Panasonic EURO 4 Chassis Quick start guide

Order No. TZS8EL001

Technical Guide

Colour Television

EURO 4 Chassis

Circuit Explanations

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CONTENTS

1. Introduction 3....................................................

2. Power Supply Block Diagram 4....................................

3. Control Block Diagram 5..........................................

4. Video Block Diagram 6............................................

5. Standard Audio Block Diagram 7...................................

6. Audio & Dolby Block Diagram 8....................................

7. Dolby Block Diagram 9............................................

8. Power Supply 10..................................................

9. Horizontal and Vertical Outputs 17...................................

10. A.F. Output Stage 21...............................................

11. Colour Output Stage 22............................................

12. RF/IF Section 25..................................................

13. Microprocessor and Teletext Processing 27...........................

14. EAROM Memory IC 37.............................................

15. EPROM 38.......................................................

16. Control Of The Digital Section 39....................................

17. Video Display Processor 40........................................

18. M-Board Processing 55............................................

19. AV Switching 57...................................................

20. Audio Signal Processing 58.........................................

21. History Of Dolby Pro Logic 67.......................................

22. Pro Logic Processing Overview 68..................................

23. Pro Logic Encoding and Decoding Concepts 69.......................

24. Dolby Pro Logic Processor (DPL3519A) 72...........................

25. C-Board Processing 80............................................

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1. Introduction

We at Panasonic realise that the service engineer

needstounderstandthecircuitryinsidetheTVandfor

this need, we have produced this Technical Guide.

This Technical Guide contains information for

EURO 4 chassis and should be used in-conjunction

with the relevant Service Manuals for this chassis.

As the Technical Guide for the Euro4 chassis covers

such awide range of models, some differences occur

in circuit descriptions and component reference

numbers. Where these differences occur they will be

highlighted by (

Italic text with brackets

ode

Spec

ifi

ode

Spec

ifi

POWER SUPPLY BLOCK DIAGRAM

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H - BOARD

D868

T801

D850

TUNER

Q850

IC851 D454

Q853

IC1104 IC1101

IC1102 IC2101

T802 RL801

IC107

823

12V

200V

33V

-14V

14V

27V

150

29V

15V

D867

Q852

Q854

Q855

D805

R805 R814

IC850

D862

R854

33V

REMOTE

CONTROL

RECEIVER

RESET

MICRO

PROCESSOR Audio

Processor Video

Processor

EPROM EAROM RESET

REG

7Video

Switching

CORRECTION

POWER

SUPPLY

RGB

V-OUTPUT

AUDIO

OUTPUT

D801

E - BOARD Y - BOARD

1Y2

2E19

1R802

DEGAUSS

COIL

Line

Filter

E62

1 2

IC2404

IC2403

1 3

IC2401

IC2702

18V

-18V

T2701

R2714 Q2702

Q2701 R2715

S22V

E11

5K2

3C1

Q2701

K - BOARD

C - BOARD

IC1051

REMOTE

CONTROL

RECEIVER

ode

Spec

ifi

ode

Spec

ifi

E19

E61

E18

SDA 1

SCL 1

SDA 2

SCL 2

SERVICE / TEST

IC2101

IC1101

TUNER

IC601

IC1103

50 SCL 2

SDA 2

SDA 1

SCL 1

SCL SDA

48 49

IC3401

LOCAL

KEYS

SWITCH

MATRIX

IC1071

AV2

AV1

AV LINK

SLOW 2

SLOW 1

SCL 1

SDA 1

5955

VPROT

KEYSCAN

R.C.

L.E.D.

