JVC AV-21KT1BPFB
Service Manual

Item RGB MODE HORIZONTAL SHIFT adjustment

Measuring instrument Signal generator Remote control unit

Test point

Adjustment part RGBH

Description (1) Input R/G/B circle pattern signal via video input terminal. (2) Press [AV] key on the remote control unit, force the TV to RGB mode. (3) Enter the SERVICE MENU. (4) Select RGBH with the [ / ] key. (5) Adjust RGBH with the [ / ] key until the circle pattern is horizontally centered.(A=B) (6) Check and readjust RGBH item if the adjustment becomes improper after some other geometric adjustments are done.

A

B

VERTICAL SIZE Signal OFFSET generator adjustment (60Hz) Remote control unit
Very close

VSOF

(1) Receive a NTSC-M cross-hatch pattern of vertical frequency 60Hz. (2) Enter SERVICE MENU. (3) Select VSOF with the [ / ] key. (4) Adjust VSOF with the [ / ] key until the horizontal black lines on both the upper and lower part of the pattern become very close to the opper anr lower horizontal sides of picture size and nearly about to disappear. (5) Check and readjust VSOF item if the adjustment bocomes improper after some other geometric adjustments are done.

Screen size

Picture size 100%

Very close

VERTICAL POSITION OFFSET adjustment (60Hz)

Signal generator Remote control unit

VPOF

C

(1) Receive a NTSC-M circle pattern of vertical frequency 60Hz. (2) Enter the SERVICE MENU. (3) Select VPOF with the [ / ] key. (4) Adjust VPOF with the [ / ] key until the picture is vertically centered.(C=D) (5) Check and readjust vertical position item if the adjustment becomes improper after some other geometric adjustments are done.

D

(No.52134)1-17