SONY KVXS29N90
Service Manual

KV-XS29N90/XS29N93
RM-914

3-4. G2 (SCREEN) AND WHITE BALANCE ADJUSTMENTS
1. G2 (SCREEN) ADJUSTMENT 1) Set the PICTURE to normal. 2) Put to VIDEO input mode without signals. 3) Connect R, G and B of the C board cathode to the oscilloscope. 4) Adjust BRIGHTNESS to obtain the cathode voltage to the value below. 5) Adjust G2 (screen) on the FBT until picture shows the point before cut off.

2. WHITE BALANCE ADJUSTMENT 1) Set to Service Mode (Refer Section 4-1: ADJUSTMENTS WITH COMMANDER). 2) Input white raster signal. 3) Set the PICTURE to minimum. 4) Select GCT (WHB 4) and BCT (WHB 5) with [1] and [4], and adjust the level with [3] and [6] for the best white balance. 5) Set the PICTURE to maximum. 6) Select GDR (WHB 1) and BDR (WHB 2) with [1] and [4], and adjust the level with [3] and [6] for the best white balance. 7) Write into the memory by pressing [MUTING] then [0]. 3. SUB BRIGHT ADJUSTMENT

Cathode setting voltage: 180V ±2(VDC)...29"

1) Set to service mode. 2) Input a staircase signal of black to white from the pattern generator. 3) BRIGHTNESS .... 50%. PICTURE ............ MINIMUM 4) Select SBR (WHB7) with [1] and [4], and adjust SBR (WHB7) level with [3] and [6] so that the second stripe from the right is dimly lit.

0V

White second from the right

Black

� 33 