Oki OKIFAX 5400 Maintenance Manual page 338

TEL-W1 (option)
CO1 to CO4
CN4
RO1 to RO4
Connected to
TEN-KEY
circuit
DB1
CN3
~
Connected to
~
HOOK Circuit
Rectifier
PB/DP
Setting
CN1/CN2
Connected to
Pulse Dialling
NTIF Circuit
Adjustment
(Make ratio)
DC V-1
Characteristics
Circuit
Dialling
Circuit
MUTE
VDD
+
-
VSS
DPMUTE
P/T
BMR
Figure A3.5.3 Block Diagram of TEL-W1 (option)
Speech IC (IC1)
VL
Side Tone
TIN+
RIN
Adjustment
Return Loss
TIN-
CL
Adyustment
MUTE
Receiving
RPO
Level
Adjustment
MF Dialling
MF
Adjustment
R01
Manual Pad
MPAD R02
Adjustment
Automatic
Gain AGC
Control
Sending
Sending Level
Frequence
Adjustment
Responce
Circuit
+
CN5
Microphone
Handset
Receiver