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.
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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.
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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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