Oki LP-1040 Maintenance Manual page 725

A.1.2 ARC1/ARC2 Circuit Board's SW2 DIP Switch Setting
Make sure that the SW2 settings corresponds to the circuit board revision.
4
Off
On
A.1.3 ARC1/ARC2 Circuit Board's SW3 DIP Switch Setting
All bits of the DIP switch SW3 should be set to the Off side, that is, Down side.
On
Off
4
Bit
1
2
3
4
A.1.4 ARC1/ARC2 Circuit Board's SW4 DIP Switch Setting
The bit 3 of the DIP switch SW4 should be set to On (up side), and the other bits should be set
to Off (down side).
On
Off
1
A-2
3 2 1
Up
Down
3 2 1
Meaning when set to
On position
－
－
For version upgrade only
For version upgrade only
Up
Down
2 3 4
Revision
4
A On
B On
C On
D On
E On
F On
G On
H On
Meaning when set to
Off position
－
－
－
－
SW2 Setting
3 2
On On
On On
On Off
On Off
Off On
Off On
Off Off
Off Off
Normal
Position
Off
Off
Off
Off
1
On
Off
On
Off
On
Off
On
Off