. Wrong diagnostic by the A board

TC-P42S2

Slide 63

6 Blinks Error Code Circuit Explanation

6 Blinks SOS

Energy Recovery/Vscan

The energy recovery circuit and Vscan are monitored in the SC board. Failure of any
these 2 circuits triggers the SOS6 line causing the unit to shut down and the power LED
to blink 6 times.
Under normal operation, the output voltage (MID) of the “Energy Recovery” circuit ranges
between 68V and 138V. If the voltage drops below 67V or increases above 139V, the
error detect circuit (IC16581) is triggered. This causes a high to be output to pin 21 of
connector SC20.
Pin 21of SC20 also goes high, if the Vscan generating circuit fails.

The voltage from SC20 is connected to pin 65 the Panel CPU (IC9003) in the A board via
the DC level shifter section of the multi-functions IC (IC9400).
When pin 65 of the panel CPU (IC9003) goes high, the TV shuts down and the power
LED blinks 6 times.

TC-P42S2

This condition is normally caused by the SC, A, or P board. (SC>A>P).
6 blinks can also be caused by open connection between the C boards and open
connection between any of the C board and the A board.
Note: This circuit is different than the circuit used in 2010 HD models (TC-P**X2/C2)

Slide 64

P15V and P5V Test Points (SC Board)

TC-P42S2

SC

Slide 65

Troubleshooting 6 Blinks Failure

Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on

the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin

indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the
TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

Start Here

Verify that all the cables on the SC board are properly seated. Also check the ribbon cables and connectors on the A and C boards. Unplug the TV
and disconnect connector SC20 on the SC board and connector C10 on the C1 board. Plug in the TV and turn it on

Check connections

between the P and SC

boards. If ok, replace

the P board

Are there 15V and 5V

at the SC board. (See

the previous page for

test points location)

6 Blinks

YesNo

No

Replace the A

board

Did the

number of

blinks change

to 8 blinks?

Yes

Replace the SC

board

Slide 66

7 Blinks Error Detect Circuit

These 4 conditions can cause the TV to shut down and the power LED to blink 7 times

1. Missing Vsus.

2. Abnormality of the scan circuit output, the 15V_F, the scn_pro, and Vscn circuit.

3. Defective Panel.

4. Loose or open Connection between the SC board and the SM board.

5. Wrong diagnostic by the A board

S

S

M

M

SM41

SM42

SC

SC

SC41

VF_G

SC42

CH
A

SC50

VF_G

Vscan

DETECT

15V/5V_F

DETECT

Vsus

15V

SOS7

SC2

SC20

35

20

low

1

6
7

1

P2

A20

29
30

1

P

P

A

A

P15V

P5V

IC9004

STB_D3.3V

/ RESET

Vda Vsus

P6
A6

SOS7

4 2916

P15V

3

3

3.3V

IC9003

PANEL CPU

68

5V

ON

PANEL MAIN

The SOS7 circuit monitors
the panel, the scan circuit
output, the 15V_F, the
scan_pro, Vscan, and the
physical connection
between the SC board and
the SM board (CHA).

If any abnormality occurs
on any of these lines or
Vsus is missing, the TV
shuts down and the power
LED blinks 7 times. If any
of the connectors between
the SC and the SM board is
open, the TV also shuts
down and the power LED
blinks 7 times.

Slide 67

Troubleshooting 7 Blinks Failure

Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on

the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin

indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the
TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

Preparation:

Disconnect AC Power prior to making any disconnection or connection.
Wait at least 2 minutes before the removal of any connector.
Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power
switch on the TV for a few seconds until the LED turns off.
Remove the front cabinet and expose the panel to a bright light for a thorough visual inspection.
Check for cracks and blown pixels or any other abnormalities.

Check for burnt spots on the SM board.

If the panel is defective, it is possible that the SM board and/or the SC board are also defective.
Replace the panel, the SM, and SC boards if the resistance test indicates they are defective.

