JVC AV28T67SKE
Manual de Servicio

AV-28R370KE AV-28T67SKE AV-28T35SPE 3.6.6 DEFLECTION CIRCUIT ADJUSTMENT (1) The deflection 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. (2) There are 12 kinds of adjustment modes with the combination of vertical frequency and zoom mode. � Vertical frequency : 50Hz, 60Hz. � Screen zoom mode : PANORAMIC, REGULAR, 14:9 ZOOM, 16:9 ZOOM, 16:9 SUB TITLE, FULL a) At first, the adjustment in 50Hz-PANORAMIC mode should be done. Then the adjustment for the other zoom mode is corrected in the respective value at the same time. b) However, if the picture quality has not been optimized, adjust each zoom mode again, respectively. c) Then confirm the initial setting value of 60Hz-PANORAMIC mode. If adjustment in 50Hz each zoom mode has been done in very high accuracy, the adjustment for the same zoom mode in 60Hz is corrected in the respective value. Adjustment is completed at this time. d) If the picture quality in 60Hz has not been optimized, adjust each zoom mode again in 60Hz, respectively. In this case, only 60Hz each zoom mode is corrected. Item V.POSITION Measuring instrument Signal generator Remote control unit Test point Adjustment part [4.DEF] 1. V- SHIFT Description � First of all, perform the adjustment in the 50Hz PANORAMIC mode. � Set the ZOOM to PANORAMIC. (1) (2) (3) (4)
A

Receive the circle pattern signal. Select 4.DEF. Select <1.V-SHIFT>. Adjust <1.V-SHIFT> to become A = B as shown in figure. (5) Press the [OK] key and memorize the set value. NOTE : adjust by <11. V-LIN> after mentioned. And store the get value.

B

V.SIZE

Signal generator Remote control unit

[4.DEF] 2. V-SIZE 3. SUBTITLE

(1) (2) (3) (4) (5) (6) (7)

Screen size

Picture size 100%

(8)

Receive the crosshatch signal. Select 4.DEF. Select <2.V-SIZE> and set the initial setting value. Adjust <2.V-SIZE> and adjust the vertical screen size is in the table given below. Press the [OK] key and memorize the set value. Select <3.SUBTITLE> and adjust the vertical picture size of screen bottom. Input the NTSC VIDEO signal (60Hz) from the EXT terminal, and adjust that vertical screen size is in the range of the table given below. Press the [OK] key and memorize the set value.

ASPECT MODE SCREEN TOP SCREEN BOTTOM

PANORAMIC

14 : 9 ZOOM

16 : 9 ZOOM

SUB TITLE

FULL

REGULAR

87% 87%

80% 80%

73% 73%

70% 83%

92% 92%

92% 92%

1-30 (No.52116)