Panasonic TX-32PX10D, TX-32PX10F, TX-32PX10P, TX-28PX10D, TX-28PX10F Schematic

ORDER No. 03-SM-012

Service Manual

Colour Television

TX-32PX10D, TX-32PX10F,

TX-32PX10P

TX-28PX10D, TX-28PX10F

EURO- 9L Chassis

SPECIFICATIONS

(Information in brackets [ ] refers to models 28”)

Power Source: 220-240V a.c., 50Hz

Power Consumption: 114W [105W]

Stand-by Power Consumption: 0,6W

Aerial Impedance: 75Ω unbalanced, Coaxial Type

Receiving System: PAL-I, B/G, D/K, PAL-525/60

SECAM B/G, D/K, L/L’ M.NTSC (AV only) NTSC (AV only)

Receiving Channels:

VHF E2-E12 VHF H1-H2 (ITALY) VHF A-H (ITALY) VHF R1-R2 VHF R3-R5 VHF R6-R12 UHF E21-E69 CATV (S01-S05) CATV S1-S10 (M1-M10) CATV S11-S20 (U1-U10) CATV S21-S41 (HYPERBAND)

Intermediate Frequency: Video/Audio

Video 38,9MHz, 33,9MHz Sound 33,4MHz (B/G), 33,16MHz (A2)

33,05MHz (NICAM B/G,D/K,L) 32,4MHz (D/K),32,66MHz (CZ STEREO) 40,4MHz (L’), 39,75MHz (L’NICAM)

Colour 34,47MHz (PAL)

34,5MHz, 34,65MHz (SECAM) 38,3MHz, 38,15MHz (SECAM L’)

Terminals:

AUDIO MONITOR OUT Audio (RCAx2) 500mV rms 1kΩ

AV1 IN Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 10kΩ RGB (21 pin) 0,7V p-p 75Ω

AV1 OUT Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 1kΩ

AV2 IN Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 10kΩ S-Video IN Y: 1V p-p 75Ω (21-pin) C:0,3V p-p 75Ω

AV2 OUT Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 1kΩ

AV3 IN S-Video IN Y: 1V p-p 75Ω

(4-pin) C:0,3V p-p 75Ω Audio (RCAx2) 500mV rms 10kΩ Video (RCAx1) 1V p-p 75Ω

AV4 IN Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 10kΩ RGB (21 pin) 0,7V p-p 75Ω S-Video IN Y: 1V p-p 75Ω (21-pin) C:0,3V p-p 75Ω

AV4 OUT Video (21 pin) 1V p-p 75Ω

Audio (21 pin) 500mV rms 1kΩ

High Voltage: 32kV ± 1kV [30,5kV ± 1kV]

Picture Tube: W76ELE50X71 76cm

[W66EKT50X71 66cm]

Audio Output: 2x10W RMS, 2x20W MPO,

8Ω impedance

Headphones: 8Ω Impedance

Accessories supplied : Remote Control

2 x R6 (UM3) Batteries

Dimensions:

Height: 567mm [510mm] Width: 902mm [776mm] Depth: 550mm [530mm]

Net weight: 56,5kg [42,5kg]

Specifications are subject to change without notice. Weights and dimensions shown are approximate.

CONTENTS

SAFETY PRECAUTIONS ......................................................................................................................................................... 2

SERVICE HINTS ...................................................................................................................................................................... 3

ADJUSTMENT PROCEDURE AND SELF-CHECK.................................................................................................................. 4

WAVEFORM PATTERN TABLE............................................................................................................................................... 5

ALIGNMENT SETTINGS .......................................................................................................................................................... 6

BLOCK DIAGRAMS.................................................................................................................................................................. 7

PARTS LOCATION................................................................................................................................................................. 12

REPLACEMENT PARTS LIST................................................................................................................................................ 13

SCHEMATIC DIAGRAMS....................................................................................................................................................... 29

CONDUCTOR VIEWS ............................................................................................................................................................ 34

SAFETY PRECAUTION

GENERAL GUIDE LINES

1. It is advisable to insert an isolation transformer in the a.c. supply before servicing a hot chassis.

2. When servicing, observe the original lead dress in the high voltage circuits. If a short circuit is found, replace all parts that have been overheated or damaged by the short circuit.

3. After servicing, see that all the protective devices such as insulation barriers, insulation papers, shields and isolation R-C combinations are correctly installed.

4. When the receiver is not being used for a long period of time, unplug the power cord from the a.c. outlet.

5. Potentials as high as 33kV [31,5kV] are 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 who is not familiar with the precautions necessary when working on high voltage equipment. Always discharge the anode of the tube.

6. After servicing make the following leakage current checks to prevent the customer from being exposed to shock hazard.

LEAKAGE CURRENT COLD CHECK

1. Unplug the a.c. cord and connect a jumper between the two prongs of the plug.

2. Turn on the receiver’s power switch.

3. Measure the resistance value with an ohmmeter, between the jumpered a.c. 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 4M ohm and 20M ohm. When the exposed metal does not have a return path to the chassis, the reading must be infinite.

LEAKAGE CURRENT HOT CHECK

1. Plug the a.c. cord directly into the a.c. outlet. Do not use an isolation transformer for this check.

2. Connect a 2kΩ 10W resistor in series with an exposed metallic part on the receiver and an earth, such as a water pipe.

3. Use an a.c. voltmeter with high impedance to measure the potential across the resistor.

4. Check each exposed metallic part and check the voltage at each point.

5. Reverse the a.c. plug at the outlet and repeat each of the previous measurements.

6. The potential at any point should not exceed 1,4 Vrms. In case a measurement is outside 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.

HOT CHECK CIRCUIT

a.c. VOLTMETER

2kΩ 10 Watts

TO INSTRUMENT'S EXPOSED METALLIC PARTS

Fig. 1.

