Tandon TM100-1 Operating And Service Manual Download

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TRACK 0 SWITCH

The Track 0 switch is provided to generate a

logic level at the drive interface, indicating the

read/write head is positioned at the outermost

track.

INDEX SENSOR

An index sensor is provided to generate

electrical pulses at the drive interface

coincident with sensing Index/Sector holes on

the diskette.

ACTIVITY INDICATOR

An activity indicator, located on the front panel,

is automatically illuminated when the drive is

selected.

1.4 FUNCTIONAL DESCRIPTION

The drives are fully self-contained, and require

no operator intervention during normal

operation. Each drive consists of electronics to

generate and interpret control signals, a head

positioning system, a read/write system, and a

spindle drive system.

When the front latch is opened, access is

provided for insertion of a diskette. The diskette

is held in place by plastic guide rails. Its location

is ensured when the diskette is inserted until a

back stop is encountered.

Closing the front latch activates the cone

clamping mechanism, resulting in accurate

centering and clamping of the diskette. The

drive hub is held at a constant speed of 300 RPM

by a servo-controlled D. C. motor. The heads

remain in contact with the recording media

until the front latch is opened.

The heads are positioned over the desired track

by means of a four-phase stepper motor/band

assembly and its associated electronics. This

positioner uses a one-step rotation to cause a one

track linear movement.

Data recovery electronics include a low-level

read amplifier, differentiator, zero crossover

detector, and digitizing circuits. No data

decoding capabilities are provided.

The drive has the following sensors:

1. A Track 0 switch detects when the

head/carriage assembly is positioned at

Track 0.

2. An index/sensor is positioned to generate

a digital signal when an index/sensor

hole on the diskette is detected.

3. A write protect switch disables the write

electronics when a write protect tab is

applied to the diskette.

1.5 PHYSICAL DESCRIPTION

A representative drive is shown in Figure 1-1.

The drive can be mounted in a vertical or

horizontal plane. However, the logic circuit

board must be on the uppermost side when the

drive is mounted horizontally.

The spindle is belt driven by a D. C. motor with

an integral tachometer. The servo control

circuit and tachometer control the speed of the

spindle.

The read/write head assembly is positioned by a

split band positioner mounted to a stepper

motor. The read/write head(s) is a glass-bonded,

ferrite/ceramic structure with a life expectancy

of 20,000 operating hours.

The electronic components of the drive are

mounted on two printed circuit boards. The logic

circuit board is mounted above the chassis. The

spindle motor control circuit board is mounted

at the rear of the chassis. Power and interface

signals are routed through connectors plugged

directly into the logic circuit board.

1-2

Summary of Contents for TM100-1

Page 1: ...O E M OPERATING AND SERVICE MANUAL TM100 1 TM100 2 DISK DRIVES 48 TRACKS PER INCH landon co rpo ratio n 20320 PRAIRIE STREET CHATSWORTH CALIFORNIA 91311 COPYRIGHT 1983 TANDON CORPORATION ...

Page 2: ...n approval of Tandon Corporation This document is intended to provide the user with detailed information adequate for the efficient installation operation and service of the equipment involved However while every effort has been made to keep the information contained herein current and accu rate as of the date of publication no guarantee is given or implied as to its accuracy ...

Page 3: ...rical and Operational Specifications 2 1 2 3 Reliability Specifications 2 1 2 4 Environmental Specifications 2 1 SECTION 3 OPERATION Introduction 3 1 3 1 Unpacking The Drive 3 1 3 2 Preinstallation Checkout 3 1 3 3 Mounting The Drive 3 1 Dust Cover 3 2 Cooling 3 2 3 4 Interface Connections 3 2 Input Control Lines 3 2 Output Control Lines 3 4 Typical Interface Characteristics 3 4 3 5 D C Power 3 5 ...

Page 4: ...le Motor and Spindle Assembly 4 10 Spindle Motor Enable Circuit 4 10 Spindle Motor Control Circuit 4 12 SECTION 5 MAINTENANCE CHECKS AND ADJUSTMENTS Introduction 5 1 5 1 Visual Inspection 5 1 5 2 Equipment Required 5 1 5 3 Power Drive Select Check 5 2 5 4 Write Protect Switch Check and Adjustment 5 3 Write Protect Switch Check 5 3 Write Protect Switch Adjustment 5 3 5 5 Drive Motor Speed Check and...

Page 5: ...Troubleshooting Guide 6 1 6 4 Replacement Procedures 6 5 Tool Requirements 6 7 Drive Belt 6 7 Logic Circuit Board 6 7 Servo Circuit Board 6 9 Cone Lever Assembly 6 10 Cone Assembly 6 13 Activity L E D 6 13 Front Panel 6 16 Guide R ail 6 16 Index Assembly 6 17 Drive Motor Assembly 6 20 Track 0Switch Assembly 6 22 Write Protect Switch Assembly 6 25 Upper Arm Assembly Single Sided Drives Only 6 27 He...

