Sony CA-755 Maintenance Manual page 33

2-3-3. Y/SKIN DC Balance Adjustment
To be extended : MD-117 board
: Oscilloscope (LIMITER → OFF)
Equipment
Test point : TP2/MD-117 board
GND : E1/MD-117 board
Adjustment points : 1RV8 (DC BAL)/MD-117 board
1RV11 (SKIN DC BAL)/
MD-117 board
Adjustment procedure :
Adjust 1RV8 and 1RV11 alternately until the V SYNC
portions are flat.
CA-755/755P
2-3-4. R-Y Video Level Adjustment
Preparations :
. S1/MD-117 board → ON
. S2/MD-117 board → OFF
To be extended
Equipment
Test point
GND
Adjustment point
Specifications
V rate
2-3. MD-117 Board Adjustment
2-3-3. Y/SKIN DC Balance Adjustment
2-3-4. R-Y Video Level Adjustment
: MD-117 board
: Oscilloscope
: TP6/MD-117 board
: E1/MD-117 board
: 1RV2 (R-Y LEVEL)/MD-117 board
: A : B = 3 : 4
(Tolerance of 1% or better)
2-7 (E)