SERVICE MANUAL ,— , .- Colour Television . Model No. CZP2141TX (New Zealand) Service Ref. No. CZP2141TX-00 .+%pecifications k >ower Source... ..................AC230V. 50Hz Power Consumption,.,.,.,.,,.76W Television System .............. B/G Colour System .................... PAL Channel Coverage. ...........VHF. 1 – 11 UH F: 21 – 69 Video IF .............................38.9 MHz Sound IF ............................33.4 MHz Aerial Input impedance.....75 Q Picture Tube ......................55cm diagonal, 90degree deflection ~ Sound Output ....................3.OW !’ Ext. Terminals ...................video Input x 1, Audio Input xl I Dimensions., ............. .......5 O6(W) x 469(H) x 483(D)mm Weight ..............................approx. 21Kg s Specifications subject to change without notice. , PRODUCTCODE: 111305608 OriginalVersion ChassisSeriesA3 – B21 Give complete” Service Ref. No. “ for parts order or servicing, it is shown on the rating plate at the cabinet back of the unit. This TV receiver will not work properly in a foreign countries where the television trans- mission system and power source differ from the design specifications. Refer to the specifications for the design specifications. ,_ REFERENCE No.WM – 520165
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SERVICE MANUAL Colour Television Model No. CZP2141TXcncms.com.au/SANYO-SMs/Consumer-Electronics/CRT-Television/cz… · 1. Tune the receiver to the monochrome circular pattern. 2.
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Give complete” Service Ref. No. “ for parts orderor servicing, it is shown on the rating plate at thecabinet back of the unit.
This TV receiver will not work properly in aforeign countries where the television trans-mission system and power source differfrom the design specifications.Refer to the specifications for the designspecifications.
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REFERENCE No.WM – 520165
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INSTALLATION AND SERVICE ADJUSTMENT
B1 POWER SUPPLY Am. TUNING DISPLAY WIDTH Am.
~~ SUB BRIGHTNESS AIM
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.0241VIDEO OUT
4
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SW251 SERVICE
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016194
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AGC ADJ.
I I SUB BRIGHTNESS AM
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GREY SCALE ANDHORIZONTAL WIDTH ADJ.
TRACKINGAW. L
-. 1.
2.
Tune receiver to colour bar pattern.
(see Fig. 1)
Cennect the oscillator to TP-F.
Adjusf VR121 tir l.OVp-p as shown in
Fig. 2.
1. Tune the receiver to the monochromecircure pattern.
2. Set the brightness and the contrastto maximum.
3. If the picture is too wide or narrow,cut or short the lead (AJ1) on themain unit.
If “AJ1” is shorted, horiz. width
increase.If “AJ1” is cut, horiz. width decrease.
Note: Horiz. width adjustment affectsthe high voltage and the subbrightness.Therefore, recheck the subbrightness and the high voltage.
CRT UNIT
AVideo det.waveform T
1.Ovpp
Fig. 2 1
w
I GreyI
–2– Fig.1 (PAL colour bar pattern)
SAFETY PRECAUTIONS : An isolation transformer should be connected in the power line between the receiver and the ACline before any service is performed on the receiver. d
X- RADIATION PRECAUTION The primary source of X- RADIATION in television receiver is the picture tube. Thepicture tube is specially constructed to limit X- RADIATION emission. For continued X- RADIATION protection, the replacementtube must be the same type as the original including suffix letter, Excessive high voltage may produce potentially hazardous X-RADIATION. To avoid such hazards, the high voltage must be maintain within specified limit. Refere to this service manual forspecific high voltage limits. If high voltage exceeds specified limits, take necessary corrective action. Carefully follow the instructionsfor + B1 volt power supply adjustment, and high voltage check to maintain the high voltage within the specified limits.
AGC ADJUSTMENTNOTE; Do not attempt this adjustment with weak signal.
1, Tune the receiver to the most clearest (or strongest) VHFstation in your area. Set the brightness and the contrastcontrols to maximum. Set the colour control to minimum.
2. Set the AGC (VR1 01) control to mid-range.3. Turn AGC control in direction which causes the snow to
appear, then in the opposite direction until the snow just
disappears.
SUB BRIGHTNESS ADJUSTMENT1, Connect a DC meter between “TP - H“ (positive lead) and
“TP - G“ (negative lead) on the main unit.
2. Receive the circular pattern.3. Set the brightness to maximum and the contrast to
minimum.
