1-34 (No.YA068)
4.10.5 DEFLECTION CIRCUIT
There are 2 kind of adjustment for the DEFLECTION circuit, PAL and NTSC. The adjustment using PAL signal is as the standard of
all DEFLECTION adjustment. The "#" mark in the table given below expresses the number of each adjustment item. The screen aspect
ratio 4 : 3 at 50Hz (PAL) is regarded as the reference value for all adjustments. The other values obtained in the adjustments using
other signals become the offset values as opposed to the reference values.
Therefore, the adjustments must always be carried out in order of PAL and NTSC. When it does not adjust in this turn, and when
operation which is different by the middle is carried out, it is necessary to readjust from the beginning.
Mode
Display
Aspect ratio Scan size Vertical frequency
4:3 NORMAL SCAN
50Hz(PAL) D0#
60Hz(NTSC) DA#
16:9 NORMAL SCAN
50Hz(PAL) DB#
60Hz(NTSC) DC#
4:3 UNDER SCAN
50Hz(PAL) DD#
60Hz(NTSC) DE#
16:9 UNDER SCAN
50Hz(PAL) DF7, DF8
60Hz(NTSC) DG7, DG8
Although the procedure is described about the adjustment at the time of inputting a PAL signal into below, please perform adjustment
which inputs an NTSC signal continuously.
However, about each adjustment item of "Vertical center", "Vertical linearity", "16:9 Vertical size" and "Horizontal size and center at
the time of under scan mode", it considers as the adjustment only to a PAL signal, and adjustment with an NTSC signal is not
required.
Item
Measuring
instrument
Test points Adjustment part Adjustment procedure
H. POSITION /
H. SIZE
Signal
generator
[DEFLECTION
BLOCK]
D01 : H. CENTER
D02 : H. SIZE
(1) Input the PAL crosshatch signal.
(2) Select DEFLECTION BLOCK with [VOLUME /SE-
LECT - ] button (< DEF >) from < BLOCK SELECT >
SERVICE MENU screen.
(3) Adjust < D01 >(H.CENTER) to align the picture cen-
ter with the CRT center.
(4) Adjust < D02 >(H. SIZE) to set horizontal size to
95%.
(5) Repeat above step 4 and 5 to adjust correctly.
4:3 SIDE
PINCUSHION
Signal
generator
[DEFLECTION
BLOCK]
D07 :
SIDEPIN PARABOLA
D08 :
SIDEPIN CORNER
(1) Input the PAL crosshatch signal.
(2) Confirm the side pincushion of the four corners in the
screen.
(3) If not optimum, adjust < D07 >(SIDEPIN PARABOLA)
and < D08 >(SIDEPIN CORNER) to become correct-
ly.
Picture size 100%
Screen size 95%
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