OKIDATA OL400e Series, Service Manual

Page: 362 / 397

Page: 222
Service Manual for OL400e/OL410e/OL410e-PS
Chapter A Reference Charts
A.2.01 Main Controller Board (OLCW)
Function
The main controller board controls the data reception and page formatting functions. This board
also controls the print engine and reports printer errors/status through the operator panel. The
main control board in the OL410e contains 1 Mbyte of RAM.
Firmware
Q2: Program ROM - 512 K PROM. (OL410e - 1 M PROM) Stores the printer control
program.
Q3: Font ROM - 512 K ROM. (OL410e - 512 K ROM) Stores the bit-mapped fonts.
Q9: EEPROM - 1 K x 1 bit EEPROM. Stores Menu Data, Counter Data, Print.
Intensity Values and Start of Print Position Value.
Fuses
NONE
Jumpers
SP1: CLOSED Debug Mode (Factory Use Only)
OPEN Normal Position
OPEN is the default position for SP1.
SP2: Not installed at this time
SP3: A SIDE +5 vdc supplied to Pin 18 of Centronics Interface
B SIDE +5 vdc is NOT supplied to Pin 18 of Centronics Interface
The A SIDE is the default position for SP3.
Sensors
NONE
Switches
NONE
Test Points
NONE