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CT-S1390Y |
Measurements and Adjustments
CAUTION
FOR
SERVICING
2. Do not short the HOT section to the COLD section.
This could blow the fuse or even damage parts.
Th
mede
hes Te
MOT
and
COL
section
Ait
Tha
3. Never measure the HOT section and the COLD section
ower
supply
section.
Therefore
followin
recaution
$
:
4
"
pp'y
g P
m
at the same time when using tools such as oscilloscopes
are necessary.
1. Do not touch
the HOT
section and the COLD section
at the same time.
You
may
receive an electric shock.
or multimeters.
4. Always unplug the unit before beginning any operation
such as removing the chassis.
5. For each adjustment, when a connector or a short jumper
Unless otherwise noted, a transformer core with two tuning
is connected
or disconnected,
first set the power switch
peak points should be adjusted at the lower position as shown
to the OFF position.
in below Fig. 1.
LOWER SIDE
UPPER SIDE
Transformer
РГ
Гай
d a
a
o ee
o
RALAR
Fig. 1
+B VOLTAGE
ADJUSTMENT
(A-P.C. board)
1. EQUIPMENT
TO USED
Digital Voltmeter
Table 1
Tuner Unit.
2. ADJUSTMENT
PROCEDURE
1. Set the Brightness and Contrast control to minimum,
+
and delete the raster.
TPA6
TPA5
11.141V
ТРА7
(COLD GND)
2. Connect a Digital Voltmeter between each + B points
ТРАЗ
TPA10
24.5+2\
17.33:2V
186
15V
and the ground as shown in Table 1.
3. Confirm that the indicated measurement points for the
specificated voltage.
PURITY
ADJUSTMENT
1. EQUIPMENT
TO USED
Video Generator
5.
External Degaussing Coil
2. ADJUSTMENT
PROCEDURE
1. Operate the monitor over 30 minutes.
2. Fully degauss the picture tube by using an external
Purity Magnets
degaussing Coil.
3. Set the Input Selector Switches to LINE A.
Green Field
4. Input a cross hatch pattern to VIDEO input terminal.
Fig. 2
5. Adjust roughly convergence
by using the static and
convergence magnets and deflection yoke.
10. Slide the deflection yoke toward you so that good
6. Input a black and white signal to VIDEO input terminal.
purity is obtained.
7. Loosen clamp screw of the deflection yoke.
11. Confirm the purity with a red and a blue screen.
8. Slide the deflection yoke toward the picture tube by
12. Emit the Red. Green and Blue at the same time.
activating green only.
13. Confirm the white quality.
9. Adjust the purity magnets so that green bar is obtained
14. Tighten clamp screw when complete.
at the center of the picture.
ке ЙД же
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