Warning: The Vsus line has large capacitors that hold the charge for some time even after the TV has been turned off and

unplugged. When disconnecting P2/SC2 or P11/SS1, bleed the remaining charge of the Vsus before reconnecting the cable.
Use a 500 ohms/ 5W (At least) resistor to discharge the Vsus line before reconnecting P2/SC2 or P11/SS11.

Slide 68

Troubleshooting 7 Blinks Failure

Start Here

Check all the connectors on the SC and SM boards. Make sure they are properly seated. If the TV still shuts down with 7 blinks, unplug it and

perform the 1

Follow the SM isolation procedure explained on

slides 93~95. Then plug in the TV and turn it on.

Note: Do not allow the TV to stay on for more than

Replace the SM

board

Replace the A

board

st

step of the resistance test (See slides 85 and 86). “VFG and VFO (TPSC1) Resistance Test (TC-P42S2)”

30 seconds

Is the TV still

shutting down

with 7 blinks?

No

blinks changed

Did the

number of

to 6 blinks?

No

YesNo

Disconnect SC20. Plug in

the TV and turn it on

Yes

Replace the SC

board

Did the test

indicate a low

resistance?

Yes

No

Did the

test

indicate a

defective

SC?

Proceed with 2nd

step of the

resistance test

(See slides 87~89).

VFG and 5V-F

Resistance Test

and VFG and VFO

Resistance Test

(TC-P42S2)

Yes

Note-2: Check the panel for abnormalities
and burnt pixels. If defective, change the
panel, the SM board, and the SC board

6 Blinks

Replace the SM

board (See note-1)

No

Is the TV

shutting

down with

7 blinks?

Yes

Replace the SM

board and the SC

board. (See note 2)

Follow the SM
isolation procedure
explained on slides

93~95. Then plug in

the TV and turn it on.

Note: Do not allow

the TV to stay on for

more than 30 seconds

Note-1: Check the panel for abnormalities and burnt
pixels. If defective, change the panel and the SM board

Replace the SC

board. Perform

part 3 of the

resistance test

to see if the SM

is also bad.

(See note-1)

Slide 69

8 Blinks Error Code

These 4 conditions can cause the TV to shut down and the power LED to blink 8 times

1. Abnormality of the Sustain drive circuit.

2. Open or loose connection between the SS board and FPCs from the panel.

3. When SC20, SC2, and SC10 are all disconnected.

4. Wrong diagnostic by the A board

The SOS Detect circuit in the Sustain board monitors:

 Physical connection between the panel and the SS board.
 The output of the sustain drive circuit.

Under normal condition, Q16280 is on. When Q16280 is on, a low is provided to the anode of D16280
D280).
If one of the FPC cables is open, Q16280 turns off and a high is provided to the anode of D16280 (D280).
This high is provided to pin 66 of the CPU in the A board. When this happens, the TV shuts down and the
power LED blinks 8 times.
If any abnormality occurs in the sustain drive circuit, a high is provided to the anode of D16255. This high is
provided to pin 66 of the CPU in the A board. When this happens, the TV shuts down and the power LED
blinks 8 times.

To determine if the 8 blinks is caused by the A board, SS board, or the Panel:

• Isolate the SS board and check if the TV stays on when it’s turned on.

• If the TV does not stay on after disconnecting the SS board, the A board is defective.

• If the TV stays on, then the SS or the Panel is defective.

• If the anode of D16280 (D280) is high (2.7V) at the time the unit shuts down, the Panel might be

defective. (Check for loose connection between the flex-cables and the SS board).

• If the anode is low, the SS board is defective.

