Specifications

REV.-A
Table 2-6 lists the functions of major elements on the C076 MAIN board.
Table 2-6. Major Elements on
C076 MAIN Board and Their Functions
r
Element Location ~ Function
wPD70325 IC5 The CPU of this board. It receives data from the host and stores (V25 +)
(V25 +)
‘ it in the input buffer in PS-RAM by interrupting. The stored data is then
converted to image data and stored in the image buffer in
PS-RAM. The
image data is then transmitted to the gate array, where the image data
is converted to the serial data. This processor also controls each printer
mechanism and the control panel, and receives signals from each sensor.
E05A65
Ic12
This gate array executes the following functions.
. Memory management
● 1/0 Port
● Printhead control
. EEPROM control
. Parallel interface
.Control panel control
i05A48
Ic 10 This gate array controls the carriage motor (DC motor) by detecting the
motor speed and carriage position.
SLA4391
Ic17 This IC drives the carriage motor (DC motor).
>TK67 12B
Ic 11
This IC drives the PF motor (Stepping motor).
50H03
ICI 6 This IC drives the pump motor (DC motor).
~PD 16322
IC8,9
These are head drivers. The head data is received in serial mode.
t140B03
IC4
I These ICS (Mask-ROM) are character generators. The font data is stored
! in these ROMs.
I M PS-RAM I
C19
1 This RAM is used to store CPU’s working memory, input data, and
(IC22)
~ image data.
0
. . . . .
.
,-..
2-30