Oki OKIOFFICE84 Maintenance Manual page 307

CN2
(1/2)
T
TEL1
CN2
TEL2
(2/2)
SR
8
RL2
S
Shunt
TEL
CN1
CML
LINE 1
7
AR , AR
1 2
arresters
CN26/CN36
(F) (UK)
RL7 F
IC
2
F
OFF-HOOK
Detector
IC
1
Ring Detector
C
C R
31 590
RL3
RL1 C
11
B
MUTE
DBI
9 DP FICC
IC5
3
IC Q
6
Q1, Q2 Q3 4
R
Constant DC
current current
IC
7
H
0
MUTE
CN26, CN36
Figure A3.5.3 Block Diagram of FN5
D
E
T
1
5
G
S5-1, 2
Impedance
matching NT
PP
A
RL6
S5-3 to 6
CN3
OH2
RI
S
6
to Modem
Receiving
Rp
sensitivity
Adj
R