Service Mode Adjustments; Main Board - Sanyo CP14CE1 Service Manual

Service Mode Adjustments

Items 17-20, 22-24 GREY SCALE
(1) Receive a monochrome circular pattern.
(2) Set the brightness and colour to normal, contrast to maximum.
(3) Enter to the service mode.
(4) Select No. 17 RBIAS (Red Bias), No, 18 GBIAS (Green Bias), and No. 19 BBIAS (Blue Bias) and set each data to 0
by pressing the VOLUME + or - key.
(5) Select No. 20 RDRIV (Red Drive) and No. 22 BDRIV (Blue Drive) and set each data to 64 by pressing the VOLUME
+ or - key.
(6) Turn Screen Control on the FBT (T471) to minimum (fully counter-clock-wise).
(7) Select No. 23 (1-line appear).
(8) Advance Screen Control clockwise to obtain just visible one colour line. If line does not appear, place this control to
maximum (fully clockwise).
(9) Raise each Bias Level with 1, 2, 5, 6, 9 and 0 keys to obtain just visible white line.
(10) Select No. 24 DRV (Drive Adjustments).
(11) Adjust Red and Blue Drive Levels alternately with 3, 4, -/-- or RECALL key to produce normal black and white
picture in highlight areas.
(12) Check for proper grayscale at all brightness levels. To turn off the TV Service Menu display, press the MENU key.
Note: If the Grayscale adjustment is made after picture tube replacement, check the High Voltage
Blue Drive +
Red Bias -
Red Drive +
Green Bias -
SWAP
Blue Drive -
Blue Bias +
TV/AV
TIMER
x
2 3
1
5 6
4
8 9
7
P P
-/--
0
CH
CH SCAN
MENU
.
A B CH PICTURE
SOUND S. SYS
BASS
SURROUND
JXPSC
Red Bias +
Red Drive -
Green Bias +
Blue Bias -
Press the MENU button to exit
from service mode.
-12-

MAIN BOARD

T471-H2 T471-H1
SCREEN VR
(Under side)
R4