Ricoh D146 Service Manual page 1760

4.1.5 SELF-DIAGNOSIS
The following menus can be performed as self-diagnosis functions of the control unit. Either
Japanese or English can be displayed.
1. LED Check
The following control unit LED can be changed over between all on/all off.

Data in

USB access

HOME

Status check (When lit, R->G->B->R->G->B is repeated at 500 ms intervals)

BACK/MENU

FAX

SD access
2. Key check
Check pressing hard keys other than the [HOME] key on the control unit. When a key is
depressed, the corresponding key displayed on the control unit is shown highlighted.
If a foot switch is fitted, while the switch is depressed, the "FOOT SW" column is highlighted.
When the [End] key is depressed, the display returns to the self-diagnosis top screen (the
Return key works as a key check, so it cannot be used as a key to return to the self-diagnosis
top screen).
3. LCD Check
SM 23
System Maintenance
D148