Panasonic UF-6300 Service Manual page 193

SHINE
IC3
6.2.7 Line Control Circuit
The Line Control Circuit consists of CML relay, DP circuit, DAA (Direct Access Arrangement), Ring Detect
Circuit for power-save and DC hold circuit. A Jack for an external telephone, which can be used for either
an external telephone or an optional Handset Kit. The block diagram of the Line Control Circuit is shown
below.
Line
Connect either one
External
Telephone
Ringer
IC
Speech
IC
Optional Handset Kit
Tx Motor Driver Circuit Block Diagram
SC PCB
CML Relay
External
Telephone
Jack
+ ~
- ~
Hook SW
+ ~
- ~
+24V
Motor
Driver
IC36
R370
+24V
Motor
Driver
IC37
R371
Ringer Signal Detection,
TAM I/F,
DTMF Remote Detection
DP
Circuit
DC Hold
Circuit
Ring Signal
Detector
for Wake-up
Off-Hook (PC301)
Detection
MJR3 PCB
Line Control Circuit
193
Tx Stepper
Motor
DAA DAA
Line Control
I/F I/F
Si3019 Si3056
(IC23) (IC24)
DP Control
PNL
MODEM
MMD5020
CPU
IC3
SHINE