Page 6: ...ive 5 5 5 5 Hub Center Line and Track Locations 5 6 5 6 Cats Eye Patterns 5 7 5 7 Head Module Retaining and Cam Screws 5 8 5 8 Index To Data Pulse 5 10 5 9 Index Sensor s Retaining Screw and Adjustment 5 10 5 10 Optimum Head Azimuth Alignment 5 11 5 11 Head Azimuth Alignment of Acceptable Lower Lim its 5 11 5 12 Head Azimuth Alignment of Acceptable Upper Lim its 5 12 5 13 Track 0Stop 5 13 5 14 Upp...

Page 7: ... and Adjustment Screws 6 27 6 24 Upper Arm Screws 6 28 6 25 Upper Arm Parts 6 29 6 26 Felt Pad On Upper Arm 6 29 6 27 Head Module Assembly 6 30 6 28 Latch Plate Mounting 6 31 TABLES Table Page Number Title Number 2 1 Electrical and Operational Specifications 2 3 2 2 Reliability Specifications 2 4 2 3 Environmental Specifications 2 5 3 1 Drive Interface Lines and Pin Assignments 3 2 3 2 D C Power C...

Page 8: ......

Page 9: ...e interface and typi cal timing characteristics of the TM100 1 and TM100 2 drives In addition there is a theory of operation checks and adjustment procedures troubleshooting guide replacement procedures assembly drawings and schematics 1 2 PURPOSE OF THE DRIVE The TM100 1 and TM100 2 drives are rotating disk memories designed for random access data entry storage and retrieval applications Typical ...

Page 10: ... and its associated electronics This positioner uses a one step rotation to cause a one track linear movement Data recovery electronics include a low level read amplifier differentiator zero crossover detector and digitizing circuits No data decoding capabilities are provided The drive has the following sensors 1 A Track 0 switch detects when the head carriage assembly is positioned at Track 0 2 A...

Page 11: ...FIGURE 1 1 DISK DRIVE ...

Page 12: ......

Page 13: ...l dimensions of the drive are located in Figure 2 1 2 2 ELECTRICAL AND OPERATIONAL SPECIFICATIONS The electrical and operational specifications are located in Table 2 1 2 3 RELIABILITY SPECIFICATIONS The reliability specifications are located in Table 2 2 2 4 ENVIRONMENTAL SPECIFICATIONS The environmental specifications are located in Table 2 3 landon CORPORATION CHATSWORTH CALIFORNIA 91311 179022...

Page 14: ...IVALENTS ARE IN PARENTHESES 2 TOLERANCE ON ALL DIMENSIONS 0 020 INCH UNLESS OTHERWISE SPECIFIED 3 WEIGHT IS APPROXIMATELY 3 POUNDS 1 35 KILOGRAMS FIGURE 2 1 DISK DRIVE OUTLINE DRAWING landon CORPORATION CHATSWORTH CALIFORNIA 91311 179022 001 REV B 2 2 ...

Page 15: ...atency 100milliseconds Instantaneous Speed Variation ISV 3percent Motor Start Time 250milliseconds maximum Motor Stop Time 150milliseconds maximum Seek Time track to track 5milliseconds Head Settling Time 15milliseconds Average Track Access Time including head settling time 75milliseconds Typical Recording Modes FM MFM MMFM Data Transfer Rate 250 000bits per second double density Flux Reversals Pe...

Page 16: ...ak to peak ripple Shipment When prepared for shipment by Tandon the drive meets the requirements of NSTA preshipment test procedure Project 1A TABLE 2 2 RELIABILITY SPECIFICATIONS Error Rates maximum exclusive of external sources e g electronics defective and contaminated diskettes Soft Errors Recoverable One in 109bits Hard Errors Nonrecoverable One in 101 2bits Seek Errors One in 106seeks Mean T...

Page 17: ...g noncondensing media dependent Nonoperating noncondensing Altitude Operating or nonoperating 10 Cto 4 6 C 5 0 Fto 115 F 40 Cto 7 1 C 40 Fto 16 0 F 20 to 80percent 5 to 95percent 152 4meters 500feet below sea level to 15 240meters 50 000feet above sea level CORPORATION CHATSWORTH CALIFORNIA 91311 179022 001 REV B 2 5 ...

Page 18: ......

Page 19: ...anel is secure 5 Ensure the drive belt is in place 6 Manually rotate the drive hub It should rotate freely 7 Ensure both circuit boards are secure 8 Ensure the connectors are firmly seated 3 3 MOUNTING THE DRIVE The drive has been designed to be mounted hori zontally or vertically When mounted horizon tally the logic circuit board side of the drive must be the top side Four 6 32 tapped mounting ho...

Page 20: ... a four pin connector at the rear of the drive The interface description of the connectors and the location of each one is contained in this section Interface lines are located in Table 3 1 D C power connector pin assignments are located in Table 3 2 The signal wire harness should be of the flat ribbon or twisted pair type 26 to 28 gauge conductor compatible with the connector to be used The recom...

