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- Floppy Disk Drive
- TM848-1E
- Specification And User Manual
Tandon TM848-1E Specification And User Manual
Summary of TM848-1E
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Tn84%5 i 48-2e flexislk 9i8g j%)rives m j' 4 i l [ product spe /ification and user's manual.
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Notice t his document, an d t h e i n f o r m a t io n cont a i ned h erein, is copyrigh t b y t a n don corporation a n d may not be du p l i c ated or r e produced, in w h ole or i n p a r t , w i t h ou t t h e p r io r w r i t t e n a p pr oval of tandon corporation. This document is intended to...
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Tm848-1e, tm848-2e t hin l i n e ™ fl e x i b l e d i sk d r i v e 48 tracks per inch p roduct specification and user's manua l l c l l l d d i 1 co r p or ation chatsworth, california 91311 20320 prairie street o copyright 1983 tandon corporation.
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Contents section number section 1 g e n e r a l d e s c r i p t ion page number title 1.1 1.2 1.3 1.4 introduction scope of the document . . . . . . . . . . . . . . . . . . . . . . . Purpose of the drive major features microprocessor control write protect . D aisy chain capabilit y internal trim e r...
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Section number page number title 3-14 3-14 3-14 3-17 diskettes loading the diskette write protect yab . Diskette handling and storage illustrations figures figure number page number n r 1-1 2-1 2-2 4-o title disk drive d isk drive outline drawi n g +24 volt d. C. Current, configurat ion 1 + 24 volt ...
Page 6: Section 1
Section 1 general description introou ction i nt e l l i g e n t t er m i n a l con t r o l l e r s , m i c r o - computers, word processing systems, data com- munication systems, error logging, program loading, and point-of-sale terminal s. T his document pr ovides required in f or m a t i on in or...
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Internal trim erase accuracy. Compact size activity indicator direct drive, brushless d. C. Motor industry standard interface co mpati b ility diskette lever lock soleno id the reduced size of the drive occupies only o ne-half t h e m o u n t i n g s p ace r e qu i red f o r a conventional drive. T ...
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Light source and a phototransistor, posi- t ioned t o g e n er at e a s i g n a l w h e n a n index hole on the diskette is detected. T he driv e ca n d e t e r m in e i f a s i n g l e - sided o r dou b l e - s i de d d i s k e t t e i s installed. This output si gnal is present at the interface. O...
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Page 10: Section 2
Section 2 prod u c t s p ecifications introduction this section contains the mechanical, electrical, reliabil i ty, and environmental specifications for the tm848-1e and tm848-2e drives. 2.1 m e c hanical specifications figure 2-1 contains the physical dimensions of the drive. 2.2 electrical an d o ...
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6-32 thd thru 4 plcs (2 each side) q5) go o 0 1 2.00 ' (304.8 mm) / 0.149 dia top x 0.156 dia bottom x 0.430 deep 4 plcs 8.00 (203.2 mm) o o o o o) • oo 3.50 (88.9 mm) 0 o p l~ o / 1.20 (30.5 mm) 0.75 ~ ' (19.0 mm) 1.60 (40.6 mm) (25.4 mm) 7. 50 (190.5 mm) 1.650 (41.5 mm) 0.52 (13.2 mm) 8.550 (217.2...
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Table 2-1 electrical and op er at iona l sp ecif i cat ion s media 6 203.20 millim eter, 8-inch ibm in dustr y standard diskette 3 x 10 passes per track 48 tpi, both drives media life (for reference only) tracks per inch tracks per drive tm848-1e tm848-2e track spacing inside track radius both drive...
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Table 2-1 (continued) e lec t r ica l a n d o p e r a t i o n a l s p e c ification s f lux reversals per inch (frpi ) , inside track both drives, side 0 tm848-2e, side 1 unformat ted recording capacity 6,536 frpi 6,816 frpi tm848-1e 0.8 megabyte per disk 1.6 megabytes per disk tm848-2e d. C. Voltag...
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Configured for stepper motor enabled during motor start, 2.25 amps typical surge. C 2 5 u r r e 1.5 1.O t 0.5 n o i 50 100 150 time in milliseconds 200 250 a p s figure 2-2 +24 volt d. C. Current, configuration 1 configured for stepper motor disabled until m otor comes up to speed, 1.8 amps typical ...
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Table 2-2 reliability specifications error rates, maximum, exclusive of external sources, e.G.: electronics, defective and contaminated diskettes soft errors (recoverable) hard errors (nonrecoverable) seek errors 6 o ne in 10 bi t s o ne in 10 b i t s one in 10 seeks 10,000 power-on hours 30 minutes...
Page 16: Section 3
Section 3 operation introdu c t ion 3. R em ove the cardboard shipping insert , and retain for fut ure shipment . 4. E n s ure that the front panel is secure. 5. E n s ure that the circuit board is secure. 6 . E n s ur e t h a t t h e c onnectors are f i r m l y t his section contains i n f o r m a ...
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Dust cover a ll i n t e r f ac e s i g n al s a r e t t l c o m p a t i b l e . Logic true (low) is + 0 . 4 volt m a x i m u m . Logic f alse (high) is + 2 .4 volts mini m u m . The design of an enclosure should incorporate a means to prevent contamination from loose items, e.G., dust, lint, and pap...
