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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 140± 0.5V DC by using VR641.
AGC ADJUSTMENT
NOTE: Do not attempt this adjustment with weak signal.
(1) connect digital voltmeter 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 item No. 188 "AGC TAKE OVER"
(4) Press the Volume (+) or Volume (-) button to adjust voltage
to be 3.25 ± 0.25V 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 cross hatch pattern.
(2) Set the picture mode to Dynamic.
(3) Enter to the service mode item No. 08 "VG2".
(4) Turn screen VR on F.B.T. from min. to max., then the display
will change from below to above. Turn back the screen VR to
min. side, appear below with OK is displayed then stop turn-
ing.
WHITE ADJUSTMENT
(1) Receive circular pattern.
(2) Set the picture mode to Dynamic.
(3) Enter to the service mode "Red" item No. 64 "WPR-N".
(4) Adjust white balance by Volume (+) or Volume (-) button.
(5) Enter to the service mode "Green" in item No. 65 "WPG-N".
(6) Adjust white balance by Volume (+) or Volume (-) button.
(7) Enter to the service mode "Blue" in item No. 66 "WPB-N".
(8) Adjust white balance by Volume (+) or Volume (-) button.
All manuals and user guides at all-guides.com
PCC ADJUSTMENT
PCC ADJUSTMENT
(1) Receive cross hatch pattern, set the picture mode to Natural.
(2) Enter to the service mode item No. 23 "EW PARABOLA".
(3) Press the Volume (+) or Volume (-) button to adjust the ver-
tical line to be straight.
TRAPEZOID ADJUSTMENT
(1)
Receive cross hatch pattern, set the picture mode to Natural.
(2)
Enter to the service mode item No. 24 "TRAPEZIUM" for fre-
quens.
(3)
Press the Volume (+) or Volume (-) button to correct the
trapezium distortion of the vertical line.
CORNER ADJUSTMENT
(1)
Receive cross hatch pattern, set the picture mode to Natural.
(2)
Enter to the service mode item No. 25 "UC PARABOLA" for
top corner adjustment or item No. 26 "LC PARABOLA" for bot-
tom corner adjustment.
(3) Press the
tortion of the vertical line around the corners..
-16-
Volume (+) or Volume (-) button to correct the dis-
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