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Samsung Electronics
CIRCUIT DESCRIPTION
Repair Manual
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3
LIU PBA
The LIU (Line Interface Unit) using the discrete method is comprised of the following.
(1) Tel_line Interface Circuit that connects the PSTN(exchange) and the system (Facsimile)
(2) Telephone circuit composed of dial/speech circuit.
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-1 Tel_Line interface Circuit
Tel_Line Interface is the path that connects the signals between PSTN(exchange) and the system (Facsimile) and it is com-
prised of Tel-Line Interface Circuit and Impedance Matching Trans Circuit.
(1) TEL_LINE Interface Circuit
(2) TRANS Circuit for IMPEDANCE MATCHING
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-2 Telephone Circuit (Ringer/Dial/Speech Circuit, etc)
The telephone circuit is comprised of ring detect circuit, dialer circuit, speech circuit, external hook detect circuit and recall
circuit.
(1) Ring Detect Circuit
(2) Dialling Circuit (including MF Dialling Signal Transmitting Circuit)
(3) Speech Circuit
(4) External Hook Detect Circuit
(5) Recall Circuit
Summary of Contents for SF-530 Series
Page 87: ...Electronics ...
