Sap Vco Adjustment; Cut-Off Adjustment (Picture Adjustment); Deflection Circuit Picture Adjustment; Horizontal Center Adjustment - Hitachi 36UX59B Service Manual

MSLXU
4-3-5 SAP VCO Adjustment
Adjustment Preparation
(1) Connect a frequency counter to IS01 pin @ .
(2) Select adjustment Code "A02".
(3) Connect same circuit as in item 4-3-2(.5).
Adiustment Procedure
(1) Adjust the data "A02" by d,F keys so that the
frequency is 78.67+0.5KHz.
4-4 Cut-Off Adjustment (Picture Adjustment)
Adjustment Preparation
(1) Connect an oscilloscope at R, G, B output.
(2) Receive circle pattern signal.
Adiustment Procedure
(1)
(2)
Select adjustment code "PO3" and press
"MENU" button.
Use the cursor key d,F to adjust the red cut-off
until the amplitude of the red output waveform is
2.5V+O.lV as shown below. Adjustment for G
and B are the same procedure as R cut-off
adjustment. The only difference is the data for G
cut-off is "PO4" and B cut-off is "PO5."
2.5WO.l v
ov
4-5 Deflection Circuit Picture Adjustment
4-5-l Horizontal Center Adjustment
Adiustment Preparation
(1) Apply heat-run 5 minutes or more after the
power is turned on.
(2) Receive circle pattern signal.
(3) Set CONTRAST to maximum and others to cen-
ter.
(4) Select adjustment code "PO6".
Adjustment Procedure
(1) Adjust horizontal center so that difference of
right and left size marker is within 0.5 by adjust-
ment code "PO6", using d,F keys.
4-5-2 Vertical Size and phase Adjustment (R605)
Adiustment Preoaration
(1) Apply heat-run 5 minutes or more after the power
is turned on.
(2) Receive circle pattern signal, and set CONTRAST
to maximum and others to center.
(3) The set should face the north or south direction.
Adiustment Procedure
(1) Adjust vertical center and size so that the outer cir-
cle of the circle pattern is like the figure below by
using A,v,(,F keys and VR "R605".
V Center -+ Adjustment code "PO7"
V Size -+ VR "R605"
i) Standard Condition ii) When the picture center is
above CPT center at V center
minimum.
32":
1 I2 of the width of outer
circle comes to the
screen.
When the picture center is above
CPT center, adjust so that the
bottom of the outer circle comes
36":
Inner circle comes in
in contact with the bottom of
the screen.
contact with the
bottom and top of
the screen.
4-5-3 Side pin distortion adjustment (R777)
Adjustment Preoaration
(1) Receive crosshatch signal and set CONTRAST to
maximum.
Adjustment Procedure
(1) Adjust R777 so that the line of the right and left is
straight.
spec. DL, DR 5 5mm (for 32V)
spec. DL, DR I 7mm (for 36V)
4-5-4 Horizontal size adjustment (R755)
Adiustment Preparation
(1) Receive Circle Pattern signal.
(2) Set CONTRAST to maximum and BRIGHTNESS
to center.
Adjustment Procedure
(1) Vary R755 so that the horizontal size markers at
the right and left ends are within 1.5 (+0.5, -0).
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