Sanyo CZP2135V User manual

—
Service Manual Colour Television
1-A=T’11 /
Specifications
--
Power source . . . . . . . . . AC 230V(AC160V-290V),50HZ
Power Consumption. ....72 Watts
Television System. . . System-B/G
Colour Reception System .. PAL
Channel Coverage . . . . . . VHF:l-11
UHF:21-69
Video iF . . . . . . . . ..38.9MHz
Sound lF . . . . . . . . ..33.4MHz
Aerial Input Impedance . . 75Q
Picture Tube . . . . . . . . 52.5cm Diagonal ,90 Degree.
Semiconductors . . . . . . .32 Transistor, 6ICs
Audio Output . . . . . .3.0 Watts
Dimensions . . . .516( Width) x475( Height) x495( Depth)mm
Weight . . . . . . . . . .21.4kg
*Specifications subject to change without notice.
W% CZP2135V-20
(NEWZEALAND)
Model No. cZP2135V
OR IGINAl_VERSl ON
Chassis Series A2-B21
E
Give complete “SERVICE REF. NO.”
~OTE 1
This T.V. receiver will not work
properly in aforeign countries
where the television transmission
system and power source differ
from the design specif icat ions.
Refer to the specifications for
the design specifications.
D8RJ REFERENCE NO.WM-520054

INSTALLATION
MAIN UNIT
AND SERVICE ADJUSTMENT B1 POWER SUPPLY ADJ.
VIDEO DET. ADJ.
Fm SEARCH
FUNCTION (+) (-) (+) (-) W3DE SAND (+) (-) MEMO TviVIDEO
301
~n;
4
WC PRE-AMP. SW Sw Sw SW331 SW332
321 323 324
SW301 14 Till
.6 0,., I-t I‘w e——’z—z•1
HEAD-
PHONE
JACK
~
Iu
LQw-
-=1-~ “’’’RTERYr-
SCREEN
UPPER)
pocus
UNDER
mKSV~ Q431
\r 9
uTPG
H-DRIVE :
HORIZONTAL
CENTER ADJ. FOCUS ADJ.
COLOUR ADJ.
/
vR602
BLUE DRIVE
vR612
REO DRIVE
vR601
8LUE OIAS
vR61 1
RED O,AS
vR621
GREEN BIAS
\M\SUB BRIGHTNESS ADJ.
)AVERTICAL CENTER ADJ.
/
Vertical centring can be adjusted by
connecting vertical tip to anyone of
three terminals.
I\
GREY SCALE AND )
TRACKING ADJ.
/
/
1. Tune the receiver to mon~hmme circular pattern.
2. Set contrast and bright to maximum.
3. If picture is too wide or narrow, cut or short lead (AJl).
If lead is shorted, horiz. Width Increase.
If lead is cutted, horiz. Width Decrease.
NOTE: Horiz. width adjustment affects high voltage and sub
brightness. Therefore, recheck SUB-BRIGHTNESS and
HIGH VOLTAGE. –2–
Grey
Fig. 1
-.

