Panasonic TX-29P250T Service Manual ▷ View online
Power Source
AC Auto 220 V, 50/60 Hz
Power Consumption
209 W
Standby condition : 0.5 W
Receiving System
Function
Reception
Reception
of
broadcast
transmissios and Playback from
Video Cassette Tape Recorders
Video Cassette Tape Recorders
Playback from special VCRs
Playback from Special Disc Players
and Special VCRs
and Special VCRs
21 Systems
1 PAL B, G, H
2 PAL I
3 PAL D, K
4 SECAM B, G
5 SECAM D, K
6 SECAM K1
7 NTSC M (NTSC 3.58/4.5 MHz
8 NTSC 4.43/5.5 MHz
9 NTSC 4.43/6.0 MHz
9 NTSC 4.43/6.0 MHz
10 NTSC 4.43/6.5 MHz
11 NTSC 3.58/5.5 MHz
12 NTSC 3.58/6.0 MHz
13 NTSC 3.58/6.5 MHz
11 NTSC 3.58/5.5 MHz
12 NTSC 3.58/6.0 MHz
13 NTSC 3.58/6.5 MHz
14 SECAM I
15 PAL 60 Hz/5.5 MHz
16 PAL 60 Hz/6.0 MHz
17 PAL 60 Hz/6.5 MHz
16 PAL 60 Hz/6.0 MHz
17 PAL 60 Hz/6.5 MHz
18 SECAM 60 Hz/5.5 MHz
19 SECAM 60 Hz/6.0 MHz
20 SECAM 60 Hz/6.5 MHz
19 SECAM 60 Hz/6.0 MHz
20 SECAM 60 Hz/6.5 MHz
21 NTSC 50 Hz/4.5 MHz
Receiving Channels
Regular TV
TX-29P250T
EURO7 Chassis
CATV
2-12 (PAL/SECAM B, K1)
0-12 (PAL B AUST.)
1-9 (PAL B N.Z.)
1-12 (PAL/SECAM D)
1-12 (NTSC M Japan)
2-13 (NTSC M U.S.A.)
21-69 (PAL G,H,I/SECAM G,K,K1)
28-69 (PAL B AUST.)
13-57 (PAL D,K)
13-62 (NTSC M Japan)
14-69 (NTSC M U.S.A.)
S1-S20 (OSCAR)
1-125 (U.S.A. CATV)
C13-C49 (JAPAN)
S21-S41 (HYPER)
Z1-Z37 (CHINA)
4A, 9A (AUST.)
Receiving Stereo System
NICAM I, NICAM B/G, NICAM D,
A2 (German)
Tuning System
Frequency synthesizer
Auto Search Tuning
POSITION : 100 Position
DIRECT : 125 Position
High Voltage
31.0 ± 1.0 kV at zero beam
current
Colour Television
Specification
Order No. MTV0103127C3
Picture Tube
Overall Picture tube measured
diagonally : 72 cm
Viewable Picture tube measured
diagonally : 68 cm
CRT Deflection : 104°
Audio Output
64 W [2-way, 4-speaker; 12 W +
12 W, AFB woofer; 12 W External
Speakers; 7 W + 7 W + 7 W + 7
W] (10% THD)
Headphones
3.5 mm Plug
Aerial Impedance
75
Ω
Unbalanced Coaxial
1
Safety Precautions
4
1.1.
General Guide
4
1.2.
Leakage Current Cold Check
4
1.3.
Leakage Current Hot Check (See Fig. 1)
4
1.4.
X-Radiation
4
2
SERVICE HINTS
6
2.1.
HOW TO REMOVE THE REAR COVER
6
2.2.
LOCATION OF CONTROLS
6
2.3.
HOW TO MOVE THE CHASSIS INTO SERVICE
POSITION
6
2.4.
HOTEL MODE
6
2.5.
Service Position for DG-Board
7
3
SELF CHECK
8
4
SERVICE MODE FUNCTION
9
4.1.
HOW TO ENTER SERVICE 1
9
4.2.
HOW TO ENTER SERVICE 2
9
5
ADJUSTMENT PROCEDURE
13
5.1.
VOLTAGE CONFIRMATION
13
5.2.
E.H.T CHECK
13
5.3.
