Exposure Lamp Voltage Control - Ricoh A219 Service Manual

3.6 EXPOSURE LAMP VOLTAGE CONTROL

The main board controls the exposure lamp voltage through the ac drive/dc
power supply board. The exposure lamp voltage is based on the base lamp
voltage and various correction factors. The method of control is different
depending on whether the image density is manually selected or the auto
image density mode is selected.
The exposure lamp voltage is determined by the following factors:
Lamp Voltage = Base Lamp Voltage Setting (SP48)
*NOTE: SP34 (Image Density Adjustment Factor) is applied for ADS mode
only.
The "Manual Image Density Factor" is applied for manual ID mode
only.
1) Base Lamp Voltage Setting
The lamp voltage is determined by the SP48 setting.
Base Lamp Voltage = SP48 setting x 0.5 (120 V machines)
The default setting is: 140 = 70 V (120 V machines)
The current lamp voltage (after all correction factors are included) can be
viewed with SP 51.
SM
CÓPIA NÃO CONTROLADA
+
*Image Density Adjustment Factor (SP34)
+
*Manual Image Density Setting Factor
+
V Correction 1 Factor (SP62)
L
+
V Correction 2 Factor
L
+
Reproduction Ratio Correction Factor
SP48 setting x 1.0 (230 V machines)
140 = 140 V (230 V machines)
2-11
CÓPIA NÃO CONTROLADA
OPTICS
A219