1-3. LIU (Line Interface Unit)
This unit performs all interface functions to the telephone line and contains an internal telephone unit. Refer to Ap-
pendix A ‘‘Line Interface’’ for details.
1-4. PSU (Power Supply Unit)
This unit regulates the 120/220-240 V ac input and gen24V for the FDU and thermal head. The power cord
and the main switch are separate from the PSU assembly and are fixed to the body frame.
1-5. SBU (Sensor Board Unit)
This unit has a CCD which scans the document and detects light path blockage by the document/scan line sensor
actuators.
1-6. OPU (Operation Panel Unit)
This unit receives all keypad input information and indicates instructions for users using LEDs and an LCD. The ten
key pad is still available for dialing even if the main power is switched off.
1-7. HSB (Hook Switch Board)
This board has a hook switch and a ringer.
2. Data Flow
2-1. Transmission
Data/Address Bus
AFE
DSP
(Modem)
SRAM
FIFO
Line
Buffer
DRAM
(ECM:128kB)
DRAM
(SAF:128kB)
KFCP
EIO2
DCR
P/S
Digital Video Process
Analog Video Process
SBU
T/H
FCE
FDU
HIC2
AVM ROM
Voice
Processor
LIU
LINE
FAX240 only
C-2
