(1) Receive the monochrome circular pattern.
(2) Set the brightness and colour to normal, contrast to
maximum.
(3) Enter to the service mode.
(4) Set each value of [RBI], [GBI], [BBI] mode to 0. Set each
value of [RD], [BD] mode to 64.
(5) Select next of [DRV] mode to be one horizontal scan-
ning line and turn the screen volume on the FBT to
obtain just visible one coloured line.
(6) Press the
[1]
,
[2]
,
[5]
,
[6]
,
[9]
or
[0] button
to adjust the
brightness of each colour until a dim white line pro-
duced. Please see the control button allocations in this
mode.
(7) Select [DRV] mode to enter the white balance adjusting
mode.
(8) Press the
[3]
,
[4]
,
[-/--]
or
[RECALL] button
alternate-
ly to produce normal black and white picture.
(9) Exit from the service mode.
(10) Check for proper grey scale tracking at all brightness
levels.
NOTE: If the grey scale adjustment is made after picture
tube replacement, check the high voltage.
Items 18-24 GREY SCALE
0
7
1
4
8
5
2
3
6
9
▲
▼
BASS
JXMKL
PIC MODE
SWAP
F
-/--
P
P
Y
TV/
A
•
B
CH SCAN
TIMER
SURROUND
P
SYSTEM
-14-
(1) Connect DC meter to TP-B and the ground.
(2) Set the brightness and contrast to normal.
Tune the receiver to an active channel and synchro-
nized picture.
(3) The B-voltage must be 140 ± 1 volt DC.
(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 pic-
ture tube.
(4) The high voltage must be 29KV ± 1KV and less than
32KV at 0 beam current.
NOTE:
If the picture tube is replaced, check the high voltage.
The horiz. width adjustment affects the high voltage.
Therefore, re-check the high voltage.
(1) Receive the monochrome circular pattern.
(2) Set the brightness and contrast to normal.
(3) Adjust VR462 for optimum horizontal width.
HORIZONTAL WIDTH
HIGH VOLTAGE CHECK
B-VOLTAGE SUPPLY CHECK
ADJUSTMENT-2
Following adjustments are not required to readjust when replacing the memory IC.
Red Bias -
Red Bias +
Green Bias -
Green Bias +
Blue Bias -
Blue Bias +
Press [F] button
to exit from
service mode
Red Drive -
Red Drive +
Blue Drive -
Blue Drive +
