Panasonic TX-34P180RB Manual de usuario

Power Source AC AUTO 110-240 V, 50/60 Hz

Power Consumption 130 W

Standby condition : 1.0 W

Receiving System 17 Systems

Function

Reception of broadcast

transmissions and Playback

from Video Cassette Tape

Recorders

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)

Playback from Special Disc 15 PAL 60 Hz/5.5 MHz

Players and Special VCRs 16 PAL 60 Hz/6.0 MHz

17 PAL 60 Hz/6.5 MHz

Receiving Channels Regular TV

VHF BAND 2-12 (PAL/SECAM B, K1)

0-12 (PAL B AUST.)

1-9(PALBN.Z.)

1-12 (PAL/SECAM D)

1-12 (NTSC M Japan)

2-13 (NTSC M U.S.A.)

UHF BAND 21-69 (PAL G,H,I/SECAM G,K,K1)

28-69 (PAL B AUST.)

13-57 (PAL D,K)

rights reserved. Unauthorized copying and

distribution is a violation of law.

TX-34P180RB-

MIDDLE EAST

GP21 Chassis

13-62 (NTSC M Japan)

14-69 (NTSC M U.S.A.)

CATV 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 30.5 ± 1.0 kV at zero beam current

Picture Tube Overall Picture tube measured

diagonally : 72 cm

Viewable Picture tube measured

diagonally : 68 cm

CRT Deflection : 104°

Audio Output 10 W × 2 = 20 W

Headphones 3.5 mm Plug

Aerial Impedance 75 ΩUnbalanced Coaxial

VIdeo/Audio/Component

Colour Television

Specifications

Order No. MTV0601457CE

Terminals

AV 1, 2 S-Video In Y:1 Vp-p, 75 Ω

C:0:3 Vp-p 75 Ω

DVD Y1.0 Vp-p, 75 Ω

PB0.7 Vp-p, 75 Ω

PR0.7 Vp-p, 75 Ω

AV 1, 2, 3, 4 Video In 1 Vp-p, 75 Ω

Audio In Approx 0.5 V 47 kΩ

Monitor Out Video Out 1 Vp-p, 75 Ω

1 SAFETY PRECAUTIONS 3

1.1. General Guide 3

1.2. Leakage Current Cold Check 3

1.3. Leakage Current Hot Check (See Fig. 1) 3

1.4. X-Radiation 4

1.5. GP21 Chassis Block Diagram 5

2 SERVICE HINTS 6

2.1. HOW TO REMOVE THE REAR COVER 6

2.2. HOW TO MOVE THE CHASSIS INTO SERVICE

POSITION 6

2.3. HOTEL MODE 6

3 ADJUSTMENT PROCEDURE 8

3.1. VOLTAGE CONFIRMATION 8

3.2. E.H.T CHECK 8

3.3. SUB CONTRAST 8

3.4. VRS ADJUSTMENT 9

3.5. COLOUR PURITY 10

3.6. CONVERGENCE 10

3.7. CUT OFF ADJUSTMENT & SUB CONTRAST

CONFIRMATION 11

3.8. WHITE BALANCE 11

3.9. Focus 12

3.10. SUB BRIGHT 12

Audio Out Approx. 0.5 V 1 kΩ

RGB Input High-DENSITY D-sub 15 pin

Remote Control Transmitter R6 (AA) Battery x 2

Dimensions (W×D×H) 75 Ωcoaxial aerial plug

899 mm x 567 mm x 674.9 mm

Weight (Mass) 65 kg (Net)

Note :

Design and Specifications are subject to change without notice. Weight

and Dimensions shown are approximate.

