Sanyo CP29ST2 Service Manual page 14

(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 O. 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 coiour until a dim white line pro-
duced. Please see the control button allocations in this
mode.
(7) Select [DRVl 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.
Red Bias ~
Red Bias - _
Green Bias +-
Green Bias --
Blue Bias A
Blue Bias --
LIRROUND BASS
VAOB
000
Nton to
exit from service mode
/
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H
Red Drive +
s
D-60 r"
Red Drive -
G;: ,-Blue Drive+
m -1--
- Blue Drive -
6
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A /=T''F%-P=l * I
—
ADJUSTMENT-2
Following adjustments are not required to readjust when replacing the memory lC.
(1) Connect DC meter to TP-B and the ground.
(1) Receive the monochrome circular pattern.
(2) Set the brightness and contrast to normal.
(2) Set the brightness and contrast to normal.
Tune the receiver to an active channel and synchro- (3) Adjust VR462 for optimum horizontal width.
nized picture.
(3) The B-voltage must be 140* 1 volt DC.
(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 O 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.
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