SUB CONTRAST
13
Video/Audio/Component Terminals
AV 1, 2, 3, 4
Monitor Out
AV1 IN (Rear) : S-Video, Video,
Audio L/R terminals
AV2 IN (Rear) : Video or Y/P
Audio L/R terminals
AV2 IN (Rear) : Video or Y/P
B
/P
R
Audio L/R terminals
AV3 IN (Front) : S-Video, Video,
Audio L/R RGB terminals
AV4 IN (Rear) : Video or Y/P
AV3 IN (Front) : S-Video, Video,
Audio L/R RGB terminals
AV4 IN (Rear) : Video or Y/P
B
/P
R
,
Audio L/R terminals
Digital Audio input : coaxial, optical
Digital Audio input : coaxial, optical
S-Video In Y:1 Vp-p, 75
Ω
C:0:3 Vp-p 75
Ω
DVD (Y/P
B
/P
R
)
Video In 1 Vp-p, 75
Ω
Audio In Approx 0.4 V 47 k
Ω
Video Out 1 Vp-p, 75
Ω
Audio Out Approx. 0.4 V 1 k
Ω
RGB Input
High-DENSITY D-sub 15 pin
31.5 kHz/60 Hz (640x480 dot) and
31.5 kHz/70 Hz (640x400 dot)
Remote Control Transmitter
R6 (AA) Battery x 2
75
Ω
coaxial aerial plug
Dimensions (WxDxH)
652 mm x 517 mm x 612 mm
Weight (Mass)
53 kg (Net)
Note:
Design and Specifications are subject to change without notice. Weight
and Dimensions shown are approximate.
Design and Specifications are subject to change without notice. Weight
and Dimensions shown are approximate.
5.4.
SUB TINT
14
5.5.
SUB COLOUR
15
5.6.
SECAM BLACK LEVEL
15
5.7.
VRS ADJUSTMENT
16
5.8.
COLOUR PURITY
17
5.9.
CONVERGENCE
17
5.10. CUT OFF
18
5.11. WHITE BALANCE
19
5.12. Focus
19
5.13. Geomagnetic
19
5.14. SUB BRIGHT
19
6
DEFLECTION ADJUSTMENT
20
6.1.
V-ADJUSTMENT/CONFIRMATION (4:3 MODE)
20
6.2.
H-DEFLECTION CONFIRMATION/ADJUSTMENT (4:3
MODE)
21
6.3.
PINCUSSION ADJUSTMENT/CONFIRMATION (4:3
MODE)
22
6.4.
V LINIALITY ADJUSTMENT / CONFIRMATION (4:3
MODE)
23
CONTENTS
Page
Page
2
TX-29P250T
6.5.
DEFLECTION (16:9 MODE) ADJUSTMENT /
CONFIRMATION
24
6.6.
525p DEFLECTION ADJUSTMENT / CONFIRMATION
24
6.7.
625p DEFLECTION ADJUSTMENT
25
6.8.
VGA480 / 60 Hz DEFLECTION ADJUSTMENT /
CONFIRMATION
25
6.9.
VGA400 / 70 Hz DEFLECTION ADJUSTMENT /
CONFIRMATION
26
6.10. TABLE 1
27
7
LOCATION OF LEAD WIRING
28
8
CONDUCTOR VIEWS
31
8.1.
A-Board
31
8.2.
8.2 D-Board
34
8.3.
8.3 DG-Board
36
8.4.
DP-Board
38
8.5.
GK-Board
39
8.6.
DF-Board and GM-Board
40
8.7.
H-Board and L-Board
41
8.8.
U-Board and Z-Board
42
9
BLOCK DIAGRAM
43
9.1.
POWER BLOCK DIAGRAM
43
9.2.
CONTROL BLOCK DIAGRAM
45
9.3.
AUDIO BLOCK DIAGRAM
46
9.4.
VIDEO BLOCK DIAGRAM
48
9.5.
