Control Board (Lxmc-3) - Rev C - OKIDATA ML320 Service Manual

A.2.02 Control Board (LXMC-3) - Rev C
Function
The control board contains the microprocessor and its peripheral circuits. The drive circuits,
paper end sensor, and the interface connector are on this board. A 3.25 V lithium battery is
on this board.
Firmware
Q13
Q8 and Q9
Q12
Fuses
F1: Inline Fuse
Jumpers
SP1 Side A
SP2 Side A
Side B
SP3 Side B
Sensors
Paper End
Switches
SASF
Test Points
CN6
+ 5 vdc, + 8 vdc, + 38 vdc, 10 vac
ALM-P If this line goes high (+ 5 vdc), the fuse on the filter assembly will open.
Refer to Section Two ( ) of this Service Handbook for more details.
Service Guide ML320/ML321
Program ROM
Dynamic RAM (require a constant refresh signal)
Static RAM (backed by a 3.25 V lithium battery)
Enable I-Prime
Auto Line Feed always enabled
Auto Line Feed status determined through Menu setting
+ 5 vdc is applied to Pin 18 of the parallel interface
Chapter A Reference Charts
Side B Disable I-Prime
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