Epson SQ-1170 Service Manual page 69

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
Element Location ~
E05A65
SLA4391
ICI 6
M PS-RAM I C19
I
The CPU of this board. It receives data from the host and stores (V25 +)
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.
This gate array executes the following functions.
. Memory management
Printhead control
. EEPROM control
. Parallel interface
This gate array controls the carriage motor (DC motor) by detecting the
motor speed and carriage position.
This IC drives the carriage motor (DC motor).
This IC drives the PF motor (Stepping motor).
This IC drives the pump motor (DC motor).
These are head drivers. The head data is received in serial mode.
2-30
Function