Page 21: ...otion is initiated on the trailing edge of the step pulse The time period between consecutive trailing edges of step pulses should be not less than five milliseconds The drive electronics ignore step pulses when one of three conditions exists 1 The write enable is true Qow 2 The direction select is false high and the head is positioned at Track 0 3 The drive is not selected COMPOSITE WRITE DATA Wh...

Page 22: ...s to the control ler that the read write head s are positioned at Track 0 This signal remains true Qow until the heads are moved from Track 0 WRITE PROTECT When the Write Protect line goes true Qow the diskette is write protected and the write electronics are disabled It is recommended the controller not issue a Write command when the Write Protect signal is true Qow When the Write Protect line is...

Page 23: ...ler The chassis should be connected to earth ground to ensure proper operation The conductor should be 16 to 18AWG minimum 3 6 DRIVE ADDRESS AND OPTION PATCHING The drive address and option patching is deter mined by the programmable shunt located at IE on the logic circuit board The DS0 through DS3 jumpers determine the drive address The MX jumper is used only in single drive systems See Figure 3...

Page 24: ...RITE DATA READ DATA 5 MILLISECONDS MINIMUM 200 NANOSECONDS MINIMUM 100 NANOSECONDS MINIMUM 100 NANOSECONDS_Lj MINIMUM 1 u u K i r U H 250 MILLISECONDS MINIMUM 20 MILLISECONDS MAXIMUM 900 MICROSECONDS 390 MICROSECONDS4 1 200 NANOSECONDS MINIMUM I 2100 NANOSECONDS MAXIMUM 4 MICROSECONDS 100 MICROSECONDS MINIMUM 4 MICROSECONDS 4 250 MILLISECONDS MINIMUM H L r u i r n j u I uuir u 8 MICROSECONDS M 1 M...

Page 25: ... motor when the drive is not selected for a savings of approximately 3 8 watts per drive When R50 is used the user must ensure the track location when the drive is reselected SIDE SELECT W1 For use in double sided drives W1 SIDE SELECT For use in single sided drives TM100 1 X For use in double sided drives TM100 2 WRITE FLIP FLOP CONTROL W2 W3 W2 and W3 control the set and preset lines of the writ...

Page 26: ...1 1 __I n DS0 n 15 3 LJ LJ n DS1 n 14 4 LJ I_1 n DS2 I i 13 5 LJ LJ n DS3 n 12 6 i__i i i 1 mx 11 7 LJ LJ p i SPARE j i 10 8 1 1 1 1 HM NOT USED 9 LJ LJ PROGRAMMABLE SHUNT SOCKET 1E FIGURE 3 3 LOGIC BOARD WITH PROGRAMMABLE SHUNTS AND OPTION PATCHING LOCATIONS 3 8 ...

Page 27: ...enter of the diskette may result if the door is closed when the diskette is not properly inserted This prevents reliable recovery o f the recorded data WRITE PROTECT TAB The drive is equipped with a write protect switch assembly This switch operates in conjunction with a diskette that has a slot cut in the protective jacket Figure 3 5 contains the location of the slot When the slot is covered with...

Page 28: ...om a typical source e g motors gen erators or transformers 3 To avoid warping do not store the diskette in direct sunlight 4 Do not use a lead pencil or a ballpoint pen to write on the label Use a felt tipped pen and mark lightly on the label SPINDLE ACCESS HOLE HEAD APERTURE FIGURE 3 4 RECORDING MEDIA ...

Page 29: ...WRITE PROTECT TAB WRITE PROTECT TAB FIGURE 3 5 WRITE PROTECT TAB ...

Page 30: ... DISKETTE AND TO YOUR DRIVE INSERT DISKETTE CAREFULLY UNTIL THE BACKSTOP IS ENCOUNTERED RETURN THE DISKETTE TO ITS JACKET WHEN NOT IN USE KEEP THE DISKETTE AWAY FROM MAG NETIC FIELDS DISKETTES SHOULD BE STORED AT 10 C to 52 C 50 Fto 125 F HANDLE WITH CARE BENDING AND FOLD ING MAY DAMAGE DISKETTE FIGURE 3 6 DISKETTE HANDLING AND STORAGE 3 12 ...

Page 31: ...rinciples of electromagnetics When current flows in a coil of wire it produces a magnetic field The field is confined in a core of magnetic material around which the wire is wound A narrow slot called the air gap is placed in the core located closest to the media It is the magnetic field in the vicinity of the air gap that magnetizes the magnetic medium Fig ure 4 1 When the current is reversed the...

Page 32: ...e head an A C voltage signal which is then amplified and filtered differentiated and digitized Figure 4 3 The comparator and the digitizer circuitry gen erate a one microsecond Read Data pulse corre sponding to each peak of the Read signal Then the composite read data signal is sent to the user system via the Read Data interface line FIGURE 4 3 READ TIMING DIAGRAM 4 2 ...

Page 33: ... causing a high signal on J4 Pin 5 Then it is buffered and inverted to dis able the Write Enable signal It is also gated with drive select producing an output signal on the interface TRACK 0 SWITCH The Track 0 sensor signal is derived from a me chanical switch internal to the drive As the head carriage moves back toward Track 0 the switch is activated between Tracks 0and 3 This low active signal c...

