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CCU-590/P/V1(E)
4-38
CN902
RV100
RV101
RV102
RV200
RV201
RV202
RV203
RV204
S1
S100
S101
S102
S103
S104
S105
S106
S107
S108
S2
S200
S201
S202
S203
S204
S205
S206
S207
S3
S4
TP100
TP101
TP102
TP200
TP201
TP202
TP203
TP204
TP205
TP206
TP207
TP208
TP209
TP210
E1
E2
E3
IC105
A
B
C
D
E
F
G
H
J
K
1
2
3
4
5
AU-295 BOARD (A SIDE)
4-9. Intercom System Adjustment
4-9-1. INCOM (T) Level Set Adjustment
Adjustment category:
C
Measuring instruments:
Oscilloscope, Audio generator
Preparation:
.
S5/SW-1189 board
→
“ECM”
.
MIC switch/CCU front panel
→
“MIC ON”
Measurement point:
TP202 (GND: E1)/AU-295 board
Adjustment point:
1
RV202 (TALK LEV)/AU-295
board
Adjustment procedure:
1.
Connect the audio generator to the INCOM connector
on the CCU front panel as shown below.
2.
Input 1 kHz/220 mV p-p sine wave from the audio
generator.
3.
Adjust
1
RV202 (TALK LEV) on the AU-295 board
so that TP202 signal level becomes 200
±
10 mV p-p.
4-9-2. SIDE TONE Adjustment
Adjustment category:
C
Measuring instruments:
Oscilloscope, Audio generator
Extended board:
AU-295 board
Preparation:
.
S5/SW-1189 board
→
“ECM”
.
MIC switch/CCU front panel
→
“MIC ON”
.
INCOM level adjustment knob/CCU front panel
→
Maximum
Measurement point:
TP202 (GND: E1)/AU-295 board
Adjustment point:
1
RV102 (SIDE TONE)/AU-
295 board
Adjustment procedure:
1.
Connect the audio generator to the INCOM connector
on the CCU front panel as shown below.
2.
Adjust the audio generator output level so that 1 kHz/
200 mV sine wave appears at TP202 (GND: E1) on the
AU-295 board.
3.
Adjust again
1
RV102 (SIDE TONE) on the AU-295
board so that TP206 level becomes 330
±
60 mV p-p.
n
The value above is determined for maintenance.
Adjust the level as required by customers for actual
operation.
5
4
1
2
3
GND
Audio generator
INCOM connector
more than
47
u
F/16 V
600
Z
_
+
200
±
10 mV p-p
5
4
1
2
3
GND
Audio generator
INCOM connector
more than
47
u
F/16 V
600
Z
_
+