Panasonic TC-32LX600, TC-26LX600, TC-32LX60, TC-26LX60, TC-23LX60 Service Manual

Service Seminar

Service Seminar

(Circuit Explanation of LCD for Latin America)

(Circuit Explanation of LCD for Latin America)

Model

Model

DATE

DATE

: TC-32/26LX600

: TC-32/26LX600

: Oct 23-24, 2006

: Oct 23-24, 2006

TC-32/26LX60

TC-32/26LX60

TC-23LX60

TC-23LX60

CS Promotion Center

Panasonic 　 AVC 　 Networks Company

Contents

<Review of E-Seminar>

1. LCD Line-up for Y2006

2. Chassis Structure

3. Explanation for Signal Circuit

4. Explanation for Power Supply Circuit

5. Troubleshooting

Contents

<Hands on for LCD>

1. Typical Trouble Example

2. The Idea of Diagnosis for LCD

3. Introduction of Jig

<Review of E-Seminar>

1. LCD Line-up for Y2006

1-1-1. LCD Line-up for Y2006 (USA)

2005

32LX50

26LX50

23LX50

19LX50

26LE55

23LE55

23LE50

STEP UP

LEADER

Derivative Model

2006

TC-32LX600

TC-26LX600

TC-32LX60

TC-26LX60

TC-23LX60

TC-32LE60

TC-26LE60

19LE50

20LA5

20LE50

20LE5

4:3

1-1-2. LCD Line-up for Y2006 (Canada)

2005

32LX50

26LX50

23LX50

19LX50

STEP UP

LEADER

2006

TC-32LX600

TC-26LX600

TC-32LX60C

TC-26LX60C

TC-23LX60

23LE50

20LA5

20LE50

20LE5

Derivative Model

/ 4:3 Model

TC-32LE60

TC-26LE60

1-1-3. LCD Line-up for Y2006 (Latin America)

2005

32LX50

26LX50

19LX50

20LA5

2006

TC-32LX60L

LEADER

TC-26LX60L

4:3 Model

1-1-4. LCD Line-up for Y2006 (Mexico)

2005

32LX50

26LX50

19LX50

20LA5

2006

TC-32LX60C

LEADER

TC-26LX60C

4:3 Model

1-2. Product Summary

Screen Size

ATSC

Panel

Video Processor

PC input

LX50

32/26/23/19

―

VA panel

GC4PRO(32/26)

GC3FM(23/19)

―

LX60C/L

32/26

No

IPS Panel

Micronas VCTP *

――POD (CATV)

――SD card

―

LX60

32/26/23

Yes (except 23”)

IPS Panel

Micronas VCTP *

―

―

―

LX600

32/26

Yes

IPS plus panel

Micronas VCTP *

w/ Vivid mode

―

―

―

HDMI

Cosmetic

Color

Others

1 (32/26)

LX50 design

Gray

1 (w/HDAVI **)

LX60 design

Black & silver

* Video-Controller-Text Progressive ** Not available in LX60L

1 (w/HDAVI)

LX60 design

Black & silver

2 (w/HDAVI)

LX60 design

All Black

Demo mode

2. Chassis Structure

2-1. Location of PC board

SP

Inverter

SP

Current 32/26LX50

P

DG

DV

(HDMI)

AP

H

G

V

SP

K

New LX600/LX60

Control Unit

AP

SP

G

Inverter

SP

32”/26”only 23” only

32/26/LX600, 32/26LX60 only

A

(HDMI)

DT

P

SP

V

K

Differences from LX50:

1. DT board is introduced. (32/26LX600, 32/26LX60 only)

2. The function of DG, H, and DV board are combined to A board.

3. The location of G board, AP board and P board are changed.

2-2. Function of PC board

FunctionBoard Name

Digital TunerDT

32/26LX600

32/26LX60

Yes

Yes

Yes

Yes

Yes

Yes

Yes

32/26LX60C

32/26LX60L

23LX60

YesYesMAIN (Signal Processor, HDMI)A

YesYesPower (Board Change Only)P

YesYesDC-DC ConverterAP

YesAV3 Terminal, HeadphoneG

YesHeadphoneK

YesYesLED, Remote ReceiverV

YesYesKEYSCAN, Power SWControl Unit

3. Explanation for Signal Circuit

3-1. Differences from Current Models

Current 32/26LX50

DG

H

MPU

AUDIO

SWITCH

LVDS

GC4L

GC4
PRO

SOUND
CONTROL

Differences from LX50:

DV

VIDEO

SWITCH

HDMI

A

AUDIO

SWITCH

New LX600
New LX60

FPGA

VCTP

HDMI

(CEC)

* 32/26/LX600, 32/26LX60 only

DT*

ATSC

1. The function of H, DG, and DV board is merged into A board.

2. VCTP and FPGA are introduced instead of VIDEO SW, SOUND CONTROL,
MPU, GC4PRO, GC4L and LVDS as shown in yellow color.

3. DT board is introduced. (32/26LX600, 32/26LX60 only)

4. CEC circuit for HDAVI Control is added on A board. (except 32/26LX60L)

3-2-1. Video Signal Flow (LX600/LX60 except 23LX60)

LX600 only

A

DT

TUNER

IC8211

ATSC

LSI

HDMI1

HDMI2

IC8240

PEAKS

LITE

IC5004

HDMI

I/F

Included OSD

Y/C
(for Monitor Out)

Digital

IC4801

DT_VOUTENB

IC4001

OSD

VCTP

OSD

Analog
Digital

AV1

AV2

COMPONENT

Monitor Out

G AV3

Analog

(*) LVDS : Low Voltage Differential Signaling

VIDEO

SWITCH

VIDEO

PROCESSOR

LVDS

LVDS

IC????

