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8. 1.4 Power Off Sequence
Dual Level or Trilevel
D
Primary Power Fault;
Inhibit Disk Drive
Write Current
Faul
OV /OC/UV Sensed
Inhibit Undervoltage
Sense of Multilevel
Supply
Turn off
Blower Motors
Note 4
Dual Level or Trilevel
Supply Fault
Thermal
Condition
OV /OC/UV Sensed
Inhibit Undervoltage
Sense Dual Level or
Tril~v~1
Supply
Inhibit Undervoltage
Sense of Multilevel
Supply
Turn off 33FD
and Blower Motors
Inhibit Undervoltage
Sense of Dual Level or
Trilevel Supply
Turn off
Drive Motors
Note 3
D
Turn off Disk
Drive Motors
Normal
Power Off
POWER
Switch Off
8-4
Notes:
1.
Plus and minus
24
volts must decrease to
+4.6
volts
and
-2.1
volts, respectively, before dropping the
multilevel supply.
2. A
multilevel supply failure simultaneously turns off
the multilevel and dual or trilevel level supplies.
A
multilevel supply fault or dual level or trilevel sup-
ply fault turns on the PWR CHK light on the opera-
tor control panel.
3. Temperature too high in the power supply, belt
printer, or gate turns on the TH CHK light on the
operator control panel.
4. A loss of ac input power (fuse
101
blown, mainline
switch turned off, or line cord pulled) is not indi-
cated by the PWR CHK light.
To restore system power following a power fault
condition:
a. Turn operator control panel POWER switch to
OFF.
b. Press RESET switch on CE control panel.
c. Turn operator control panel POWER switch to
ON.
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