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KX-FP300E
6.7. NCU SECTION (Change from original page 155.)
6.7.1. GENERAL
This section is the interface between the telephone line and exterminal telephone. It is composed of an EXT.
TEL line relay (RL1), bell detection circuit, pulse dial circuit, pulse dial circuit, auto disconnect circuit, TAM interface
circuit, line amplifer and sidetone circuits and a multiplexer.
6.7.2. EXT. TEL. LINE RELAY (RL1)
1. Circuit Operation
Normaly, this relay switches to the external telephone side (break) and switches to the open side (make) when the unit starts
facsimile communication.
{IC5 (26) High Level
6.7.3. TELEPHONE LINE CONNECTION
NO USED
C15
R19
Q3
+5VD
C16
1
4
3
2
Q14 ON
RL1 (make)
C7
J24
C8
D6
J25
3
2
+
~
1
4
—~
1
4
C12
L8
2
3
C13
L9
C9
C10
+5VD
J27
C4
D4
D3
1
4
+
3
—
2
RLY3
1
3
R13
J26
C162
C6
T2
2
1
6
4
3
3
1
(Model KX-FP300E)
Circuit Diagram
C203
D1 D2
R9
J21
L4
F1
4
3
2
RLY1-1
J23
L5
J22
5
6
7
RLY1-2
C3
R7
FG
IC1
J20
C1
PC1
R8
1
2
3
4
N0 USED
10
J11
J10
J3
J2
J6
POS1
J9
RLY2
J12
3
1
+5VD
+5VD
Q18
J62
Q1
J64
R2
Q2
J16
J8
L1
J7
J15
L2
J5
J14
J4
J13
CN1
1
b2
2
E
3
a
4
b
5
S
6
a2
CN2
1
a2
2
S
3
a
4
b
5
E
6
b2
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