Slide 70

8 Blinks Error Detect Circuit

Vsus

P

P

A

A

Vda Vsus

P6
A6

P15V

3

3

P15V

5V

P11

1
4

ON

PANEL MAIN

SS11

Vsus

1
4

15V

IC16251

(8X) SOS

DETECT

SS

SS

Vsus pulse

ENERGY

RECOVERY

D16253

SS61

A32

6

SOS8

3
6

8

P5V

IC9004

STB_D3.3V

/ RESET

330

P5V

SOS8

SOS8

1

6

IC9003

PANEL CPU

66

C21

SS33

P5V

1 7

1 7

D16255

D16280

SOS8

Q16280

SS24

C23

C2

C2

SS64

SS21

SS58

SS2

SS2

Slide 71

Troubleshooting 8 Blinks Failure

Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on

the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin

indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the
TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

Start Here

Check all the cables between the SS board and the panel. Make sure they are properly seated in

the connectors. Unplug the TV and disconnect SS33 on the SS board. Plug in the TV and turn it on

Check connections between the SS, C2,
and A boards. If ok, replace the A board

No

No

Check connections between the SS board and the panel. Check also
connections between the SS 2 and the SS board and the panel. If ok,

then replace the panel

Does the TV

turn on and

stay on?

Is continuity ok

in all the connectors?

Yes

Yes

Unplug the TV. Check for continuity between

pins 1 and 2 of connectors SS61 and SS64 on

the SS board . On connector SS21, check

continuity between 6 and 7. (Go to the

previous slide to see picture of connectors

location). Do not plug in the TV.

Replace the SS

board

Slide 72

9 Blinks Error Code

This condition can cause the TV to shutdown and the power LED to blink 9 time

1. No communication between IC9300 and IC9003

Since both ICs are located on the A board, only the A board should be replaced

Slide 73

10 Blinks Error Code

These 4 conditions can cause the TV to shut down and the power LED to blink 10 times

1. Abnormalities of the F+15V.

Reasons:

 The A board is not generating the F+15V
 SUB Voltages are affected by the K board or by metal object present in the SD card slot..

2. Shorted Vsus.

3. Shorted Vda.

4. If connector P6 on the P board is not connected or properly seated.

5. Wrong diagnostic by the A board.

IMPORTANT: Unlike previous generations, there’s no 10 blinks error code at plug-in for this model.

When the A board is replaced, the TV turns on in aging mode by itself at plug in.

To troubleshoot a PDP TV that is shutting down and the power LED blinks 10 times:

 Find out if there is a shorted Vsus. (Measure resistance between Vsus and chassis ground.)
 Find out if there is a shorted Vda. (Measure resistance between Vda and chassis ground.)
 Find out if 15V is output at pin 7,8,or 9 of connector P6 of the P board. If no voltage is output, the P

board may be defective.
 If the F_STB_15V voltage is OK, it’s likely that the A board is defective.

Warning: The Vsus line has large capacitors that hold the charge for some time even after the TV has been turned off and

unplugged. When disconnecting P2/SC2 or P11/SS1, bleed the remaining charge of the Vsus before reconnecting the cable.
Use a 500 ohms/ 5W (At least) resistor to discharge the Vsus line before reconnecting P2/SC2 or P11/SS11.

Slide 74

P15V

IC603

POWER

POWER

CPU

CPU

Vda

F+15V

STB5V

P7

5

1

Vsus

7
8
9

P6

A7

A6

10 Blinks Error Detect Circuit

5

1

99

STB5V

SOS4_PS

7
8
9

F+15V

PA4701
(Fuse)

TV_SUB_ON

F15V

SOS4_PS

IC5610

1.8V

1.8V

IC5606

1.2V

1.2V

IC5608

5V

5V

L

SUB1.8V

SUB1.2V

SUB5V

RESET

RESET

3.3V

3.3V

L L L

Q4704

Q4704

Q4703

Q4703

IC5609

3.3V

3.3V

IC4700

Q4702

Q4702

SUB3.3V_A

STB_RST

STB3.3V

L

SOS10

IC8001-1

Nile-TCON

Nile-TCON

(SYSTEM

(SYSTEM

CPU)

CPU)

