Focus Adjustment - Sanyo CP32WF2 Service Manual

Adjustments
IMPORTANT NOTICE
Do not attempt to adjust the following service adjustments except when adjustments are required in servicing other-
wise it may cause loss of performance and product safety.
+B VOLTAGE ADJUSTMENT
(1) Connect a DC voltmetre to TP-B and the ground.
(2) Tune the receiver to an active channel and synchronized pic-
ture. Select NATURAL picture mode by pressing the Picture
mode selection button on the remote control .
(3) Adjust voltage to 150± 0.5V DC by using VR641.
AGC ADJUSTMENT
NOTE: Do not attempt this adjustment with weak signal.
(1) Connect digital voltmetre to TP-A and GND.
(2) Tune the receiver to most clearest (or strongest) VHF station
in your area. Set the brightness and contrast controls to max-
imum. Set the colour control to minimum.
(3) Enter to the service mode and select mode "Regular", and
select item No. 01 "Regular 01 AGC"
(4) Press the Level up (+) or Level down (-) button to adjust
voltage to be 3.2± 0.2V DC.

FOCUS ADJUSTMENT

(1) Receive a monochrome circular pattern.
(2) Set the brightness to normal and contrast to maximum.
(3) By using FOCUS VR on the F.B.T., adjust focus control for
well defined canning lines.
GREY SCALE ADJUSTMENT
SCREEN ADJUSTMENT
(1) Receive black & white pattern.
(2) Set the brightness and colour to normal, contrast to maxi-
mum.
(3) Enter to the service mode and select mode "Regular", then
select item No. 02 "Regular 02 CUT". The horizontal line will
appear on the screen.
(4) Using the numeric buttons shown set each colour to minimum
by decreasing to the point where any further decrease resets
the adjustment to maximum value.
BIAS ADJUSTMENT
(5) By using the buttons 1, 2, 4, 5, 7, 8 on the remote control,
adjust the line to be white.
The key allocation is as follows;
Button No. Operation
1 Increase Red
2 Decrease Red
4 Increase Green
5 Decrease Green
7 Increase Blue
8 Decrease Blue
DRIVE ADJUSTMENT
(6) Select item No. 3. "Regular 03 GRY" (G-Drive) or No. 04
"Regular 04 GRY" (B-Drive) and adjust both initially to 40.
(7) Change data value of each item by using Level up (+) or
Level down (-) button to obtain the proper white balance.
PCC ADJUSTMENT
PCC ADJUSTMENT
(1) Receive cross hatch pattern and set screen mode to "FULL".
(2) Enter to the service mode and select mode "Image", and
select item No. 07 "Image 07 P E-P".
(3) Press the Level up (+) or Level down (-) button to adjust the
vertical line to be straight.
TRAPEZOID ADJUSTMENT
(1) Receive cross hatch pattern and set screen mode to
"FULL".
(2)
Enter to the service mode and select mode "Image", and
select item No. 08 "Image 08 P E-T".
(3) Press the
Level up (+) or Level down (-) button to correct
the trapezium distortion of the vertical line.
CORNER ADJUSTMENT
(1) Receive cross hatch pattern and set screen mode to
"FULL".
(2)
Enter to the service mode and select mode "Image", and
select item No.11 "Image 11 P ECT" for top corner adjustment
or item No. 12 . "Image 12 P ECB" for bottom corner adjust-
ment.
(3) Press the
Level up (+) or Level down (-) button to correct
the distortion of the vertical line around the corners..
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