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3-8-7. INCOM 2 Demod. Adjustment
Rank:
C
Note:
Perform the adjustment only when
replacing 1T501/AT-88 board.
Equipment:
Oscilloscope, Audio generator
To be extended:
AT-88 board
Preparation
• MIC 2 (ON/OFF) switch/BVP rear panel → "ON"
• Extend the AU-177 board (BVP camera) with extension
board EX-439.
Test point:
TP16 (GND: E1)/AT-88 board
Adjustment Procedure
1. Feed the 1 kHz, 220 mV p-p sine-wave to pin 48 (X)
and pin 49 (GND)/extension board (BVP camera).
...Fig-1 (Refer to 3-1-4. Audio connection.)
2. Adjust a white core of 1T501/AT-88 board slowly so
that the DC level at TP16 is 1.24 ±0.02 V dc.
GND
3. Set the input range of oscilloscope to AC mode, and
adjust a blue core of 1T501/AT-88 board so that the
sine-wave is minimum.
4. Repeat procedure 2.
CCU-700 A
CCU-700AP
REMOTE MODE-1
1.24 ± 0.01 V dc
E1000
TP1001
S1001
MODE1
MODE2
S1002
minimum
-
5
-
12
AT
(PANEL SIDE)
3-8. TRIAX Interface System Adjustment
TTL
CONTACT
S2821
S2822
S1006 S1007
POWER
POWER
TTL
S2792
S2791
REMOTE MODE-2
POWER POWER
RV2432
TP22
S2081
S2061
TP23
S2082 S2083
E2
LV1 LV21
TP1
TP2
RV81
LV81
TP21
RV61
LV61
E20
RV41
LV41
TP45
E1
TP44
TP42
TP46
E11
S2491
RV2341
ENG SELECT
RV2342
S1005
S1004
S2301 S2062
S1003
CCU PAINT
+12
INCOM
+5
MIC LEVEL
SELECT
PGM
REAR
ENG
NORM
NORM
MIX
INCOM MIC
MIN
MIN
-
-
CH
1
CH
2 CLEAR
DYNAMIC
ENG
PROD
2W
CARBON
SIDE
LEVEL
PRIVATE
TONE
AT-88 BOARD (COMPONENT SIDE)
G TALLY
Y TALLY
RV2431
RV2310
TP47
RV2382
E12
TP48
S2341
RV2301
RV2302
TP15
TP13
TP10
TP17
RV501
TP9
TP12
TP7
S201
RV401
RV101
RV301
TP5
T201
T501
S301
T301
TP6
T401
RV201
TP4
TP16
TP11 TP8
TP14
LV101
TP3
S2241
PROD SELECT
TP43
RV2451
RV2452
RV2491
TP40
RV2211
E10
RV2212
RV2241
PROD
RTS
CANCEL
RTS
2W
CANCEL
CANCEL
2W
2W
CANCEL
LEVEL
3-43
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