Panasonic TX-34P150X User manual

OrderNo. MTV0206175C3
Colour Television
TX-34P150X
MD3AChassis
SPECIFICATIONS
Specifications

Power Source ACSINGLE220 V, 50 Hz
Power Consumption 209 W
Standbycondition :3.0W
Receiving System 21 Systems
Function
Reception ofbroadcast
transmissionsand
Playback fromVideo
CassetteTapeRecorders
1PAL B, G, H
2PAL I
3PAL D, K
4SECAMB, G
5SECAMD, K
6SECAMK1
7NTSCM(NTSC3.58/4.5MHz)
8NTSC4.43/5.5MHz
Playback fromspecial
VCRs 9NTSC4.43/6.0MHz
10 NTSC4.43/6.5MHz
11 NTSC3.58/5.5MHz
12 NTSC3.58/6.0MHz
13 NTSC3.58/6.5MHz
14 SECAMI
Playback fromSpecial
Disc 15 PAL 60 Hz/5.5MHz
Players and Special VCRs 16 PAL 60 Hz/6.0MHz
17 PAL 60 Hz/6.5MHz
18 SECAM60 Hz/5.5MHz
19 SECAM60 Hz/6.0MHz
20 SECAM60 Hz/6.5MHz
21 NTSC50 Hz/4.5MHz
Receiving Channels Regular TV
VHF BAND 2-12 (PAL/SECAMB, K1)
0-12 (PAL BAUST.)
1-9(PAL BN.Z.)
1-12 (PAL/SECAMD)
1-12 (NTSCMJapan)
2-13 (NTSCMU.S.A.)
UHF BAND 21-69 (PAL G,H,I/SECAMG,K,K1)
28-69 (PAL BAUST.)
13-57 (PAL D,K)
13-62 (NTSCMJapan)
14-69 (NTSCMU.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 NICAMI, NICAMB/G, NICAMD, A2

(German)
Tuning System Frequencysynthesizer
Auto Search Tuning
POSITION:100 Position
DIRECT :125 Position
High Voltage 31.0± 1.0kVatzero beam current
Picture Tube Overall Picture tubemeasured
diagonally:72 cm
ViewablePicture tubemeasured
diagonally:68 cm
CRT Deflection :104°
Audio Output 36 W[2-way, 4-speaker;12 W+12
W, AFBwoofer;12 W](10%THD)
Headphones 3.5mm Plug
Aerial Impedance 75 Unbalanced Coaxial
VIdeo/Audio/Component
Terminals
S-Video In Y:1Vp-p, 75
AV1, 2, 3,4
C:0:3Vp-p 75
DVD(Y/PB/PR)
Video In 1Vp-p, 75
Audio In Approx0.4V47 k
Video Out1Vp-p, 75
MonitorOut Audio OutApprox. 0.4V1k
AV1IN(Rear):S-Video,
Video, Audio L/R
terminals/ AV2IN(Rear):
Video orY/PB/PRAudio L/
Rterminals/ AV3IN
(Front) :S-Video, Video,
Audio L/RRGBterminals
/ AV4IN(Rear):Video or
Y/PB/PR, Audio L/R
terminals
/ / / /
RGBInput High-DENSITYD-sub 15 pin
RemoteControl
Transmitter R6 (AA)Batteryx2
Dimensions(W×D×H) 75 coaxial aerial plug
652 mm x517 mm x612 mm
Weight(Mass) 53 kg (Net)
Note:/ Design and Specificationsare subjectto change
withoutnotice. Weightand Dimensionsshown are approximate.
2001 Matsushita ElectricIndustrial Co., Ltd. All rights reserved.
Unauthorizedcopying and distribution isaviolation oflaw.

1. SAFETY PRECAUTIONS
1.1. General Guide
1. Itisadvisabletoinsertanisolation transformerintheACsupply
beforeservicing ahotchassis.
2. Whenservicing, observetheoriginal leaddress, especiallythe
leaddress inthehigh voltagecircuits. Ifashortcircuitisfound,
replace all parts whichhavebeenoverheatedor damagedbythe
shortcircuit.
3. Afterservicing, see toitthat all theprotectivedevices suchas
insulation barriers, insulation papers, shields, and isolation R-C
combinations, areproperlyinstalled.
4. Whenthereceiverisnottobeusedfor along period oftime,
unplug thepowercord from theACoutlet.
5. Potential, as high as 32.0kV ispresentwhenthisreceiverisin
operation. Operation ofthereceiverwithouttherearcover
involves thedangerofashock hazard from thereceiverpower
supply. Servicing shouldnotbeattemptedbyanyonewho isnot
thoroughlyfamiliarwiththeprecautionsnecessarywhenworking
on high voltageequipment. Alwaysdischargetheanodeofthe
picturetubetothereceiverchassisbeforehandling thetube.