IC4004

FPGA

LCD

Panel

LVDS

3-2-2. Video Signal Flow (32/26LX60C/L)

A

TUNER

AV1

AV2

COMPONENT

HDMI

Analog

IC5004

HDMI

I/F

Analog
Digital

Digital

IC4001

OSD

VCTP

OSD

VIDEO

PROCESSOR

VIDEO

SWITCH

Monitor Out

G AV3

IC????

IC4004

LVDS

FPGA

LCD

Panel

LVDS

(*) LVDS : Low Voltage Differential Signaling

LVDS

3-2-3. Video Signal Flow (23LX60)

A

TUNER

AV1

AV2

COMPONENT

HDMI

Analog

IC5004

HDMI

I/F

Analog
Digital

Digital

IC4001

OSD

VCTP

OSD

VIDEO

PROCESSOR

VIDEO

SWITCH

Monitor Out

G AV3

IC????

IC4004

LVDS

FPGA

LCD

Panel

LVDS

(*) LVDS : Low Voltage Differential Signaling

LVDS

3-3-1. Audio Signal Flow (LX600/60 except 23LX60)

LX600 only

IC4001

A

DT

TUNER

Digital
Audio OUT

IC8211

ATSC

LSI

HDMI1

HDMI2

IC8240

PEAKS

LITE

IC8200

Audio

DAC

IC5004

HDMI I/F

IC8232

Audio

SW

IC8244

Audio

ADC

L/R

VCTP

MSP

SW

IC2006

L/R

L/R

IC2001

Audio

AMP

IC2005

HP

AMP

L/R

Analog
Digital

L

R

AV1

AV2

DVI (Analog)

Audio In

Monitor Out

G AV3

Headphone

L/R

L/R

L/R

L/R

L/R

L/R

L/R

AUDIO

SWITCH

3-3-2. Audio Signal Flow (32/26LX60C/L)

A

TUNER

AV1

AV2

DVI (Analog)

HDMI

IC2202

IC5004

HDMI I/F

L/R

L/R

L/R

L/R

IC4001

VCTP

MSP

SW

IC2006

AUDIO

SWITCH

L/R

L/R

L/R

L/R

IC2001

Audio

AMP

IC2005

HP

AMP

Analog
Digital

L

R

L/R

Audio In

Monitor Out

G AV3

Headphone

L/R

L/R

L/R

3-3-3. Audio Signal Flow (23LX60)

A

TUNER

AV1

AV2

DVI (Analog)

HDMI

IC2202

IC5004

HDMI I/F

L/R

L/R

L/R

L/R

IC4001

VCTP

MSP

SW

IC2006

AUDIO

SWITCH

L/R

L/R

L/R

L/R

IC2001

Audio

AMP

IC2005

HP

AMP

Analog
Digital

L

R

L/R

Audio In

Monitor Out

K AV3

Headphone

L/R

L/R

L/R

4. Explanation for Power Supply Circuit

4-1. Differences in Power Supply

The Function of P and AP board

P board function

1. AC input

2. Standby circuit

3. Circuit for Inverter and for AP board’s regulator

AP board function

1. Regulator circuit (DC-DC conversion)

Differences of Power Supply in LX600 and all LX60 models

Voltages

P board output

AP board output for Tuner

32/26LX600

32/26LX60

24V
10V

STB7V

30V

MAIN 9V

MAIN5V

18.5V

32/26LX60C

24V
10V

STB7V

30V

MAIN5V

18.5V

24V

STB7V

30V

MAIN5V

23LX6032/26LX60L

120V100V~240V120V120VAC voltage

24V
33V

STB7V

30V

MAIN5V

16.5V18.5VAP board output for Audio AMP

4-2-1. Power Supply Outline (LX600/LX60 except 23LX60)

A12

51-53

54,57

A1

4
7

STB 3.3V

MAIN 3.3V

MAIN 2.5V

MAIN 1.5V

MAIN 1.8V

MAIN 3.3V

MAIN 5V

CN1

3
1

P

SUB_ON

Line

Filter

MAIN

Trans

Relay

24V

10V

RELAY

STB

Trans

STB_7V

Relay

24V

CN3

1-3

4,5

13 13

11

12

CN2

AP2

1-3

4,5

11

12

Q7223
Q7224

AP1

1-9

AP

AP5

24V

IC7209

9V

IC7218

18V

IC7210

9V

IC7205

5V

IC7212

12V

24V

1-4

1-4

INVERTER

24V

SUB_9V

SOUND_18V

Q7301

MAIN_9V

Q7450

MAIN_5V

Q7303

PANEL_12V

Q7701
Q7702

AP7

Q7212

MIX

Power SW

LCD Panel

12V

AP3

7

2,3
17-19
21,22

AP4 A4

3

22

8

6

R

7

15

111211

PANEL 12V

INV ON

A3

7

2,3
17-19
21,22

3

22

8

6

7

15

12

A2

28-31

A5

3

BT_30V

SOUND 18V

STB7V

SUB9V

MAIN 5V

IC1806

IC1807

IC1803

IC4002

Q1801
Q1802

MAIN 9V

MAIN 8V
MAIN 5V

STB 3.3V

STB 1.8V

MAIN 3.3V

IC1805

IC1804

IC5005

DT12

BT_30V

88

51-53

54,57

2

8

1

101

102 MAIN_ON

161

11

7

MAIN_9V

MAIN_5V

LED(R)

V1

4

STB_3.3V

7

LED(R)

LED(R)

IC4001
(VCTP)

VCTP_RESET

SUB9VSENSE

SUB_ON

KEY_SCAN
POWER

105

IC1102
(EEPROM)

IC4004
(FPGA)

FPGA_OK

97

PANEL _ON

INV_ON

IC4003
(PROM)

IC4005
(PLL)

DT

V