Figure 1-13. C076 Main Board - Epson SQ-1170 Service Manual

1.7.1 C076 MAIN Board (Main Control Circuit
The C076 MAIN board is the main board in the printer,
mechanism driver circuit.
The KPD70325 (location: IC5) is used, and the
1 M byte memory space.
Memories
5 12K\l M bits program ROM
1 M bits PS-RAM
Gate Arrays
Memory management unit (E05A65)
Motor control unit (E05A48)
Driver
CR motor (DC motor) driver (SLA4391)
PM motor (DC motor) driver (SDH03)
PF motor (Stepping motor) driver (STK67 12B)
Printhead driver (MPD 16322)
Others
EEPROM
Reset IC (MB3771)
Reset IC (PST529C)
Switching Regulator (TL494)
Lithium battew
A lithium battery in the battery circuit backs up the head cleaning timer while the printer power is off.
'
I
GA E05A48
-
1 - - 1

Figure 1-13. C076 MAIN Board

Board)
and contains a logic circuit and printer
following memories and gate arrays are assigned in the
:Ic14
:Ic12
:Ic17
:IC16
:IC21
:BAT 1
CPU PPD70325 P-ROM 5 12K
n =
GA L05A65 (1C12)
1-26
o'
1 M
-