Control Data Corporation CYBER 180 810 Maintenance And Parts Manual page 103

THERMISTOR
TOOLS REQUIRED
NOTE
Inlet (ambient) air temperature thermistor
is part of the air flow sensor assembly.
This procedure refers to the outlet air
temperature thermistor, refer to figure
6-2 for location.
Wire stripper (12262555), soldering iron (12263214), electrical tape or
heat-shrinkable sleeving.
REMOVAL
1. Remove power from computer cabinet following Computer Cabinet Power
Down procedure steps 1 through 4.
2. Detach access panel on top of cabinet by removing mounting screws.
3. Locate thermistor (copper-plated 3/4 inch bicylinder assembly)
attached to a mounting screw.
4. Disconnect thermistor from mounting screw.
5. Sever thermistor assembly wires six inches from assembly. Thermistor
assembly detaches.
6. Remove sleeving from ends of severed wire leads with wire stripper.
7. Sever replacement thermistor assembly wires six inches from assembly.
8. Remove sleeving from ends of replacement thermistor assembly wire
leads with wire stripper.
REPLACEMENT
1. Solder replacement thermistor assembly wire leads to cabinet wire
leads.
2. Insulate wire connection by attaching protective sleeving or wrapping
electrical tape around connection.
3. Connect thermistor assembly to mounting screw.
4. Reattach blower access panel by replacing mounting screws.
5. Apply power to computer cabinet following Computer Cabinet Power Up
procedure steps 4 through 8.
60469500 A
6-9