Panasonic TX-29PS72X User manual

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)
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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.
2002 Matsushita ElectricIndustrial Co., Ltd. All rights reserved.
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.
2

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,
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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
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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
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3. Service Hints
3.1. HOWTO MOVE CHASSISINTO SERVICEPOSITION.
1. Remove 9screws.
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2. Draw out MainChassis.
7

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
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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
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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
is
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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Item/Preparation Adjustment Procedure
1. Apply3.58MHz NTSC Rainbowpattern.
2. Connect an oscilloscopeto TPA36 or TPL1(R OUT).
3. Connect ashortjumper to FBTpin 3or TPA34 and TPA5.
4. Set control :
Picturemenu.......................DYNAMIC CONTROL
Channel Colour Set...........STD
1. Adjust BrightControl.
a= 2.3± 0.2Vp-p
2. Connect thewaveform.
b = 1.3± 0.5Vp-p
Before ColourPurity, Convergence and White Balance adjustments are attempted, V. Center, V.
Height,
Width, H. Centerand Focus adjustments must be completed.
5.8. COLOUR PURITY
1. Set Bright and Contrast controlsto theirmaximum positions.
2. Operate the TV set over 60 minutes.
3. Full degauss the picture tube byusing an external degaussing
coil. Byrotating R-Bstaticconvergence magnet.
4. Applyacrosshatch pattern signal and adjust roughlythe static
convergence magnets.
5. Applyagreen pattern signal.
6. Loosen aclamp screw for the Deflection Yoke and move the
Deflection Yoke as close to the puritymagnet as possible.
7. Adjust the puritymagnet so that avertical green fieldisobtained
at the center of the screen.
8. Slowlypress the Deflection Yoke and set itwhere auniform green
fieldisobtained.
9. Adjust roughlythe Low Light controlsand make sure that a
uniform white fieldisobtained.
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10. Tighten the clamp screw.
5.9. CONVERGENCE
1. Applyacrosshatch pattern signal and set Contrast control to the
maximum position.
2. Adjust Bright control to obtainaclear pattern.
3. Adjust Red and Blue line at center of the screen.
4. Adjust Red and Blue with Green line at center of the screen by
rotating (RB)-G staticconvergence magnet.
5. Lock convergence magnets with silicone sealer.
6. Remove the DYwedges and slightlytiltthe Deflection Yoke
vertically.
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7. Fixthe Deflection Yoke byre-inserting the DYwedges.
8. Ifpurityerror isfound, repeat “Colour Purity”adjustment.
5.10. WHITE BALANCE(MARKET MODECHK 3)
Preparation
1. Receive acolour bar signal with colour “OFF”, and operate the TV
set for more than 30 minutes.
2. Set the picture menu to “DYNAMICNORMAL” and the AI to off.
3. Connect an oscilloscope to TPL7 with DC mode.
4. Set the TV set to Market Mode :white balance adjustment (CHK 3).
5. Screen VR:Min.
6. Set the data level of RGBCUTOFF / DRIVE and SUB BRIGHT.
Display Data Level
R-CUTOFF 63
G-CUTOFF 128
B-CUTOFF 63
R-DRIVE 128
B-DRIVE 128
SUB BRIGHT 63
Adjustment
1. Select G-CUTOFF adjustment mode and collapse vertical scan.
2. Adjust G-CUTOFF control to become the DC=0Vto video level at
180 Vas showninFig. 1. Fig. 1
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3. Slowlyturn the screen control clockwise until agreen colour
horizontal line appears on the picture tube. Thisisthe setting
point for the screen control. / Note:
Donot adjust the G-CUTOFF setting inthe following procedure.
4. Adjust the remaining Rand B-CUTOFF controlsso as to get a
white horizontal line on the screen.
5. Return to full fieldSCAN bypushing the position 5keyon the
remote control.
6. Adjust the R-Drive and B-Drive controlsas to obtainauniform
white on the white bar of the greyscalepattern.
7. Confirm correct B/Wrendition and greyscaletracking or repeat
CUTOFF and drive control setup. / /
Note: / Write downthe original value for each address adjustment
before adjusting anything.
8. Wedge AshowninFig. 2shouldbe fixed withinarange of 45° to
the left of the vertical line as shown.
9. After inserting wedge A, insert wedges B, Cand D. / The wedges
shouldbe set 90° apart from each other.
10. Becertainthat the four wedges are firmlyfixed and the
Deflection Yoke istightlyclamped inplace otherwise the
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Deflection Yoke mayshift its position and cause aloss of
convergence and purity.
6. Conductor Views
6.1. A-Board
7. Schematic Diagrams
7.1. SCHEMATICDIAGRAMFORMODEL TX-29PS72X / (MX-12
CHASSIS)
15