4 DEFLECTION ADJUSTMENT 13

4.1. V-DEFLECTION ADJUSTMENT / CONFIRMATION (4:3

MODE) / (16:9 MODE for wide models) 13

4.2. H-DEFLECTION CONFIRMATION / ADJUSTMENT 14

4.3. EW ADJUSTMENT / CONFIRMATION (4:3 MODE) / (16:9

MODE for Wide models) 16

4.4. V-LINEAR ADJUSTMENT/CONFIRMATION (4:3 MODE) /

(16:9 MODE for wide models) 17

4.5. DEFLECTION (16:9 MODE) CONFIRMATION 17

4.6. DEFLECTION (16:9 MODE) CONFIRMATION. 18

4.7. TABLE 1 19

5 CONDUCTOR VIEWS 20

5.1. D-Board 20

6 SCHEMATIC DIAGRAMS 21

6.1. SCHEMATIC DIAGRAM NOTES 21

6.2. D BOARD 23

6.3. L BOARD 28

6.4. A BOARD 32

6.5. G BOARD 37

7 PARTS LOCATION 40

8 REPLACEMENT PARTS LIST 41

8.1. Replacement Parts List Notes 41

8.2. REPLACEMENT PARTS LIST 42

CONTENTS

Page Page

TX-34P180RB- / MIDDLE EAST

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.

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.

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 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.

6. After servicing make the following leakage current checks to

prevent the customer from being exposed to shock

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

MΩ

ΩΩ

Ωand 20 MΩ

ΩΩ

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 2kΩ, 10 W resistor in series with an exposed

metallic part on the receiver and an earth such as a water

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.

TX-34P180RB- / MIDDLE EAST

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

the rig is capable of handling 32.6 kV 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 reading should

indicate 32.5 ± 1 kV. 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 the possibility of X-Radiation, it is essential to

use the specified picture tube.

TX-34P180RB- / MIDDLE EAST

1.5. GP21 Chassis Block Diagram

SDA

SCL

RGB In

CVBS Out

Video In

MON Out

CVBS In

VCTP

Audio

Amp.

Audio

Amp.

VCTP

PVP

DDP

CRT

Board defl.coil CRT

Tuner

GP21 BLOCK DIAGRAM

Audio

15V

(Audio Amp)

15V

10.5V

6.5V

137V

10.5V

(H-Drive Circuit)

3.3V

standby

1.8V

standby

6.5V

(G-Board)

13.3V

137V

Switching

Transformer

Primary

Live

Circuit

MON

Audio

Out Audio

Out

Audio Amp

(Woofer)

left speaker

right speaker

woofer

option line

Indication

option device

RGB Out

reg

Q865

RGB Out

Vert

H Out

H-Output

EEPROM

RGB Out

CVBS In

Vertical

Output

RGB In

TX-34P180RB- / MIDDLE EAST

2 SERVICE HINTS

2.1. HOW TO REMOVE THE REAR

COVER

1. Remove the 9 screws as shown in Fig. 1.

2.2. HOW TO MOVE THE CHASSIS

INTO SERVICE POSITION

1. Hold and lift the rear of the chassis and gently pull the

chassis towards you as shown in Fig. 3.

2. Release the respective wiring clips and rotate the chassis

vertically through 90° anticlockwise.

3. After servicing replace the bead clamper and ensure all

wiring is returned to its original position before returning the

receiver to the customer.

2.3. HOTEL MODE

Purpose

1. At Hotels, this Mode prevents the customer from changing

the TV preset data such as Channel preset data.

Note: This Mode is useful for Hotels. You should not get

into “Hotel mode” with Normal use.

Operation

1. To get into “Hotel Mode”, press the remote control “Recall”

button and Channel Up “[+/ ]” key on the TV set

simultaneously, after setting the “Off-Timer” mode.

2. In this mode, the Channel Up and Down Function will be

enabled as normal and the maximum volume level for this

TX-34P180RB- / MIDDLE EAST

mode is set at the current volume level, ie the setting at the

level before entering the mode. However, other functions

will be disabled.

To exit this mode, exit “Off-Timer” mode and the “Volume

Down [-/ ]” key simultaneously.

* This information is informed by Service Manual only.

TX-34P180RB- / MIDDLE EAST

3.1. VOLTAGE CONFIRMATION

Item / preparation

1. Operate the TV set.

2. Set controls :

Brightness ........... minimum

Contrast ............... minimum

Adjustment procedure

1. TPD 023 ~ GND : 136.0 ± 1.0V

2. TPD 21 ~ GND : 10.8 ± 1.0V

3. TPD 012 ~ C858 (-)(GND) : 16.5 ± 2.0V

3.2. E.H.T CHECK

Item / preparation

1. Receive an RF signal, window or crosshatch pattern.

2. Set the Brightness and Contrast to minimum (0 Beam)

3. Connect the High Voltage Voltmeter to the CRT ANODE

CAP.

