Bell System DATASPEED Adjustments And Lubrication

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BELL SYSTEM PRACTICES
AT&TCoStandard
SECTION 582-900-700
Issue 4, November 1974
1.
"DAT ASPEED*" MAGNETIC TAPE SET
TAPE TRANSPORT
ADJUSTMENTS AND LUBRICATION
CONTENTS
GENERAL ..... .
A. Cleaning of Recording Head . .
B. Tape Drive Clutches and Brake
Assembly ..... .
C. Photosensor Assembly
PAGE
2
2
2
5
CONTENTS
Pinch roller engagement
Pinch roller parallelism
(final) . . . . . . . . . .
Pinch roller parallelism
(preliminary) . . . . . .
Pinch roller torsion springs
Reverse clutch armature
2. ADJUSTMENTS . .
6
assembly ....... .
Gear Shift Mechanism
Clutch trip lever
Clutch trip lever spring
Gear shift position
Input gear overload clutch
Magnet coil position
Motor pinion gear backlash
Reel drive idler arm spring
Spring clutch gear assembly
endplay ....... .
Reel Drive Mechanism
Supply and take-up reel drive
gear backlash . . . . . . . .
Supply reel hub height and clearance
(final) ............... .
Supply reel hub height and clearance
(preliminary) . . . . . . . .
Take-up reel hub height and
clearance ...... .
Tape reel clutch torque
Tape Drive Mechanism
Capstan interlock switch
Capstan tape guide (final)
Capstan tape guide (preliminary)
Capstan tape guide spring
Forward clutch armature
assembly ....... .
Head tape guide spring .
Photosensor lamp beam (final)
Photosensor lamp beam
(preliminary) . . . . . . . . .
*Registered Trademark of AT&TCo.
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Reverse clutch rotor clearance
Supply and take-up tension arms
torsion springs (preliminary)
Supply tape guide roller
( early design) . . . . . . . . . .
Supply tension arm torsion spring
(final) . . . . . . . . ....
Take-up tension arm torsion
spring (final) ..... .
Tension arm <:am plate .
Tape Transport Assembly
Cartridge holder centering
Counter drive belt tension
Counter drive pulley position .
Counter position ( early design)
Counter position (late design)
Dust cup - counter drive
belt clearance . . . . . .
Dust cup height . . . . .
Record interlock switch
( early design) . . . . . .
Record interlock switch
(late design) ........ .
Record interlock switch push
rod spring (late design)
Top panel gap .
3. LUBRICATION
GENERAL ..
TAPE TRANSPORT
Gear shift mechanism
Motor unit .....
Prepared for American Telephone and Telegraph Company by Teletype Corporation
©1970 by Teletype Corporation
All rights reserved
Printed in U.S.A.
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