Return Video Cable Compensation System Adjustment; Return Video Deviation Adjustment - Sony CCU-TX7 Service Manual

4-5. RETURN VIDEO Cable Compensation
System Adjustment
4-5-1. Return Video Carrier Frequency
Adjustment
Equipment : Spectrum analyzer
To be extended : CT-181 board
Preparation :
. Input 10 STEP signal (sub-carrier : OFF) of video signal
generator to RETURN-1 connector (75 Z termination, 1.0
V p-p) on the CCU-TX7/TX7P rear panel.
Test point : TP21 (GND: E12)/CT-181 board
Adjusting point : 1CV1 (RET FREQ)/CT-181 board
: 69.000 ± 0.005 MHz
Specification
SYNC
69.0MHz
CENT FREQ: 69.0MHz
FFEQ SPAN: 5.0MHz
TP2006
CT-181
S2011
R TALLY
R TALLY
CONTACT
CONTACT
TP1000
POWER
POWER
DC24V
DC24V S2013
E1000
TTL
TTL
R TALLY
G TALLY
CONTACT
CONTACT
S2012
POWER
G TALLY
POWER
DC24V
DC24V
S2014
TTL
G TALLY
TTL
MIC GAIN
MIC 1 GAIN
SW1000
NORM
CH-1
MIN
MAX
SW1001
MIC 2 GAIN
NORM CH-2
S1001
MIN
MAX
PANEL
SELECT
PANEL
REMOTE
LOCAL
CONTROL MODE
NORM
NORMAL
CONT MODE
SLAVE
SLAVE
S1002
CCU-TX7 (E)/V1
E1001
RET FREQ
CV1
E12
RF AGC DLY
RV22
PROMPT FREQ
RV23
PROMPT TUNE
PROMPT LEVEL
LV3
E13
TP22
S2002
PROMPT CN7
RX TX
S1004
CN8
RS232C-2
PROMPT RF RX
IF BOARD
TP1001
E16
TP2003 TP2002 TP2004 TP2001
TP2005

4-5-2. Return Video Deviation Adjustment

Equipment : Spectrum analyzer
To be extended : CT-181 board
Preparation :
. Input 10 STEP signal (sub-carrier : OFF) of video signal
generator to RETURN-1 connector (75 Z termination, 1.0
V p-p) on the CCU-TX7/TX7P rear panel.
Test point : TP21 (GND: E12)/CT-181 board
Adjusting point : 1RV20 (RET DEV)/CT-181 board
: T = 2.000 ± 0.005 MHz
Specification
T
69.0MHz
CENT FREQ: 69.0MHz
FFEQ SPAN: 5.0MHz
Note : Performe the adjustment of 4-5-1. "Return Video
Carrier Frequency Adjustment" when the SYNC
portion is moved during the adjustment.
E11
PROMPT DEV
RV21
CN2
PROMPT RF TX RET RF
CN3
PROMPT RF
TP2000
E2000
CT-181 Board
(A SIDE)
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