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J904
Figure 1-4. C 2297/VRC Circuit Paths
J901
U
TELEPHONE LINE
C
V
H
D
M
B
ALL
A
B
C
INT ONLY
K
F
L
E
J
22 TO 32 V DC
INTERCOM/RT A/SRM MIC
RT B MIC
A80
AMP
A
B C
D
E
A
B C
D
E
EARPHONE/LOUDSPEAKER
MIC
KEYING SW
EARPHONE
GROUND
J903 (CONTROLS INTERCOM ONLY)
J902
(CONTROLS
RADIO AND
INTERCOM)
E
B
C
F
K
VOLUME
INTERCOM/UNUSED AM 1780 AUDIO
INTERCOM AUDIO
INTERCOM/RT A VARIABLE AUDIO
INTERCOM/ALL RT FIXED AUDIO
RT B KEYING
RT A AND SRM KEYING
INTERCOM KEYING
N
RT B VARIABLE AUDIO
TELEPHONE LINE
J
D
H
22 TO 32 V DC
TO EXT LAMP
22 TO 32 V DC
MIC INPUT
INTERCOM AUDIO
INTERCOM KEYING
INPUT/SIGNALING
OUTPUT
KEYING
OFF
EXT
SIG
MONITOR
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