Page 34: ...FIGURE 4 4 INTERCONNECT BLOCK DIAGRAM 4 4 ...

Page 35: ...ive OR gates of IC 5D These gates are con trolled by the Step direction line and by the state of the two flip flop outputs Test Point 8 is low when the carriage is posi tioned at Track 0 and the stepper motor is at Phase 0 When stepping in or out Test Point 12 is a high going pulse for each step of the carriage Table 4 1 STEPPER MOTOR CONTROL The stepper motor control circuits generate the four ph...

Page 36: ...TORED INDEX PULSE 5 VOLTS TRACK 0 TEST POINT 8 OVOLT 5 VOLTS TRACK 0 ADJUSTMENT MONITOR POINT IC 4B PIN 9 TRACKS ON 6 5 4 3 2 1 0 1 2 3 4 5 DISKETTE STEPPER MOTOR 2 3 0 1 2 3 0 1 2 3 0 1 PHASES FIGURE 4 6 TRACK 0 TIMING OVOLT 6 2 4 6 ...

Page 37: ...o the selected head diode matrix to 12 volts D C from the beginning of Write Enable until the end of Internal Write Busy WRITE ERASE CIRCUITS The write electronics consist of a write current source a write waveform generator an erase current source the trim erase control logic and the side select logic Figure 4 7 The signals required to control the data electron ics provided by the host controller...

Page 38: ...N INTERNAL WRITE BUSY N WRITE DATA N WRITE ENABLE NWRITE PROTECT DRIVE SELECT FIGURE 4 7 WRITE DATA CIRCUIT BLOCK DIAGRAM 4 8 ...

Page 39: ...R DRIVE MOTOR STARTS OR 20 MILLISECONDS AFTER LAST STEP PULSE WHICHEVER IS THE LATEST TIME 2 UNSYNCHRONIZED 3 8 5 MILLIAMPERAGE PEAK TO PEAK 4 4 MICROSECONDS MINIMUM 8 MICROSECONDS MAXIMUM FIGURE 4 8 WRITE OPERATION TIMING DIAGRAM 4 9 ...

Page 40: ... head s The drive must be in a ready condition before reading can begin This ready condition must he established by the user system In addition to the requirements established in this section a 100microsecond delay must exist from the trail ing edge of the Trim Erase signal to allow the read amplifier to settle after the transient caused by the Read Only circuit returning to the Read mode The outp...

Page 41: ...PLIFIER AND SIDE SELECT AND LINEAR CIRCUITS PHASE FILTER TEST POINT 1 TEST POINT 2 TEST POINT 3 U ZERO CROSSOVER DIFFERENTIATOR DETECTOR f COMPARATOR TIME DOMAIN FILTER TEST POINT 4 DIGITIZER DATA OUTPUT DRIVE SELECT FIGURE 4 9 READ CIRCUIT BLOCK DIAGRAM ...

Page 42: ... con trolled by an integrated regulator circuit when the spindle motor is enabled The potentiator provides an adjustable D C voltage reference to the regulator circuit for spindle speed adjust ment The tachometer signal provides feedback from the motor via Pins 1and 2of the servo cir cuit board to maintain a constant speed of 300 RPM This signal is 12volts A C Ji 4 12 ...

Page 43: ...ation in Section 4for circuit descriptions Test point loca tion is illustrated in Figure 5 1 5 1 VISUAL INSPECTION Before applying power to the drive or doing any checks or adjustments visually inspect the drive 1 Check for loose or missing hardware 2 Ensure the front latch opens and closes The head arm raises when the door is opened 3 Ensure the front panel is secure 4 Manually rotate the drive h...

Page 44: ...rewdriver 10 An 0 050 inchAllen wrench 11 A flat blade screwdriver 12 A 5 64 inchAllen wrench Test equipment must be in calibration This may be verified by observing the calibration due date on the calibration sticker affixed to the equipment 5 3 POWER DRIVE SELECT CHECK 13 A 7 64 inchAllen wrench 5 2 The drive select check verifies the activity L E D can be illuminated and power is supplied ...

Page 45: ...nuity with an ohmmeter 2 With a nonwrite protected diskette in serted verify there is continuity between the two wires of Plug 8or there is a non write protected output to the exerciser i e a high at Jl Pin 28 3 With a write protected diskette inserted verify there is no continuity between the two wires of Plug 8 or that there is a write protect true output to the control ler or exerciser i e a lo...

Page 46: ... speed disk is stationary Figures 5 3and 5 4 5 6 RADIAL TRACK ALIGNMENT CHECK AND ADJUSTMENT The Radial Track alignment procedure locates the read write head at the proper radial distance on the hub center line ensuring the track loca tion is accurate Figure 5 5 Adjustment is necessary only after servicing or if diskette in terchange problems are suspected If the Cats Eye pattern cannot be verifie...

Page 47: ...FIGURE 5 3 LOCATION OF R4 SPEED CONTROL POTENTIOMETER OUTER BARS ON BACK INNER BARS ON TIMING DISK TIMING RING USED FOR 50 Hz FIGURE 5 4 BOTTOM VIEW OF DRIVE 5 5 ...

