EFJohnson 3000 SERIES - Manual (Page 64)

BASIC BOARD MODULE (BBM)
7-2
Figure 7-1 BASIC BOARD MODULE BLOCK DIAGRAM
J12
TP8
P3
3
M
-LE
AD OUTPUT
MA MB
EB EA
DET
E
C
T
O
R
E-LEAD
-15
V
-48
V
3 2 1
J3
6
PO VX
CO
D
E
C
R8
3
TP5
TP3
PC
M
LOOP
RCM A
UDIO
PCM
F
S
K
PERSON
ALITY CARD TX
Tx
DTMF
Tx
P
C
M
FSR
1 2 3
J2
7
CA
R
D
PERSON
ALITY
FR
OM
DTM
F
DECODER
U51
J1
1
T
O
P
E
R
S
ON
ALITY
C
A
RD
6 5 4 3 2 1
R44
T
XA+
TXA-
R4
1
RXA+ R
XA-
S1
S4
8 7 6 5
4 3 2 1
4 3 2 1
S3
R1
02
TD
UA
R
T
U6
RD
SEL
TP4
RD
RC
TD
FS
K
U16
TC
R8
6
R9
0
4 3 2 1
TP9
RXS- TXS- RXS+ TXS+