1-9. Intercom System Adjustment
1-9-3. FP PGM Level Adjustment
Rank:C
Equipment:Spectrum analyzer, Oscilloscope,
Audio generator
To be extended:AU-231 board
Preparation:
. INCOM switch/CCU front panel ? OENG�
Test point:pin 37 (GND: pin 40)/
extension board (extending AU-231)
Adjustment point:1RV503 (PGM LEVEL)/1 RV100S1
S4
AU-231 board
S2
Adjustment Procedures:S3
2
1. (For 4W intercom system)D
ABC
Feed the 400Hz sine wave signal from the audio
generator to pin 66 (X), pin 65 (Y) and pin 67 (GND)/AU-236 BOARD (A SIDE)
extension board (extending AU-231).
.Fig-2 (Refer to 1-1-4. Audio connection.)
(For 2W intercom system)
Feed the 400 Hz sine wave signal from the audio
generator to pin 66 (X), pin 67 (GND)/extension board
(extending AU-231).E2
N
CN1
.Fig-1 (Refer to 1-1-4. Audio connection.)S451
S701S601TP451
2. Adjust the output of audio generator so that the level atS452M
TP452
TP702 (GND: E3)/AU-231 board is 200 mV p-p.
3. Adjust the INCOM control/CCU front panel so that the
L
signal level at pin 37 (GND: 40)/extension board is 2.2
V p-p.S901
4. Feed the 400 Hz sine wave signal from the audioKS501
RV702RV602
generator to pin 57 (X), pin 56 (Y) and pin 55 (GND)/RV502
JTP702TP602
extension board (extending AU-231).TP502
TP501
.Fig-2 (Refer to 1-1-4. Audio connection.)
H
5. Adjust the output of audio generator so that the level at
TP451 (GND: E1)/AU-231 board is 200 mV p-p.
E3
6. INCOM switch/CCU front panel ? OPGM�GTP601
TP701RV151
7. Adjust 1RV503 (PGM LEVEL)/AU-231 board so thatTP152 TP252TP202
S251 S201
the signal level at pin 37 (GND: pin 40)/extensionFRV101TP151
RV251RV201
board is 2.2 Vp-p.TP102T151
LV21TP21
E
TP251 TP201
LV1TP1T251T201
LV101
D
LV61
2.2 V p-p
RV61TP101
TP51
CLV41
RV41
TP31
B
E1
A
123
RV503RV701
456
RV501RV601
AU-231 BOARD (A SIDE)
CCU-550A/550AP MMP21-41 (E) |