Panasonic VT20T Service Manual

E-Seminar

2010 VIErA (FHD 3D PDP)

VT20T series

3D Eyewear

Dongle (Wi-Fi)

1

Table of Contents

Lesson 1 Explanation about 3D Lesson 2 Chassis structure and Signal circuit Lesson 3 Picture Problem Lesson 4 Power Supply Circuit Lesson 5 Protection Circuit Lesson 6 Troubleshooting of Power Supply Circuit Lesson 7 Service Information

2

1. Explanation about 3D

3

1-1. 3D Format

Item

Frame Sequential Side by Side (SBS)

New

(FS)

3D Signal Method

Top & Bottom (T&B)

4/12

Checker Pattern Line by Line

Input HDMI Ver. 1.4

L

Image

R

Support Situation

Setting method HDMI Ver1.4：Auto

Remarks

BD contents use this FS format.

○○ ××

HDMI Ver/1.4/

HDMI Ver.1.3 under/

broadcasting

L R

HDMI Ver1.4：Auto

Other: User manual setting

Under HDMI

Ver.1.3/

broadcasting

L

R

○

User manual setting

BD-recorder cannot

accept this T&B

format.

Digital signal from

PC etc.

…

L R

Format used for PC

etc.

HDMI Ver.1.4

L

R

- Only HDMI Ver. 1.4 is possible for the automatic recognition of 3D signal.

- 3D signal is only for the digital input. (PC and an external analog input, etc. do not accept 3D signal.)

3D format has not been fixed yet.

If the customer use other brand DVD, please confirm the format and/or TV setting. For details, please confirm Operation Manual.

4

1-2. Full HD 3D Technology (1/2)

2/12

New

Panasonic selected the frame sequential method. This brings cinema-level images right into the living room, without the problems of image deterioration and blurring that were common to conventional 3D systems.

Original Master 3D images for theaters

Played with the Frame Sequential Method

60 Frames

(50 Frames : PAL)

For the right eye

1920

1080

For the left eye For the right eye

R

1920

1080

1920

1080

3D Blu-ray Disc

3D Blu-ray Disc Player

L

1920

1080

(Infrared Rays)

L

60 Frames

(50 Frames : PAL)

L

IR

3D special camera

R (right) and L (left) images are alternately displayed at high speed (60 (50:PAL) frames/secon d x 2 =120 (100: PAL) frames).

A special camera records images for the left and right eyes.

Full HD x 2

left

When viewed with special LCD shutter glasses (3D Eyewear), the brain creates the sensation of depth from the visual disparity to form 3D images.

Right

3D eyewear

For the left eye

5

1-2. Full HD 3D Technology (2/2)

Open/close timing of the liquid crystal shutter is controlled by receiving IR signals from the TV, which provide 3D expression of the images.

New

Single eye 60 (50) frames/sec x 2 : = 120 (100) frames/sec

IR (Infrared Rays )

Vision principle with 3D glasses

Image for left eye

Image for right eye

When you see a right image

When you see a left image

A right and left image is switched with glasses at high speed.

Recognized the stereoscopic vision according to parallaxes of right and left eyes.

Composite image

6

1-3. 3D Eyewear

New

5/12

Product Name SYNC system

IR receiving distance

: 3D Glass

: 120Hz Frame Sequential System

: about 3.2m

Power : Battery (CR2032) ※Battery Life : About 100Hrs

Nose Pad - A

Nose Pad - B

Kids Band

Screw

Battery Holder

n

io

t

n

e

t

a

n

io

t

n

e

t

Battery

Cover

7

2. Chassis Structure and Signal Circuit

8

2-1. Chassis Structure (With

different points form current model)