6. Afterservicing make thefollowing leakagecurrentchecks to
preventthecustomerfrom being exposedtoshock hazards.
1.2. LeakageCurrentColdCheck
1. Unplug theACcord and connect ajumperbetweenthetwo
prongson theplug.
2. Turn on thereceiver’spowerswitch.
3. Measuretheresistance value, withanohmmeter, betweenthe
jumperACplug and eachexposedmetalliccabinet parton the
receiver, suchas screwheads, aerials, connectors, control
shafts, etc. Whentheexposedmetallicparthas areturn pathto
thechassis, thereading shouldbebetween4M and 20 M .
Whentheexposedmetal does nothaveareturn pathtothe
chassis, thereading must beinfinite.
1.3. LeakageCurrentHotCheck (See Fig. 1)
1. Plug theACcord directlyintotheACoutlet. Donotuse an
isolation transformerfor thischeck.
2. Connect a2k , 10 Wresistor inseries withanexposedmetallic
parton thereceiverand anearthsuchas awaterpipe.
3. Use anACvoltmeter, withhigh impedance type, tomeasurethe
potential across theresistor.
4. Check eachexposedmetallicpart, and measurethevoltageat
eachpoint.

5. Reverse theACplug intheACoutlet and repeat eachoftheabove
measurements.
6. Thepotential anypointshouldnotexceed1.0V rms. Inthecase
ofameasurementbeing outsideofthelimits specified, thereisa
possibilityofashock hazard, and thereceivershouldberepaired
and recheckedbeforeitisreturnedtothecustomer.
1.4. X-Radiation
Warning :
1. Thepotential sources ofX-Radiation inTV sets aretheEHT
section and thepicturetube. /
2. Whenusing apicturetubetest rigfor service, ensurethat therig
iscapableofhandling 32.0kV withoutcausing X-Radiation. /
Note:Itis important to use anaccurate periodicallycalibratedhigh voltage meter. /
1. Set thebrightness tominimum.
2. MeasuretheHigh Voltage. Themeterreading shouldindicate 31.0
±1kV. Ifthemeterindication isoutoftolerance, immediate
service and correction isrequiredtopreventthepossibilityof
prematurecomponentfailure.
3. TopreventthepossibilityofX-Radiation, itisessential touse the
specifiedpicturetube.
2. SERVICE HINTS
2.1. HOWTO REMOVE THE REARCOVER
1. Removethe9screwsas showninFig. 1.

Fig. 1
2.2. LOCATIONOFCONTROLS Fig. 2
2.3. HOWTO MOVE THE CHASSIS INTO SERVICE POSITION
1. Holdand lift therearofthechassisand gentlypull thechassis
towardsyou as showninFig. 3.
2. Release therespectivewiring clipsand rotate thechassis
verticallythrough 90° anticlockwise.
3. Afterservicing replace thebeadclamperand ensureall wiring is
returnedtoits original position beforereturning thereceiverto
thecustomer.

2.4. HOTELMODE
Purpose
1. AtHotels, thisModeprevents thecustomerfrom changing theTV
preset data suchas Channel preset data. / / Note:ThisModeis
useful for Hotels. You shouldnotget into“Hotel mode”with
Normal use.
Operation
1. Toget into“Hotel Mode”, press theremote control “Recall”

button and Channel Up“[+/ ]”keyon theTV set
simultaneously, aftersetting the“Off-Timer” mode.
2. Inthismode, theChannel Upand DownFunction will beenabled
as normal and themaximum volumelevel for thismodeisset at
thecurrentvolumelevel, iethesetting at thelevel beforeentering
themode. However, otherfunctionswill bedisabled.
3. Toexitthismode, exit“Off-Timer” modeand the“VolumeDown[-/
]”keysimultaneously. / *Thisinformation isinformedby
Service Manual only.
2.5. Service Position for DG-Board
Note:/ Extension cable kitforDGBoardis suppliedas service fixtures and tools. (PartNo.
TZSC07024)
3. SELF CHECK

1. SelfCheck isusedtoautomaticallycheck thebuslines and
hexadecimal codeoftheTV set.
2. Toget intotheSelfCheck mode, press thedownn[-/ ] button
on thecustomercontrolsat thefrontoftheset, at thesametime
pressing theHELP button on theremote control and thescreen
will show:
4. SERVICE MODE FUNCTION
MPU controls the functions switching foreachIIC through IIC bus inthis chassis. The following
setting and adjustment canbe adjustedbyremote control inService Mode.
4.1. HOWTO ENTERSERVICE 1
1. Insound menu, set BASS toMAX and set TREBLE toMINIMUM.
2. Simultaneouslypress INDEX button on remote control and
VOLUME DOWNbutton [-]on theTV set.
4.2. HOWTO ENTERSERVICE 2
1. Set thechannel toCH99.
2. Press HOLDbutton on remote control. / Note:/ ToexitService
mode, press Nor Powerbutton on remote control.

