Y Cable Compensation System Adjustment; Sync Sep Adjustment; Black Pulse Width Adjustment - Sony CCU-TX7 Service Manual

4-3. Y Cable Compensation System
Adjustment

4-3-1. SYNC SEP Adjustment

Equipment : Oscilloscope
To be extended : YD-26 board
Preparation :
. In case of RCP-TX7
Set IRIS AUTO button to "OFF", and close the lens iris by
IRIS control knob.
. In case of COU-TX7
Set IRIS AUTO/MANUAL switch to "MANUAL", and
close the lens iris by IRIS control knob.
Test point : TP4 (GND: E2)/YD-26 board
Adjusting point : 1LV1 (Y RF TUNE)/YD-26 board
Specification : Level "A" = maximum level
H
E1
RV1
Y AGC CONT
YD-26
Y 2'nd AGC
S3
E4
TP1
E3
CCU-TX7 (E)/V1
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

4-3-2. BLACK Pulse Width Adjustment

Equipment
To be extended : YD-26 board
Test point
Adjusting point : 1RV2 (BLACK S/H)/YD-26 board
Specification
H
T
E5
TP10
TP11
RV8
Y LEVEL
RV9
RV6
E6
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
: TP5 (GND: E2)/YD-26 board
: T = 1.7 ± 0.1 µs
50%
4-13