P50V10

SU

SC

Scan Drive

SD

C1

GK

Key Switch

Remote receiver, Power LED, C.A.T.S sensor

SD blue LED

Different points from current model

Power

Supply

C2

Digital Signal Processor, Format Converter,

Plasma AI, Su-field Processor

P

GL

K

S

Power Switch

A

C3

SS

Sustain

Drive

SS2

Sustain out

P50VT20

SU

SC

Scan Drive

SD

C1

Format Converter, Plasma AI, Sub-Field Processor

Transmitter for 3D eyewear

C5C4 C6

P

Power

Supply

D

C2

V

Remote receiver, Power LED

K

V

Additional Digital Tuner

Digital Signal Processor

SS

Sustain Drive

XＨ

A

C3

SS2

Sustain out

1. D board is added.

2. Power switch is moved from S board to A board.

3. V board is transmitter board for 3D eyewear.

4. XH board is used in China, Hong Kong.

New

9

2-2.

Signal Circuit

Summary

Input Source

TV tuner HDMI AV terminal SD card PC Ethernet

Video

Signal

Audio

Signal

Signal Processor

Video

Brightness Contrast Sharpness etc

Audio

Bass Treble Balance

Video /

control

data

Audio

Signal

Panel Drive

3D Picture

2D Picture

Speaker

Sound

New

Volume

10

2-3.

Signal Circuit Overview

Input Source

New

K

V

HDMI 1, 2, 3, 4

Tuner

PC IN

VIDEO 1/2 COMP 1/2

SD card

ETHERNET

AUDIO OUT

SPEAKER

XH

A

Power

switch

（L/R/

Woofer）

Signal Processor

D

SC

Panel Drive

SU

SD

C4

C1

Dual scan

C5

Panel

C2

C6

SS

SS2

C3

V : Transmitter K : LED, Remote controller

A : AV Terminal, PC, Ethernet

Tuner, HDMI Interface HDMI Switch Digital Signal processor Systrem MPU Peaks LDA2

XH : Additional Digital Tuner

D : Format Converter

Plasma AI, Sub-Field Processor

SC: Scan Drive SU: Scan Out (Upper) SD: Scan Out (Lower) SS: Sustain Drive

SS2: Sustain Out

C1: Data Drive (Lower Right) C2: Data Drive (Lower Center) C3: Data Drive (Lower Left)

C4: Data Drive (Upper Right) C5: Data Drive (Upper Center) C6: Data Drive (Upper Left)

11

2-4.

Video signal processing

TU6700/6701

Tuner

(Digital)

TU2901

Tuner

(Analog/

Digital)

JK3701

VIDEO 2

JK3000

VIDEO 1

COMP 1

COMP 2

JK3001

PC IN

JK8703

ETHERNET

JK8700

USB

IC6702

2ndFront End Processor

A

IC8300

OFDM

V

Y,C / V

Y,Pb, Pr

Y,Pb,Pr

R,G,B / H,V

XH

IC3001

IC2601

SWITCH

JK4503

HDMI 1

VIDEO

JK4500 JK4501 JK4502

HDMI 2 HDMI 3

Data

IC8000

Peaks

-LDA2

Video Signal Processor

LOSD

Y,Pb,Pr

IC4500

HDMI

zer

Equali & switch

HDMI 4

LVDS

Data

JK8600

SD Card

IC1100

SYSTEM

GenX8

IC4200

FRC

MPU

LVDS

Data

New

IC5800

MIHO-3D

n

o

i

t

n

e

t

a

LVDS Data (right)

LVDS Data

(left)

a

t

e

n

t

i

o

n

D

IC9400 PD4H

Slave

DATA Processor

Right picture

IC9300

PD4H

Master

DATA Processor

Left picture

Discharge control

Analog Digital

New

IC9003

PANEL

MICOM

To SC

board

To C

boards

To SC

board

To C

boards

IC3001 : Video Switch

IC4500 : HDMI Equalizer & switch

IC1100 : System MPU IC8300 : OFDM

nd

IC6702 : 2

Front End Processor

New

IC8000 : Video Signal Processor IC4200 : Frame Rate Converter IC5800 : Conversion (SBS-->FS system)

LVDS selector

IC9003 : Panel MICOM IC9300 : Plasma AI, HV Sync control

New

Sub Field Processor (Left)

IC9400 : Plasma AI, H/V Sync control,

Sub Field Processor (Right)

12

2-5.

