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Summary of Contents for Sams TANDON TM100-2
- Page 1 S M S 08966 DISK DRIVE: TANDON® MODEL TM100-2/2A TECHNICAL SERVICE DATA FOR YOUR DISK DRIVE...
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Page 2: Test Equipment And Tools
. 1986 Howard W Sams & Co., Inc. r e p la c e m e n t p a rt. The n u m b e rs of th ese ports ha v e b e e n c o m p iled fro m in fo rm a tio n fu rn is h e d to H o w a rd W . -
Page 3: Interconnecting Diagram
PRELIMINARY SERVICE CHECKS (Continued) TO DRIVE TO PI 3 MOTOR INTERCONNECTING DIAGRAM... -
Page 4: Main Board
PRELIMINARY SERVICE CHECKS (Continued) MAIN BOARD... - Page 5 PRELIMINARY SERVICE CHECKS (Continued) HEAD POSITION MOTOR DRIVE MOTOR TRACK 0 W RITE PROTECT MECHANICAL-TOP VIEW...
- Page 6 PRELIMINARY SERVICE CHECKS (Continued) "O SERVO BOARD...
- Page 7 PRELIMINARY SERVICE CHECKS (Continued) ALIGNMENT one screw on the top next to the Radial Head Alignment EQUIPMENT REQUIRED screw, see Disk Drive Mechanical - Top View Photo. Turn A test program or a Disk Drive Tester is required which will the Radial Head Alignment Screw until the lobes are within turn On the Disk Drive and step the head to the track 80% of each other and retighten the three retaining screws.
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Page 8: Preventative Maintenance
PRELIMINARY SERVICE CHECKS (Continued) PREVENTATIVE MAINTENANCE ENVIRONMENT Computers perform best in a clean, cool area that is below 80 degrees Fahrenheit and free of dust and smoke particles. Even though home Computers are not affected by cigarette smoke as much as commercial Computers are affected, it is better to maintain a smoke-free area around the Computer. - Page 9 Q1A MOTOR D R IV E 0 2 A MOTOR DRIVE J1A /P 2A A PHOTOFACT STANDARD NOTATION SCHEMATIC TANDON Q Q G S E Q 3 3 with MAIN BOARD MAIN BOARD MODEL TM100-2/2A © Howard W. Sams & Co., Inc. 1986...
- Page 10 MAIN BOARD A H o w a r d W . S a m t P h o to i r c u i r a c e...
- Page 11 R IV f t i a MAIN BOARD A Howard W. Sams G ™ Photo race...
- Page 12 MAIN BOARD GridTracs LOCATION GUIDE J-10 £-12 A -5 F -1 1 TP 7 ■3-11 G-10 G-11 G-10 D-10 J-10 D-10 1-11 D-11 D-10 D-11 Cl 2 F-10 E-11 Cl 3 F-1? Cl 5 Cl 6 G-11 Cl 7 G-11 Cl 8 H-11 E-12...
- Page 13 SERVO BOARD Photo A Howard W. S a m t i r c u i r a c e...
- Page 14 S W 2 DR IVE M OTOR TR ACK 0 HEAD 1 HEAD 0 HEAD PO S ITIO N M OTOR C R 26 IN D E X DETECTOR SW 1 W R IT E PROTECT C R 27 A C T IV IT Y MECHANICAL-TOP VIEW...
- Page 15 PARTS LIST AND DESCRIPTION (Continued) When ordering parts, state Model, Part Number, and Description SEMICONDUCTORS (Select replacement transistor for best results) REPLACEMENT DATA ITEM TYPE MFGR. PART No. WORKMAN ZENITH NOTES PART No. PART No. PART No. PART No. PART No. ECG123AP SK3854/123AP WEP736/123A...
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Page 16: Wiring Data
PARTS LIST AND DESCRIPTION (Continued) When ordering parts, state Model, Part Number, and Description COILS (RF-IF) ITEM M FG R . ITEM M F G R . F U N C T IO N F U N C T IO N N o . - Page 17 ALIGNMENT EQUIPMENT REQUIRED one screw on the top next to the Radial Head Alignment screw, see Disk Drive Mechanical - Top View Photo. Turn A test program or a Disk Drive Tester is required which will the Radial Head Alignment Screw until the lobes are within turn On the Disk Drive and step the head to the track 80% of each other and retighten the three retaining screws.
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Page 18: Troubleshooting
TEST EQUIPMENT Test Equipment listed by Manufacturer illustrates typical or equivalent equipment used by SAMS' Engineers to obtain measurements and is compatible with most types used by field service technicians. TEST EQUIPMENT (COMPUTERFACTS) B & K Precision Sencore Simpson Equipment Name Equipment No. - Page 19 TROUBLESHOOTING (Continued) WILL NOT WRITE HEAD CLEANING Verify that the write protect circuit is functioning properly Use a non-abrasive cleaning diskette to clean the heads. If by inserting a diskette that is not write protected into the the Disk Drive is a single sided drive, use a single sided Disk Drive and check for a high logic reading at pin 10 of IC cleaning diskette to avoid damaging the head pad.
- Page 20 If the pulses are missing, check for pulses at pin 1 of IC 2E. If the pulses are present, check S C 2E by 10 OPEN "B:SAMS.DAT" FOR OUTPUT AS #1 substitution. If the pulses are missing, use a scope to 20 FOR X = 1 TO 300 check for .75V peak to peak pulses at the base of Switch...
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Page 21: Ipower Supply
Waveforms and voltages taken from ground, unless noted was used. Diskette was not write protected. otherwise. 10 OPEN "B:SAMS.DAT" FOR OUTPUT AS #1 Waveforms taken with triggered scope and Sweep/Time 20 FOR X = 1 TO 300 switch in Calibrate position, scope input set for DC 30 PRINT #1, "THIS IS A TEST"... -
Page 22: Logic Chart
LOGIC CHART Logic Probe Display L = Low H = High P = Pulse * =Open (No light On) Probe indicates L when Head is on track 00 and H when off track 00. Probe indicates P when Head Position Motor is operating. -
Page 24: Safety Precautions
SAFETY PRECAUTIONS Use an isolation transformer for servicing. Maintain AC line voltage at rated input. Remove AC power from the Disk Drive before servicing or installing electrostatically sensitive devices. Examples of typical ES devices are integrated circuits and semiconductor "chip" components. Use extreme caution when handling the printed circuit boards. - Page 25 «. •node) mould be s.nvur to *<gu'e ' Tn« «e*ero"ns on me due lines should oe sinvijr to r.gu'e is o registered trademark of Howard W. Sams & Co., Inc. ircui race COMPUTERFACTS and are trademarks of Howard W. Soms 8. Co.. Inc.
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