Ricoh G147 Service Manual page 216

Polygon Mirror Rotation Switch DFU
Switches the number revolutions per minute of the polygon mirror motor.
2981
0: Rpm determined by engine
1: Rpm for 35 CPM (35 cpm)
2: Rpm for 45 CPM (45 cpm)
SP3-xxx: Process
3001 ID Sens Initial
ID Sens PWM Set
[0 ~ 255 / 100 / 1 step]
001
Allows you to reset the PWM of the ID sensor LED to avoid a service call error
after clearing NVRAM or replacing the NVRAM.
The PWM data is stored by executing SP-3001-2.
Initial Setting
Performs the ID sensor initial setting. ID sensor output for the bare drum (VSG) is
002
adjusted automatically to 4.0 ±0.2 V.
Press "Execute" to start. Perform this setting after replacing or cleaning the ID
sensor, replacing the drum, or clearing NVRAM.
ID Sens Out Disp
Presents on the display the current values of Vsg, Vsp, Vpdp, and grayscale
control.
3103
If the ID sensor does not detect the ID pattern, "VSP = 5.0 V/VSG = 5.0 V" is
displayed and an SC code is generated.
If the ID sensor does not detect the bare area of the drum, "VSP = 0.0 V/VSG
=0.0 V" is displayed and an SC code is generated.
001 Vsg
[0V ~ 5.00V]
Vsg is the ID sensor output after reading the bare drum surface.
Normal display: 4±0.5 V
G147
ID Sensor Initial Setting
ID Sensor PWM Setting
ID Sensor Initialization
ID Sensor Output Display
Drum Surface Output
5-26 SM