Texas Instruments T25 Manuals

Manuals and User Guides for Texas Instruments T25. We have 1 Texas Instruments T25 manual available for free PDF download: Maintenance Manual

Texas Instruments T25 Maintenance Manual (92 pages)

Brand: Texas Instruments | Category: CD/CDR Drive | Size: 6 MB

Table of Contents
4
General Information
9
Description
9
Trident Disk Drives
9
Specifications
10
Metric Conversion Table
11
Special Tools and Test Equipment
11
Major Component Locations
11
Controls and Indicators
12
Operator Control Panel
12
Location of Major Components
12
Maintenance Switches
13
Maintenance Operating Procedures
13
Location of Maintenance Switching
14
Front and Rear Cover Removal
15
Rear Cover Screw Locations
15
Preventive Maintenance
17
Cleaning
17
Preventive Maintenance Routines
17
Read/Write Head Configuration
17
Maintenance Schedule
18
Head Configuration
18
Read/Write Head Problems
18
Routine Head Maintenance
19
Inspecting Installed Heads
19
Read/Write Heads
19
Head Cleaning Materials
20
Cleaning Installed Heads
20
Head Crash Recovery
20
Examples of Head Contamination
20
Dry Load Recovery
21
Cleaning the Disk Pack Area
21
Pack Cleaning Brushes
21
Cleaning and Lubricating the Spindle
21
Spindle Grounding Brush Check
21
Disk Pack Area Components
21
Spindle Drive-Belt Check
22
Cleaning the Intake Air Filter
22
Replacing the Absolute Air Filter
22
Power Supply Checkout
22
Indicator Lamp Replacement
23
De Voltage Check Points
23
Corrective Maintenance
24
Read/Write Head Removal
24
Head Handling, Cleaning, and Inspection
24
Read/Write Head Installation
25
Head Positioning and Mounting Components
25
Servo Head Installation
26
Head Alignment Checkout and Adjustment
26
Head Alignment Dibit Waveforms
28
Power Supply
29
Plug-In Card Locations
30
Card Removal and Replacement
30
Card Cage Removal and Replacement
30
Servosystem Alignment (All Models)
31
PLO Frequency Adjustment
31
Card Cage in Raised Position
31
Servo Control Card Adjustment Point Locations
32
Seek Velocity Adjustment
33
Track Offset Adjustment
33
Position Balance Adjustment (T50 and TSO Only)
33
Read/Write System Alignment (T25 and T50)
34
Balance Adjust Waveform
34
Reference One-Shot Adjustment Waveform
36
Skew One-Shot Display Waveform
36
Data Separator Test and Adjustment Points (TSO)
37
Skew One-Shot Adjustment Waveform
37
Carriage-Actuated Microswitches
38
Heads-Extended Microswitch Checkout and Adjustment
39
Heads-Extended Microswitch Replacement
40
Off-Rack Microswitch Checkout and Adjustment
40
Off-Rack Microswitch Replacement 3-1S
41
Air Shroud Assembly
41
Air Shroud Assembly Removal
41
Absolute Air Filter Replacement 3-1S
41
Cover Lid Spring Adjustment
41
Cover Lid Removal
42
Cover Gasket Replacement
42
Lid-Closed Microswitch Replacement
43
Read/Write Matrix Board Replacement
43
Servo Preamp Board Replacement
43
Relay Assembly Replacement
44
Blower Assembly Replacement
44
Transformer Assembly Replacement
44
Ac Input Control Assembly Replacement
44
Sequence Relay Assembly Component Locations
44
Spindle Drive System
45
Ac Input Control Replacement Component Locations
45
Spindle Drive Component Locations
45
Drive Belt Replacement
46
Grounding Brush Replacement
46
Speed Transducer Clleckout and Adjustment
46
Speed Transducer Gap Limits
46
Speed Transducer Replacement
47
Spindle Lock Assembly Adjustment
47
Spindle Lock Assembly
47
Spindle Lock Assembly Replacement
48
Spindle Drive Motor Replacement
48
Spindle Assembly Replacement
48
Spindle Assembly
48
Head Positioning System
49
Linear Motor Checkout
49
Bobbin Resistance Check Points
49
Velocity Transducer Replacement
50
Velocity Transducer Components and Tool
50
Motor Bobbin Alignment
51
Linear Motor Replacement
52
Carriage and Way Alignment Check
52
Carriage and Way Alignment Procedure
53
Carriage and Way Assembly Replacement
53
Superceded Procedures
55
Indicator Testing
55
Use of Older Exercisers and Head Alignment Meters
55
Head Alignment Using Micrometer-Type Head Alignment Tool
55
Head Alignment Tool in Use
57
Head Alignment Dibit Waveforms
57
Read/Write System Alignment (Early TSO)
58
Data Separator Test and Adjustment Points (Early TSO)
59
Brushes and Brush Drive Assembly
60
Skew One-Shot Display Waveform
60
Brush Replacement
61
Brush Arm Replacement
61
Brush Drive Microswitch Adjustment
61
Brush Motor Assembly Replacement
62
Brush-To-Pack Alignment
62
Carriage and Way Alignment
62
Maintenance Aids
65
Power-Sequencing Malfunctions
65
Read/Write Malfunctions
65
Spindle Malfunctions
66
Interface Malfunctions
66
Positioning Malfunctions
66

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