Safety Interlock; Total Page Counter And Permenent Parameters Strorage - Kyocera Ecosys FS-600 Service Manual

Safety interlock

For the safety purpose, and in order for the product to conform to the safety standards
required by the U.S. FDA and several European regulations (IEC 825), the printer is
facilitated with the safety interlock circuit.
When the top cover is open, the interlock microswitch disconnects DC power (+24V). This
causes the engine CPU to forcibly turn down the laser emission.
shatter mechanism is activated to block the laser beam not to reach the drum unit.
+ 2 4 V

Total page counter and permenent parameters strorage

An EEPROM (Electrically Erasable Memory) is used to retain those information that
should be intact even while the printer power is off—total page count and permanent
parameters such as margins, fonts, etc.
This EEPROM also keeps information such as the printer's ID (serial number) which
should be kept belonging to the printer. Therefore, if the engine controller board (KP-589
[FS-600] or KP-717 [FS-680]) is changed during service, the EEPROM, U202, should be
removed from the old board and fit on the new board. Otherwise, all statistic information
will be lost.
1
The interlock microswitch, when activated as above, disconnects also the high-voltage output, main motor, fan motor, and the
semiconductor switch for the fuser heater.
In t er lo ck sw it ch
En g in e CPU
Scan n er u nit
M ain
Fan
m o t o r
Sh u t t er
4-23
Operation theory
Operation overview
1
At the same time, the
Hi-vo lt ag e
u nit
Dr u m
FS-600/FS-680