34-1 (09.02)
R35, 36, Rewind status
(09.01)
35-1 (09.01)
35-2 (09.01) N/C
N/O
35-3 (09.01)
35-4 (09.01)
36-1 (09.03) N/C
N/O
36-3 (09.02)
36-4 (09.03)
R40, Rewind pick up
(09.03)
40-1 (09.04)
R41, Tape break (09. 03)
Latch pick
Latch trip
41-1 (09.04)
41-2 (09.03)
41-3 (09.06)
R42, Load point
42-1 (09.01)
42-2 (09. 03)
42-3 (09.03)
tester can also be used to pick R34 when the tape unit is
not in rewind status.
Bring up the manual start line in order to energize the mov
ing coil and move tape.
They pick when the load rewind button is pressed (31-4) if
the tape is not already at load point. They hold until load
point is reached.
Hold point for R35, 36.
Allow external forw ard-reverse switch to control R33, R34.
Allow a manual reverse at a time determined by R31-2.
It is protection if the read-w rite status trigger should burn
out. During rewind, the write and erase heads cannot
conduct.
This point allows the machine to stop when the capstans are
extended, following a high-speed rewind during which the
tape break light burned out. This is essential because the
unit is not always unloaded after load point is reached.
Prevent the machine from being ready while rewinding.
Bring up the rewind status line and allow R7BU to control
the rewind interlock line.
It is added protection to insure that the read-w rite status
trigger is held off while rewinding.
Prevent the ready light from being on while rewinding.
It is picked: (a) by the load rewind button if the tape is not
at load point, the machine is in read status, the start r e
lay R20 is down, and the door is closed, (b) by the start
rewind line from the control unit if the tape is not at load
point and the tape unit is selected and ready.
R40 holds until: (a) the load rewind button is released,
(b) the select and ready line goes down.
Pick R2 to start a rewind operation providing the photo
lights are good.
It picks if tape breaks while rewinding with the capstans in
(high-speed).
R41 drops when the unload button is pressed following a
tape break.
Drop the run relays in case of a tape break.
Prevent energizing R41LT continuously while unloaded.
Prevent continuous energization of HD8 in case tape breaks
while slowing down after a high-speed rewind.
It is latch picked when the load point passes under the load-
point photo cell. It is latch tripped when leaving load point
(pick R19).
Drop the rewind status relays when load point is reached.
(a) Prevent R19 from being picked every time the start line
goes up. (b) Allow " select and at load point" to go plus if the
tape unit is selected.
Prevent starting a rewind operation if already at load point.
90
Summary of Contents for 727
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Page 93: ...039 0035 FIGURE 1 BIT PO SITIO N S O N TAPE CURRENT GENERATOR FIGURE 3c...
Page 95: ...w PATH OF TAPE THROUGH MACHINE FIGURE 6...
Page 97: ...SPLIT IDLER ASSEMBLY FIGURE 8...
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Page 99: ...CLUTCH HOUSING POWDERED IRON AND GRAPHITE MIXTURE FIGURE 10 MAGNETIC CLUTCH...
Page 100: ...PUSH ROD DIAPHRAGM VACUUM COLUMN SWITCHES FIGURE II...
Page 101: ...BACKWARD MOTOR CAPSTAN MOTOR FORWARD MOTOR...
Page 102: ...LATCH FIGURE f3...
Page 103: ...140 140...
Page 107: ...FIGURE 18 HEAD ASSEMBLY A DJUSTM ENTS...
Page 108: ...TAPE C LEA N ER FIG URE 19...
Page 109: ...VACUUM COLUMN ADJUSTMENT FIG U RE 22...
Page 110: ...DRIVE MOTOR PULLEY CAPSTAN DRIVE BELT TENSION FIGURE 23 REAR VIEW S...
Page 113: ...CONTROL UNIT TAPE DRIVE TESTER FIGURE 28 TAPE DRIVE TESTER CO NN EC TIO N S...
Page 116: ...FIGURE 32 HIGH SPEED REWIND...
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