Panel Drive

IC9400 PD4H

DATA Processor

New

Right picture

IC9300 PD4H

DATA Processor

New

Left picture

D

34

D

31

D

20

D

33

D

32

SUS CONTROL PULSE

VIDEO

DATA

SCAN CONTROL PULSE

VIDEO DATA &

DATA TIMING PULSE

SC

20

Voltage Reg.

VIDEO

DATA

SCAN Drive Signal

ICs

SU

IC14601 IC14602 IC14603 IC14604 IC14605 IC14606

SU11 SU12

IC14801 IC14802 IC14803 IC14804 IC14805 IC14806

SD

C4

CA1 CA2

SCAN

ELECTRODE

1080 Pixel

CB1 CB2

C１

C5

C40C

50

CA3

CA4 CA5 CA6 CA7 CA8 CA9

C51 C61

C6

C56C

66

CA10 CA11CA12CA13CA14CA15

Left pictureRight picture

(1920 x 1080) (1920 x 1080)

SUSTAIN

ELECTRODE

1080 Pixel

DATA ELECTRODE

1920pixel (R,G,B)

CB4 CB5 CB6 CB7 CB8 CB9CB10CB11CB12CB13CB14 CB15

CB3

C21

C26C

36

C3

C31

C

10

C

20

C2

SS21 SS24

C

33

SUS CONTROL PULSE

SUS Drive Signal

ICs

Voltage Reg.

SS2

SS

SS33

IC14601-IC14608 : SHIFT REGISTER (UPPER)

IC14801-IC14808 : SHIFT REGISTER (LOWER)

13

3. Picture Problem

14

3-1.

Abnormal Picture (Sound OK)

Where

abnormal

picture

is

displayed ?

Flow of video signal

Local

Area

ALL Area

Upper half

or

Lower half

Left / Center/

Right

Corner

All over the

screen

Upper half

Lower half

Both Lower half

and Upper half

(For checking,Test pattern is useful.)

SU Board ( or A or D or SC)

SD Board ( or A or D or SC)

SS Board ( or A or D )

C or A

or D ( or

Panel )

A or D or SC or

SS board or Panel

Right

Center

Left

(Front view)

SS

SS2

C6

C3

C5

C2

456

123

C1

C4

SU

SD

SC

A

D

15

3-2. Test patterns

Not available at 3D mode condition. Change setting mode from 3D to 2D.

How to show Test Pattern

１.Press the “VOLUME-” on the TV set and push “０” button of remote controller 3 times at the same time.

2. After this procedure, you can enter “Service Mode” and select “Aging”, then “Test pattern” will appear.

3. Push “3" button of Remote Controller to select the test pattern mode to forward.

4. Push “4“ button of Remote Controller to select the test pattern mode to reverse.

Normal Test Pattern

TIME

0

1:R/G/B/W (with character)

2: Black

A board

(with character)

0

3:White

18:Dark red19:Dark green20:Dark blue

4:White

17:White Frame

5:Red

6:Green 7:Blue

D board

15:A and B zone16:Scrolll

8:ON/OFF Aging

9:Ramp white

12:Ramp Blue13 :1% window14:Color bar

a

t

e

n

t

i

o

n

10:Ramp Red

11:Ramp Green

Where are Test Patterns generated ?

A board

Test Pattern

1-3

Nos.1-3 are generated in A board and Nos.4-20 are generated in D board.

D board

Test Pattern

Panel

4-20

How to separate defective board

Check

Test Patterns (4-20)

Abnormal

D or C board or Panel will be defective.

Normal

A board will be defective.

16