4. Adjust the sub brightness control (VR211 ) for 0.45V.
NOTE: If the picture tube replaced, check the sub-brightness adjustment.
VERTICAL SIZE ADJUSTMENT
1. Tune the receiver to the monochrome circular pattern.2. Adjust the vertical size (VR451 ) control for full scan.
HORIZONTAL CENTER ADJUSTMENT
1. Tune the receiver to the monochrome circular pattern.
2, Set the brightness and the contrast to maximum.
3. Adjust the video phase (VR411 ) for optimum horizontalcenter position.
B1 POWER SUPPLY ADJUSTMENT1. Connect DC meter to “TP- B“ and the ground.
Set the + B1 adjustment control (VR351 ) to mid-range.2. Set the brightness and the contrast to minimum.
Tune the receiver to an active channel and the synchronizepicture.
3. Adjust+ B1 adjustment control for 130* 1.0 volt DC.TUNING DISPIAY WIDTH ADJUSTMENT
1. Tune the receiver to the monochrome circular pattern.
2. Press and hold the recall button of the remote control unit
for more than 2 second.
3. Press”1” button of the channel selector of the remotecontrol unit, and the tuning bar is displayed on the screen.
4. Adjust VR71 O for optimum tunning bar width.
5. Press recall button, and the tuning bar is disappears.
GREY SCALE AND TRACKING ADJUSTMENT1. Tune the receiver to the monochrome circular pattern.
2. Set the brightness and the contrast to maximum,the colour to minimum.
3. Set the service switch (SW251 ) at the service side.4. Set the drive volume (VR602 and VR612) at their
mechanical center.
5. Set the bias volume (VR601, VR621 andVR611 ) to
minimum. (fully counter clockwise).6. Turn the screen volume to obtain just visible one
coloured line.7. Adjust each bias volume (VR601 - blue, VR621 - green
and VR611 - red) alternately until a dim white lineproduced.
8. Set the service switch (SW251 ) at the normal side.
9. Adjust the drive volume (VR602- blue andVR612- red)
alternately to produce normal black and white picture,10.Check for proper grey scale tracking at all brightness
levels. ‘~
NOTE: If grey scale adjustment is made after picture tubereplacement, check high voltage and sub - brightness
30LOUR ADJUSTMENT (PAL~
<eceive the colour bar pattern.
Set the brightness, contrast and the colour to maximum,
1 ADJUST I REMARKSoscilloscope to TP – 8A= IC851 PIN 17
1
—I
Connect th
VR281 ,T28’
v2-
Adjust VR281 ,T281 to obtain each 1Hwaveform(amplitude) for same as shownbelow.
Adjust L211 to obtain proper waveform asshown above.
-“
adjustment.
FOCUS ADJUSTMENT
Adjust the focus control on the left side of the chassis for wellscanning lines.
HIGH VOLTAGE CHECK
1. Tune the receiver to the circular pattern.
2. Set the brightness and the contrast to maximum.
3. Connect a high voltage probe to anode lead, of the picture ‘tube.
4. The high voltage must be between 24- 26KV.NOTE: If the picture tube replaced, check the high voltage.
—3—
PURITY AND CONVERGENCE ADJUSTMENT
CAUTION ; Convergence and purity have been factory aligned. Do not attempt to tamper with these alignments. However, theeffects of adjacent receiver components, or replacement of picture tube or deflection yoke may require the need to readjustpurity and convergence. If adjustment is required, the adjustments should be made in the following sequence.
PURITY ADJUSTMENTS1. Use a colour (Red, Green and Blue) pattern signal. Receiver
2.
3.*
4.
5
should be operated for at least ten minutes.Place the picture tube face east or west and demagnetizethe picture tube and receiver using an external degaussingcoil,Turn off red and blue rasters and provide only green rasteron CRT screen.Loosen the screw holding the deflection yoke and removethe three D.Y. wedges, and slide the deflection yoke fullyfrontward,Rotate the two purity magnet tabs (widen or narrow themutual angle made by the two tabs) to center a verticalgreen stripe. (If the vertical green stripe doesn’t beobtained, slide the deflection yoke backward)
NOTE: Do not move the vertical center position by adjustingpurity magnet.
6. Slowly slide the deflection yoke backward (or frontward)until a uniform green raster is obtained.-
Note:If some part of screen is contaminated with other colors (inmost cases it will appear at corner of screen), put the puritycorrection magnet chip on back of that corner near thedeflection yoke.
