NEC FD1165 Maintenance Manual

• 5

  Table of Contents

15

Chapter 1 General Information

• 15

  Descri Ption
• 16

  Construction and Features
  • 16

    Base Frame
  • 16

    Spindle Assembly
• 16

  Fdl165 Flexible Disk Drive
  • 17

    DC Direct Drive Spindle Motor
  • 17

    Carriage Read/Write Assembly Heads
  • 17

    Stepping Motor
  • 17

    Head Load Cam Assembly
  • 18

    Pop-Up Feature
  • 18

    Index Sensor
    • 18

      Track Sensor
  • 18

    Write Protect Sensor
  • 18

    Media-In Sensor
  • 18

    Collet Assembly
  • 19

    Display Lamps
  • 19

    Front Panel
  • 19

    Movable Door Handle
  • 19

    Door Lock Solenoid
• 19

  Specifications
• 20

  Fdl165 Specifications

21

Chapter 2 Installation and Operation

• 21

  Preliminary Inspection
• 21

  Unpacking and Repacking
  • 21

    Unpacking Procedure
  • 21

    Repacking Procedure
    • 23

      Preinsta11Ation Inspection
• 23

  Environmental Requirements
  • 23

    Operating Environment
  • 23

    Space and Weight Data
  • 23

    Mounting
• 23

  Unpack I Ng
• 24

  Model Fdl165 Physical Dimensions
• 24

  Vertical Installation
• 24

  Horizontal Installation
• 25

  On-End Installation
• 25

  Air Flow Requirements for Natural Air
• 26

  POWER Supply
  • 26

    Power Supply Specifications
  • 26

    Power Connector
• 26

  Power Connector Part Number
  • 27

    Power Connector Pin Assignments
• 27

  Power Connector Location
• 27

  Pin and Line Assignments for the Power Connector
• 28

  Interface Connection
• 28

  Contact Arrangement for Edge Connector
• 28

  Interface Connector
• 29

  Terminator Resistors
• 29

  Data and Control Interface Contact Assignments
• 30

  Terminator Resistors and Jumper Locations On the PCB
• 31

  Parallel and Series Configurations
• 32

  Drive Identification (DX) Selection
• 32

  Option Selection
  • 32

    Head Load Jumper (HL)
  • 32

    Radial Ready Jumper (RX)
  • 32

    Side Select Jumper (SS)
  • 33

    Write Protect Jumper (PR)
  • 33

    File Unsafe Jumper (FR)
  • 33

    Door Lock Jumpers (DL, DR, DH)
  • 33

    DR Jumper
  • 33

    DL Jumper
  • 33

    DH Jumper
  • 34

    In Use Pins (US)
  • 34

    Read Data Pins (RD)
  • 34

    Busy Lamp Jumpers (BU, BS)
  • 34

    Busy Lamp On During Head Load
• 34

  Door Lock Jumper Combinations
  • 35

    Busy Lamp On During Drive Select
  • 35

    Busy Lamp On During in Use
• 35

  OPERATING the Fdl165
  • 35

    Inserting a Flexible Disk
• 35

  Closing the Door of the Fdl165
  • 36

    Removing a Flexible Disk
• 36

  Display Lamps
  • 36

    Ready Lamp
• 36

  Unlocking the Door and Removing the Flexible Disk
  • 37

    Busy Lamp

39

Chapter 3 Interface Information

• 39

  Basic Operational Description
• 40

  Electrical Interface
  • 40

    Signal Levels
  • 40

    Driver/Receiver Circuits
• 40

  Dr I Ve R /R Ece I Ve R CI R Cui T S
• 40

  Interface Lines
  • 41

    Interface Lines
• 41

  Input Signals
  • 42

    Head Load (HDL)
  • 42

    Step (STP)
  • 42

    Direction Select (DIR)
  • 42

    Side Select (SSL)
• 42

  Step Signal Timing
  • 43

    Write Gate (WGT)
  • 43

    Write Data (WDT)
  • 43

    Low Write Current (LWC)
• 43

  WGT Timing
  • 44

    File Unsafe Reset (FUR)
  • 44

    In Use (USE)
  • 44

    Output Signals
  • 44

    Index (IDX)
• 44

  Write Data Signal Ximing
  • 45

    Track 00 (TKO)
  • 45

    Dual-Sided (TSD)
  • 45

    Ready (ROY)
  • 45

    File Unsafe (FUS)
