Panasonic TX-29PS72X Bedienungsanleitung

Order No. MTV0207200C3

Colour Television

TX-29PS72X

MX-12 Chassis

SPECIFICATIONS

Specification

Power Source AC Auto110-240 V, 50/60 Hz

Power Consumption 148 W

Standbycondition : 2W

Aerial Terminal Impedance : 75 , Coaxial type

Tuning System FrequencySynthesizer

AutoSearchTuning

Pos: 100 Positions

Receiving System 17 Systems

Receiving Channels Regular TV

VHFBAND 2-12 (PAL/SECAM B, K1)

0-12 (PALB AUST.)

1-9(PALB N.Z.)

1-12 (PAL/SECAM D)

1-12 (NTSC M Japan)

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

UHFBAND 21-69 (PALG, H, I/SECAM G, K,

K1)

28-69 (PALB AUST.)

13-57 (PALD, K)

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)

IntermediateFrequency 38.0MHz

Video 31.5MHz (D, K)/ 32.5MHz (B, G)

32.0MHz (I)/ 32.5MHz (M)

Sound 33.57 MHz (PAL)/

Colour 33.6MHz (SECAM)

34.42 MHz (NTSC)/

33.75 MHz (SECAM)

Receiving StereoSound

System QUADRASTEREO/ TEXT

Video/Audio/Terminals IN S-VideoY:1.0Vp-p75

AV 1, 2, 3, 4 DVD IN S-VideoC:0.3Vp-p75

Y/ PB/ PR(PhoneType) Y:1.0Vp-p75 PB,

PR:0.7Vp-p75 Video1.0Vp-p

75 AudioApprox. 400mV 47K

Video1.0Vp-p75

MonitorOut AudioApprox. 400mV 47K

High Voltage 31.0(+0.7, -1.5kV) at zero

beam current

Picture Tube M68LQK186XH Type29 (68 cm)

Measureddiagonally,

104° deflection

AudioOutput 20 Wspeaker

Dimensions(WxD xH) 820 mm x495.9mm x563.7mm

Weight (Mass) 48 kg(Net)

Note:

Specificationsare subject tochangewithout notice.Mass and

dimensionsshownare approximate.

Unauthorized copying and distribution isaviolation of law.

1. Safety Precautions

1.1. General Guide

1. Itisadvisableto insert an isolation transformer inthe AC supply

before servicing ahot chassis. Fig. 1.

Fig. 1

2. When servicing, observe the original lead dress, especiallythe

lead dress inthe high voltage circuits. Ifashort circuitisfound,

replace all parts which have been overheated or damaged bythe

short circuit.

3. After servicing, observe that all the protective devices such as

insulation barriers, insulation papers, shields, and isolation R-C

combinations, are properlyinstalled.

4. When the receiver isnot to be used for along period of time,

unplug the power cord from the AC outlet.

5. Potential, as high as 31.7kV ispresent when thisreceiver isin

operation. Operation of the receiver without the receiver power

supply. Servicing shouldnot be attempted byanyone who isnot

thoroughlyfamiliar with the precautionsnecessarywhen working

on high voltage equipment. Alwaysdischarge the anode of the

picture tube to the receiver chassisbefore handling the tube.

After servicing make the following leakage current checks to

prevent the customer from being exposed to shock hazards.

1.2. Leakage Current ColdCheck

1. Unplug the AC cord and connect ajumper between the two

prongs on the plug. Fig. 2. Fig. 2

2. Turn on the receiver’spower switch.

3. Measure the resistance value, with an ohmmeter, between the

jumpered AC plug and each exposed metalliccabinet part on the

receiver, such as screw heads, aerials, connectors, control shafts,

etc. When the exposed metallicpart has areturn pathto the

chassis, the reading shouldbe between 4M and 20 M . When

the exposed metal does not have areturn path to the chassis, the

reading must be zero.

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

1. Plug the AC cord directlyinto the AC outlet. Donot use an

isolation transformer for thischeck.

2. Connect a2k , 10 Wresistor inseries with an exposed metallic

part on the receiver and an earth such as awater pipe.

3. Use an AC voltmeter, with high impedance type, to measure the

potential across the resistor.

4. Check each exposed metallicpart, and measure the voltage at

each point. Fig. 3. Fig. 3

5. Reverse the AC plug inthe AC outlet and repeat each of the above

measurements.

6. The potential anypoint shouldnot exceed 1.0Vrms. Inthe case

of ameasurement being outside of the limits specified, there isa

possibilityof ashock hazard, and the receiver shouldbe repaired

and re-checked before itisreturnedto the customer. Fig. 4.

Fig. 4

1.4. X-Radiation

Warning :

1. The potential sources of X-Radiation inTV sets are the EHT

section and the picture tube. /

2. When using apicture tube test rigfor service, ensure that the rig

iscapableof handling 29.5kV without causing X-Radiation. /

Note: It is important touse anaccurate periodicallycalibratedhigh voltage meter. /

1. Set the brightness to minimum.

2. Measure the High Voltage. The meter reading shouldindicate 31.0

+0.7, -1.5kV. Ifthe meter indication isout of tolerance, immediate

service and correction isrequired to prevent the possibilityof

premature component failure.

3. To prevent the possibilityof X-Radiation, itisessential to use the

specified picture tube.