10 Blinks

A

STB3.3V

SUB3.3V

LED/

Remote

A1

3
1

P

SUB5V

IC5607

3.3V

3.3V

IC5605

3.3V

3.3V

IC5613

3.3V

3.3V

SUB3.3V_HDMI

SUB3.3V

SUB3.3V_SD

SD card
SLOT

JK8502

4

SUB5V

Slide 75

Troubleshooting 10 Blinks Failure

Cautions: Disconnect the AC Power prior to making any disconnection or connection.
If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on

the TV for a few seconds until the LED turns off.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin

indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the
TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

Start Here

Check the SD card slot for metal objects. Check also for bended pins. Make sure that connector P6 on the P board is properly connected. Unplug

the TV and remove connectors SS11 from the SS board and SC2 from the SC board. Plug in the TV and press the power switch

Unplug the TV and
reconnect connectors SS11
and SC2. Plug in the TV
and press the power switch

Is there

15V at pin 7 of

connector P6 at

the moment

the relay clicks ?

Replace the P

board

No

Replace the K

board

Does the TV

shut down with

10 blinks?

10 blinks

YesNo

No

Disconnect P35 from the P
board. Plug in the TV and press
the power switch.

Disconnect A1. Plug in the TV
and press the power switch

Does the

number of

blinks changes

to 7 blinks?

Replace the SC

board

Yes

Replace the A

board

Yes

7 blinks

Reconnect SS11. Plug in the
TV and press the power switch

No

Does

the TV

stay

on?

One of the C boards or the panel is

defective. Isolate the C board from the

panel to find out the problem

Does the TV

shut down

with 10
blinks?

Replace the SS

YesNo

Yes

board

Slide 76

Service Notes

Slide 77

Service Mode

While pressing the “VOLUME -” button of the main unit, press the “INFO” button
of the remote control three times within 2 seconds.

Service Mode Screen

Key command
[1] button...Main items Selection in forward direction
[2] button...Main items Selection in reverse direction
[3] button...Sub items Selection in forward direction
[4] button...Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward
direction ( + ), in reverse direction ( - )

How to exit:

Switch off the power with the “POWER” button on the main unit or the “POWER”
button on the remote control.

Slide 78

Self Check/Reset

1. Checks the communication IIC bus lines

2. Provides a SOS History

To Access the Self-Check Mode

To Access the Self-Check Mode, turn the TV on and while pressing “VOLUME ( - )” button on the

main unit, press the “OK” button on the remote control for more than 3 seconds.

main unit, press the “OK” button on the remote control for more than 3 seconds.

TV volume down & OK on remote only does a basic IC self check. It does NOT clear any unit
settings.

It does not clear channel programmed settings, picture settings, channel labels, LOCK mode
settings, or password.
Using this method, it shows the unit firmware version (Peaks 1.050 and GenX 1.00) and it checks
IC communications ONLY.
This is more useful to identify the firmware version without having to decode the info in the setup
menu About/Version screen.

To Exit the Self-Check Mode, Press and hold the Power button on the TV for 5 seconds or

To Exit the Self-Check Mode

disconnect the AC cord from the wall outlet.

disconnect the AC cord from the wall outlet.

, turn the TV on and while pressing “VOLUME ( - )” button on the

, Press and hold the Power button on the TV for 5 seconds or

Reset Procedure

Reset forces the TV to factory shipment setting.

Note: All customer programmed parameters will be erased.

To Reset the TV, Press and hold the “VOLUME ( - )”button on the TV and press the “MENU”

To Reset the TV

button on the remote control for more than 3 seconds.

button on the remote control for more than 3 seconds.

To Exit, Disconnect the AC cord from wall outlet.

To Exit

To Exit:

Disconnect the AC cord from wall outlet.

, Disconnect the AC cord from wall outlet.