X-RADIATION WARNING

1. The potential sources of X-Radiation in TV sets are the high voltage section and the picture tube.

2. When using a picture tube test jig for service, ensure that the jig is capable of handling 33kV [31,5kV] without causing X-Radiation.

NOTE: It is important to use an accurate periodically

calibrated high voltage meter.

1. Set the brightness to minimum.

2. Measure the high voltage. The meter should indicate:

32kV ± 1kV [30,5kV ± 1kV]. If the meter indication is out of tolerance, immediate service and correction is required to prevent the possibility of premature component failure.

3. To prevent any X-Radiation possibility, it is essential to use the specified tube.

WATER PIPE

(

EARTH)

ALIGNMENT SETTINGS

(The figures below are nominal and used for representative purposes only.)

1. Set the Bass to maximum position, set the Treble to minimum position, set the Volume to minimum then press the down button (-/v) on the customer controls at the front of the TV and at the same time press the INDEX button on the remote control, this will place the TV into the Service Mode 1.

2. Press the RED / GREEN buttons to step up / down through the functions.

3. Press the YELLOW / BLUE buttons to alter the function values.

4. Press the STR button after each adjustment has been made to store the required values.

5. To exit the Service Mode, press the "N" button.

Alignment Function

Horizontal Position

Vertical Position

Horizontal Amplitude

Vert. Amplitude

EW-amplitude

Lower Corner

Trapezium-comp

Upper Corner

Vertical Symmetry

Vertical Linearity

Setting indication

Note: All setting values are approximate

H-Pos

V-Pos

H-Amp

V-Amp

-66

EW-Amp 1

- 25

Lower Corner

Trapez 1

-7

Upper Corner

-2

V-Sym

-4

V-Lin

Settings / Special features

Optimum setting.

Angle

Bow

DVCO

Highlight

Lowlight

Sub-Brightness

Angle

-2

Bow

DVCO

-1

High 0403 0318 0350 Low 0071 0132 0160

Sub-Brightness

Optimum setting.

Receive a PAL Colour Bar Pattern. For DVCO alignment press "Blue" button, wait until the colours are changing slowly and press "STR".

Optimum setting.

Y5A

Q1705 Q1708

R OUT

Q1704 Q1707

G OUT

Q1703 Q1706

B OUT

6 4 3 5

SENSE

CRT

IC1701

IC1501

R EXT

7A48

7H48

VIDEO BLOCK DIAGRAM

R EXT

DEFLECTION

PROCESSOR

DDP3315CQAE3

G EXT

G EXT11B EXT

0÷Y7

8bit

Y0÷Y7

IDEO SIGNAL

PROCESSOR

VSP9405VKB11

B EXT

MAIN Y/CVBS

52 53

B OSD

G OSD

R OSD

114

112

113

MICRO

IC1101

PROCESSOR

SDA6000-A23

MAIN C

Q3013

AV2 VIDEO OUT

MAIN Y/CVBS

Q3301

121

TEXT CVBS

Q1125

Q3016

MAIN C

A - BOARD

Q3011

H - BOARD

L - BOARD

D - BOARD

Q351

IC351

R OUT

G - BOARD

IC361

G OUT

IC371

B OUT

IC3001

CXA2069Q

AV4

Y/VIDEO IN 20

MATRIX

IDEO/AUDIO

V3 CVBS

Q3014

VIDEO OUT 19

C/RED IN 15

TUNER CVBS

BLUE IN 7

GREEN IN 11

V3 C

15 20 21 22

VIDEO

TUNER

1 2 4

AV3

AV1

IC3301

2G13

VIDEO IN 20

MATRIX

RGB & FB SW

TDA8601T/C1

Q3015

BLUE IN 7

RED IN 15

GREEN IN 11

VIDEO OUT 19

AV2

24, 22

AV1 VIDEO IN

Y/VIDEO IN 20

17, 15

AV2 Y/ VIDEO IN

VIDEO OUT 19

10, 8

AV2 C IN

AV4 C IN

AV4 Y/ VIDEO IN

C IN 15

TUNER

MSP

Q102

Q101

102

101

Q106

IC251

LA4282

R OUT 7

L OUT 11

AUDIO OUTPUT

2 L IN

5 R IN

4 1

D17

4 1

G16

G14

AV3

HEADPHONE

2 L

3 R

IC2001

NA IN 1

60 MONO IN

UDIO

PROCESSOR

78 D CTRL

MSP3410GAB83

AV3 R

25D124

25H124

AV3 L

TUNER L

TUNER R

R OUT

L OUT

8 8

AUDIO BLOCK DIAGRAM

24 25

SPKR OUT L

SPKR OUT R

HP L

HP R

Q2005

Q2002

Q2003

Q2004

6 7 16 14

D - BOARD

G - BOARD

IC2351

NJM4556AD

OP. AMPLIFIER

3 HP L

5 HP R

HP L 1

HP R 7

H - BOARD

AV1

AV3 R2AV3 L

AV1 R IN

RIGHT IN 2

AV1 L IN

LEFT IN 6

TUNER R

IC3001

CXA2069Q

AV1 L OUT

AV1 R OUT

LEFT OUT 3

RIGHT OUT 1

TUNER L

MAIN R

MATRIX

IDEO/AUDIO

Q3010

Q3009

MAIN L

Q3006

Q3005

AV2 L IN

AV2 R IN

LEFT IN 6

AV2

RIGHT IN 2

AV2 R OUT

RIGHT OUT 1

AV4 L IN

AV4 R IN

AV2 L OUT

AV4

LEFT IN 6

LEFT OUT 3

RIGHT IN 2

LEFT OUT 3

RIGHT OUT 1

OUT

AUDIO

MONITOR

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