THEORY GUIDE Power Distribution
10DEC05
TG4825-1
Page
110 of 120
The FRONT DOOR INTERLOCK SWITCH controls RELAYS on the MSC BOARD A1 that de-
energize the following systems.
Systems Protected by
INTERLOCK SWITCH
Description
MSC BOARD A1 • has an LED that indicates the status of the INTERLOCK SWITCH -
DS25
• has LED INDICATORS for the 4 INTERLOCK RELAYS:
– DS8
– DS14
– DS15
– DS16
• controls the INTERLOCK SWITCH for all DC MOTORS
SLOW SCAN
CONTROLLER
BOARD A6
• +5 V DC is continually energized when the CR 825/850 SYSTEM is
energized
• +24 V DC is de-energized when the INTERLOCK SWITCH is
opened
LASER DRIVER
PRE-REGULATOR
BOARD A18
• –24 V DC to the BOARD is de-energized when the INTERLOCK
SWITCH is opened
• –24 V DC to this BOARD is routed through the GALVO BOARD, but
is not used by the GALVO BOARD
Note
The GALVO BOARD is continually energized when the CR 825/850
SYSTEM is energized.
LASER DIODE
DRIVER BOARD
A17
6.5 V. DC from the LASER DRIVER PRE-REGULATOR BOARD A18 is
de-energized when the INTERLOCK SWITCH is opened.
ERASE LAMPS 120 V AC is de-energized when the INTERLOCK SWITCH is opened.
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