, Press and hold the “VOLUME ( - )”button on the TV and press the “MENU”

Slide 79

Mirror Function

New

This feature allows the picture to be rotated 180° horizontally or 180° vertically.
When servicing plasma TVs with horizontal lines, this feature can help to determine if the A board is

causing the problem or not. For vertical lines problems, this feature can help to determine if the
problem is the A board or the panel. The rear cover does not have to be removed to do this.

If the position of the line/lines changes when performing this function, the A board is possibly
defective. If the line/lines do not move:

 For horizontal lines check between the panel and the SM board.
 For vertical lines, change the panel.

To enter the Mirror Function.

From the Service Mode Menu, select “OPTION”.
Press 3 or 4 to select “MIRROR”.
Press the VOLUME up or down button to change the Mirror’s data.
Data = 00 is the default data (Mirror feature is off)

Data = 01 The picture is flipped 180
Data = 02 The picture is flipped 180

° horizontally.

° vertically

Slide 80

Mirror Function

Picture flipped Horizontally

Normal View

Normal View Picture flipped Vertically

(Defective A board)

(Defective A board)

Slide 81

New

VSUS Adjustment With Remote Control

P

The new 2010 Plasma TV models do not require Vsus adjustment using the control in the power supply.
The Vsus can now be adjusted to 2 different levels (high or Low) using the remote control from within the
service mode menu. Perform this adjustment when the A board or the panel is replaced and to correct
conditions of uneven illumination level of pixels noticeable when a white signal is displayed.

To correct illumination unevenness, display a white screen and then change the settings between high
and low. If there is no change, set the adjustment to low. If an improvement is shown when setting the
adjustment to high, then keep the settings at high level.

If the picture seems normal with both high and low settings, then set the Vsus to “LOW”, even if the picture
looks brighter when set to “HIGH”. LOW is the default setting.

A

Slide 82

To adjust Vsus:

Enter the service mode.

VSUS Adjustment With Remote Control

Press 1 or 2 on the remote control to select Vsus from the main Items menu.
The Vsus menu appears showing whether is low or high. (Default setting is “LOW”).
At this point, the settings can not be changed.

To perform the adjustment, press the “OK” button on the remote control to
change the menu to Vsus “TEST” mode. Note: the data can now be changed
(Low or High). Press the Vol 1 or Vol+ button on the remote control to change to
“Low or High”. The data’s color changes to red when adjusted.

Note: The data can only be changed while in the “Vsus Test” mode.

If result of adjustment is satisfactory at this point, proceed to save the data by
pressing the number 3 on the remote control. This will change from the “Test”
menu to the “CONF” menu. Note: the Data is still red, indicating that it has not
been saved yet.
If no improvement is noticed, set the adjustment to “LOW”.

Data can not be changed in this mode

OK

Vol+

or

Vol-

3

Vol+ Vol-

or

Vol+

or

Vol-

4

To return to the Vsus “TEST” mode after entering the Vsus “CONF” mode, press
the number 4 on the remote control.
After changing the settings, make sure to save the data.
To save the data, while in the “CONF” menu, press the “OK” button on the
remote control. The data changes f rom red to black and the Vsus menu goes
back to normal mode. The adjustment is now completed.

OK

Data can not be changed in this mode

Slide 83

Troubleshooting

Slide 84

st

1

Preparation:

Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on

the TV for a few seconds until the LED turns off.

229.7K

Step Resistance Test - VFG and VFO (TPSC1) (TC-P42S2)

Disconnect AC Power prior to making any disconnection or connection.
Wait at least 2 minutes before the removal of any connector.

Procedure:

Using a digital meter, measure the
resistance between VFG (Floating
ground) and TPSC1 (Coil L851) on the
SC board.
The normal resistance should be
approximately 190K-Ohms or higher.
It may take a few seconds for the reading
to become stable.

Note: A low resistance reading indicates
a defective SM or SC board. To find out
which one is defective perform a
separate resistance test for the SC and
SM boards.

