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3-11. RTS Intercom System System Adjustment
3-11. RTS Intercom System Adjustment
3-11-1. ENG RTS CANCEL Adjustment
n
• The following adjustment is necessary when the inter-
com is RTS system. Also, this information is only for
repair purpose.
Rank:
C
Equipment:
Oscilloscope, Audio generator
To be extended:
AT-88 board
Preparation
• MIC switch/CCU front panel → "CARBON"
• INCOM (PROD/PRIV/ENG) switch/
• S2491 (INCOM 1 SELECT)/AT-88 board → "RTS"
• Connect between pin D71 and pin B72/extension board
with 200 Z resistor.
Test point:
TP46 (GND: E11)/AT-88 board
Adjustment Procedure
1. Feed the 1 kHz, 220 mV p-p sine-wave to INCOM
connector (CCU-700A/700AP).
2. Adjust 1RV2491 (ENG RTS CANCEL)/AT-88 board
so that the audio level at TP46 (GND: E11)/AT-88
board is minimum.
3-52
AT-88 board panel → "ENG"
Less than
20 mV p-p
3-11-2. PROD RTS CANCEL Adjustment
n
• The following adjustment is necessary when the inter-
com is RTS system. Also, this information is only for
repair purpose.
Rank:
C
Equipment:
Oscilloscope, Audio generator
To be extended:
AT-88 board
Preparation
• MIC switch/CCU front panel → "CARBON"
• INCOM (PROD/PRIV/ENG) switch/
• S2241 (INCOM 2 SELECT)/AT-88 board → "RTS"
• Connect pin B70 and pin D70/
extension board with 200 Z resistor.
Test point:
TP43 (GND: E10)/AT-88 board
Adjustment Procedure
1. Feed the 1 kHz, 220 mV p-p sine-wave to INCOM
connector (CCU-700A/700AP).
2. Adjust 1RV2241 (PROD RTS CANCEL)/AT-88
board so that the audio level at TP43 (GND: E10)/AT-
88 board is minimum.
TP45
TP44
TP42
E11
S2491
ENG SELECT
RV2342
S1005
S1004
S2301 S2062
S1003
CCU PAINT
-
5
+12
INCOM
-
12
+5
MIC LEVEL
SELECT
AT
REAR
NORM
NORM
INCOM MIC
MIN
MIN
-
-
CH
1
CH
2 CLEAR
ENG
DYNAMIC
CARBON
PRIVATE
(PANEL SIDE)
AT-88 BOARD (COMPONENT SIDE)
AT-88 board panel → "PROD"
Less than
20 mV p-p
TP3
E1
S2241
PROD SELECT
TP46
RV2451
RV2341
RV2452
RV2491
TP40
RV2211
RV2212
RV2241
PGM
ENG
PROD
MIX
RTS
CANCEL
PROD
2W
RTS
2W
SIDE
LEVEL
CANCEL
CANCEL
TONE
2W
2W
CANCEL
LEVEL
CCU-700A
CCU-700AP
TP43
E10
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