1.5. MX-12 Block Diagram

2. Location of Controls and Circuit Boards

2.1. REAR VIEW

2.2. LOCATIONAND FUNCTIONNAME OFCIRCUITBOARD

3. Service Hints

3.1. HOWTO MOVE CHASSISINTO SERVICEPOSITION.

1. Remove 9screws.

2. Draw out MainChassis.

3. Stand the MainChassis.

4. Market Mode Function

Outline:

MPU controls the functions switching foreachICs through IIC bus inthis chassis. The following

setting and adjustment canbe adjustedbyremote control inMarket Mode.

1. Selection of Market Mode

Adjust the VOLUME “zero” and set OFF TIMERButton to 30 min.

Then, simultaneouslypress the RECALL Button on the remote

control and the VOLUME DOWNbutton -the TV set.

2. Selection of CHK Mode

Cursor moves each CHK Mode bypressing “1” or “2” of 10 key

button on the remote control.

1. CHK 1

OPTION 1 FF

OPTION 2 00

OPTION 3 EE

OPTION 4 00

OPTION 5 F2

OPTION 6 03

OPTION 7 01

OPTION 8 79

OPTION 9 DE

2. CHK 2

RFAGC 1E H

AGC - LVL 0A H

S CONT 67 H

S-COL 46 H

S-TINT 0B - H

SECAM B-Y 07 H

SECAM R-Y 07 H

TEXTS LVL 47 H

3. CHK 3

S-BRI 0A H

R-DRV 42 H

B-DRV 50 H

R-CUT 51 H

G-CUT 75 H

B-CUT 9A H

4. CHK 4

S-GEO 1FH

H POS 0C H

V POS 01 H

H-AMP 2FH

V-AMP 49 H

PARAB 47 H

TRAPE 21 H

V-LIN 07 H

T-COR 14 H

B-COR 14 H

V-S-COR 0D H

V-H-PAR 02 H

V-H-BOW 03 H

5. Adjustment Procedure

5.1. BVOLTAGE

Item/Preparation Adjustment Procedure

1. Operate theTVset.

2. Set controls:(MARKETMODECHK 2) / Bright

............. Minimum / Contrast ......... Minimum / Volume

............. Minimum

1. Confirm that theindicated test points for the

specified voltage:/ TPA140 :141 ± 2V/ TPA12 :12 ±

1.0V/ TPA9:9± 1V

TPA5& TPA6:5± 0.5V

TPA220 :220 ± 15V

TPA3:3.3± 0.2V

5.2. RFAGC

Item/Preparation Adjustment Procedure

1. Receiveacolour bar pattern.

2. Set theinputlevel to 69 (+1.2) db.

(75 opened)

3. Set RF AGC in CHK 2.

1. Set RF AGC Control such as to procedureasnowypicture.

2. Set RF AGC Control at thepointjust beforethevoltageat

AGC

20 beginsto drop.

3. Increase theinputlevel by3db and confirm that the

voltage

5.3. HIGHVOLTAGE

Item/Preparation Adjustment Procedure

1. Operate theTVset.

2. Receivethecrosshatch pattern.

3. Set to 0Beam / (Screen Control :min. CONTRAST:min)

1. Connect aDC voltagemeter to D850 cathodeand confirm

the

141.0± 2.0V.

2. Connect ahigh voltagemeter (ElectrostaticType) to an

anode

picturetube.

3. Confirm that thehigh voltageiswithin therangeof31.0±

0.7V.

5.4. SUB TINT

Item/Preparation Adjustment Procedure

1. Receivea3.58 MHz NTSC rainbowpattern

2. Connect oscilloscopeto A21 pin 6.

3. Set controls:/ BRT................CENTER / COLOUR........CENTER /

CONTRAST....MAX/ NTSC TINT.....CENTER / AI....................OFF

1. Adjust Sub NTSC Tintso that thepeak oflevel ofwaveform

Fig. 3

2. ReceivetheRainbowpattern (3.58 MHz NTSC)on both of

Main

pictures.

3. Adjust Sub NTSC Tint2so that thepeak oflevel of1.3±

0.5V

5.5. SUB CONTRAST

Item/Preparation Adjustment Procedure

1. Receiveacolour bar pattern.

2. Connect an oscilloscopeto TPA37 or TPL2(G OUT).

3. Connect ashortjumper to FBTpin3or TPA34 and TPA5..

4. Set controls:

Picturemenu ........ DynamicNormal

AI ............................. off

1. Adjust BrightColour:/ a= 2.4± 0.2Vp-p

2. Adjust Sub Contrast Colour:/ b = 2.7± 0.1Vp-p

5.6. PALCOLOUR OUTPUT

Item/Preparation Adjustment Procedure

1. ReceivePAL colour bar pattern.

2. Connect an oscilloscopeprobeto TPA37 or TPL2(G OUT).

3. Connect ashortjumper to FBTpin 3or TPA34 and TPA5.

4. Set control :

Picturemenu.....................DYNAMIC NORMAL / AI......................................off

1. Adjust BrightControl.

a= 2.3± 0.5Vp-p

2. Adjust Sub Colour control.

3. Connect theoscilloscopeprobeto TPA40.

4. Connect thewaveform.

b = 3.1± 0.5Vp-p

5.7. NTSCCOLOUR OUTPUT

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