Ricoh D129 Service Manual page 677

Carriage Save
Moves the exposure lamp a short distance away from the home position and
stops.
Touch [Execute] > "Completed" > [Exit]
4806
Do SP4804 to return the exposure lamp to its home position.

This SP is done before shipping the machine to another location.

Cycling the machine power off/on also returns the exposure lamp to
its home position.
SBU Test Pattern Change
[0 to 255 / 0 / 1 /step]
1: Grid pattern
4807
2: Gradation main scan
3: Gradation sub scan
4 to 250: Default (Scanning Image)
Factory Setting Input (DFU)
4808* Execution Flag
Scanner Lamp Select
[0 to 1 / 1 / 1 /step]
4809*
0: Xenon Lamp
1: LED
This SP switch the light value depends on the scanner lamp type.
SM Appendix
[0 to 1 / 0 / 1 /step]
3-73
System SP Tables-4
D129/D130