OKIDATA OF1000, Руководство по обслуживанию

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Page: 195
Service Guide OF1000
Chapter A Reference Charts
A.2.02 Printer Control Board (PCNT-150)
Function
This board controls the drum, resist, scan, and fan motors. It controls the fuser unit temperature
and high voltage circuit, stores buffer memory (DRAM) of picture data, and generates head strobe
signals (which enable the LED print head).
Firmware
· IC 21: 32 Kbyte ROM - Contains printer control program
Fuses
NONE
Jumpers
NONE
Sensors
NONE
Switches
Switches (1-4) on Switch Pack 1 are used to set the LED head drive time.
Refer to Section 3.3 of
this Service Handbook for LED Drive Time Settings.
Test Points
CN6, Pins 02, 03: + 38 vdc
CN6, Pin 01: + 12 vdc
CN6, Pin 04: - 12 vdc