Adjustment Method - Samsung MP5671 Service Manual

• ADJUSTMENT METHOD
1. CONDITIONOF ADJUSTMENT PROCEDURE
1) Input Source
2)
Warm up Time
3) Contrast
4) Brightness
5) Pattern
2.
CAUTION
120VAC, 60Hz
220VAC/240VAC, 50Hz
(Selected in 220VAC/240VAC
by inter-jumper J 1 from J 11 OV
to J220V)
More than 30 minutes
Max
25 F/L
Unless otherwise specified,
Cross-Hatch Pattern.
1) Unless otherwise specified, adjustment and check
should be made under the standard condition.
2) To be sure image width, height and distortion,
proceed as below:
\ - i - - - - ) - -
Eye
*
Measure level with respect to tube axis.
3) Unless otherwise specified, make DC voltage
measurement, using a digital voltmeter.
4) Hold the CRT surface illumination to 25 F/L at
the time of adjusting the brightness and also con-
firm them.
3. ADJUSTMENT ITEM
1) Power Supply Adjustment
CD
Condition: Without Signal
®
First adjust the power supply unit before
adjusting all controls. Also connect the power
supply unit to the display unit and turn the
unit on.
®
Turn VR603 (L/v ADJ) to adjust the voltage
across the GT4 and the ground to 75V ± 0.5V.
2) H-HOLD Adjustment
CD
Condition: Without Signal
®
Turn VR301 (H-HOLD VR) to adjust the fre-
quency across the H-DY wire (blue) and ground
(chassis bracket) to 60 ± 0.5KHz.
3) V-HOLD Adjustment
CD
Condition: Without Signal
®
Turn VR201 (V-HOLD VR) to adjust the fre-
quency across the V-DY wire (yellow) and
ground (chassis bracket) to 54 ± 2Hz.
9
4) Raster-Centering Adjustment
CD
Condition: Without Signal
®
Locate VR402 (SUB-BRIT. VR) and EXT-
BRIT. VR to max position.
®
Turn Centering-Magnet Until raster comes to
the center of the screen.
5) H·PHASE Adjustment
Inner bazel
Raster
a
=
a'
b=b'
CD
Condition: Cross-Hatch Pattern
®
Locate VR402 (SUB-BRIT. VR) EST-BRIT.
VR and EXT-CaNT. VR to max Position.
®
Adjust display area to horizontal center of
raster using VR101 (H-PHASE VR).
Raster
Display
area
...
6) Tilt Adjustment
a'
a = a'
Loosen the deflection yoke clamp, and turn in the
arrow directions to adjust the tilt within 0.5".
7) Geometric Distortion Adjustment
Adjust each correcting magnet to set rightly until
the square line of the Cross-Hatch pattern becomes
to be linear. (to come within Over-Lay Jig).
8) High Voltage Adjustment
CD
Condition: with Signal
®
Locate EXT-BRIT. VR and EXT-CaNT. VR
to max position.
®
Connect H/V meter prove (-) terminal to
ground (chassis bracket) and
(+)
terminal to
anode cap of CRT.
@
Turn VR302 (H/V-ADJ VR) to adjust 17 ±
0.5KV.