  • 46

    Read Data (ROT)
  • 46

    Write Protect (PRT)
  • 46

    Disk Change (DCG)
• 46

  Read Data Signal Timing
• 47

  Vfo Interface Signals
  • 47

    Modified Frequency Modulation Mode
  • 47

    VFO Synchronization (SYC)
  • 47

    Standardized Read Data (SRD)
  • 47

    Window (WID)
  • 47

    Disk Change Signal Timing
• 48

  Interface Timing
  • 48

    Power On Sequence
  • 48

    Drive Select
    • 48

      Step and Track 00
• 48

  Step and Track 00 Timing
  • 49

    Access
  • 49

    Write
  • 50

    Read
• 50

  Read Timing
• 51

  Maintenance Tools
• 51

  Maintenance Parts

52

Chapter 4 MAINTENANCE

• 52

  Removal and Replacement Procedures
  • 52

    PCB Removal
• 53

  Collet Assembly Removal, Replacement, and Adjustment
• 53

  Removing the Collet Assembly
• 54

  Replacing the Collet Assembly
• 55

  Head Unload Spring in Relation to Spring Plate
• 55

  Position of the Spring Plate
  • 56

    Carriage Assembly Removal and Replacement
• 57

  Carriage Assembly Position On the Base Frame
  • 58

    Head Load Cam Assembly and Head Load Removal and Replacement
  • 59

    Write Protect Sensor and Media-In Sensor Removal and Replacement
• 59

  Installing the Head Load Cam Assembly
  • 60

    Optical Tachometer Sensor Removal and Replacement
• 60

  Write Protect or Media-In Sensor Connections
• 60

  Installing the Write Protect or Media-In
• 60

  Sensor
  • 61

    Removing the Replacing the Optical
  • 61

    Tachometer Sensor
  • 61

    Figure
• 62

  Removing the Sensor Cable Assembly
  • 63

    Sensor Cable Assembly
• 63

  Installing the Index Sensor
  • 64

    Removing and Replacing the Carbon Brushes
• 64

  Removing a Carbon Brush
  • 65

    Armature Removal
• 65

  Removing the Armature
  • 66

    Spindle Assembly Removal
• 66

  Removing the Spindle Assembly
  • 67

    Front Panel Removal
    • 67

      Picker Rod Removal and Replacement
• 67

  Removing the Front Panel
  • 68

    Pop-Up Assembly Removal and Replacement
• 68

  Adjusting the Picker Rod
  • 69

    Guide Rail Removal
  • 69

    Checking the Operation of the Pop-Up Feature
• 69

  Removing the Pop-Up Assembly and Guide Rail
  • 70

    Door Lock Solenoid Removal and Replacement
• 70

  Removing the Door Lock Solenoid
• 71

  Adjusting the Door Lock Solenoid

73

Chapter 5 ADJUSTMENTS

• 73

  Adj Ust.ments
  • 73

    Diagnostic Tests
• 73

  Location of Diagnostic Test Pins and Test Points
  • 74

    Auto Tap Test
  • 74

    Auto Seek Test
  • 74

    Auto Seek and Auto Tap Test
  • 74

    HEAD UNLOAD Delay
  • 75

    Test Points
  • 75

    Adjustments and Checks Using the Alignment Flexible Disk
• 75

  Test Points and Signals
  • 76

    Head Radial Alignment Check or Adjustment
• 76

  Head Radial Alignment Oscilloscope Settings
• 77

  Head Radial Alignment Waveform
  • 78

    Azimuth Check
• 78

  Adjusting Head Radial Alignment
• 78

  Head Azimuth Oscilloscope Settings
  • 79

    Index Alignment Check or Adjustment
• 79

  Index Alignment Oscilloscope Settings
  • 80

    LED Assembly/Index Assembly Check and Adjustment
• 80

  Index Alignment Waveform
  • 81

    00 Track Sensor Check Or Adjustment
• 81

  Track 00 Signal
  • 82

    Write Protect Sensor Check or Adjustment
  • 82

    Head Load Check
• 83

  Trim Pots
• 83

  Head Load Waveform
• 87

  Fdl165 Flexible Disk Drive
• 87

  G9NYF PCB Assembly
• 87

  Table
  • 87

    Title
  • 87

    List of Illustrations