Operating Principles Of Control Circuitry; Control Circuitry Overview - Epson SQ-1170 Service Manual

2.3 OPERATING PRINCIPLES OF CONTROL CIRCUITRY

This section describes the operating principles of the control circuitry of this printer - C076 MAIN
board.

2.3.1 Control Circuitry Overview

The C076 MAIN board is provided with wPD70325 (V25 +) (9.5 MHz) – a 16-bit one-chip micro-
processor, E05A65 - a gate array with memory management function, and E05A48 – a gate array
to control DC motors. Figure 2-38 shows the control circuitry block diagram.
– – - – –
I -
I
1
, Panel
- - - - - - - -
- - -
, - - - - - - - - - - - -
I
GA
Parallel
l/F
I , – - - - - –,
1
Option
I
I
, l/F
I
I - – - - – J
EEPROM
I
r
I
I
uPD1 6322 SOH03
I
I
I
I
- - - - - - - - - - - - - - -
I
STK
Figure 2-38. Control Circuitry Block Diagram
- - – - - – - - - - – -
Battery
2-29
- - - - - - - - -
Reset
Circuit
. _ _ - — - _ - — — - - - — - — - —
I
I
I
I