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TAS 465
Tektronix TAS 465 User Manual
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Circuit
Description
Theory
of
Operation
3Ć2
2
2
2
PINS
2
PINS
J80
J82
P82
P80
DISPLA
Y
CONTROL
B
OARD
A02
5
5
PINS
J84
P84
40
40
PINS
J50
P50
A05
PROCESSOR
B
OARD
16
16
PINS
16
PINS
J30
J84
J30
P30
P30
P84
5
PINS
FRONT
ĆP
ANEL
GND
J35
PROBE
COMP
A04
BEZEL
BUTTON
BOARD
J40
10
PINS
P40
10
PINS
A09
12
J55
5
PINS
12
TERMINATIONS
5
5
TERMINATIONS
P55
L
V
&
HV
POWER
SUPPL
Y
BOARD
SW
115/230V
FA
N
2
PINS
A63
2
TERMINATIONS
1
TERMINATION
2
BOARD
Figure
3Ć1:ăBlock
Diagram
47
49
Table of Contents
Table of Contents
3
List of Figures
9
List of Tables
13
Safety Summary
15
Symbols and Terms
15
Specific Precautions
16
Preface
19
Related Manuals
20
Product Description
21
User Interface
22
Autoset
22
Menus
22
General Purpose Knob and TOGGLE
22
Save/Recall Setups
22
Vertical System
23
Horizontal System
23
Trigger System
23
Measurement Cursors
23
Nominal Traits
25
Table 1 1: Nominal Traits
25
Table 1 2: Nominal Traits
26
Table 1 3: Nominal Traits
26
Table 1 4: Nominal Traits
26
Table 1 9: Nominal Traits Mechanical
28
Warranted Characteristics
29
Performance Conditions
29
Table 1 10: Warranted Characteristics
29
Typical Characteristics
35
Table 1 18: Typical Characteristics
35
Table 1 19: Typical Characteristics
35
Table 1 20: Typical Characteristics
36
Table 1 21: Typical Characteristics
37
Table 1 22: Typical Characteristics
37
Table 1 23: Typical Characteristics
37
Table 1 24: Typical Characteristics
37
Installation and Power on
39
Figure 2 1: Rear Panel
39
Figure 2 2: Fuse Compartment
40
Figure 2 3: POWER Button
40
Quick Start
41
Selecting and Deselecting Input Channels
41
Using the Menus
41
Connecting a Signal
42
Using AUTOSET
42
Compensating the Probe
43
Figure 2 4: Probe Compensation Signal Displayed after AUTOSET
43
Figure 2 5: Connections for Compensating a Probe
43
Figure 2 6: How Probe Compensation Affects Signals
45
Figure 2 7: Location of Probe Head Adjustment
45
Menu Map
46
Figure 2 8: Menu Map
46
Circuit Description
47
Logic Conventions
47
Module Interconnection
47
Figure 3 1: Block Diagram
48
Analog Board
50
Attenuators A1
50
Probe Coding Interface A1
50
Analog Acquisition Hybrid A1
50
External Trigger A1
50
Processor System
50
Processor Subsystem A5
50
ROM/RAM Subsystem A5
51
Readout Subsystem A5
51
Front Panel Interface Subsystem A5
51
Analog Board Interface Subsystem A5
51
Display Assembly
52
Vertical Output A3
52
Horizontal Output A3
52
High Voltage A3
52
Front Panel
52
Menu Switches A4
53
Cpu A4
53
FPP Pots & Probes A4
53
Leds & Driver A4
53
Switches A4
54
Power Supply
54
Fan
54
General Instructions
55
Using the Brief Performance Checks Procedures
55
Using the Performance Tests Procedures
55
Conventions
56
Figure 4 1: Graticule References
56
Brief Performance Checks
57
Power on Self Tests
57
Functional Tests
57
Functional Tests Prerequisites
58
Verify the Probe Compensator Output
58
Figure 4 2: Test Hookup for Functional Tests
58
Verify the Input Channels
59
Verify the Alt/Chop and Add Functions
60
Verify the Time Base
60
Verify the Trigger System
61
Verify the External Trigger
63
Temperature Compensation Calibrations
63
Horizontal Sweep Path
