Y Output Level Adjustment; Chroma Cable Compensation System Adjustment; 45 Mhz Carrier Level Adjustment - Sony CCU-TX7 Service Manual

4-3-12. Y Output Level Adjustment

Equipment : Oscilloscope
To be extended : YD-26 board
Preparation :
. S3 (Y 2nd AGC)/YD-26 board → → → → → "ON"
Test point : TP11 (GND: E6)/YD-26 board
Adjusting point : 1RV9 (Y LEVEL)/YD-26 board
: A = 700 ± 7 mV p-p
Specification
E1
RV1
Y AGC CONT
YD-26
Y 2'nd AGC
S3
E4
TP1
E3
4-18
A
TP26
SAMPL GATE
RV3
SAMPL S/H
RV4
E2
TP2 Y OFFSET ADJ
TP5
TP8
TP4 TP7
Y RF TUNE
VCO DC SET
TP6
RV2 RV5
TP9
LV1
BLACK S/H SYNC S/H
TP17
TP3
RV12
S4
C 2'nd AGC
B-Y LEVEL
E7
B-Y CARR BAL
RV11
TP14
TP13
RV10
C AGC CONT
RV13 RV14
OFFSET ADJ PLL SET
S2
CABLE LENGTH
S1
4-4. CHROMA Cable Compensation
System Adjustment

4-4-1. 45 MHz Carrier Level Adjustment

Equipment
To be extended : YD-26 board
Test point
Adjusting point : 1RV15 (C CARR LEVEL)/
Specification
E5
TP10
TP11
RV8
Y LEVEL
RV9
RV6
E6
FL3
TP12 RV17
R-Y LEVEL
E8
E9
R-Y CARR BAL TP19
RV16
TP16
TP15
RV18
90° SET
RV15
C CAR LEV
E16
TP21 TP20
YD-26 Board
(A SIDE)
: Oscilloscope
: TP16 (GND: E8)/YD-26 board
YD-26 board
: A = 400 ± 20 mV p-p
(BW LIMIT/Oscilloscope → "OFF" )
A
CCU-TX7 (E)/V1