Liu Pba - Xerox WorkCentre PE16 Service Manual

Summary of Product

4.6 LIU PBA

LIU board is a Line interface unit, and it is a circuit for interfacing a telephone line with a modem. The circuit consists
of matching transfer to conform to impedance of a receiving telephone line and a circuit to conform to impedance of a
modem.
Also, there is a ring detect circuit to detect a ring signal from a switchboard and a surge absorber to protect it from an
external high voltage supply applied to a line input unit.
4.7 OPE PBA
OPE board consists of various function keys and LCDs to display key operations. MICOM creates
a circuit using HT48R50 MICOM of HOLTEC CO. and applies LED and LCD. The communication
method with the Main Board CPU is a UART, and related signals are /Reset, TXD, and RXD.
Service Manual
4-18
July 2003
Ring Detect Circuit (PC814)
Relay
Tel-Line Jack
Surge
Absorber
WorkCentre PE16