Hardware Overview - Gestetner A265 Service Manual

2. DETAILED SECTION DESCRIPTIONS

2.1 HARDWARE OVERVIEW

BICU
SCANNER CONTROL
BOARD
- Image Input Circuit -
C P U
U P D 7 0 5 1 0 1 G M
(33.3 MHz)
Flash
D R A M
R O M
(16 MB)
(2 MB)
The scanner controller contains image input and network interface circuits. The
image data from the BICU is compressed in the image input circuit, then the data
goes to the network through the network interface circuit.
Each circuit has a CPU and flash memory IC. The functions of each major
component are as follows.
SM
CÓPIA NÃO CONTROLADA
M B
FIFO
(256 kB)
A S I C
U P D 6 5 8 4 2
Flash
D R A M
M e m o r y
S I M M
Card
Slot
Slot
18-3
CÓPIA NÃO CONTROLADA
HARDWARE OVERVIEW
- Network Interface Circuit -
S R A M
D R A M
(2 MB)
E E P R O M
A S I C
Bridge
DISCII
A G 1 0 0 1 V
Flash
C P U
R O M
M C 6 8 3 4 0 V P
(25.166 MHz) (2 MB)
M A C
A M 7 9 C 9 7 1
P H Y
ICS1892
R J 4 5
Network
A844D500.WMF
A265/A267