LVDS CABLE FAULTS – DISTORTED PICTURE – WHITE SCREEN - SONY KLV-32M – KLV-26H

COLOR DISTORTION

    Illustrates a loss of signal on CN5801/pins 5 or 6 (KLV-26HG2), and CN4501/ pins 5 or 6 (KLV-32M1). These two lines carry strictly RGBinformation (no HS or VS sync information). Therefore, a loss of signal on these lines causes a loss of a primary color. In this case it is a loss of primary blue and/or green, causing the reddish coloring of the picture.

   The unit will power up normally, but only a light white raster will be displayed and audio will be present. The unit remains ON and does not trigger a protection mode shutdown. Confirm the 12V on CN5801/pins 1 & 2 on the KLV-26HG2 model, and the 5V on CN4501/pins 26 – 30 on the KLV-32M1 model.

   The LVDS cable transports video and sync information from the B-board to the Logic board on the KLV-26HG2, and between BL-board and the Logic board on the KLV-32M1. The text associated with each picture describes the distortion and the possible cause.
Figures illustrate the video distortions caused by an open circuit on the LVDS cable, which carry video RGB video information.

   Illustrates a loss of signal on CN5801/pins 17 or 18 (KLV-26HG2), and CN4501/ pins 17 or 18 (KLV-32M1). These two lines also only carry RGB information (no HS or VS sync information). Therefore, a loss of signal on these lines causes a loss of a primary colour. In addition, a defect on these lines also affects the luminance. The affect is a black and-white picture with a polarizations or blooming aspect. In this case it is a loss of primary blue and/or green, causing the reddish colouring of the picture.

SYNC DISTORTION

CLICK ON THE PICTURES TO MAGNIFY

To all the above shown faults, re-seat the LVDS cable first and check.  If it doees not help you, replace the LVDS cable with a new one.

LVDS CABLE