-13-
0
7
1
4
8
5
2
3
6
9
P
▲
P
▼
JXMYA
-/--
P
P
TV/AV
A B
CH SCAN
TIMER
MENU
PIC MODE
SWAP
BASS
SURROUND
(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 Item-
14 RBIAS, 15 GBIAS, 16 BBIAS, 17 RDRIV
and
19 BDRIV
mode to 64.
(5) Select Item-
20
mode to be one horizontal scanning line and turn the screen volume on the FBT to obtain just visible
one coloured line.
(6) Press the
1 (Red Bias -)
,
2 (Red Bias +)
,
5 (Green Bias -)
,
6 (Green Bias +)
,
9 (Blue Bias -)
or
0 (Blue Bias +)
button
to adjust the brightness of each colour until a dim white line produced. Please see the control button alloca-
tions in this mode.
(7) Select Item-
21 DRV
mode to enter the white balance adjusting mode.
(8) Press the
3 (Red Drive -)
,
4 (Red Drive +)
,
-/-- (Blue Drive -)
or
RECALL (Blue Drive +) button
alternately 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 14-17, 19-21 GREY SCALE
Service Mode Adjustments
Red Bias -
Red Bias +
Green Bias -
Blue Bias +
Red Drive +
Blue Drive -
Blue Drive +
Green Bias +
Blue Bias -
Red Drive -
Press the MENU
button to exit
from service
mode.
T471
FBT
Q
HO
O
C
C436
MAIN BOARD
SCREEN VR
(Under side)