PROT 1

SLOW 2

OUT

SLOW 1

SERVICE

SCL

SDA

H - BOARD

E - BOARD

VIDEO

SWITCHING AUDIO

PROCESSOR

MICROPROCESSOR

VIDEO

PROCESSOR

EAROM

REMOTE

CONTROL

RECEIVER

N - BOARD

8 8

IC2401

E11

4 4

K - BOARD

IC1051

REMOTE

CONTROL

RECEIVER Model Specific

3. CONTROL BLOCK DIAGRAM

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Dolby

Processor

Q105

AV1

IC601

9LGHR



2XW

9LGHR





AV2

AV3

Q3601

IC1101

R 37

CVBS

61 V IN

43 B IN

42 G IN

41 R IN

62 VIN 2

60 C IN

63 VIN 3

VIN 4

64 VIDEO OUT

B IN 47

B OUT 39

Q30

Q301

Q353

CRT

IC351

Q104

5HG

%OXH

*UHHQ

9LGHR



$9



9LGHR



2XW

G OUT 38

R OUT 37

G IN 46

R IN 45

Q30

Q302

COILS

Q905 Q907 Q909

Q908

Q906

SVM OUT 34

Q950 Q951

Q3001

G 38

B 39

Y - BOARD

E - BOARD

RGB

OUTPUT

VIDEO

PROCESSOR

MICRO

PROCESSOR

H3E61

E15

IC3401

Q3402

Q3401

H - BOARD

VIDEO

SWITCHING

ode

ifi

4. VIDEO BLOCK DIAGRAM

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TUNER

Q101

Q102

IC2101 IC251

Q2102

Q2103

AV3

AV1

DACM_R 24

SC3_IN_L 37

SC1_OUT_R 30

SC1_OUT_L 31

5 R

R 7 6 R

1 R OUT

3 L OUT

1 R OUT

3 L OUT

2 R IN

6 L IN

2 R IN

6 L IN

47 ANA_IN1+

44 MONO IN

DACM_L 25

SC3_IN_R 38

SC1_IN_R 42

SC1_IN_L 41

SC2_OUT_R 27

SC2_OUT_L 28

SC2_IN_R 40

SC2_IN_L 39

Q252

Q251

2 L L 11 4 L

HEADPHONE

7 R

5 L

Q2304

Q2302

21 DACA_R

22 DACA_L

E - BOARD

AUDIO

PROCESSOR AUDIO

OUTPUT

AUDIO

MONITOR

OUT

Q2303

Q2301

49 ANA_IN2+

Q103

X101

X102

Model

Specific

Model

Specific

5STANDARD AUDIO BLOCK DIAGRAM

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DACA_R

DACA_L

E12

To K7

TUNER

X101

X102

Q101 Q102

IC2101

49 ANA_IN2+

IC251

2102

Q2103

AV3

AV2

AV1

DACM_R 24

SC3_IN_L 37

SC1_OUT_R 30

SC1_OUT_L 31

5 R

R 7

1 R OUT

3 L OUT

2 R IN

6 L IN

2 R IN

6 L IN

47 ANA_IN1+

44 MONO IN

DACM_L 25

SC3_IN_R 38

SC1_IN_R 42

SC1_IN_L 41

SC2_OUT_R 27

SC2_OUT_L 28

SC2_IN_R 40

SC2_IN_L 38

Q252

Q251

2 L L 11

HEADPHONE

2 R

3 L

Q2304

Q2302

21 DACA_R

22 DACA_L

E12

I2S_DA_IN_2 18

I2S_DA_IN_1 12

I2S_DA_OUT 11

I2S_DA_WS 10

I2S_DA_CL 9

I2S_DA_IN_2

I2S_DA_IN_1

I2S_DA_OUT

I2S_DA_WS

I2S_DA_CL

E23

To K3

From K8

H_LEFT

H_RIGHT

E - BOARD

Model Specific

6. AUDIO & DOLBY BLOCK DIAGRAM

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JK2702

To E12 K3

12 IC2401

Q2432 Q2425

Q2426 Q2428

Q2401 Q2402

Q2403 Q2404 Q2405 Q2406

2221

27 JK2401

IC2402

To E22 K7

K8 To E23

IC240413

IC2704

IC2703

IC2702

JK2402

Q2410

Q2409

Audio Left

Audio Right

Headphone Left

Headphone Right

Surround

Centre

Woofer

Surround L

Centre

Surround R

Woofer

Surround L

Centre Out

Left Front

Surround R

Right Front

Q2427 Q2424

Q2423Q2422

Q2419

Q2418

Q2417

Q2421

Q2420

I2S_DAOUT_2

I2S_DA_OUT_1

I2S_DA_IN

I2S_WS

I2S_CL

Q2704

Q2703

Q2705

C-Board

K-Board

7. DOLBY BLOCK DIAGRAM

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8. POWER SUPPLY

The supply voltage in the EURO 4 chassis is

provided by the integrated circuit STR-F6654.

As well as the main power supply a standby power

supply is also used. The benefits of which result in a

reduction in the power consumption when in standby

mode.

The mains A.C. voltage is input via connector E1

and fed to the standby transformer T802, via the

main TV ON/OFF switch S801.

At the standby transformer T802 the A.C. supply

splits into two paths.

The first path sees the A.C. supply being fed to the

normally open contact of the standby relay RL801.

The second path has the A.C. supply being fed via

the windings P1/P2 of the standby transformer

T802.

8.1. Standby Power Supply Circuit

The standby transformer T802 has the A.C. supply

as just mentioned being fed via the primary winding

P2/P1.

From the output of the secondary windings S2/S1 of

the standby transformer, a 5V standby supply is fed

via resistor R860, where the supply takes two paths.

1. The first path that the standby supply follows is

via capacitor C869 and rectifying diode D868,

this supply is then smoothed by capacitor C870.

This rectified and smoothed supply is then again

split into two paths.

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