See Figure- A to position the purity correction magnet chip.Slide and rotate the purity correction magnet chip until puregreen screen is obtained,Use necessary chips until uniform green is obtained overallthe screen. Use the tape (or adhesive) to fix the magneton the picture tube.
7
.-. .8.
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Check the purity of the red and blue rasters foruniformity .(Turn up red raster and turn off green and bluerasters.Turn up blue raster and turn off green and redrasters) preadjust the deflection yoke position if necessaryuntil all rasters are pure.If part of the screen at each direction (east, west, north orsouth) is colored, demagnetize the receiver and the picturetube and adjust the deflection yoke position slightly front -ward or backward.Tighten the mounting screw of the deflection yoke andmount D.Y.wedges.
CONVERGENCE ADJUSTMENTSBefore any convergence adjustments are made, purity mustbe adjusted properly. Connect cross- hatch generator toaerial socket, Loosen locking ring provided on purity andconvergence magnet.
Note: When adjust the convergence magnets, do not movepurity magnets.
D.Y. wedge
Convergencefour- pole
P-
\“
‘agnet ‘abs \ I’li
/~
Deflection Yokemounting screw ~ >
puritycorrect magne
((Part No. ,610078599)
Convergencesix- pole
Purity magnettabs
White marklip, (North ~ole )
v DeflectIonYoke ~
,,,
G o
Fig.A
Locking ring(Some models)
1e
PurityMagnet tabs
[Purity and convergence magnets]
—4—
CENTER CONVERGENCE1.Turn off green raster and provide blue and red raster on
CRT.2. To superimpose the red/blue vertical Iines,spread (or
narrow) the angle of magnet tab 1 and tab 2. See Fig-1.3. To superimpose the red/blue horizontal Iines,rotate
the magnet tabs 1 and 2 together (keeping the angle ofmagnet tabs 1 and 2). See Fig-1.
4. Turn up green raster.5. To superimpose the green and magenta (blue/red) vertical
lines, spread (or narrow) the angle of magnet tab 3 andtab 4. See Fig.2.
6. To superimpose the green and magenta (blue/red) horizontallines, rotate the magnet tabs 3 and 4 together (keepingthe angle of magnet tabs 3 and 4). See Fig-2.Now formina white cross- hatch pattern at center of screen.
Note: Parts order must contain Service Ref. No., Key No. and Description.
6
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10 i\\\T
Key KeyNo. Part No. Description No. Part No. Description
1.
2.
3.
4.
5.
6.
7.
8.
6102212570
6102298406
6102212730
6102287370
6101042505
6102310252
6102243734
6102220681
6102280425
6102214406
Power Button 9. 6102211627 Cabinet Back
Spring (for Power Button) 6102272055 Cover (for Cabinet Back)
Transparent Panel 6102067279 FBT Holder
Door 6102317657 Rating Sheet
Push Latch
Control Indicate Sheet 10. 6102237801 Remote Control Transmitter “JXKB”
Cabinet Front Ass’y
Speaker Mounting Base(2 used)
Leg (2 used)
Speaker Grille (2 used)
..-/
—8—
L
CPU REPLACEMENT : IMPORTANT NOTEWhen IC701 (M50439- 625SP) is replaced,it is necessary to make the initializing of IC701 as followingprocedure.
(1) Switch off the TV set.(2) Replace IC701.(3) Switch on the TV set.(4) Select programme position”1” directly with the remote control transmitter.(5) Press and hold the Recall key (oftheremote controltransmitter)formore than 2 seconds, and input
SPECIAL CODE “01” using the programme selector of the remote control transmitter.(6) Press the MEMORY button of the remote control transmitter.
REMARKS: If there is mistaking the procedure, switch off the TV set and repeat steps (3) to (6).
The initializing is now completed.
Next ,operate the pre - setting of stations to allocate the TV channels.Refer to the instruction manual for this TV set.
—9—
CHASSIS ELECTRICAL PARTS LISTL
Rroduct safety should be considered when a component replacement is made in any area of a receiver.
Components indicated by a A mark in this parts list and the circuit diagram show components whose value have
special significance to product safety. It is particularly recommended that only parts specified on the following parts
\ list be used for components replacement pointed out by the mark.
