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Service Adjustments
MAIN BOARD
AI BOARD
Q613
POWER. OUT
Q612
POWER.
DRIVE
Pincushion Adjustment
FOCUS ADJUSTMENT
(1) Receive PAL cross hatch pattern.
(2) Select "FUERTE" picture mode with the remote control
IMAGE button.
(3) Adjust the focus control VR(H) for the best focus
vertical line on the screen center.
(4) Adjust the focus control VR(V) for the best focus
horizontal line on the top of the screen.
(5) Readjust the focus of the items (3) and (4).
FOCUS VR (V)
FOCUS VR (H)
FBT
SCREEN VR
B-VOLTAGE SUPPLY ADJUSTMENT
(1) Connect DC meter to C641(+ side) and the ground.
(2) Tune the receiver to an active channel and
synchronized picture. Select FUERTE picture mode by
pressing the IMAGE button on the remote control .
p
g
g
g
(3) Adjust B-voltage to be 140 ± 0.5 volt DC by using
(3) Ad
djust B
dj
B
B-voltag
e
e 14 ±
VR631.
VR
R631
T611
CONVERTER
TRANS.
o
0.5 volt DC C by using
SECAM BOARD
PINCUSHION ADJUSTMENT
(1) Receive the cross hatch pattern signal.
(2) Adjust so that the vertical lines to become straight by
using VR463.
HIGH VOLTAGE CHECK
(1) Receive the monochrome circular pattern.
(2) Set the brightness and contrast to maximum.
(3) Connect a high voltage probe to anode lead of the
picture tube.
(4) The high voltage must be 30.5KV ± 1KV and less than
33KV at 0 beam current (Brightness and contrast
minimum settings).
NOT
NOTE:
E:
If the picture tube is replaced, check the high voltage.
If th
e picture
be is replaced, che
-11-
TELETEXT BOARD
B-Voltage Supply Adjustment
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