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3-3. Video Signal System Adjustment
3-3-33. STAIR CASE Adjustment
Rank:
C
Note:
This adjustment is for temporary
adjustment when repairing the
STAIR CASE block. In the system
set up, the readjustment is required to
match the characteristic of waveform
monitor.
Equipment:
Oscilloscope
To be extended:
VA-156 board
Test point:
pin C66 (GND: pin D66)/
Adjusting point:
1RV1102 (STAIR CASE POSITION)/
1RV1101 (STAIR CASE LEVEL)/
A = 10.0 ±0.5 V p-p (1RV1101)
Specification:
B = 0 ±0.5 V dc (1RV1102)
A
3-22
extension board
VA-156 board
VA-156 board
TP26
TP27
B
GND
CV341
H BLK
RV1892
E7
RV1891
RV1781
CP1891
RV1967
RV1966
RV1964
-
VA
(PANEL SIDE)
E9
S221
RV1604
CV651 CV125
-
B
Y SEL
CV931
CV1603
RV670
RV931
RV1603
RV145
CV1602
CV521
CV1
RV125
CV841
RV221
RV533
TP25
RV841
RV20
RV270
E6
CV1011
RV361
RV280 RV1011
TP7
RV360
LV1011
RV272
CV221
RV271
RV2037
RV2031
RV2032
RV651
S2032
TP13
CB MODE
TP30
RV2036
RV530
RV2035
RV660
TP31
RV2034
TP14
TP12
S1891
TP32
E8
S2301
RV662
RV2033
SKIN SIG
RV1782
E3
RV1783
S1102
SEQ ON
S1101
TP16
SEQ
RV1961
RV1962
RV1102
RV1965
TP29
RV1963
S1501
S1962
S1892
(PAL)
S1961
RV761 RV1101
RV1303
-
5
+12
12
+5
V BLANKING (NTSC)
NOTCH (PAL)
WFM1
STAIR
SC
H
STEP
PHASE
PHASE
LEVEL
REMOTE
STEP COARSE
GEN
POSITION
LOCK
LOCAL
FINE
FINE
19H 20H 21H
LEVEL
VA-156 BOARD (COMPONENT SIDE)
S126
S125
-
S1
R
Y
ON/OFF
SEL Y SEL
TEST
TP34
RV1
E10
TP1
RV136
RV341
RV135
RV12
RV10
TP5
TP2
RV11
RV13
RV137
E1
RV342
TP4
RV521
RV343
RV350
E2
TP8
RV344
TP9
RV351
RV531
RV352
RV532
RV353
RV1506
RV1501
RV661
RV1503
RV1302
RV1502
S1361
RV1301
RV1504
TP22
RV1505
S1362
RV1361
CV1501
S/U
E4
TP23
TP20
TP19
LV1601
E5
LV1361
TP18
TP21
TP24
RV1304
RV1601
RV1602
RV1363
RV1362
RV1364
BLACK
BALANCE
BURST
VBS
OFF ON
Y
PHASE
CHROMA
LEVEL
I
O (NTSC)
V
U (PAL)
CCU-700A
CCU-700AP
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