Video Signal System Adjustment; Sub-Carrier Frequency Check; Cam H Phase Adjustment - Sony CCU-TX7 Service Manual

4-2. Video Signal System Adjustment

4-2-1. Sub-carrier Frequency Check

Note : Check that the GEN LOCK IN connector of CCU-
TX7/TX7P rear panel is no signal.
Before adjustment, warm up the frequency counter
more than 30 minutes.
Equipment : Oscilloscope, Frequency counter
To be extended : ES-20 board
Adjustment Procedure :
1. Connect the oscilloscope and the frequency counter as
follows.
: TP1 (GND: E1) /ES-20 board
2. Test point
Adjusting point : 1RV4 (SC FREQ.)/ES-20 board
: [For NTSC] 3,579,545 ± 2 Hz
Specification
[For PAL] 4,433,619 ± 2 Hz
SYNC WIDTH
RV3
ES-20
RV2
PHASE
RV7
H PHASE
H
SYNC PHASE
RV6
SC SC PHASE
TP1
RV4
0
SC FREQUENCY
180°
RV5
OUT PUT 1
SC-H PHASE
R/G/B
Y/R-Y/B-Y
E1
Y/C
OUT PUT 2
G MAT BAL2
R/G/B
S1 RV506
Y/R-Y/B-Y
Y/C
TP501
RV508
RV507
G MAT BAL1
G LEVEL
RV511
R DC BAL
RV510
R LEVEL
RV514
B DC BAL
RV513
B LEVEL
CCU-TX7 (E)/V1
Y LEVEL (VBS)
SYNC LEVEL (VBS)
RV803
RV800 RV801
SYNC LEVEL(COMP)
Y SETUP LEVEL
(NTSC ONLY)
B-Y LEVEL
B WHT BAL R WHT BAL
RV505 RV500
TP502
R-Y BLK BAL
RV501
R MAT BAL
RV509
TP503 R-Y GAIN ADJ
RV502
B MAT BAL
RV512 RV1000
RV504 RV503
B-Y GAIN ADJ B-Y BLK BAL

4-2-2. CAM H Phase Adjustment

Equipment
To be extended : ES-20 board
Preparation :
. S800 (R/G/B, Y/R-Y/B-Y, Y/C)/ES-20 board
Test point
Adjusting point : 1RV1 (CAM H PHASE) /ES-20 board
Specification
50%
50%
T
RV804
CHROMA LEVEL
RV802 RV810
E3
Y LEVEL(COMP)
RV812
TP7
TP5
POSITION TP4
TP2
TP3
LEVEL
ES-20 Board
(A SIDE)
: Oscilloscope (CHOP mode)
→ "Y/R-Y/B-Y" (Center position)
: CH1 pin 94/extension board
CH2 pin 47/extension board
: T = 0 ± 0.05 µs
CH1
CH2
4-3