5. ADJUSTMENTPROCEDURE
5.1. VOLTAGE CONFIRMATION
Item/Preparation Adjustment Procedure
1. Operate the TVset.
2. Set controls:/ Bright Minimum/ Contrast Minimum/
VolumeMinimum
1. TPA55 :144.8± 1.0V(D-Board)
2. TPA56 :12.0± 1.0V(D-Board)
3. TPA57 :9.0± 1.0V(D-Board)
4. TPA17 :2.5± 0.25V(D-Board)
5.2. E.H.TCHECK

Item/Preparation Adjustment Procedure
1. ReceiveanRFsignal, window orcrosshatchpattern.
2. Set the Brightness and Contrast to minimum(0 Beam)
3. Connect the High Voltage Voltmeterto the CRTANODECAP.
4. Theset shouldbeswitched to AV(no input) contrast and brightness
minimum.
1. Check the EHTvoltage is(32.0±1.0) kV.
2. Switch fromAVmodeto TV.
3. With the Brightness and the contrast controlsMAX, check
that
voltage does not drop morethan 3.0kVfromthe above
measurement
R.F. signal.
5.3. SUB CONTRAST
Item/Preparation Adjustment Procedure
1. ReceivePALcolourbarpattern.
2. Connect oscilloscopeto A21 pin3.
3. Set controls:/ BRT................CENTER / COLOUR........CENTER /
CONTRAST....MAX/ AI....................OFF
1. Adjust Sub Contrast (Service 1) :/ A=3.85± 0.1V
Fig. 1
2. Adjust Videogain2(Service 1) sothat Sub picturelevel B
becomes
sameas Mainpicturelevel A.
Fig. 2
5.4. SUB TINT
Item/Preparation Adjustment Procedure
1. Receivea3.58 MHz NTSC rainbow pattern.
2. Connect oscilloscopeto A21 pin6.
3. Set controls:/ BRT................CENTER / COLOUR........CENTER /
CONTRAST....MAX/ NTSC TINT.....CENTER / AI....................OFF
1. Adjust Sub NTSC Tint sothat the peak of level of waveform
is
Fig. 3.
Fig. 3
2. Receivethe Rainbow pattern(3.58 MHz NTSC)on both of
Main
pictures.
3. Adjust Sub NTSC TInt 2sothat the peak of level of
waveform
to Fig. 4.
Fig. 4
5.5. SUB COLOUR
Item/Preparation Adjustment Procedure
1. Receivea3.58 MHz NTSC rainbow pattern.
2. Connect oscilloscopeto A21 pin3.
3. Set controls:/ BRT................CENTER / COLOUR........CENTER /
CONTRAST....MAX/ AI....................OFF
1. Adjust Sub Colour:/ A=3.3±0.5V
Fig. 5
5.6. SECAMBLACK LEVEL

Item/Preparation Adjustment Procedure
1. ReceiveSECAMwhite pattern.
2. Connect oscilloscopeto A44 pin39.
3. Set controls:/ BRT................CENTER / COLOUR........CENTER /
CONTRAST....MAX/ AI....................OFF
1. Adjust SECAMB-Ysothat H-blanking timeand colour
center
level.
Fig. 6
2. Connect oscilloscopeto A44 pin41.
3. Adjust SECAMR-YOUTsothat H-blanking timeand colour
centre
equal level.
Fig. 7
4. Connect oscilloscopeto A44 pin39.
5. ReceiveSECAMwhite patternon both Mainand Sub
picture.
6. Adjust Sub SECAMB-Ysothat H-blanking timeand colour
center
equal level.
Fig. 8
7. Connect oscilloscopeto A44 pin41.
8. Adjust Sub SECAMR-Ysothat H-blanking timeand colour
center
equal level.
Fig. 9
5.7. VRS ADJUSTMENT
1. PREPARATION
A. Set DY toCRTnottotiltUpand Downand Left and Right
deflection. (Fig. 1)
B. Set CY toCRTand set CY magnet primarily. / Pur Mg:Set Pur
Mgthat 2magnets arevertical position. / VRS Mg:Set VRS Mg
that 2magnets aresideposition.
C. Set geomagneticcorrection DAC[0].
2. ADJUSTMENT
A. Receivethewhite balance pattern.
B. Adjust V-CENTER.
C. Set R,BCUTOFF tominimum (0), and set G CUTOFF tocenter
(511).
D. Receivetheaging pattern.
E. Set 2magnets ofvertical position toUpand Downequallyso
that itwill beat centerpartofCRT. (Fig. 3)
Fig. 1

Fig. 2
Fig. 3
5.8. COLOUR PURITY
1. Operate theTV set for over60 minutes.
2. Receiveapuritypattern signal. (white pattern)
3. Set Brightand Contrast controlstotheirmaximum positions.

