Ricoh D065 Service Manual page 768

Some host systems submit jobs that contain both PS and PCL5e/c. If Auto
PDL switching is disabled, these jobs will not be printed properly.
bit 4 DFU
bit 5 DFU
bit 6 DFU
bit 7 DFU
1001 Bit Switch
003 Bit Switch 3
bit 0 DFU
bit 1 DFU
bit 2 [PCL5e/c]: Legacy HP compatibility
Enable: Uses the same left margin as older HP models such as
HP4000/HP8000.
In other words, the left margin defined in the job (usually "<ESC>*r0A")
will be changed to "<ESC>*r1A"
bit 3 DFU
bit 4 DFU
bit 5 DFU
bit 6 DFU
bit 7 DFU
1001 Bit Switch
004 Bit Switch 4 DFU
1001 Bit Switch
SM Appendix
Service Program Mode Tables
-
-
-
-
0
-
-
0: Disable
-
-
-
-
-
-
4-235
-
-
-
-
1
-
-
1: Enable
-
-
-
-
-
-
D062/D063/D065/D066