A Normal resistance reading does not
necessarily indicates that the boards are
100% functional.
Additional testing procedure are
required.

Slide 85

st

1

Preparation:

Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on

the TV for a few seconds until the LED turns off.

Step Resistance Test - 5V_F and VFG (TC-P42S2) (2 of 2)

Disconnect AC Power prior to making any disconnection or connection.
Wait at least 2 minutes before the removal/installation of any connector.

Procedure:

2.6K

Using a digital meter, measure the
resistance between VFG (Floating ground)
and pin 3 of IC724 (IC16724) on the SC
board.
The normal resistance should be
approximately 2.6 K-Ohms.

Note: A low resistance reading indicates a
defective SM or SC board. To find out which
one is defective perform a separate
resistance test for the SC and SM boards.

A Normal resistance reading does not
necessarily indicates that the boards are
100% functional.
Additional testing procedure are required.

Slide 86

nd

2

Only perform this test if abnormal readings are obtained from tests on the previous 2 pages

Preparation:

Disconnect AC Power prior to making any disconnection or connection.

Wait at least 2 minutes before the removal of any connector.
Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on
the TV for a few seconds until the LED turns off.

Step - SC Resistance Test (TC-P42S2) (1 of 3)

Procedure:

Remove the 4 VFG screws from the SM board. (See picture to the left.)
Remove SC41, SC42, and SC46 from the SC board. (See picture to the left.)

Resistance between VFG and (VFO) TPSC1

Using a digital meter, measure the resistance between VFG (pin 1 of
connector SC50) and TPSC1 (Coil L851) on the SC board. (See picture in the
next page.
It may take a few seconds for the reading to become stable.
The normal resistance should be over 30 M-Ohms (In lower range meters the
resistance may read open).

Resistance between VFG and 5V_F

Measure the resistance between VFG (Pin 1 of connector SC50) and 5V_F
(Pin 3 of IC 724) (See picture on page ???)
The normal resistance should be 2.6K.

Note: A low resistance reading indicates a defective SC board. A Normal
resistance reading does not necessarily indicates that the board is 100%
functional.
Additional testing procedure are required.

Slide 87

2

nd

Step - Resistance Test VFG and TPSC1 (TC-P42S2) (2 of 3)

30 M

Slide 88

2

nd

Step - Resistance Test VFG and 5V_F (TC-P42S2) (3 of 3)

2.6K

Slide 89

rd

3

Perform this test if the result of the SC board resistance test indicates a possible defective SM board

Preparation:

Disconnect AC Power prior to making any disconnection or connection.

Wait at least 2 minutes before the removal of any connector.
Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on
the TV for a few seconds until the LED turns off.

Step SM Resistance Test (TC-P42S2) (1 of 3)

Procedure:

Remove the 4 VFG screws from the SM board. (See picture to the left.)
Remove SC41, SC42, and SC46 from the SC board. (See picture to the left.)

Resistance between VFG and VFO (TPSC1)

Using a digital meter, measure the resistance between VFG (Plated screw
post) and VFO (pin 1 of connector SM42). (See picture in the next page.)
It may take a few seconds for the reading to become stable.
The normal resistance should be over 4 M-Ohms or higher (In lower range
meters the resistance may read open).

Resistance between VFG and 5V_F

Measure the resistance between VFG (Plated screw post) and 5V_F (Pin 5 of
connector SM42) (See picture on page 92)
The normal resistance should be 190K or higher.

Note: A low resistance reading indicates a defective SM board. A Normal
resistance reading does not necessarily indicates that the board is 100%
functional.
Additional testing procedure are required.