4. Set V-POS to128.
5. Adjust roughlythestaticconvergence magnets.
6. Fullydegauss thepicturetubeusing anexternal degaussing coil.
7. Loosenaclamp screwfor theDeflection Yoke and movethe
Deflection Yoke as close tothepuritymagnet as possible.
8. Adjust thepuritymagnet sothat avertical greenfieldisobtained
at thecenterofthescreen.
9. Slowlypress theDeflection Yoke and set itwhereauniform green
fieldisobtained.
10. Adjust roughlytheLowLightcontrolsand make surethat a
uniform white fieldisobtained.
11. Tightentheclamp screw.
5.9. CONVERGENCE
1. INSTRUMENT
A. Helmhortzdevice
2. PREPARATION
A. Set theHelmhortzdevice tolocal magneticfield. / Horizontal :0
±0.03 x10-4 T

B. Receivethecross hatchpattern.
C. Picturemenu :DYNAMICNormal and adjust BRIGHTDACuntil
grayportion ofcross hatch.
D. Set DY toCRTnottotilt(Upand Downand Left and Right).
3. ADJUSTMENT
A. StaticConvergence Adjustment
a. Make surethat magnets arepositionedshowninFig. 1.
b. Adjust 4-polemagnets (Fig. 1) toalign centerdots ofRand B
and adjust 6-polemagnets toalign centerdots toG.
c. Afteradjustment, securemagnets withmagnet lock ofwhite
lacquer. / *Beamsmovewithrotating whenstaticmagnets
areturned. / Rotational reduce ofbeamsdiffersbyangleof
twomagnets. / Therefore, repeat magnet adjustments several
times sothat all arealignedcompletely.
Fig. 1
B. YHC, YV, XV, Adjustment(Fig. 2)
a. Adjust sothat Staticand DynamicConvergence isbest with
YHC, VR, YV and XV coil. / Incase ofStaticConvergence is
tilted, repeat (1) StaticConvergence Adjustment.
Fig. 2
C. DynamicConvergence Adjustment
a. Whendynamicconvergence isbad, fixing permalloybetween

neck and DY sothat dynamicconvergence isbest.
4. Confirm that left uppersidelineisstraight. / Whenleft upperside
lineisn’tstraight, putmagnet on DY and adjust theleft upperside
linetostraight.
5.10. CUTOFF
Preparation
1. Receiveacolour barsignal withcolour “OFF”, and operate theTV
set morethan15 minutes.
2. Set thepicturemenu to“DYNAMICNORMAL” and theAI tooff.
3. Connect anoscilloscopetoTPL7withDC mode.
4. Set theTV set toService Mode1.
5. ScreenVR:Min.
6. Set thedata level ofSUB BRIGHT, R, G, B-CUTOFF and R, G, B-
DRIVE tothetablevalues.
Display Data Level
R High (R-CUTOFF) 128
GHigh (G-CUTOFF) 128
B High (B-CUTOFF) 128
R Low(R-DRIVE) 175
GLow(G-DRIVE) 175
B Low(B-DRIVE) 175
SUB BRIGHT 128
Adjustment
1. Select G-CUTOFF adjustmentmodeand collapse vertical scan.
2. Adjust G-CUTOFF control tobecometheDC=0V tovideolevel at
180V as shownbelow:
3. Slowlyturn thescreencontrol clockwise until agreencolour
horizontal lineappearson thepicturetube. Thisisthesetting
pointfor thescreencontrol. / Note that do notadjust theG-
CUTOFF setting inthefollowing procedure.

4. Adjust theremainedRand B-CUTOFF controlssoas toget a
white horizontal lineon thescreen.
5. Return tofull fieldSCANbypushing theposition 5keyon the
remote control.
6. Adjust theR-Driveand B-Drivecontrolsas toobtainuniform
white on thewhite barofthegreyscalepattern.
7. Confirm correct B/Wrendition and greyscaletracking or repeat
CUTOFF and drivecontrol setup. / Note:/ Write downtheoriginal
valuefor eachaddress adjustmentbeforeadjusting anything.
8. WedgeAshowninFig. 1shouldbefixedwithinarangeof45° to
theleft ofthevertical lineas shown.
9. Afterinserting wedgeA, insertwedges B, Cand D. / Thewedges
shouldbeset 90° apartfrom eachother.