Page 48: ...Point 7 positive edge Adjust amplitude for at least four divi sions on the oscilloscope A C coupled 2 Apply power to the drive NOTE The Track 16 radius is 1 9167 inches from the center of the hub Other track locations are comput ed based upon 48TPI 3 Select the drive 4 Insert a certified alignment diskette Dysan Number 224 2A into the drive 5 Select Head 0 the lower head 6 Read Track 16 for Radial...

Page 49: ... pattern N O TE 11 Step the drive to Track 26 or higher then step it back to Track 16 12 Verify the Cats Eye pattern 13 Switch to Head 1 the upper head 14 Read Track 16to verify the alignment of the upper head if applicable 15 Verify the Cats Eye pattern EVEN AMPLITUDE 100 LEFT 80 OF RIGHT LEFT 40 OF RIGHT RIGHT 80 OF LEFT RIGHT 60 OF LEFT RIGHT 40 OF LEFT FIGURE 5 6 CATS EYE PATTERNS 5 7 ...

Page 50: ...acceptable 21 If any check does not verify the module must be adjusted RADIAL TRACK ALIGNMENT ADJUSTMENT 1 Loosen the three module retaining screws 1 2 tum with a 7 64 inch Allen wrench Two of the screws are located un derneath the module and one is located at the rear of the module Figure 5 7 2 Turn the cam screw counterclockwise 3 Observe the Cats Eye pattern of the head farthest out of alignmen...

Page 51: ...ive s motor 5 Insert an alignment diskette 6 Seek the carriage to Track 1 7 Select Head 0 8 Read the trigger point to the start of the first data pulse width Figure 5 8 9 For double sided drives if Head 0 the lower head meets the tolerance check the upper head NOTE Head 1 should meet the same tolerance 10 If either head does not meet the tolerance adjust the index sensor 1 1 Recheck both indexes a...

Page 52: ...N O TE The tolerance is 200 100 microseconds TIME SCALE 50 MICROSECONDS PfeR DIVISION FIGURE 5 8 INDEX TO DATA PULSE BACK FIGURE 5 9 INDEX SENSOR S RETAINING SCREW AND ADJUSTMENT 5 10 ...

Page 53: ...rnal Trigger Test Point 7 positive edge Adjust amplitude for at least four divi sions on the oscilloscope 2 Seek to Track 34 3 Select Head 0 and observe the third pulse burst on the oscilloscope 4 Verify the head azimuth is no greater than 18 minutes by comparing the third set of pulse burst to those in Fig ures 5 10 5 11 and 5 12 5 Select Head 1 and verify the head azi muth Figure 5 10 depicts an...

Page 54: ...is required 14 If any of these checks is unsatisfactory adjust the Track 0switch TRACK 0 SWITCH CHECK TRACK 0 SWITCH ADJUSTMENT 1 Set up the oscilloscope Channel A Test Point 1 Channel B Test Point 2 Ground Test Point 10 Read Differentially A plus B B inverted Time Base 20milliseconds per division External Trigger Test Point 7 positive edge Vertical Display 0 1volt per division 2 Apply power to th...

Page 55: ...llen wrench or a number one Phillips screwdriver Figure 5 13 6 Step the carriage to Track 0 and observe the waveform 7 Slowly turn the screw clockwise until the output amplitude begins to decrease on the oscilloscope 8 Turn it counterclockwise until the ampli tude stops increasing 9 Turn it counterclockwise an additional 1 8turn 5 11 HEAD OUTPUT CHECK The head output check measures the head s outp...

Page 56: ...rotate concentrically This check and adjustment should be made whenever the cone lever assembly has been removed or re placed If the cone centering cannot be adjusted verify the measurement with a second diskette otherwise refer to the troubleshooting guide 1 Set up the oscilloscope Channel A Test Point 1 Channel B Test Point 2 Vertical Amplitude 100millivolts per division Ground Test Point 10 Rea...

Page 57: ... 7 positive edge 4 Apply power to the drive 5 Select the drive 6 Insert a nonwrite protected diskette 7 Write a IF pattern on Track 34 8 Observe the output waveform voltage 9 With a gram gauge carefully apply fif teen grams pressure to the upper arm NOTE Fifteen grams is about the weight of a quarter 1 0 If the output shown on the oscilloscope increases by more than ten percent adjust the complian...

Page 58: ...CARRIAGE ASSEMBLY FIGURE 5 14 UPPER ARM AND SCREWS ...

Page 59: ...ied diskettes Review Section 3 to ensure correct configuration of the drive 6 2 SOFT ERRORS Soft errors can be caused by airborne contami nants random electrical noise excessive temperature and other external causes To cor rect soft errors 1 Ensure proper grounding between power supply drive and host system 2 Verify there is no random electrical noise to the drive 3 Verify there is no radiated noi...

