Head Not Loading - Control Data Corporation BR8 SERIES Hardware Maintenance Manual

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6.5.6 HEAD NOT LOADING
(Perform procedure 6.5.4 prior to performing this trouble shooting procedure).
77834769-U
ADJUST DISK
LOAD BAIL
(Par. 6.6.6)
REPLACE HEAD
LOAD SOLENOID
(Par·. 6.7.5)
CHECK
SIGNAL LEVEL
AT U22, PIN 2
(-HEAD LOAD)
CHECK
SIGNAL LEVEL
AT J5-4
CHECK
SIGNAL LEVEL
AT J5-2
REPLACE
PC Bo\RD
CHECK
I/O CABLE OR
CONTROLLER
ADJUST DOOR
INTERLOCK
SWITCH SET
SCREW TO
INSURE
SWITCH
CLOSURE
(P ar. 6. 6. 5)
YES
REPLACE
INTERLOCK
SWITCH
6-9