Xerox Century Data Systems T25 Manuals

Manuals and User Guides for Xerox Century Data Systems T25. We have 1 Xerox Century Data Systems T25 manual available for free PDF download: Maintenance Manual

Xerox Century Data Systems T25 Maintenance Manual (87 pages)

Brand: Xerox | Category: CD/CDR Drive | Size: 5 MB

Record of Revisions
5
Table of Contents
7
Section 1 General Information
12
Related Documents
12
Description
12
Specifications
13
Operating Specifications
13
Metric Conversion Table
14
Special Tools and Test Equipment
14
Major Component Locations
14
Controls and Indicators
15
Operator Control Panel
15
Maintenance Switches
15
Disk Pack Handling
16
Operating Controls and Indicators
16
Exerciser Installation and Removal
17
Maintenance Operating Procedures
18
Standalone Grounding Precautions
18
Section 2 Preventive Maintenance
21
Cleaning
21
Preventive Maintenance Routines
21
Read/Write Head Configuration
21
Read/Write Head Problems
22
Bimonthly (60 Day) Preventive Maintenance Schedule
22
Annual Preventive Maintenance Schedule
22
Routine Head Maintenance
23
Inspecting Installed Heads
23
Cleaning Installed Heads
24
Head Crash Recovery
24
Dry Load Recovery
24
Cleaning the Disk Pack Area
25
Pack Cleaning Brushes
25
Cleaning and Lubricating the Spindle
25
Disk Pack Area Components
25
Spindle Grounding Brush Check
26
Spindle Drive Belt Check
26
Cleaning the Intake Air Filter
26
Replacing the Absolute Air Filter
26
Power Supply Checkout
27
Power Supply Voltage Check
27
Indicator Lamp Replacement
28
Section 3 Checks, Adjustments and Replacements
29
Maintenance Notes and Precautions
29
Using the Special Tools
29
Special Tools for the R/W Heads
29
Special Tools for the Positioning System
32
Read/Write I-Lead Removal
33
Head Handling, Cleaning, and Inspection
33
Servo Head Installation
36
Head Alignment Checkout and Adjustment
37
Power Supply
39
Head Alignment Dibit Waveforms
39
Card Cage Assembly
40
Plug-In Card Locations
40
Access to Logic Test Points
41
Card Cage Removal and Replacement
41
Power Supply Cable Dressing
41
Servosystem Alignment (All Models)
42
PLO Frequency Adjustment
42
Plug-In Card Locations
42
Seek Velocity Adjustment
43
Card Cage in Raised Position
43
Track Offset Adjustment
44
Position Balance Adjustment (T50 and T80 Only)
45
Read/Write System Alignment (25 and T50)
45
Read/Write System Alignment (TSO)
45
Balance Adjust Waveform
45
Reference One-Shot Adjustment Waveform
47
Skew One-Shot Display Waveform
47
Read/Write System Alignment (TSO)
48
Data Separator Test and Adjustment Points (TSO)
48
Skew One-Shot Adjustment Waveform
48
Carriage-Actuated Microswitches
49
Heads-Extended Microswitch Checkout and Adjustment
49
(Tso)
49
Heads-Extended Microswitch Replacement
51
Carriage Microswitch Locations
51
Microswitch Adjustment Clearance
51
Off-Rack Microswitch Checkout and Adjustment
52
Off-Rack Microswitch Replacement
52
Air Shroud Assembly
53
Air Shroud Assembly Removal
53
Front and Rear Cover and Bottom Access Cover Removal (Exploded View)
53
Absolute Air Filter Replacement
54
Pack Area Lid Spring Adjustment
54
Pack Area Lid Removal
54
Pack Area Lid Gasket Replacement
54
Air Shroud Filter Recess with Retaining Screws Shown
54
Pack Area Lid Tension Spring Adjustment Nut Location
55
Pack Area Lid Removal
55
Pack Area Lid Removal Using Lid Installation Tool
56
Lid-Open Microswitch Checkout and Adjustment
57
Lid Open Switch and Solid State Buzzer Component Locations
57
Connector J30 Pin Locations
57
Lid-Open Microswitch Replacement
58
Read/Write Matrix Board Replacement
58
Servo Preamp Board Replacement
58
Relay Assembly Replacement
58
Sequence Relay Assembly Component Locations
58
Blower Assembly Replacement
59
Transformer Assembly Replacement
59
Air Duct and Blower Assembly Removal (Exploded View)
59
Ac Input Control Assembly Replacement
60
Spindle Drive System
60
Transformer Assembly and Ac Input Control Replacement (Exploded View)
60
Drive Belt Replacement
61
Grounding Brush Replacement
61
Ac Input Control Assembly (Rear View)
61
Speed Transducer Checkout and Adjustment
62
Spindle Drive Component Locations
62
Speed Transducer Gap Limits
62
Speed Transducer Replacement
63
Spindle Lock Assembly Adjustment
63
Spindle Lock Assembly Replacement
63
Spindle Drive Motor Replacement
63
Spindle Assembly Replacement
64
Spindle Lock Assembly
64
Head Positioning System
65
Linear Motor Bobbin Checkout
65
Spindle Assembly Replacement (Exploded View)
65
Velocity Transducer Replacement
66
Bobbin Resistance Check Points
66
Velocity Transducer Components and Tool
67
Linear Motor Replacement (Exploded View)
67
Motor Bobbin Alignment
68
Bobbin Mounting Screw Locations
68
Linear Motor Bobbin Replacement
69
Bobbin Shims in Place
69
Carriage and Way Alignment Check
70
Calibration of Alignment Tool Indicators
72
Carriage and Way Mounting Bolts Location with Carriage and Way Alignment Tool Installed
73
Carriage and Way Alignment Tool Installed
73
Carriage and Way Assembly Replacement
74
Way Roll Adjustment Tool in Place with Linear Motor Band Held Away
75
Section 4 Superceded Procedures
77
Indicator Testing
77
Head Alignment Using Micrometer-Type Head Alignment Tool
77
Head Alignment Tool in Use
79
Head Alignment Dibit Waveforms
79
Read/Write System Alignment (Early TSO)
80
Tso)
81
Brushes and Brush Drive Assembly
82
Inspecting Disk Cleaning Brushes
82
Skew One-Shot Display Waveform
82
Brush Replacement
83
Brush Drive Component Locations
83
Brush Holder Defects
83
Brush Alignment Check
83
Section 5 Maintenance Aids
85
Bus Definitions
87

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Xerox Century Data Systems T25 Maintenance Manual (87 pages)

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