Sanyo CP21SE1, Service Manual

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Service Mode Adjustments
T471H7
T471H10
MAIN BOARD
SCREEN VR
(Under side)
(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. 168 CUT OFF (R), No, 169 CUT OFF (G), and No. 170 CUT OFF (B) and set each data to 0 by pressing
the or - key.
(5) Select No. 167 WHITE BALANCE (R-Drive and B-Drive) and set data to 3F by pressing the or - key.
(6) Turn Screen Control on the FBT (T471) to minimum (fully counter-clock-wise).
(7) Select No. 171 (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 CUT OFF Level with 1, 2, 3, 4, 5 and 6 keys to obtain just visible white line.
(10) Select No. 167 WHITE BALANCE (Drive Adjustments).
(11) Adjust Red and Blue Drive Levels alternately with 1, 3, 4 or 6 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
Items 167 - 171 GREY SCALE
1
2 3
4
5 6
7 8 9
0
TV/AV
TIMER
x
-/--
SWAP
CH SCAN
MENU
BASS
SOUND
S. SYS
SURROUND
PICTURE CH
CH
A B
.
P P
JXPSC
R-CUT OFF +
Press the MENU button to exit
from service mode.
R-Drive +
G-CUT OFF +
R-CUT OFF -
R-Drive -
G-CUT OFF -
B-CUT OFF +
B-Drive +
B-CUT OFF -
B-Drive -
SM_21-BB2Y(AC7-A)Aus 11/3/07 10:42 AM Page 14