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T able 3 - 1 d rive inte r f a c e l i ne s a n d p i n a s s i g n m e n t s ground pin signal 1 l 1 43 45 47 49 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 3 5 7 l a '+8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 6 8 2 4 write current switch motor on control 1 motor on control 2 true ready...
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Note p atterns an d a d j u s t t h e w r i t e d a t a w a v e - form. Alt h ough a value cannot be specified for w rite p r e c ompensation, t a n do n s u g g ests a value of 125 nanoseconds for systems using m fm double density recording format . T m 8 4 8 - 1 e a n d t m 8 4 8 -2 e drives inclu...
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Write p rotect selects the read/write head on side zero, the lower head of th e d r i ve. A t r u e ( l ow) l evel on this lin e selects the read/wr it e h ead on side one, the upper head of the drive. When switch- i ng from one head to th e o t h er, a 100 m i c r o- second delay is required before...
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Typical interface characteristics note t his i s a st r a p p a bl e f e a t u r e w ith th e m o to r control 3 i n p u t signal line. Lines between the controller and the drive have the following characteristics: v , t r u e = + 0.4 volt maximum at i disk change this strappable feature pr ovides a...
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D. C. Power 90 milliseconds minimum valid control output signals $ 5 00 niinoseco n d s m a x im u m drive select side select (tm848-2e only) 100 microsec o n d s m a x imum i direction select 1 microsec o n d minimum 1 microseco n d minimum 13 millisecond 1 microsecond minimum 1 microsecond minimum...
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Supplied, i s a m p p a r t n u m b e r 1 - 4 8 0270-0, using a m p c o n t ac t p a r t n u m b e r 6 0 6 1 9 1-1. Pin assignments are found in table 3-2. T he c h assis s h oul d b e c o n n e cted t o e a r t h ground to ensure proper operation. T ime. Drive select is im pl emented by shortin g o...
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Table 3-3 option patching as shipped trace designator installed not installed option drive select head select head select using drive select power save stepper power from head load line spindle motor control motor control signal, low true motor control signal, high true motor control select ready tr...
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Head select using direction select during a read or writ e operation, the state of the direction select line is undefined. Hence, it may be used to select the desired head. A high enables head 0. A low enables head 1. To incorporate this o ption, etch cut s2 and install sl . S1 s2 x s3 1b 2b 3b 4b x...
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Mol moh mc1 m c2 x mc3 mc4 x x x x m o tor contro l motor control signals are low (true) active. Motor control signals are high (true) active. Motor control selected via j1-4. Motor control selected via j1-6. Motor control selected via j1-8. Motor control selected via j1-24. X o o n l u7 o o m o h 4...
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Uid oll 0 onl m 10 0 ui 3 m 3 0 0 m4 00 dl 0 0 dm op hl oo 0 moh 0 0 mdl owp 0 onp 4 b 0 0 0 d s4 3 b 0 0 0 d s 3 2 b 00 0 d s 2 i b 0 0 0 d s i 0 0 r 0 0 d 0 0 s 3 0 0 s 2 0 0 s i 0 0 d c 0 0 2 s 0 0 t r 0 0 m c 4 0 0 m c 3 0 0 m c 2 0 0 m c i 0 0 i c 0 0 x c 0 p s tpl loj ps + figure 3-4 non-lsi c...
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Ready and true ready (r and tr) when th e r j u m p e r i s i n s t a l l ed, th e r e ady s ignal is avail able at th e i n t e r f ace. When th e tr jumper is in st all ed, the true ready signal is available at the interface. The r j u m p e r i s s t a n d a rd , w h i l e t h e tr jumper i s op ...
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Write current switch (xc and ic) 3 . Rein stall t h e j u m p ers in t h ei r o r i g i n a l configurati on . 4. Power on the drive. T he xc o p t ion a l l ow s t h e h ost c o n t r oller t o switch the wr it e current independently of th e d rive's onboard m i c r oprocessor. It i s f a c t o r ...
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Table 3-4 diagnostic mode of operation dl m4 m3 ml test description of test seek to track 0, an d turn on spindle motor. Th is t e s t seeks the carriage to t r ack 0, and t u rn s on th e spindle motor. It may be used to check the track 0 status. Seek to track 1, and turn on spindle motor. This t e...
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Table 3-4 (continued) diagnostic mode of operation dl m4 m3 ml test description of test 10/a x x x x 14/e 13/d 11/b 12/c monitor the write protect sensor. T his t e st c h e cks t h e w rite protect sensor. The front panel l .E.D. Should tur n on and off by moving a disk, which has the write protect...
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S.O inch sealed protective jacket index hole oxide coated mylar disk spindle access hole liner head aperture write protect notch figure 3-5 reco r d ing media d iskette handling and storag e w hen th e s l o t i s c o v ered w i t h a n o p t i c a l l y o paque, self-adhesive tab, the diskette is w...
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D o not tou c h p r ec i- s ion s u rface w i t h your fingers. To avoid da mag e to the diskette and to your drive, i n sert diskette c a refully until the b a ckstop is encountered. Return the diskette to its j a cket when not in use. Do not write on the jacket with pen or p encil. Us e a f e l t ...
Page 34: A N O N
A n o n corporate offices 20320 prairie street chatsworth, ca 91311 telephone no.: (213) 993-6644 telex no.: 194794 twx no.: 910-494-1721 printed in u.S.A. P/n 179049.001a (t5007a 5-83).