63
Figure 4 3: Horizontal Adjustments (One)
64
Figure 4 4: Horizontal Adjustments (Two)
64
Vertical Signal Path
65
Figure 4 5: Horizontal Adjustments (Three)
65
Performance Tests
67
Performance Tests Prerequisites
67
Equipment Required
67
Table 4 1: Required Test Equipment
68
Vertical System Checks
69
Check DC Gain and Voltage Measurement Accuracy
69
Figure 4 6: Gain and Voltage Test Setup
69
Check Trigger Level Accuracy
70
Table 4 2: DC Gain and Delta Volts Accuracy
70
Check DC Coupling Bandwidth
71
Figure 4 7: Trigger Level Test Setup
71
Figure 4 8: Bandwidth Test Setup
72
Table 4 3: DC Coupled Bandwidth
72
Check X Axis Gain
73
Figure 4 9: X Axis Gain Test Setup
73
Horizontal System Checks
74
Check Time Base and Time Cursor Accuracy
74
Figure 4 10: Timing Test Setup
74
Table 4 4: Time Base and Cursor Accuracies (Mag Off)
75
Check Dual Delay Accuracy
76
Table 4 5: Time Base Accuracy (Mag On)
76
Figure 4 11: Dual Delay Test Setup
77
Trigger System Checks
78
Check Trigger Sensitivity
78
Table 4 6: 500 Ms Dual Delay Accuracy
78
Figure 4 12: Trigger Sensitivity Test Setup (One)
79
Figure 4 13: Trigger Sensitivity Test Setup (Two)
80
Figure 4 14: Trigger Sensitivity Test Setup (Three)
81
Figure 4 15: Trigger Sensitivity Test Setup (Four)
81
Video Trigger Sensitivity
83
Figure 4 16: Video Trigger Test Setup
83
Adjustment Procedures
85
Requirements for Performance
85
Personnel
85
Access to Adjustments
85
Warm up Period
85
Equipment Required
86
Figure 5 1: Location of Boards for Adjustments
86
Performing the Adjustment Procedures
87
Complete Adjustment
87
Partial Adjustment
87
Adjustment Dependencies
87
Adjustment Instructions
88
Power Supply Adjustment
88
Table 5 1: Adjustments and Dependencies
88
CRT Adjustments
89
Figure 5 2: CRT Adjustments Calibration Setup
89
Low Frequency Output Compensation
90
Figure 5 3: Low Frequency Output Compensation Calibration
91
Factory Horizontal Cal
92
Figure 5 4: Horizontal Adjustments (One)
93
Figure 5 5: Horizontal Adjustments (Two)
93
Figure 5 6: Horizontal Adjustments (Three)
94
Figure 5 7: Horizontal Output Calibration Setup
95
Factory Vertical Cal
96
Figure 5 8: Factory Vertical Calibration Setup
97
Figure 5 9: External Trigger Calibration Setup
97
Figure 5 10: Vertical Adjustments
98
High Frequency Step Response
99
Figure 5 11: Adjusting Vertical Gain and Centering
99
Attenuator Compensation
100
Figure 5 12: High Frequency Step Response Test Setup
100
Figure 5 13: Attenuator Compensation Test Setup
101
Vertical Gain Adjust (Cabinet On)
102
Figure 5 14: Display Driver Board Adjustment Locations
104
Figure 5 15: Analog Board Adjustment Locations
105
Figure 5 16: Power Supply Adjustment Location
106
Figure 5 17: Location of J205 (CAL-DIS) on the CPU Board
107
Maintenance Information
109
Before Servicing
109
Tektronix Service
109
Warranty Service
109
Repair or Calibration Service
110
Self Service
110
Preventing ESD
110
Table 6 1: Relative Susceptibility to Static Discharge Damage
111
Inspection and Cleaning
113
General Care
113
Inspection and Cleaning Procedures
113
Inspection Exterior
114
Cleaning Procedure Exterior
114
Table 6 2: External Inspection Check List
114
Cleaning Procedure Interior
115
Cleaning the CRT Implosion Shield
115
