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
).
M
ode
l
Spec
ifi
c
M
ode
l
Spec
ifi
c
2.
4
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
5V
5V
5V
5V
8V
4
3
823
4
3
1
S
S
1
9
6
2
6
1
6
12V
200V
33V
-14V
14V
27V
150
29V
7V
15V
5V
D867
Q852
Q854
Q855
1
D805
R805 R814
IC850
1
2
D862
R854
33V
REMOTE
CONTROL
RECEIVER
-
RESET
MICRO
PROCESSOR Audio
Processor Video
Processor
EPROM EAROM RESET
REG
REG
REG
7Video
Switching
EW
CORRECTION
POWER
SUPPLY
RGB
V-OUTPUT
AUDIO
OUTPUT
D801
E - BOARD Y - BOARD
E8
1Y2
1
N1
2E19
2
E1
4
1
E2
2
1R802
DEGAUSS
COIL
Line
Filter
E62
1 2
4
IC2404
8
IC2403
1 3
3
5
6
1
4
IC2401
4
IC2702
35
3
5
3
5
S
S
F
P
18V
-18V
T2701
P
3
R2714 Q2702
Q2701 R2715
S22V
E11
5K2
5
77
E5
3C1
3
Q2701
K - BOARD
C - BOARD
IC1051
REMOTE
CONTROL
RECEIVER
M
ode
l
Spec
ifi
c
M
ode
l
Spec
ifi
c
N1
4
E19
4
H3
1
E61
1
E18
6
5
4
3
SDA 1
SCL 1
SDA 2
SCL 2
SERVICE / TEST
IC2101
IC1101
TUNER
IC601
IC1103
6
5
50 SCL 2
SDA 2
4
3
SDA 1
SCL 1
SCL SDA
48 49
8
7
4
3
IC3401
71
LOCAL
KEYS
SWITCH
MATRIX
60
52
74
IC1071
81
AV2
8
10
AV1
8
10
12
75
51
72
73
AV LINK
SLOW 2
SLOW 1
SCL 1
SDA 1
58
5955
VPROT
KEYSCAN
R.C.
L.E.D.
PROT 1
SLOW 2
OUT
IN
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
7
8
K2
3
E11
3
4 4
K - BOARD
IC1051
REMOTE
CONTROL
RECEIVER Model Specific
3. CONTROL BLOCK DIAGRAM
5
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Dolby
Processor
Q105
AV1
IC601
9LGHR
2XW
9LGHR
,Q
AV2
AV3
Q3601
IC1101
R 37
68
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
59
B IN 47
B OUT 39
Q30
Q301
E8
4
3
5
Q353
CRT
3
2
1
7
8
9
Y2
4
3
5
IC351
Q104
5HG
%OXH
*UHHQ
9LGHR
,Q
$9
&
9LGHR
2XW
G OUT 38
R OUT 37
G IN 46
R IN 45
Q30
Q302
7
7
VM
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
1
6
8
H1
1
6
8
IC3401
Q3402
Q3401
8
6
5
H - BOARD
VIDEO
SWITCHING
M
ode
l
S
p
ec
ifi
c
4. VIDEO BLOCK DIAGRAM
6
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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
L
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
E6
1
E7
3
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
7
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3
4
DACA_R
DACA_L
E12
To K7
E7
3
E6
1
TUNER
X101
OR
X102
Q
1
03
Q101 Q102
IC2101
49 ANA_IN2+
IC251
Q
2102
Q2103
AV3
AV2
AV1
DACM_R 24
SC3_IN_L 37
SC1_OUT_R 30
SC1_OUT_L 31
5 R
L
R
R 7
1 R OUT
3 L 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
3
4
5
6
7
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
3
1
To K3
From K8
H_LEFT
H_RIGHT
R
L
E - BOARD
Model Specific
Model Specific
6. AUDIO & DOLBY BLOCK DIAGRAM
8
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JK2702
To E12 K3
3
4
5
19
11
12 IC2401
Q2432 Q2425
Q2426 Q2428
K5
1
3
5
C2
1
3
5
Q2401 Q2402
Q2403 Q2404 Q2405 Q2406
25
24
2221
27 JK2401
1
3
5
7
14
12
10
8
IC2402
To E22 K7
1
3
C5
1
K8 To E23
1
3
IC240413
57
IC2704
IC2703
IC2702
K6
1
JK2402
Q2410
Q2409
1
1
1
4
4
4
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
6
7
10
9
I2S_WS
I2S_CL
Q2704
Q2703
Q2705
C-Board
K-Board
7. DOLBY BLOCK DIAGRAM
9
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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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