7.2. ABoard
7.2.1. A Board(1/4)
7.2.2. A Board(2/4)
7.2.3. A Board(3/4)
7.2.4. A Board(4/4)
7.3. GMBoard
7.3.1. GM Board(1/2)
7.3.2. GM Board(2/2)
7.4. HBoard
7.4.1. H Board(1/2)
7.4.2. H Board(2/2)
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7.5. YCBoard
7.5.1. YC Board(1/2)
7.5.2. YC Board(2/2)
7.6. LBoard
7.6.1. LBoard(1/2)
7.6.2. LBoard(2/2)
7.7. KBoard
7.7.1. K Board(1/2)
7.7.2. K Board(2/2)
7.8. XBoard
7.8.1. X Board(1/2)
7.8.2. X Board(2/2)
7.9. TBoard
7.9.1. TBoard(1/2)
7.9.2. TBoard(2/2)
8. Parts Locations
17

9. Replacement Parts List
9.1. Replacement Parts List Notes
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9.2. Replacement Parts List
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Ref. No. PartNo. PartName& Description Remarks
1EASG12D563A2 SPEAKER
EUR646932 REMOTECONTROL
2KDY4UHF35F DEFLECTION YOKE
3M68LUQ086XL PICTURETUBE
TBL4G3403 SETLEG
TBL4G3404 SETLEG
4TBM4G0884 MODEL NAMEPLATE
5TBM4G3011 PANASONIC BADGE
6TBX4G88201 POWER BUTTON
7TEK6935 DOOR SWITCH
TES4G406 COIL SPRING
THT4G1011R CRTSCREW
THT4G1013R SCREW
TJB1726400 75OHMADAPTOR
8TKP4G12714 DOOR
9TKP4G12720 REAR AVBRACKET
10 TKU4GA0200-2 BACK COVER
11 TLK4G9022T-1 ROTATION COIL
12 TLK4G9064X DEGAUSSING COIL
TMM4G503 RUBBER WEDGE
NLA TNP4G118AW GMBOARD
NLA TNP4G219AA A BOARD
NLA TNP4G220AA H BOARD
NLA TNP4G221AA YC BOARD
NLA TNP4G228AA L BOARD
NLA TNP4G229AA K BOARD
NLA TNP4G240AA XBOARD
NLA TNP4G252AB TBOARD
TPC4G48101 CARTON
TPD4G2088 CUSHION (BOTTOM)
TPE4G14023 SETCOVER
TPE4G14034 TOPCOVER
TQB4G3227 FAN BAG
TSM10032-3 MAGNET
TSN63115-4 PURITYMAGNET
TSX4G166H AC POWER CORD
13 TXFKY0129PS CABINETASSY
TXFPD01YG2S CUSHION (TOP)
RESISTORS
R101 ERG3FJ822H M8.2KOHM,J, 3W
R106 ERJ6GEYJ823 M 82KOHM,J,1/10W
R108 ERJ6GEYJ153 M 15KOHM,J,1/10W
R110 ERJ6GEYJ100 M 10OHM,J,1/10W
R115 ERJ6GEYJ472 M 4.7KOHM,J,1/10W
R116 ERJ6GEYJ470 M 47OHM,J,1/10W
R117 ERJ6GEYJ122 M 1.2KOHM,J,1/10W
R118 ERJ6GEYJ122 M 1.2KOHM,J,1/10W
R119 ERJ6GEYJ121 M 120OHM,J,1/10W
R120 ERJ6GEYJ682 M 6.8KOHM,J,1/10W
R121 ERJ6GEYJ222 M 2.2KOHM,J,1/10W
R125 ERJ6GEYJ222 M 2.2KOHM,J,1/10W
R126 ERJ6GEYJ122 M 1.2KOHM,J,1/10W
20