4. The set should be switched to AV (no input) contrast and

brightness minimum.

Adjustment procedure

1. Check the EHT voltage is (30.5±1.0) kV.

2. Switch from AV mode to TV.

3. With the Brightness and the contrast controls MAX, check

that the high voltage does not drop more than 3.0kV from

the above measurement with R.F signal.

3.3. SUB CONTRAST

Item / preparation

1. Receive PAL colour bar pattern..

2. Connect oscilloscope to A21 pin 3

3. Set controls:.

BRT................CENTER

COLOUR........CENTER

CONTRAST....MAX

AI....................OFF

Adjustment procedure

1. Adjust Sub Contrast (Service 1) :

A=1.85± 0.2V.

2. Adjust Video gain 2 (Service 1) so that Sub picture level B

becomes as same as Main picture level A.

3 ADJUSTMENT PROCEDURE

TX-34P180RB- / MIDDLE EAST

3.4. VRS ADJUSTMENT

1.PREPARATION

•

• •

• Set DY to CRT not to tilt up and down and left and right deflection. (Fig. 1)

•

• •

• Set CY to CRT and set CY magnet primarily.

Pur Mg: Set Pur Mg that 2 magnets are top position

VRS Mag: Set VRS Mg that 2 magnets are horizontal position

•

• •

• Set geomagnetic correction DAC [0].

2.ADJUSTMENT

•

• •

• Receive the white balance pattern.

•

• •

• Adjust V-CENTER.

•

• •

• Set R, B CUT OFF to minimum, and set G CUT OFF to center.

•

• •

• Receive the aging pattern

•

• •

• Set 2 magnet of vertical position to up and down equally so that center part of CRT (Fig 2)

TX-34P180RB- / MIDDLE EAST

3.5. COLOUR PURITY

1. Operate the TV set for over 60 minutes.

2. Receive a purity pattern signal. (white pattern)

3. Set Bright and Contrast controls to their maximum

positions.

4. Set V-POS to 128.

5. Adjust roughly the static convergence magnets.

6. Fully degauss the picture tube using an external

degaussing coil.

7. Loosen a clamp screw for the Deflection Yoke and move

the Deflection Yoke as close to the purity magnet as

possible.

8. Adjust the purity magnet so that a vertical green field is

obtained at the center of the screen.

9. Slowly press the Deflection Yoke and set it where a uniform

green field is obtained.

10. Adjust roughly the Low Light controls and make sure that a

uniform white field is obtained.

11. Tighten the clamp screw.

3.6. CONVERGENCE

1. INSTRUMENT

a. Helmhortz device

2. PREPARATION

a. Set the Helmhortz device to local magnetic field.

Horizontal : 0 ± 0.03 x10-4 T

b. Receive the cross hatch pattern.

c. Picture menu : DYNAMIC Normal and adjust BRIGHT

DAC until gray portion of cross hatch.

d. Set DY to CRT not to tilt (Up and Down and Left and

Right).

3. ADJUSTMENT

a. Static Convergence Adjustment

a. Make sure that magnets are positioned shown in

Fig. 1.

b. Adjust 4-pole magnets (Fig. 1) to align center dots of

R and B and adjust 6-pole magnets to align center

dots to G.

c. After adjustment, secure magnets with magnet lock

of white lacquer.

*Beams move with rotating when static magnets are

turned.

Rotational reduce of beams differs by angle of two

magnets.

Therefore, repeat magnet adjustments several times

so that all are aligned completely.

b. YHC, YV, XV, Adjustment (Fig. 2)

a. Adjust so that Static and Dynamic Convergence is

best with YHC, VR, YV and XV coil.

In case of Static Convergence is tilted, repeat (1)

Static Convergence Adjustment.

c. Dynamic Convergence Adjustment

a. When dynamic convergence is bad, fixing permalloy

between neck and DY so that dynamic convergence

is best.

4. Confirm that left upper side line is straight.

When left upper side line isn’t straight, put magnet on DY

and adjust the left upper side line to straight.

TX-34P180RB- / MIDDLE EAST

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