Page 60: ... out of tolerance or not turning Drive Motor not turning Verify interface Motor On signal Connectors loose or missing Check Connectors P13 P20 and P21 Drive belt loose or missing Replace drive belt Defective Servo circuit board Replace Servo circuit board Defective Logic circuit board Replace Logic circuit board Defective drive motor Replace Drive Motor Assembly Will not seek or restore Interface ...

Page 61: ...rotect switch operation Defective write logic Replace Logic circuit board Defective head s Replace Module Assembly Will not read Interface incorrect Verify select is true and write enable is false Alignment off Verify Cats Eye lobes index burst and Track 0switch adjustment Defective read electronics Replace Logic circuit board Defective head s Replace Module Assembly Front panel L E D inoperative ...

Page 62: ...3 Faulty Activity L E D Replace Activity L E D Faulty Logic circuit board Replace Logic circuit board Fails Write Protect switch check and adjustment Defective Write Protect switch Broken Write Protect lever Write Protect switch out of adjustment Replace Write Protect switch Replace left rail Adjust Write Protect switch Fails drive motor speed check and adjustment See Spindle Speed Out of Toleranc...

Page 63: ...ot Read Compliance misadjlisted Perform compliance check and adjustment Fails cone centering check Defective diskette Replace diskette Cone Lever Assembly misadjusted See Cone Lever Assembly replacement procedure Cone faulty Replace Cone Assembly Fails compliance check and adjustment Defective diskette Head load pad damaged or worn Replace diskette Replace Upper Arm Assembly 6 4 REPLACEMENT PROCED...

Page 64: ...RACK 0 SWITCH HEAD OUTPUT CONE CENTERING COMPLIANCE Drive Belt X Logic Circuit Board X X X Servo Circuit Board X Cone Lever Assembly X X Cone Assembly X X Activity L E D X Front Panel X X Guide Rail X X Index Assembly X Drive Motor Assembly X Track 0Switch Assembly X X Write Protect Switch X Upper Arm Assembly X X Head Module Assembly X X X X X X Latch Plate Assembly X Single sided drives only 6 6...

Page 65: ...VE BELT REMOVAL 1 Turn the drive over spindle facing up 2 Remove the drive belt 1 With the shiny side inward loop the new drive belt onto the small flanged motor pulley 2 While turning the spindle put the belt on the large spindle motor pulley Figure 6 1 LOGIC CIRCUIT BOARD REMOVAL 1 Remove all connectors from the circuit board Figure 6 2 Note their location 2 Remove the two circuit board mounting...

Page 66: ...FIGURE 6 2 LOGIC CIRCUIT BOARD MOUNTING 6 8 ...

Page 67: ...3 Install the two mounting screws attach ing the circuit board to the rails 4 Plug in all the connectors ensuring they are in the proper slots REMOVAL 1 Detach connectors P20 and P21 from the circuit board Figure 6 3 2 Remove the mounting screws and spacers attaching the circuit board to the chassis NOTE Save all spacers and mounting screws 3 Remove the circuit board from the chassis FIGURE 6 3 SE...

Page 68: ...rew ensure it is installed at the bottommost location from which it was removed 5 Plug Connectors P21 into the bottom right hand comer of the circuit board plug in P20 above it 6 Check the drive motor s speed CONE LEVER ASSEMBLY REMOVAL 1 Remove the Logic circuit board 2 Open the front latch 3 Cut the tie wrap attaching the top index cables to the assembly Figure 6 4 4 Remove the mounting screw at...

Page 69: ...mbly and slide it toward the rear of the drive and slide the front latch out of its tracks 11 Slide the assembly toward the rear of the drive tilting it until the upper arm finger is free 12 Remove the assembly from the drive REPLACEMENT 1 Route the head cable up through the large open area of the Cone Lever assembly 2 Position the assembly to ensure the upper arm finger is in place Place the fron...

Page 70: ...assembly Figure 6 5 8 Close the front latch of the drive to engage cone and hub 9 Ensure the cone is centered in the shaft hole Figure 6 6 10 Tighten the two mounting screws attach ing the assembly to the chassis 11 Ensure there is clearance between the E ring and the cone lever The cone shaft E ring should be between 0 010 and 0 025 inch above the cone level when the assembly is in the latched po...

Page 71: ...rcuit board 2 Cut the tie wraps attaching the Activity L E D and the Write Protect Switch As sembly to the chassis Figure 6 8 3 Remove the retaining collar holding the Activity L E D to the grommet using needle nose pliers gently pulling the retaining collar away from the front panel Figure 6 9 4 Push out the Activity L E D toward the rear of the drive 5 Remove the Activity L E D from the drive RE...

Page 72: ...E RIN G C O N E SH A FT FIGURE 6 7 CONE S COMPONENT PARTS 6 14 ...

Page 73: ...FIGURE 6 8 ACTIVITY L E D CABLE HARNESSING FIGURE 6 9 ACTIVITY L E D ASSEMBLY RETAINING COLLAR AND GROMMET 6 15 ...

Page 74: ...T 1 Place the front latch in its tracks on the front panel and place the new front panel on the locating tabs 2 Reinstall the two mounting screws at taching the front panel to the chassis 3 Reinstall the Activity L E D 4 Install new bushings on both right and left sides of the front panel over the locating tabs 5 Put a small drop of glue e g Permabond or Superglue on top of each bushing 6 Reinstal...

