-13-
Service Mode Adjustments
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
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.
JP646
JP645
6
D432
KDY-4
KDY-3
KDY-1
T471A
T471
T471-H4
T471-H7
T471-H12
T471-H10
T471-H1
T471-H2
L441
T471-H11
R477
D485
R488
R424
C471
L631
R48
R355
1
R486
R485
L441
L441A
L441-H3
C437
C435-H2
C435-H1
C435-H4
T471
FBT
MAIN BOARD
SCREEN VR
(Under side)