B-Y Out Level Adjustment - Sony CCU-590 Maintenance Manual

4-5-6. B-Y OUT Level Adjustment

Adjustment category: A
Measuring instrument: Oscilloscope
Extended board: DM-140 board
Preparation:
. S301 (C 2nd AGC)/DM-140 board → "ON"
Measurement point: TP801 (GND: E1)/DM-140
board
1RV802 (B-Y LEVEL)/DM-
Adjustment point:
140 board
A = 700 ± 10 mV p-p
Specification:
CCU-590/P/V1(E)
A
4-5-7. R-Y DEMOD Carrier Balance
Adjustment
Adjustment category:
B
Measuring instrument: Oscilloscope
Extended board:
DM-140 board
Measurement point: TP902 (GND: E301)/DM-140
board
Adjustment point: 1RV901 (R-Y CAR BAL)/
DM-140 board
Specification:
Maximize the absolute value of
negative DC voltage.
GND
(Negative voltage) _
H
TP601
RV601
G
RV701
TP101
E101
F
TP603 TP602
S101
RV161
RV602
RV603
TP102
E
TP1
D
S1
C
B
A
RV902
RV702 RV802
1 2
DM-140 BOARD (SIDE A)
Maximum
CN902
RV803
RV903
TP902
RV901
RV801
S301 TP301
E301
TP803 TP802
RV301
RV804
RV805
TP302
TP501
LV501
TP502
RV502
RV501
RV503
TP503
TP505
RV504
TP504
TP901
TP701 TP801
4
E1
3
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