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3-3. Video Signal System Adjustment
3-3-1. Sub-carrier Frequency Check
Rank:
C
Note:
Check to see that the signal is not
input to the REFERENCE input
connector of the rear panel on the
CCU.
Before adjustment, warm up the
frequency counter more than 4 hours.
Equipment:
Digital voltmeter, Oscilloscope,
Frequency counter
To be extended:
VA-156 board
Adjustment Procedure
1. Test point:
IC1892-pin 14 (GND: E7)/VA-156
board
Adjusting point: 1RV1891 (LOCAL SC)/VA-156
board
+2.5 ±0.1 V dc
Specification:
2. Connect the oscilloscope and the frequency counter as
follows.
3. Test point:
TP29 (GND: E7)/VA-156 board
Adjusting point: Potentiometer on the top of
1CP1891
[For NTSC] 3,579, 545 ±2 Hz
Specification:
[For PAL] 4,433,619 ±2 Hz
CCU-700A
CCU-700AP
3-3-2. SC Phase Adjustment
Rank:
B
Equipment:
Vectorscope
To be extended:
VA-156 board
Preparation
• Gen-lock CCU-700A/700AP and Video signal generator.
• BARS button/MSU-700 → "ON"
Test point:
VBS 1 OUT connector/CCU rear panel
Adjustment Procedure
Observe the vectorscope screen and adjust 1RV1965 (SC
PHASE OFFSET)/VA-156 board so that the SC phase
variable range (due to 1RV1961 (SC FINE)/VA-156
board) is 100 ±2 °.
TP26
E9
RV1604
CV651 CV125
CV931
TP27
RV670
RV931
RV145
CV521
CV1
CV841
RV221
RV533
RV841
RV20
CV341
CV1011
RV361
RV280 RV1011
RV360
LV1011
CV221
RV2037
RV2031
RV2032
S2032
CB MODE
TP30
RV2036
RV2035
TP31
H BLK
RV2034
S1891
TP32
E8
RV1892
S2301
RV2033
E7
SKIN SIG
RV1782
RV1783
RV1891
S1102
SEQ ON
S1101
RV1781
SEQ
CP1891
RV1961
RV1962
RV1965
TP29
RV1963
RV1967
S1962
S1892
RV1966
RV1964
S1961
RV761 RV1101
-
5
+12
-
12
+5
V BLANKING (NTSC)
VA
SC
H
PHASE
PHASE
REMOTE
STEP COARSE
LOCAL
FINE
FINE
19H 20H 21H
(PANEL SIDE)
VA-156 BOARD (COMPONENT SIDE)
3-3. Video Signal System Adjustment
S126
S125
S221
-
R
Y
S1
ON/OFF
-
SEL Y SEL
B
Y SEL
TEST
CV1603
RV1603
TP34
RV1
CV1602
RV125
TP1
TP25
RV136
RV341
RV270
RV135
RV12
E6
RV10
TP7
TP5
TP2
RV11
RV13
RV272
RV137
E1
RV342
TP4
RV271
RV651
RV521
RV343
TP13
RV350
E2
RV530
TP8
RV660
RV344
TP9
RV351
TP14
RV531
TP12
RV352
RV532
RV353
RV1506
RV662
RV1501
RV661
RV1503
RV1302
RV1502
E3
S1361
RV1301
RV1504
TP22
RV1505
S1362
RV1361
CV1501
S/U
TP16
E4
TP20
TP19
LV1601
RV1102
LV1361
TP18
S1501
TP21
(PAL)
RV1304
RV1601
RV1602
RV1303
RV1363
RV1362
RV1364
BLACK
NOTCH (PAL)
BALANCE
WFM1
STAIR
BURST
VBS
STEP
LEVEL
OFF ON
Y
GEN
POSITION
CHROMA
PHASE
LOCK
LEVEL
I
O (NTSC)
LEVEL
V
U (PAL)
E10
TP23
E5
TP24
3-5
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