Removal and Installation Procedures
117
Preparation Please Read
117
Cable Removal
117
General Instructions
118
Summary of Procedures
118
Figure 6 1: Oscilloscope Orientation
118
Table 6 3: Tools Required for Module Removal
119
Figure 6 2: Cabinet and Front Panel Mounted Modules
120
Figure 6 3: Internal Modules
121
Line Cord and Line Fuse
122
Line Cord
122
Figure 6 4: Cables and Cable Routing
122
Line Fuse
123
Front Panel Knobs and Shafts
123
Figure 6 5: Line Fuse and Line Cord Removal
123
Removing Front Panel Knobs and Shafts
124
Installing Front Panel Knobs and Shafts
124
Figure 6 6: Knob and Shaft Removal
124
Feet, Rear Cover, and Cabinet
125
Figure 6 7: Rear Cover, Cabinet, and Feet Removal
125
Rear Cover
126
Cabinet
126
Replacing the Front Feet
126
Front Panel Trim, Menu and Power Buttons, EMI Gasket
126
Removing the Front Trim
126
Menu Buttons and Elastomer
127
Power Button Replacement
127
Installing the Front Trim
127
Installing the EMI Gaskets
128
Figure 6 8: Trim Ring and Menu Buttons Removal
128
A62 Front Panel Module Removal
129
Figure 6 9: EMI Gasket Installation
129
Front Panel Module Disassembly/Assembly
130
Figure 6 10: A62 Front Panel Module Removal
130
Figure 6 11: Disassembly of Front Panel Assembly
131
Reassembly of the Front Panel Module
132
Figure 6 12: Front Panel Ground Spring
132
Menu Flex Circuit Replacement
133
Figure 6 13: Menu Flex Circuit Board Removal
133
A1 Analog Board
134
Display Driver Board (A3)
135
Figure 6 14: A1 Analog Board Removal
135
Figure 9 5: A1 Analog Board
135
CRT Implosion Shield
136
Figure 6 15: Location of Display Driver Board
136
Figure 6 16: CRT Implosion Shield Removal
137
Figure 6 17: Fan Mount Removal
138
Figure 6 18: Fan and Fan Mount Removal
139
Figure 6 19: CRT Rear Bracket and Ground Wire
141
Figure 6 20: CRT Removal
143
Figure 6 21: Removing the CRT Front Bracket
145
Figure 6 22: Removing the Display Control Board
146
Figure 6 23: Power Button Shaft Disconnect
147
Figure 6 24: Power Supply Removal
147
Table 6 4: Equipment Required for Troubleshooting
149
Table 6 5: Symptom Matrix
150
Figure 6 25: A5 CPU Board Troubleshooting Procedure
152
Figure 6 26: A1 Analog Board Troubleshooting Procedure
153
Figure 6 27: A3 Display Driver Board Troubleshooting Procedure
155
Figure 6 28: A62 Front Panel Module Troubleshooting Procedure
157
Figure 6 29: A2 Display Control Board Troubleshooting Procedure
158
Table 7 1: International Power Cords
161
Figure 9 1: Graphic Items and Special Symbols Used in this
194
Figure 9 2: Circuit Board Component Locator Diagram Key
194
Figure 9 3: Semiconductor Lead Configurations
195
Figure 9 4: Locating Components on Circuit Board or Schematic
196
Figure 9 6: A2 Display Control Board
201
Figure 9 7: A3 Display Driver Board
203
Figure 9 8: A4 Front Panel Board
205
Figure 9 9: A5 Processor Board
207
Figure 9 10: A63 Power Supply
209
Figure 10 1: Cabinet and Rear
261
Figure 10 2: Front Panel Assembly
263
Figure 10 3: Chassis
265
Figure 10 4: Circuit Boards
267
Figure 10 5: Accessories
268
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Tektronix TAS 465 Specifications
General
Brand
Tektronix
Model
TAS 465
Category
Test Equipment
Language
English
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