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10-6 (76.09.07)
R12, Rewind status
(76.09.08)
12-1 (76.09.02)
12-2 (76.09.08)
12-3 (76.09.07)
12-4 (76.09.07)
12-5 (76.09.07)
R13, Start relay
(76.09.08)
13-1 (76.09.02)
13-2 (76.09.08)
13-3 (76.09.07)
13-4 (76.09.04)
13-5 (76.09.07)
13-6 (76.09.09)
R15, Unload I
(76. 09.09) Latch pick
and latch trip
15-1 (76.09.01)
15-2 (76.09.08)
15-3 (76.09.04)
15-4 (76.09.02)
R16, Unload stop
(76. 09.09) Latch pick
and latch trip
16-1 (76.09.04)
16-2 (76.09.02)
Drops "not file protect" to 76.02.
when drive is in unload status.
Picks when the load-rewind button is depressed.
Supplies a circuit for +48 volts to the 9-3 points so R27 can
pick and the manual-reverse line can be powered.
Supplies a hold circuit for R12.
Furnishes a shift to set the R/W trigger to read status in a
high-speed rewind operation.
Keeps "not file protect" down during rewind operations.
Drops "mechanically ready" to 76. 01 and brings up "rewind »
status" to 76.08.
"Rewind status" ANDfs with select bring
ing up "select and rewind status" to the tape control unit.
Picks when the start button is depressed and holds until r e
set is depressed.
Breaks the circuit to the C .E . switch when the tape drive is
in use with the CPU or other I/O machines.
Hold point for R13.
Drops "relay reset" to 76.02 so that the R/W triggers can be
operated.
Opens the circuit to the load-rewind switch when the tape
drive is in use with CPU or card machines until reset is de
pressed.
Brings up "mechanically ready" to power the ready light and
the lower leg of AND circuit to 6JA12F (76. 01).
Opens the circuit from the unload switch to the latch pick
coil of R15 for unload.
set button first.
Latch picks when the unload button is depressed.
when R21 is picked for a load-rewind operation.
Parallels R5AU, R6AU, and R7AL to hold R l, HD1, HD2,
and HD3 during an unload operation.
Picks and holds R2 and R28 when the unload button is de
pressed.
Picks R10 (Unload II) relay.
Breaks the circuit to R27 thus dropping GO if the unload
button is depressed while in manual forward or backward go
operation.
Latch picks during an unload operation when the head is up
and tape is out of both columns.
rewind button is depressed.
N/C points complete the circuit to HD4 to start vacuum motor.
N/O points supply +48 volts to the 21-1 points to latch trip
R16 for load rewind.
Picks DP4 to start the take-up motor in a load rewind opera
tion.
124
Keeps write status down
Cannot unload without hitting the r e
Latch trips when the load-
Latch trips
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