O.047U K 50VO.047U K 50V4.7U M 25V4.7U M 25V4.7U M 25VO.47U M 50V2.2U M 50V0.01u z 50V
lUM 50V10U M 16V27P J 50V
0.01u z 50V2.2U M 50V0.01u z 50V100UM 16V10U M 25V
O.47U M 50V4.7U M 50VlUM 50V
120PJ 50V68P J 50V56P J 50V
o.Olu z 50Vo.Olu z 50V
lU M 50Vo.Olu z 50Vo.Olu z 50VO.47U M 50V0.01U K 50V0.01U K 50V0.01u z 50V150PJ 50Vo.Olu z 50V0.01u z 50V0.01u z 50V22P J 50V470U M 16VO.22U K 630V1000PM lK1000PM IK1000PM IK1000PM lK220UM 400V220UM 400V4700PK 50V4700PK 50VO.lU K 50V
O.oluz 50VO.oluz 50V1000PK 50V68P J 50V4.7U M 25V82P J 50V10UM 16V10UM 16V27P J 50VO.lUK 50VO.lU K 50VO.lU K 50VO.lU K 50V4.7U M 50V180P K 50V470P K 50V3900PK 50V
100 JA 1/6W1.5KJA l/6W4.7K JA l/6WlK JA l/6W220 JA 1/6W47 JA l/6W
5.6K JA l/6W100KJA 1/6W270 JA 1/4W100 JA 1/4WlK JA l/6W10K JA 1/6W22K JA 1/6W270K JA 1/6W270K JA 1/6WlK JA l/6W
1.5KJA l/6WlK JA l/6W270 JA 1/6WlK JA l/6W820 JA 1/6W470 JA 1/6W47K JA 1/6W4.7K JA 1/6W820 JA 1/6W33 JA 1/6W15K JA 1/6W12K JA 1/6W1.5KJA l/6W33K JA 1/6W1.5 JA l/6W270K JA 1/6W47K JA 1/6WlK JA l/6W150 JA l/2W150 JA 1/2WlK JA l/6W
1.5KJA l/6WlK JA l/6W
3.3K JA 1/6W22K JA 1/6W68K JA 1/6W10K JA 1/6W150KJA 1/4WlK JA l/6W
1.5K KA l/2W10K JA l/6W330 JA l/6W100 JA l/6W680 JA l/6W100 JA l/6W6.8K JA l/6W1.2KJA l/6W4.7K JA l/6W12K JA l/6W220KJA l/6W390K JA l/6W390 JA l/6W680 JA l/6W560 JA l/6W120 JA l/6W220K JA l/2W3.9 KA 6W5.6K JA l/6W22K JA l/6WlK JA l/6W22 JA l/4W
120KKA l/2W120KKA l/2W15K JA l/4W3.3KJA l/6W68 JA 2W68 JA 2W
2.7KGA l/4W5.6MKA l/2W5.6MKA l/2WlOOKJA l/4W4.7K JA l/4W150KJA l/4W47K JA l/2W22K JA l/6W120KJA l/2W
lK JA lW330 JA l/2WlMJA l/6W10K JA l/6W1.5JA lW15JA lW10K JA l/6W6.8K JA l/6W75 JA l/4WlK JA l/6W
2.2K JA l/6WlK JA l/6W
100KJA l/6W2.2K JA 2W10K JA l/6W4.7K JA l/6W10K JA l/6W68K JA l/6W100KJA l/6W68K JA l/6W12K JA l/6W1.8KJA l/6W390K JA l/6W560K JA l/6W100 JA l/6W10K JA l/6W10K JA l/6W3.9K JA l/4W10K JA l/6W10K JA l/6W10K JA l/6W4.7K JA l/6W18K JA l/6W47K JA l/6W1.5KJA l/6W8.2K JA l/6W4.7K JA l/6W10K JA l/6W39K JA l/6W470 JA l/6W27K JA l/6W3.3K JA l/6W330 JA l/6W27K JA l/6W10K JA l/6W6.8K JA l/6W6.8K JA l/6W6.8K JA l/6W100 JA l/6W5.6K JA l/6W47K JA l/6W1.8KJA l/6W820 JA l/6W560 JA l/6W2.2K JA l/6W18K JA l/6W39K JA l/6W4.7K JA l/6W22K JA l/6W18K JA l/6W27K JA l/6W4.7K JA l/6W39K JA l/6W27K JA l/6W39K JA l/6W22K JA l/6W22K JA l/6W22K JA l/6W22K JA l/6W27K JA l/6W
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Ref. No. Part No. Description Ref.No. Part No. Description