IC BLOCK DIAGRAM
49
10 SCHEMATIC DIAGRAMS
55
10.1. SCHEMATIC DIAGRAM NOTES
55
10.2. A-BOARD (1/5) SCHEMATIC DIAGRAMS
56
10.3. A-BOARD (2/5) SCHEMATIC DIAGRAMS
57
10.4. A-BOARD (3/5) SCHEMATIC DIAGRAMS
58
10.5. A-BOARD (4/5) SCHEMATIC DIAGRAMS
59
10.6. A-BOARD (5/5) SCHEMATIC DIAGRAMS
60
10.7. D-BOARD (1/2) SCHEMATIC DIAGRAMS
61
10.8. D-BOARD (2/2) SCHEMATIC DIAGRAMS
62
10.9. DF-BOARD SCHEMATIC DIAGRAM
63
10.10. DG-BOARD (1/4) SCHEMATIC DIAGRAMS
64
10.11. DG-BOARD (2/4) SCHEMATIC DIAGRAMS
65
10.12. DG-BOARD (3/4) SCHEMATIC DIAGRAMS
66
10.13. DG-BOARD (4/4) SCHEMATIC DIAGRAMS
67
10.14. DP-BOARD (1/2) SCHEMATIC DIAGRAMS
68
10.15. DP-BOARD (2/2) SCHEMATIC DIAGRAMS
69
10.16. GK-BOARD SCHEMATIC DIAGRAMS
70
10.17. GM-BOARD SCHEMATIC DIAGRAMS
71
10.18. H-BOARD SCHEMATIC DIAGRAMS
72
10.19. L-BOARD (1/2) SCHEMATIC DIAGRAMS
73
10.20. L-BOARD (2/2) SCHEMATIC DIAGRAMS
74
10.21. U-BOARD (1/2) SCHEMATIC DIAGRAMS
75
10.22. U-BOARD (2/2) SCHEMATIC DIAGRAMS
76
10.23. Z-BOARD (1/2) SCHEMATIC DIAGRAMS
77
10.24. Z-BOARD (2/2) SCHEMATIC DIAGRAMS
78
11 PARTS LOCATION
79
3
TX-29P250T
1 Safety Precautions
1.1. General Guide
1. It is advisable to insert an isolation transformer in the AC
supply before servicing a hot chassis.
2. When servicing, observe the original lead dress, especially
the lead dress in the high voltage circuits. If a short circuit is
found, replace all parts which have been overheated or
damaged by the short circuit.
found, replace all parts which have been overheated or
damaged by the short circuit.
3. After servicing, see to it that all the protective devices such
as insulation barriers, insulation papers, shields, and
isolation R-C combinations, are properly installed.
isolation R-C combinations, are properly installed.
4. When the receiver is not to be used for a long period of
time, unplug the power cord from the AC outlet.
5. Potential, as high as 32.0 kV is present when this receiver
is in operation. Operation of the receiver without the rear
cover involves the danger of a shock hazard from the
receiver power supply. Servicing should not be attempted
by anyone
cover involves the danger of a shock hazard from the
receiver power supply. Servicing should not be attempted
by anyone
who is not thoroughly
familiar with the
precautions necessary when working on high voltage
equipment. Always discharge the anode of the picture tube
to the receiver chassis before handling the tube.
equipment. Always discharge the anode of the picture tube
to the receiver chassis before handling the tube.
6. After servicing make the following leakage current checks to
prevent the customer from being exposed to shock
hazards.
hazards.
1.2. Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two
prongs on the plug.
2. Turn on the receiver’s power switch.
3. Measure the resistance value, with an ohmmeter, between
the jumper AC plug and each exposed metallic cabinet part
on the receiver, such as screw heads, aerials, connectors,
control shafts, etc. When the exposed metallic part has a
return path to the chassis, the reading should be between 4
M
on the receiver, such as screw heads, aerials, connectors,
control shafts, etc. When the exposed metallic part has a
return path to the chassis, the reading should be between 4
M
Ω
Ω
Ω
Ω
and 20 M
Ω
Ω
Ω
Ω
. When the exposed metal does not have a
return path to the chassis, the reading must be infinite.
1.3. Leakage Current Hot Check
(See Fig. 1)
1. Plug the AC cord directly into the AC outlet. Do not use an
isolation transformer for this check.
2. Connect a 2k
Ω
, 10 W resistor in series with an exposed
metallic part on the receiver and an earth such as a water
pipe.
pipe.
3. Use an AC voltmeter, with high impedance type, to
measure the potential across the resistor.
4. Check each exposed metallic part, and measure the
voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the
above measurements.
6. The potential any point should not exceed 1.0 V rms. In the
case of a measurement being outside of the limits specified,
there is a possibility of a shock hazard, and the receiver
should be repaired and rechecked before it is returned to
the customer.
there is a possibility of a shock hazard, and the receiver
should be repaired and rechecked before it is returned to
the customer.
1.4. X-Radiation
Warning :
1. The potential sources of X-Radiation in TV sets are the EHT
section and the picture tube.
2. When using a picture tube test rig for service, ensure that
4
TX-29P250T