Prompt Video Cable Compensation System Adjustment; Tx Prompt Video Modulation Adjustment - Sony CCU-590 Maintenance Manual

4-8. PROMPT VIDEO Cable
Compensation System Adjustment
4-8-1. TX PROMPT VIDEO Modulation
Adjustment
Adjustment category: B
Note: Use a TRIAX cable (300 m
maximum) for this adjustment.
Measuring instruments: Oscilloscope, Video signal
generator
Extended board:
TR-133B board
Preparation:
. Input 10 STEP signal (chroma signal: OFF) from the
video signal generator to the PROMPTER terminal
(CCU rear panel).
. S2 (TX ← REM → RX) /TR-133B board (CCU) →
"TX"
. S1 (Cable Length) /DM-140 board (CCU) → "1" (330)
. Set S301 on the DM-139B board of CA-590/590P to
"RX"
Measurement point:
TP801 (GND: E801)/TR-133B
board
1RV801 (PROMPT DEV)/TR-
Adjustment point:
133B board
A = 25 ± 3 %
Specification:
Adjustment procedure:
. Adjust 1RV801 so that the level "A" meets the specifi-
cation, when the level "B" is set to 100 % with the
oscilloscope VAR adjustment knob.
Note:
Set the switch below after the adjustment is completed.
. S1 (Cable Length)/DM-140 board (CCU) → "F"
(AUTO)
CCU-590/P/V1(E)
B = 100 %
A = 25 ±3 %
CN902
E1
G
F
TP202
RV801
RV201
RV601
E
TP801
LV602
E801
LV901
LV601
LV201
RV901
D
TP201
LV902
C
RV701
RV902
TP901
TP1 TP21
TP41
B
E701
TP701
A
RV41
S1
E101
1 2
TR-133B BOARD (SIDE A)
S2
S363
E300
TP402 TP302
RV401 RV301
TP401 TP301
LV402
LV302
LV401 LV301
E100
TP101
E102
LV101
RV101
3 4
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