Slide 90

3

rd

Step - Resistance Test VFG and VFO (TC-P42S2) (2 of 3)

4M

Slide 91

3

rd

Step - Resistance Test VFG and 5V_F (TC-P42S2) (3 of 3)

190K

Slide 92

SM Board Isolation Procedure (1 of 3) (TC-P42S2)

This TV is designed to shutdown if the SM board is disconnected.
Disconnecting this board causes the unit to shutdown and the power LED to blink 7 times.
Unplugging any of the connectors SC41/SM41 and SC42/SM42, opens the interlocked connection between
VF_GND on the SC board. This floats point “CHA” triggering the SOS7 detect circuit. This outputs a high to
the A board through pin 20 of connector SC20 triggering the shutdown circuit.

SM

SM

SM41

SC

SC

SC41

Vsus

SC2

1

1

Vda Vsus

P15V

P2

P

P

P6

3

SM42

VF_G

SC42

CHA

Vscan

DETECT

15V/5V_F

DETECT

SC50

VF_G

SC20

15V

low

SOS7

35

20

A6

A

A20

6
7

29
30

1

A

P15V

P5V

IC9004

STB_D3.3V

/ RESET

SOS7

4 2916

3

3.3V

IC9003

PANEL CPU

68

5V

PANEL MAIN ON

Slide 93

SM Board Isolation Procedure (2 of 3) (TC-P42S2)

This procedure is useful when troubleshooting 7 blinks problems.

If the power LED continues to blink even after the TV is unplugged, press and hold the power switch
on the TV for a few seconds until the LED turns off.

To isolate the SM board is not necessary to remove any boards:

 Remove the 4 VF_GND screws on the SM board.
 Unplug connectors SC41, SC46, and SC42 on the SC board.
 Place the SC jig cable (TZSC09187) between pins 1 and 2 of connector SC50 on the SC board.

The SC test fixture (Jig) can be used when the
SM board is isolated. The jig is a small connector
with a jumper between pin 1 and pin 2. The part
number is TZSC09187.
It plugs into connector SC50 on the SC board.

Note: If the SC jig is not available, install a jumper between pins 1 and 2 of connector SC50 on the SC
board. (Remove the jig or the jumper after completing the isolation procedure). When this is done, the
display is completely black (No picture)

Slide 94

SM Board Isolation Procedure (3 of 3) (TC-P42S2)

Slide 95

TV’s Behavior After Connectors Removal

MODEL N0. TC-P42S2 (Connectors Removal on the SS + combination of

connectors on the SS board and SC board)

Connector Connector

SS11 TV Stays On

SS33 TV Stays On
SS11 SS33 TV Stays On
SS11 SC2 SOS 7 Blinks

SS33 SC2 SOS 7 Blinks
SS11 SS33 SC2 SOS 7 Blinks
SS11 SC20 SOS 6 Blinks

SS33 SC20 SOS 6 Blinks

SS33 SC2 SC20 SOS 6 Blinks
SS11 SS33 SC2 SC20 SOS 6 Blinks

Connector on

SC Board

Connector on

SC Board

Result

Note: If P6 is removed, the TV shuts down with 10 blinks.

If P7 is removed, the TV is dead (No power)

MODEL N0. TC-P42S2 (Connectors Removal on the SC Board)

Connector Connector

SC2 SOS 7 Blinks

SC20 SOS 6 Blinks
SC2 SC20 SOS 6 Blinks
SC2 C10 SOS 6 Blinks

SC20 C10 SOS 8 Blinks
SC2 SC20 C10 SOS 8 Blinks

MODEL N0. TC-P42S2 (Connectors Removal on the A Board)

Connector Connector Connector Result

A20 SOS 6 Blinks

A31 TV Stays On (L-side OK/R-side Black)

A32 SOS 6 Blinks
A20 A31 SOS 6 Blinks
A20 A32 TV Stays ON with Black Screen

A31 A32 SOS 6 Blinks
A20 A31 A32 TV Stays ON with Black Screen

Connector on

C1 Board

Result

Slide 96

Glossary

Resolution

Resolution is a combination of values that express the quality of displayed images. A display's
resolution is indicated by the number of dots in the horizontal and vertical directions of the screen,
such as 1024 x 768 dots. Higher values indicate clearer, sharper image reproduction. The larger the
screen size, the higher the required
resolution.