.SAFETY PRECAUTIONS
An isolation transformer should be connected in the power line between the receiverand the AC line beforeany
sewice is performed on the receiver.
INSTALLATION AND SERVICE ADJUSTMENTS
X-RADIATION PRECAUTION The primary source of X-RADIATION,in television receiver is the picture tube. The picture tube ia ~
cially constructed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must be the
same type as the original including suffix letter. Excessive high voltage mav Produce potentially hazardous X-RADIATION. To
avoid such hazards, the high voltage must be maintained within specified limit: Refer to this eewice manual, high v@tage for
specific high voltage limits. If high voltage exceeds SpeCifkd limits, take necessary corrective action. carefully fOllOWthe inet~c.
tions for +B1 volt power supply adjustment, and high voltage check to maintain the high voltage within the specified limits.
AGC AMJSTMENT
NOTE: Do not attempt this adjustment with weak signal.
,1.
:
2.
3.
v
Tune receiver to most clearest (or strongest) VHF station in
your area.
Set brightness and contrast controls to maximum.
Set colour control to minimum.
Set the AGC (VR101) control to mid-range.
Turn AGC control in direction which causes snow to appear,
then in the opposite direction until the snow just disappears.
SUB BRIGHTNESS AWUSTMENT
1.Connect aDC meter between “TP-H” (positive lead) and
“TP-G” (negative lead) on main unit.
2. Receive the circular pattern.
3. Set brightness to maximum and contrast to minimum,
4. Adjust sub brightness control (VR211) for 0.3V
N~E: If picture tube replace. Check Sub-brightness ad-
justment.
VERTICAL SIZE AilWSTMENT
1. Tune the receiver to mono-chrome circular pattern.
2. Adjust vertical size (VR451) control for full scan.
HORIZONTAL CENTER A~USTMENT
1.
2.
3.
LB1
Tune the receiver to mono-chrome circular pattern.
Set the brightness and contrast to maximum.
Adjust Video Phase (VR411) for optimum horiz center po-
sition.
POWER SUPPLY AIXH.JSTMENT
1. Connect DC meter to “TP-B” and ground.
Set the +B1 adjustment control (VR311) to mid-range.
2. Set brightness and contrast to minimum.
iTune the receiver to an active channel and synchronize pic-
ture.
3. Adjust +B1 adjustment control for 131~1.O volt DC.
TUNING DISPLAY WIDTH AWJSTMENT
1. Tune the receiver to mono-chrome circular pattern.
2. Set the mode switch (SW331 C) to on.
Tuning bar is displayed on screen.
3. Adjust VR 750 on the V/S UNIT for optimum the tuning bar
width.
Set the mode switch to off.
VIDEO DET. AMJSTMENT
1.
2.
w
Tune receiver to colour bar pattern. (See Fig. 1)
Connect the oscillator to TP-F.
Adjust VR121 for 1.0f0.05Vp-p (Video det. waveform),
GREY SCALE AND TRACKING AWUSTMENT
Tune the receiver to mono-chrome pattern.
1.
2
3.
4.
5.
6
7.
8
Set the brightness and the contrast to maximum,the colour
to normal.
Connect the service tip to KSV-2 (service condition).
Set screen control to minimum. (fully counter-clockwise).
Turn screen control to obtain just visible one coloumd line.
Adjust each bias (VR621-Green, VR601-Blue, VR611-Red)
controls alternately until adim white line produced.
Re-connect the service tlp to KSV-l (normal condition).
Adjust red (VR612) and blue (VR602) drive controls alternate
Iy to produce normal black and white picture.
Check for proper grey scale tracking at all brightness Iewk.
NOTE If grey scale adjustment IS made after picture tube
replacement, check high voltage and subbrightnees
adjustments.
COLOUR A~USTMENT (PAL)
Receive colour bar pattern. (See Fig. 1)
Set’s controls: brightness .......maximum
colour ........... maximum
contrast .........mid-range
\ADJUST IREMARKS
Connect the oscilloscope to TP6B on CRT unit.
Adjust VR251, T281 to obtain each lH
r
1VR251 ,T281
I
—
2T211
waveform (amplitude) for same as shown
below. &ll-1+-lH+
~... ““n
uB-Y WAVE;ORM
Figure 2
Adjust T211 to obtain proper waveform a:
shown in Figure 2.
FOCUS ACAJUSTMENT
Adjust focus control on the right side of the chassis for well
scanning lines.
HIGH VOLTAGE CHECK
1.Tune the receiver to the circular pattern.
2. Set brightness and contrast to maximum.
3. Connect ahigh voltage probe to anode lead at picture tube.
4. High voltage must measure between 26- 28KV.
NOTE: If picture tube replace, check high voltage.
–3–

