you are doing great job guys.....my father ask me to find out the schematics of Sony KV25R1D to sort out the problem ..(he was electrical technician, and excperianced with TV and simillar stuff). finally he found the cause and change all necessary parts....now he has got working old dog..and is very happy!!... thank you all.. NB..he also saved the repair cost.
Item as described, very well detailed manual with complete schematics. I've received the download information shortly after payment, very good support.
Good product and very helpfull to repair. Many thanks.
Text excerpt from page 17 (click to view)
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.
