3. TEST POINTS/DIP SWITCHES/LEDS
3.1 MAIN CONTROL BOARD
The function of the test points, DIP switches, and LEDs are the same as
those of the base copier (A109).
3.2 IPU BOARD
3.2.1 DIP switches
SW301-1:
Selects the accuracy level of synchronizing the video signal clock (18.6
MHz) with the laser synchronizing signal.
OFF: 1/4 clock ON: 1/10 clock (MUST BE ON)
SW301-2:
Designer’s use only (MUST BE OFF, otherwise the entire background
appears dirty.)
SW301-3, 4, 5:
Used by designers for monitoring signals. (NORMALLY OFF)
3.2.2 LEDs
LED 308:
Laser synchronizing signal monitor
LED309:
Monitor for the combination of SW301-3, 4, 5
A172/A199 4-68 SM
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