General Description STYLUS 800 Service Manual
1.5 MAIN COMPONENTS
The main components of this printer are:
O
Printer mechanism (M-481O)
Q Main control board
(C106
MAIN BOARD)
~
Power supply unit
(C106PSB/PSEBOARD)
Cl
Control panel
Cl Housing
1.5.1 Main Control Board (C106 MAIN BOARD)
The
C106
MAIN BOARD is the main
conboller
of the Stylus 800. It takes charge of interfacing with
the host computer and processing of received print data, as well as control of the whole printer
mechanism. This board consists of the following components.
CPU
(IC1):
Gate-array
(IC3):
Program ROM
(IC4):
CG
ROM
(IC7/8):
RAM
(IC5):
EEPROM
(IC1O):
CR Motor driver
(IC13):
PF
Motor driver
(QM1):
8-bit CPU
(TMP96C141F-20)
19.6608 MHz operating clock
Includes the following functions:
- MMU (Memory Management Unit)
-
IFU
(Interface Control Unit)
- BMU (Bit Manipulation Unit)
- PCU (1/0 Port Control Unit)
- Head control unit (2 channel:
HCU1,
HCU2)
1 Mbit EPROM
4 Mbit Mask ROM
(IC8
/ for US, Pacific version)
8 Mbit Mask ROM
(IC7
/ for European version)
1 Mbit
PSRAM
1 Kbit (64
x
16
Bit)
EEPROM
3 lines serial bus
Hybrid
IC
SMA7024MEL
Constant current
unipolar
drive
Hybrid
IC
SMA6501
Constant voltage
unipolar
drive
I
Un
u
u
(.
,.
..,,
.!
c
.,.
n
Figure 1-9. C106 MAIN BOARD Component Layout
1-14 Rev. A