HD (high-definition) pa nel

The HD panel has a resolution of 1,366 x 768 pixels and an aspect ratio of 16:9. It is designed for
displaying the beautiful images of digital, high-definition broadcasts.

Full HD (high-definition) panel

The term "full-HD panel" refers to 1,920 x 1,080-pixel panels that display progressive images of full­specification HDTV signals without the use of up sampling.

Number of pixels

The number of pixels indicates the resolution of the Image. The number of pixels of a digital image is
expressed by the product of the number of pixels (dots) in the horizontal direction and the number of
pixels (dots) in the vertical direction. The higher the number of pixels, the better the image quality. For
plasma TVs and LCD TVs, the number of pixels is sometimes expressed by the following equation:
number of pixels in horizontal direction x number of pixels in vertical direction x 3 (R, G, B).

Pixel

A pixel is a tiny dot that forms the smallest basic unit of a displayed image. Digital images are
composed of pixels, with all of the text and images displayed on the screen consisting of dots. Digital
images are usually rendered by square pixels arranged vertically and horizontally in an orderly
manner.

Plasma panel

A key component of the plasma display. A plasma panel is a collection of millions of tiny fluorescent
lights. By firing these lights on and off at a rapid rate, the plasma panel produces images.

Slide 97

Glossary

THX

THX is a trade name of a high-fidelity sound reproduction standard for movie theaters, screening rooms,

home theaters, computer speakers, gaming consoles, and car audio systems. THX stands for Tomlinson

Holman's eXperiment.

The THX system is not a recording technology, and it does not specify a sound recording format: all
sound formats, whether digital (Dolby Digital, SDDS) or analog (Dolby Stereo, Ultra-Stereo), can be
"shown in THX." THX is mainly a quality assurance system.
THX-certified theaters provide a high-quality, predictable playback environment to ensure that any film
soundtrack mixed in THX will sound as near as possible to the intentions of the mixing engineer.

AVCHD
Advanced Video Codec High Definition is a high-definition and standard-definition recording format for

use in digital tape-less camcorders and digital cameras. It is based on the H.264/MPEG-4 AVC video
compression standard. Audio is stored in compressed form (Dolby AC-3). The container format for the
audio and video is MPEG transport stream.

H.264

H.264 is a standard for video compression, and is equivalent to MPEG-4 Part 10, or MPEG-4 AVC (for
Advanced Video Coding). As of 2008, it is the latest block-oriented motion-compensation-based codec

standard. The final drafting work on the first version of the standard was completed in May 2003.
The intent of the H.264/AVC project was to create a standard capable of providing good video quality at
substantially lower bit rates than previous standards (e.g. half or less the bit rate of MPEG-2, H.263, or
MPEG-4 Part 2), without increasing the complexity of design so much that it would be impractical or
excessively expensive to implement.

YUV

YUV is used for a specific analog encoding of color information in television systems
Y' stands for the luma component (the brightness) and U and V are the chrominance (color) components.

Slide 98

Glossary

YUV

Is The color encoding system used for analog television worldwide (NTSC, PAL and SECAM). The YUV
color space differs from RGB, which is what the camera captures and what humans view.

Composite Video and S-video

The original TV standard combined luma (Y) and both color signals (B-Y, R-Y) into one channel, which
uses one cable and is known as "composite video." An option known as "S-video" or "Y/C video" keeps
the luma separate from the color signals, using one cable, but with separate wires internally. S-video is a
bit sharper than composite video.

Component Video

When luma and each of the color signals (B-Y and R-Y) are maintained in separate channels, it is called
"component video," designated as YPbPr when in the analog domain and YCbCr when it is digital.

ASIC

An Application-Specific Integrated Circuit (ASIC) is an integrated circuit (IC) customized for a particular
use, rather than intended for general-purpose use.

Slide 99

The End

Slide 100