Other conditions will es require the operator to rewind the tape by pressing the REWIND pushbutton on the operator control panel. When the beginning -of -tape marker reaches the photosense unit, the rewind will be ended, and the tape unit will advance the tape until the reflective marker is at the photo- sense head.
In the event of power failure while the system is on line , the buffer arms will extend and tension on the tape will be relaxed, preventing any possible tape damage.
When power has been restored, tape system operations may be resumed by first taking up the tape slack and then pressing the LOAD pushbutton.
Material covered includes: • Installation of the tape system in system cabinets • Checkout procedures and requirements • Interconnection of the tape and data systems • Principles of design and operation • Module replacement and adjustment. LETTER DESCRIPTION DATE APPROVAL A Original publication 5/70 B To reflect basic product re-design 9/70 C Update all sections with particular emphasis on Section VI and Appendix B 10/71 D Update all Sections 2/72 E Changed pages - Title Page, i V, IV-3, IV-9, VI-30, VI-31, VI-34, VI-39, VI-44, VI-47, VI-50, VI-58, VI-59, VI-60, VI-61, updated drawings to latest revision 6/72 F Changed pages - Title Page, vii, II-7, IV-2, A-3. Deleted pages - 1-6, 1-7 Changed pgs : 1-4, VI-61, Updated 12/73 Appendixes A & B v TABLE OF CONTENTS Page SECTION I.
GENERAL DESCRIPTION I-l 1 "D n ., , i- ;;e;~ if-,,;,.;.;,,;!?
To thread tape on 37,5 ips or 45 ips Mod 10 systems (Figure 3) , follow the previously described procedure for 25 ips units, except that the tape must be led across both rollers of each buffer arm guide assembly.
II - 4 At the conclusion of a tape system operation with the computer, or at other times when it is necessary, the tape will be rewound onto the supply reels Norm-aily, the computer or data system will issue a re- wind command without operator participation.
The tape will be pulled through the tape path and returned to the supply reel.
The tape reel may then be removed from the machine by pressing the knob toggle to the unlocked position.
Material for these sections has been scaled to the and training of computer and off-line system operators. LETTER DESCRIPTION DATE APPROVAL H Changed pages - Title page; 6/73 V through xi Revised pages - I-l, 1-3, II-l through II-9.
Sections IV and following are addressed to the engineer responsible for setting up and maintaining this equipment on site. 10/72 G Changed Title Page, revised pages: II-3, II-6, II-8, IV-2, IV-9, V-18 and VI-32. III-1 through I I 1-4, IV-1 through IV-18, VI-40, VI-42 Appendix B: revised list of drawings; updated drawings to latest revisions.
It is accessible only when the tape unit is swung open for service.