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PS280
Tektronix PS280 Service & Reference Guide
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Inspectio
n
an
d
Cleanin
g
5
.
Spra
y
was
h
dirt
y
part
s
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isopropy
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.
6
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t
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140°F
)
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.
7
.
Dr
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.
8
.
Dr
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an
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i
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a
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t
usin
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low-temperatur
e
(125°Ft
o
150°F
)
circulatin
g
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.
Lubricatio
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Ther
e
i
s
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o
periodi
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lubricatio
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require
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thi
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powe
r
supply
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6
"
8
Maintenanc
e
49
51
Table of Contents
Contents
3
Table of Contents
4
List of Illustrations
6
List of Tables
7
Operators and Service Safety Summary
8
Symbols and Terms
8
Specific Precautions
9
Power Source
9
Grounding the Power Supply
9
Proper Power Cord
9
Specifications
11
Product Description
12
General
12
Operational Characteristics
13
Physical Characteristics
14
Environmental Characteristics
14
Electrical Characteristics
14
Operating Information
15
General Operating Instructions
16
Front Panel
16
The Variable Power Supplies
17
Variable Power Supply Controls
17
The Fixed Voltage Power Supply
18
Fixed Power Supply Controls
18
Rear Panel
19
PS280 or PS283 Rear Panel
19
Theory of Operation
20
Circuit Description
21
Master Voltage Output
21
Slave Voltage Output
22
PS280 or PS283 Variable Outputs Block Diagram
23
5 V Fixed Voltage Output
24
PS280 or PS283 5 V Block Diagram
24
Performance Verification
25
Preparation
26
Requirements for Performance
26
Warm-Up Period
26
Test Equipment
26
Access
26
Equipment Required
27
Performance Tests
28
Constant Current Load Regulation
28
Constant Current Test Setup
28
Load Resistor Values for Current Checks
29
Set up the Equipment
29
Performance Tests
29
Constant Current Ripple and Noise
30
Constant Current Ripple and Noise Test Setup
30
Load Resistor Values for Ripple Checks
31
Constant Voltage Regulation
32
Constant Voltage Test Setup
32
Load Resistor Values for Voltage Checks
33
Adjustment
34
Access
35
Personnel
35
Adjustment
35
Preparation
35
Requirements for Performance
35
Warm-Up Period
35
Test Equipment
35
Adjustment Procedures
36
Independent Mode
36
Adjustment Procedures
37
Series Tracking Mode
38
Parallel Tracking Mode
39
5 V F I X E D
40
5 V Fixed
40
Master Circuit Board Adjustment Locations
41
Display Assembly Circuit Board Adjustment Locations
42
Front Panel Controls Circuit Board Adjustment Locations
42
Maintenance
43
Information
44
Helpful Procedures
44
Preventing ESD
44
Relative Susceptibility to Static-Discharge Damage
46
General Care
47
Inspection and Cleaning Procedures
47
Inspect Exterior
47
Cleaning Procedure - Exterior
48
Inspect Interior
48
Cleaning Procedure - Interior
49
Lubrication
50
Removal and Installation Procedures
51
List of Modules
51
General Instructions
52
Top Cover Removal
52
Slave Circuit Board Removal
54
Fuse Circuit Board Removal
55
Slave and Fuse Circuit Board Removal
55
AC Selector Circuit Board Removal
56
AC Selector and Master Circuit Board Removal
57
Master Circuit Board Removal
58
Front Panel Display Circuit Boards Assembly Removal
59
Front Panel Display Assembly Removal
60
Front Panel Controls Circuit Board Removal
61
Front Panel Controls Assembly
62
Output Connectors Circuit Board Removal
63
Output Connectors Circuit Board and Power Switch Location
64
Power Transistor Circuit Boards Removal
65
Power Transistor Circuit Boards Location
65
Options
66
Options and Accessories
67
Power Cord Options
67
Standard Accessories
67
Optional Accessories
67
Parts List
68
Using the Parts List
70
Item Names
70
Indentation System
70
Exploded View
76
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User Manual
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Tektronix PS280 Specifications
General
Brand
Tektronix
Model
PS280
Category
Power Supply
Language
English
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