Page 75: ...ot enlarge the hole in the chassis REPLACEMENT 1 Evenly press the new guide rail into the chassis locating tab holes Figure 6 12 2 Replace the front panel 3 If the right guide rail has been replaced reloop the head cable s over the two guide rail posts Figure 6 12 4 If the left guide rail has been replaced verify the Write Protect Switch and its adjustment 5 Reinstall the Logic circuit board INDEX...

Page 76: ...FIGURE 6 13 INDEX EMITTER SENSOR S MOUNTING AND CABLE HARNESSING 6 18 ...

Page 77: ...nsor holder in the top of the chassis and while holding the drive upside down install the mounting screw 3 Smooth out the cable harness 4 Attach the index emitter cable harness to the Cone Lever Assembly 5 Attach the index detector cable harness to the chassis 6 Bundle the wires behind the drive motor and attach a tie wrap to the cable harness Figure 6 15 7 Insert a diskette into the drive 8 Ensur...

Page 78: ...taching the Drive Motor Assembly to the chassis Figure 6 16 1 Remove the Logic circuit board NOTE 2 Cut the cable harness tie wrap Connector P21 Figure 6 15 Save the mounting screws and shoulder washers 3 Detach Connector P21 from the Servo circuit board 6 Remove the assembly FIGURE 6 15 CABLE HARNESS 6 20 ...

Page 79: ...FIGURE 6 16 DRIVE MOTOR HARNESSING AND MOUNTING 6 21 ...

Page 80: ... 4 Reinstall the drive belt Figure 6 1 5 Plug Connector P21into the Servo circuit board 6 Attach a tie wrap to the bundle of wires located behind the drive motor 7 Reinstall the Logic circuit board 8 Adjust the drive motor s speed TRACK 0 SWITCH ASSEMBLY REMOVAL 1 Remove the Logic circuit board 2 Cut the tie wraps holding the bundle of cables at the back of the drive motor and attach the cables to...

Page 81: ... drive 2 Push this assembly toward the rear of the drive and slip the bracket into the adjustment screw Figure 6 19 3 Ensure there are no cables underneath the assembly 4 Install the mounting screw Figure 6 20 attaching the assembly to the bottom of the chassis 5 Attach a tie wrap to the cable harness at the bottom of the chassis 6 Tie wrap the bundle of cables located at the back of the drive mot...

Page 82: ...FIGURE 6 19 TRACK 0 ADJUSTMENT SCREW 6 24 ...

Page 83: ...y s cables to the bundle of wires at the back of the drive motor Figure 6 22 5 Remove the assembly REPLACEMENT 1 Install the new assembly using its mounting adjustment screws 2 Tie wrap the bundle of wires at the back of the drive motor 3 Attach the write protect cable harness to the chassis 4 Ensure the write protect arm causes the switch to make a clicking noise when the arm is pushed down Figur...

Page 84: ...FIGURE 6 21 WRITE PROTECT MOUNTING ADJUSTMENT SCREWS FIGURE 6 22 WRITE PROTECT CABLE HARNESSING 6 26 ...

Page 85: ...ing the screw holes 2 Carefully replace the spring and spring retainer ensuring the spring is seated on both ends and align the screw holes 3 Reinstall but do not completely tighten the screws 4 Visually align the felt pad with the head Figure 6 26 5 Tighten the two screws 6 After inserting a diskette into the drive visually check to ensure the felt pad clears the disk when the front door is opene...

Page 86: ...FIGURE 6 24 UPPER ARM SCREWS 6 28 ...

Page 87: ...MOUNTING FIGURE 6 26 FELT PAD ON UPPER ARM 6 29 ...

Page 88: ... casting not the heads 1 Install the new assembly by placing its left side against the module spring and compressing the module spring to seat the other side of the assembly Ensure the module is seated around the adjust ment cam screw 2 With a 7 64 inch Allen wrench reinstall the flat washers and mounting screws 3 Install the Cone Lever Assembly 4 Attach the head cable s to the right rail 5 Attach...

Page 89: ... assembly into its tracks 2 Close the front latch 3 Still holding the Cone Lever Assembly down place the latch inhibitor on top of the assembly 4 Install but do not tighten the mounting screws attaching the latch inhibitor and the Latch Plate Assembly to the Cone Lever Assembly 5 Open the front latch 6 Insert a diskette into the drive 7 Close the front latch 8 Align the latch inhibitor so it just ...

Page 90: ......

Page 91: ...mbly 172027 002 Front Panel with Bushings 171041 001 Index Assembly 171036 001 Logic Circuit Board Standard 175003 001 Cone Assembly 1 Piece 172231 001 Left Hand Guide Rail Aluminum Chassis 171002 001 Cone Lever Assembly 171014 001 Drive Motor 171103 001 Upper Arm 171113 001 Module DSR Aluminum Chassis 171113 002 Module SSR Aluminum Chassis 973530 151 Resistor Pack 171147 002 Servo Circuit Board S...

