Service Adjustments - Sanyo CP25AF3T Service Manual

Service Adjustments

MAIN BOARD
Q613
POWER. OUT
Q612
POWER.
DRIVE
Pincushion Adjustment
FOCUS ADJUSTMENT
(1) Receive the monochrome circular pattern.
(2) Set the brightness to normal and contrast to maximum.
(3) Adjust the focus control on the F.B.T for the best focus
on the screen centre.
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 DYNAMIC picture mode by
pressing the VSM (Video Status Memory) button on
the remote control .
(3) Adjust B-voltage to be 140 ± 0.5 volt DC by using
VR631.
T611
CONVERTER
TRANS.
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 29.5KV ± 1KV and less than
32KV at 0 beam current. (Brightness and contrast
minimum settings).
NOTE:
If the picture tube is replaced, check the high voltage.
-10-
TELETEXT BOARD
B-Voltage Supply Adjustment