FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 MECHANICAL/ELECTRICAL
98.04.24
M-21
1174SBM0901A
An AC halogen lamp is used as the Exposure Lamp.
As the exposure level is adjusted on the control panel, the duty ratio of the pulse of AVR
Remote from the Master Board changes to increase or decrease the Exposure Lamp volt-
age, thereby changing the image density.
In Photo mode, the voltages are varied on a level 5V lower than the manual Exposure Lamp
voltages.
✽ At Manual Exposure Setting 1 only VG is reduced, thereby giving a lamp Voltage differ-
ence equivalent to +8V.
✽ If reduction copies are made using large size paper, the trailing edge of the first copy
moves past the Transport Roller Sensor after the SCEND signal for the second copy has
been generated. If the Exposure Lamp is turned ON for the second copy at the same tim-
ing as the first one, therefore, the image for the second copy is produced on the trailing
edge of the first copy. To prevent this from occurring, the Exposure Lamp is turned ON for
the second and subsequent copies when all of the following conditions are met:
• Approx. 0.8 sec. or more have elapsed after the first copy deactivated the Transport
Roller Sensor.
• The Transport Roller Sensor output is HIGH.
• The SCEND signal for the second copy is output.
9-1. Exposure Lamp
Manual EXP Setting 9 8 7 6 5 4 3 2 ✽ 1
Lamp Voltage
Difference (V)
–8 –4 –2 –1 Reference +1 +2 +4 +4
Control Signal ON OFF WIRING DIAGRAM
AVR Remote
Signal (LA1)
PWB-A PJ14A-3 L H 6-D
1174T13MCA
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