Page 92: ...A 2 ...

Page 93: ...A 3 ...

Page 94: ......

Page 95: ...and circuit board drawings for the TM100 1 and TM100 2 drives Drawing Page Number Title Number 180010 REV K Logic Circuit Board Assembly Drawing B 2 B 3 180011 REVF Logic Circuit Board Schematic B 4 B 5 B 6 180000 REV G Servo Circuit Board Assembly Drawing B 7 180001 REVF Servo Circuit Board Schematic B 8 B l ...

Page 96: ... RD R E SIST O R PA C K A G E 2 F TO BE 9 6 5 MAX 2 TH IS A SSEM B LY SH A LL BE MADE FROM P C B 1 8 0 0 1 2 0 0 1 REV E 1 A S SE M B L E PER STA N D A R D M A NUFACTURING M ETH O D S M I H I 0 0 0 9 J3 mxiiiiiuRi n r n r a i V W 1 1 1 1 1 1 1M l o S o C o 0 o o o 3 1 1 1 A l üoüoüo o 8 QL w O0 EZ3 0 o W 4 o 0 ö O O O offi y b o O C25 R55 O V PTTT o i O O C25 2 n o n V t r V O S I 8 o U O 2C 1 10 ...

Page 97: ... y 0 L O 2C 1 N I u o _______________ _ o o o b c S 0 5 o L 0 40 lo 0 33 1 i fies t _ o v O O C R I7 O R2I O o R56 r R57 O O G D D D D G D O G G G G G G R5I r U o C27 O OCI5 O O C i 0 0 1 h o O B c 1 D e R23 R 5p t Ho o mS CIS CI4 o o ergo 5 94 rv W o te q o vre o cri8 a a a a a a a oc1 O W 2 o S O A C N Ä L _ COMPONENT SIDE 0 REW ORK IN S T R U C T IO N S FO R 0 0 6 REW ORK NUM BER REW ORK D E SC...

Page 98: ... R74 WH WI2 WI3 001 USE USE OMIT USE OMIT USE OMIT USE OMIT OMIT OMIT 002 0 0 3 USE USE OMIT OMIT USE USE OMIT USE OMIT OMIT OMIT 0 0 4 USE USE OMIT USE OMIT OMIT USE USE USE USE OMIT 0 0 5 OMIT OMIT USE USE OMIT USE OMIT OMIT OMIT OMIT OMIT 0 0 6 USE USE OMIT USE OMIT USE OMIT USE OMIT O M I T USE 0 0 7 008 0 0 9 010 USE USE OMIT USE OMIT USE OMIT USE OMIT OMIT OMIT 6 J FO R O PTIO N JU M PE R CO...

Page 99: ...l a n d e i n CORPORATION LOGIC CIRCUIT BOARD SCHEMATIC 180011 REV F SHEET 2 OF 3 B 5 ...

Page 100: ... SV SHEET 3 OF 3 B 6 ...

Page 101: ...003 MOTOR START OPTION PLUS ISOLATED GND 180000 004 GND 4 VENDOR TO MARK BOARD PERMANENTLY WITH VENDOR IDENTIFIER 3 TRANSISTOR MOUNTING TORQUE TO 4 7 INCH LBS 10 f i l MARK VERSION NUMBER REVISION LETTER AND DATE CODE IN AREA SHOWN ON COMPONENT SIDE 1 ASSEMBLE PER STANDARD MANUFACTURING METHODS ...

Page 102: ...M 7 DETAIL A V A S C A L E NONE la n d H r i CORPORATION SERVO CIRCUIT BOARD ASSEMBLY DRAWING 180000 XXX REV G SHEET 1 OF 1 B 7 ...

Page 103: ...L E S T H U S THEY CANNOT BE USED SIM ULTANEOUSLY REFER TO TABLE I FOR USAGE FO R PART NO USAGE O F C O M PO N E N T S A FFE C TE D BY V ERSIO N NR SE E TABLE I 3 D IO D E S ARE IN 4 4 4 6 2 1 R E S IS T O R S ARE 1 8 W 1 R E SIST O R VALUES ARE IN O H M S 5 1 4 W ...

Page 104: ...1 ce 1 C K t It 1 k n O 7 K IU C 1t o o c o 0 0 1 MqpK tqAfcf opTi U96 U 6 US us PMIf Of Ut Ut r 1t c o o c o o t 1aApmu OMIJ PMif PMIJ PMIJ l t 6 PMq Uf OMff 1 0 0 0 0 0 0 M otc lA T fu i o i t p 4P 1 Ut U S e 4 t j U ft PMIJ IK W C O O O O O A I401ATip4 PM f 0Vllf PMIf C IM J O t b _ UL PHtf PMI Ia riel a n CORPORATION SERVO CIRCUIT BOARD SCHEMATIC 180001 REV F SHEET 1 OF 1 B 8 ...

Page 105: ...o landon 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 179022 001B T5012B 7 83 c ...

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Tandon TM100-1, Operating And Service Manual

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