Specifications

Summary of Product
Service Manual
4-23
Samsung Electronics
4.8.2 LIU PBA
The LIU board is the Line interface unit. It consists of a Tel_line Interface circuit and Telephone circuit.
The Tel_Line circuit consists of a matching transfer to conform to the impedance of the receiving telephone line and a
circuit to isolate the fax machine from the PSTN, and a surge absorber to protect against lighting strike surges on the
incoming line.
The Telephone circuit is consists of ring detection circuit, speech circuit, external hook detection circuit, and recall circuit.
4
5
6
2
3
1
1 TRANS MATCHING T1
2 TRANS MATCHING T2
3 RELAY RE1
4 VARISTOR VAR1/VAR2
5 JACK MODULAR(TEL) MJ1
6 JACK MODULAR(EXT) MJ2