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3-8-13. CHU DATA Demod. Adjustment
Rank:
C
Note:
The adjustment for BVP-700/700P
camera must be completed.
Perform the adjustment only when
replacing 1LV101 (5.6 MHz TUNE)/
AT-88 board.
Equipment:
Oscilloscope
To be extended:
AT-88 board
Test point:
TP6 (GND: E2)/AT-88 board
Adjusting point:
1LV101 (5.6 MHz TUNE)/
–0.20 ±0.02 V dc
Specification:
GND
E1000
TP22
TP1001
TP23
S1001
E2
MODE1
MODE2
S1002
TP21
E20
TP44
TP42
E11
S2491
ENG SELECT
S1005
S1004
S2301 S2062
S1003
CCU PAINT
-
5
+12
-
12
+5
MIC LEVEL
AT
REAR
NORM
NORM
INCOM MIC
MIN
MIN
-
-
CH
1
CH
2 CLEAR
DYNAMIC
ENG
CARBON
PRIVATE
(PANEL SIDE)
AT-88 BOARD (COMPONENT SIDE)
CCU-700 A
CCU-700AP
AT-88 board
0.20 ± 0.02 V
RV2310
TP47
S2081
RV2382
TP48
S2061
S2082 S2083
S2341
RV2301
RV2302
TP15
TP13
TP17
LV1 LV21
RV501
TP12
TP1
TP7
RV401
RV101
TP2
RV301
RV81
TP5
LV81
T501
S301
TP6
T401
RV201
RV61
LV61
TP4
TP16
TP11 TP8
TP14
RV41
LV41
LV101
TP3
TP45
E1
S2241
PROD SELECT
TP46
RV2451
RV2341
RV2452
RV2342
RV2491
TP40
RV2211
RV2212
RV2241
INCOM
SELECT
PGM
ENG
PROD
MIX
RTS
CANCEL
PROD
2W
RTS
2W
SIDE
LEVEL
CANCEL
CANCEL
TONE
2W
2W
CANCEL
LEVEL
3-8-14. CHU TONE Adjustment
Rank:
Equipment:
To be extended:
Test point:
Adjusting point:
Adjustment procedure
1. 1RV101 (TONE TUNE)/
2. Turn 1RV101 (TONE TUNE)/AT-88 board slowly
clockwise 2 until the sine-wave waveform just
appears.
Measure the DC voltage "a".
3. Turn 1RV101 (TONE TUNE)/AT-88 board slowly
counterclockwise 3 until the sine-wave waveform just
appears.
Measure the DC voltage "b".
4. Adjust 1RV101 (TONE TUNE)/AT-88 board so that
DC level is half way between position "a" and
"b".
Fig-3
...
E12
TP10
TP9
S201
T201
T301
TP43
E10
3-8. TRIAX Interface System Adjustment
C
Oscilloscope (DC mode)
AT-88 board
TP7 (GND: E2)/AT-88 board
1RV101 (TONE TUNE)/
AT-88 board
AT-88 board → Mechanical center
Fig-1
...
Fig-2
...
Position "a"
(Fig-1)
Mechanical centert
Position "a"
Position "b"
(Fig-2)
Position "a"
A = B
A
center
B
Position "b"
(Fig-3)
3-47
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