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KV-XA29M31/XA29M50/ XA29M61/XA34M31
RM-954
4-4. G2 (SCREEN) AND WHITE BALANCE ADJUSTMENTS
1. 1) 2) 3) G2 (SCREEN) ADJUSTMENT Set the PICTURE to normal. Put to VIDEO input mode without signals. Connect R, G and B of the C6 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 5-1: 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 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.
Cathode setting voltage: 180 V ± 2 (VDC)...29" 175 V ± 2 (VDC)...34"
0V
White second from the right
Black
� 34 �
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