Service manual

FO-4700U
FO-47UC
5 – 5
The CIS is driven by the LSI (LC82103), and the output video signal
from the CIS is input into the LC82103 through the amplifying circuit.
The ADC and buffer are provided in the LC82103, and the digital image
processing is performed.
(5) Speaker amplifier
The speaker amplifier monitors the line under the on-hook mode, out-
puts the buzzer sound generated from the SH7021, ringer sound, DTMF
generated from the modem, and line sound.
(6) Reading process and mechanical control block
1) Mechanical control block
The mechanical control block is mainly composed of the gate array (A)
(IC17: LZ9FJ59) to control the following.
(a) Sending motor control
The revolution speed and timing of the sending motor are controlled to
output the control signals to the motor driver (IC7).
(b) End stamp and LED lamp control
On/off of the end stamp and LED lamp is controlled with the software.
(4) Image signal process block
CIS
VIDEO
SIGNAL
AMPLIFIER
CIRCUIT
LC82103
(IC6)
CLOCK
VREF+
VREF–
Fig. 2
(7) Gate array (A) block
This block is mainly composed of the gate array (A) (IC17: LZ9FJ59),
and has the following functions.
Mapper
Mapping is executed in the memory area of the memories, gate ar-
ray (B), modem, CODEC and reading process LSI (LC82103).
Mechanical control block
Refer to 1) Mechanical control block of 2-6 Reading and mechani-cal
control block.
IC interface for clock
Writing and reading to IC (IC30: SM8578BV) for clock is executed in
the clock-synchronous type serial transfer mode.
LIU control port
PC interface
•
Control of PC I/F Asic (FO-47IF)