Epson SQ-1170, Service Manual

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REV.-A
Table 2-6 lists the functions of major elements on the MAIN board.
Table 2-6. Major Elements on MAIN Board and Their Functions
Element Location Function
The CPU of this board. It receives data from the host and stores +)
it in the input buffer in by interrupting. The stored data is then
converted to image data and stored in the image buffer in 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 This gate array executes the following functions.
. Memory management
●
Port
●
Printhead control
. EEPROM control
. Parallel interface
panel control
10 This gate array controls the carriage motor (DC motor) by detecting the
motor speed and carriage position.
SLA4391
This drives the carriage motor (DC motor).
12B
11 This drives the PF motor (Stepping motor).
ICI 6 This drives the pump motor (DC motor).
16322 These are head drivers. The head data is received in serial mode.
These (Mask-ROM) are character generators. The font data is stored
these ROMs.
I
M I C19 This RAM is used to store CPU’s working memory, input data, and
image data.
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