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WFM 91
Tektronix WFM 91 Manuals
Manuals and User Guides for Tektronix WFM 91. We have
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Tektronix WFM 91 manual available for free PDF download: Service Manual
Tektronix WFM 91 Service Manual (155 pages)
Handheld Waveform, Vector, Picture, and Audio Monitor
Brand:
Tektronix
| Category:
Measuring Instruments
| Size: 1 MB
Table of Contents
Warranty
4
Table of Contents
10
General Safety Summary
14
Battery Recycling
15
Certifications and Compliances
16
Service Safety Summary
18
About this Manual
20
Related Manuals
20
Service Strategy
22
Service Offerings
22
Before You Begin
24
Specifications
26
Product Description
28
Characteristics Tables
32
Table 1-1: Vertical Deflection System
33
Table 1-2: DC Restoration
34
Table 1-3: Audio Mode
34
Table 1-4: Horizontal Deflection System
35
Table 1-5: Vector Mode
35
Table 1-6: Synchronization
37
Table 1-7: Physical Characteristics
37
Table 1-8: Environmental Characteristics
37
Table 1-9: Power Source
38
Table 1-10: Safety/Emi
39
Operating Information
40
Installation
42
Mechanical Installation
42
Figure 2-1: Installing the Viewing Hood
43
Figure 2-2: Installing the Desk Stand
43
Electrical Installation
44
Figure 2-3: Instrument Front Panel
45
Figure 2-4: Instrument Side Panels
48
Figure 2-5: On-Screen Readout Messages
50
Table 2-1: Front Panel and Menu Default Settings
51
Theory of Operation
52
Block Diagram Description
54
LCD Display and Backlight
55
Figure 3-1: Simplified Block Diagram
56
Performance Verification
58
Table 4-1: Summary Verification Procedure
60
Table 4-2: Equipment Required for Performance Verification
61
Performance Verification Procedures
63
Preliminary Setup
64
Frequency Response
68
Figure 4-1: -3 Db Marks on the Vector Graticule
71
Adjustment Procedures
74
Table 5-1: Summary Adjustment
76
Table 5-2: Equipment Required for Performance Verification
77
Figure 5-1: NTSC Graticule Showing the Vector Gain Adjustment
84
Maintenance
86
Electrostatic Damage
89
Inspection and Cleaning
90
Repackaging Instructions
91
Removal and Replacement
92
Table 6-1: Tools Required for Module Removal
92
Table 6-2: Removal and Replacement Procedure List
93
Figure 6-1: Removing the Top Cover
94
Figure 6-2: Installing the LCD Display Cable
96
Figure 6-3: Installing the LCD Display
98
Figure 6-4: Installing the Keypad
101
Figure 6-5: Installing the Top Board Shield
102
Figure 6-6: Installing the Bottom Board
104
Figure 6-7: Installing the Battery Cover
106
Figure 6-8: Removal and Replacement of the Turnlock Stud
107
Figure 6-9: Removing the Nicad Battery Pack
109
Figure 6-10: Installed Polarity of Alkaline Batteries
110
Figure 6-11: Battery Contact Installation Alignment
112
Figure 6-12: Battery Power-Wire and Turnlock Stud Receptacle
113
Figure 6-13: Battery Orientation Marker Position
115
Figure 6-14: Installing the EMI Suppressor
116
Troubleshooting Procedures
118
Table 6-3: Equipment Required for Troubleshooting
118
Figure 6-15: Testing the Battery Charging Circuit - WFM 90 SN B011362
119
Figure 6-16: Testing the Battery Charging Circuit - WFM 90 SN B011363
120
Low-Voltage Power Supply
121
Table 6-4: Low-Voltage Power Supplies
122
Fault Symptom Table
122
Table 6-5: Fault Symptom Table
123
Troubleshooting Flowcharts
123
Figure 6-17: Flowchart for no Display
124
Figure 6-18: Flowchart for Distorted Waveform Display
125
Figure 6-19: Flowchart for no Vector Display
126
Figure 6-20: Flowchart for Bad Audio Display
127
Figure 6-21: Flowchart for no Picture Display
128
Figure 6-22: Flowchart for Bad Graticules and Menus
129
Connector Diagram
137
Options and Accessories
140
Standard Accessories
141
Optional Accessories
141
Replaceable Parts
142
Replaceable Parts List
144
Parts Ordering Information
144
Using the Replaceable Parts List
145
Table 8-1: Replaceable Parts List Column Descriptions
145
Instrument Accessories
145
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