1-20 (No.YA164)
4.8.3 DEFLECTION CIRCUIT
There are 3 aspect modes ( 1. REGULAR, 2. ZOOM, 3. 16 : 9) of the adjustment.
Depending upon the kind of signals ( Vertical frequency 120Hz-i / 100Hz-i / 60Hz-p).
120Hz-i is a signal that is output to a screen when a 60Hz signal is input to a television set. It is an interlace-scanned picture of 120Hz.
100Hz-i is a signal that is output to a screen when a 50Hz signal is input to a television set. It is an interlace-scanned picture of 100Hz.
NOTE :
At first the adjustment in 100Hz mode should be done, then the data for the other aspect mode is corrected in the respective value
at the same time. And confirm the deflection adjustment initial setting value in 60Hz (NTSC EXT mode) mode. If the adjustment in
100Hz each aspect mode has been done and stored, the data for the same aspect modes in 60Hz is corrected in the respective
value. Only the data for the other aspect mode in 60Hz is corrected for itself.
When the 100Hz mode has been established, the setting of other modes will be done automatically. However, if the picture quality
has not been optimized, adjust each mode again, respectively.
The adjustment using the remote control unit is made on the basis of the initial setting values.
The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
To switch aspect modes, use the [ZOOM] key of the remote controller.
Item
Measuring
instrument
Test point
Adjustment part
Description
V. POSITION
Signal
generator
Remote
control unit
[4. DEF]
1. V-SHIFT
14. V-LIN
(1) Receive a circle pattern signal of vertical frequency
50Hz (PAL).
(2) Set the ZOOM mode to REGULAR.
(3) Select 4. DEF from the SERVICE MODE.
(4) Select < 1.V-SHIFT >.
(5) Adjust to become A = B.
(6) Check the adjustment value above in other zoom
mode. If it is a wrong adjustment, re-adjust in ZOOM
mode and adjust by < 1. V-SHIFT >, < 14.V-LIN >.
(7) Press the [OK] key to memorize the set values.
V. SIZE
Signal
generator
Remote
control unit
[4. DEF]
2.V-SIZE
(1) Receive the PAL cross hatch signal.
(2) Set the ZOOM mode to REGULAR.
(3) Select 4. DEF from the SERVICE MODE.
(4) Select < 2.V-SIZE >.
(5) Set the initial setting value of < 2.V-SIZE >.
(6) Adjust to make sure that the vertical screen size of
the picture size is
93%
.
(7) Press the [OK] key to memorize the set values.
(8) Input the NTSC VIDEO signal (60Hz) from the EXT
terminal, and make sure that the vertical screen size
is
93%
.
(9) Press the [OK] key to memorize the set values.
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