PURITY AND CONVERGENCE AMJSTMENT
WTION; Convergence and Purity have been facto~ aligned. Do not attempt to tamper with these alignments. Howevar, the ef-
fects of adjacent raceiver components, or replacement of picture tuba or deflection yoke may requira the need to readjust purfty
and convergence. If adjustment is required, the adjustments should be made in the following sequence.
PURITY ADJUSTMENTS
1.
2.
3.
4.
5.
6.
7
Use acolour (Red, Green and Blue) pattern signal.
Receiver should be operated for at least ten minuter,
Place the picture tube face east or west and demagnetize the
picture tube and receiver using an external degaussing coil,
Turn off Red and Blue rasters and provide only Green raster
on CRT screen.
Loosen the screw holding the Deflection yoke and remove
the 3D.Y. wedges, and slide the Defection yoke fully
frontward.
Rotate the two purity magnet tabs (widen or narrow the mutu-
al angle made by the two tabs) to centre avertical green
stripe.
(If the vertical green stripe doesn’t obtain. In case, slide the
deflection yoke backward).
N(Yf_E: Do not move the vertical centre position by adjusting
purii magnet.
Slowly slide the Deflection yoke backward (or frontward) until
auniform green raster is obtained.
r?mE
If some part of screen is contaminated with other colors (in
most cases it will appear of corner of screen), put the Purity
correction magnet chip on back of that corner near the
deflection yoke.
See Figure-A to position the Purity correction magnet chip.
Slide and rotate the Purity correction magnet chip until pure
green screen is obtained.
Use necessary chips un~l uniform green is obtained overall
the screen.
Use the tape (or adhesive) to fix the magnet on the picture
tube.
Check the purity of the red and blue rasters for uniformity.
(Turn up red raster and turn off green and blue rasters.
Turn up blue raster and turn off green and red rasters).
Readjust the Deflection yoke position if necessary until all
rasters are pure.
If part of the screen at each direction (east. west, north or
south) is colored, demagnetize the receiver and the picture
tube and adjust the Deflection yoke position slightly front -
ward or backward.
8. Tighten the mounting screw of the Deflection yoke and
mount D.Y.wedges.
CONVERGENCE ADJUSTMENTS
Before any convergence adjustments are made, purity must be
adjusted properly. Connect cross-hatch generator to aerial
socket.
Loosen Iockmg nng provided on purity& convergence magnet.
Notice: When adlustthe convergence magnets, do not move
puritymagnets.
DY WEDGE
(CONVERGENCE)
&
*
FOUR-POLE \g
MAGNET TABS ,
E)
DEFLECTION YOKE
MOUNTING SCREW 45,1
PuRITY MAGNET
TABS
Purity White mark
Correct magnet chip (north pole, Part No. 610076 599)
(
(
PURITY
MAGNET
LOCKING
RING
(SOME MODELS)
1
PURITY AND CONVERGENCE MAGNETS
–4–

CENTRE CONVERGENCE
1.
2.
—3.
4.
5
6.
Turn off green raster and provide blue and red raster on CRT
To s~perlmpose the red/blu? vert.imes. spread (ornarrow)
the angle of magne: tab 1 berwee~ tab.2 See Fig-l.
To superimpose the red/blue nori~ Ilnes,rotatethe magnet
tabs 1 and 2 together (Keep!ng the angle of magnet tatx 1
and 2).See FKJ-1.
Turn up green raster
To superimpose the green arm magema (blue/red)ver?.Imes.
spread (ornarrow) the angle of magnet tab 3 between tab 4
See Fig-2.
To superimpose the green and magenta (biue/ret!)nonz
hnes, rotate the magnet tabs 3 and 4together [keepng the
angle of magnet tabs 3and 4) See Fig-2
Now formmg white cross-hatch pattern at centre of screen.
Fasten Iockmg ring,
\
OUTER AREA CONVERGENCE
If mis-convergence on the outer area exits, as follow adjustment.
GREEN
BLUE= // RED
7’r
.,.f
4
,. I
;:”
—.~ \
--_r,---
f;“?
.. ...
-....,
\
II
1’
I
I\
t
~ I+RED
~Spread Ior narrow) tabs angle to
superimpose b!ue and red vertlcai
Itne
Rotate tabs together to
superimpose red and blue
horizontal hne.
Constanl .
‘/
$(2
1
/)/ Rotate
Spread
(or narrow)
[$2
1
Figure 1-BLUE AND RED LINE MOVEMENT
a+’
“uE’REDlii8
-—------—---------
.+.
Spread (or narrow) tabs angle to
superimpose red/blue and green
vertical Ilne.
Rotate tabs together to
superimpose redlblue and
green horizontal Ime,
C=t
,.
m
r
:3;4
/~
Rotate
Spread (or narrow)
Figure 2- BLUE/RED AND GREEN LINE MOVEMENT
I
I
Deflection
t?: Yoke
K1 o
@
t::
Swing the Deflection Yoke the ~direction, Red/Blue lines on the screen move thee direction.
Swing the Deflection Yoke the ~direction, Red/Blue lines on the screen move the@ direction.
BLUE
/GREEN
// RED
.. iq{“
-----:- -- -
BLUE -+-T 4-RED
GREEN- I-GREEN
RED- ?I‘BLUE
-; :. -
.::,L:.
I
I?4 :
II
b
Swing the Deflection Yoke the +direction, Red/Blue lines on
Swing the Deflection Yoke the edirection, Red/Blue lineson
To fasten the Defection Yoke, Insert and fix the D.Y.spacer.
–5–
the screen move the ~direction.
the screen move the @direction.