Table of Contents
Advertisement
Items 18-24 GREY SCALE
(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.
ADJUSTMENT-2
Following adjustments are not required to readjust when replacing the memory IC.
B-VOLTAGE SUPPLY CHECK
(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.
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 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.
TV/
Red Bias +
1
Red Bias -
4
Red Drive -
7
Green Bias -
0
Blue Bias +
SYSTEM
F
SWAP
Press [F] button
to exit from
service mode
HORIZONTAL WIDTH
(1) Receive the monochrome circular pattern.
(2) Set the brightness and contrast to normal.
(3) Adjust VR462 for optimum horizontal width.
-14-
TIMER
Red Drive +
3
2
5
6
A
B
•
8
9
BASS
Green Bias +
-/--
Blue Bias -
SURROUND
Blue Drive +
▲
P
▼
Blue Drive -
P
P
CH SCAN
Y
PIC MODE
JXMKL
Advertisement
Table of Contents
