Monitor Audio Vector Manuel de service télécharger pdf (Page 41)

Functional Overview

WFM90D and WFM91D Service Manual

2-11

CAUTION. DC Power Source

To avoid possible damage to the instrument circuitry when using a DC power

source other than the supplied AC adapter, ensure that the DC source is a

negative-ground 11 -- 18 V system with a negative center lead. The DC source

should be able to provide 12 W of power.

DC IN 11-18V

Figure 2- 7: WFM90D and WFM91D side panels

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 179 180

Service Manual 1
WFM90D and WFM91D 1
Handheld Waveform, Vector 1
Picture, and Audio Monitor 1
071-1143-01 1
WARRANTY 3
Table of Contents 5
Adjustment Procedures 6
List of Figures 8
List of Tables 10
General Safety Summary 11
Symbols and Terms 12
Service Safety Summary 13
About This Manual 15
Related Manuals 15
Contacting Tektronix 16
Specifications 17
Characteristics Tables 20
Electrical Specifications 20
Table 1- 2: DC restoration 22
Table 1- 3: Audio mode 23
Table 1- 5: Vector mode 24
Table 1- 6: Synchronization 25
Table 1- 7: Power source 25
Physical Characteristics 26
Environmental Characteristics 26
Certification and Compliances 27
Operating Information 29
Installation 31
Desk Stand 32
Travel Case 33
Electrical Installation 34
Replacing the Alkaline 35
Functional Overview 37
Figure 2- 6: WFM90D keypad 38
Menu Control 39
Arrow Buttons 39
Instrument Reset 40
DC IN 11-18V 41
Using the Menus 45
Operating Menus 47
Vector Menu 48
Audio Menu 49
Picture Menu 49
WIP Menu 50
(Waveform-in-Picture) 50
Configuration Menu 51
Line Select Menu 56
Theory of Operation 57
Top Board 60
Performance Verification 63
Summary V erification 66
Equipment Required 67
Sync Separation 69
Overscan 72
Vector Phase Stability 75
Chrominance Bandwidth 76
Check Sync Separation 79
Check Frequency Response 80
Adjustments 85
Raster VCO 89
Frequency Response 91
Vector Quadrature Phase 93
Vector Gain and X5 Gain Phase 93
Audio Gain 94
Vertical Gain 95
Cable Margin 97
Maintenance 101
After Repair Adjustments 102
Repackaging Instructions 102
Remove and Replace 103
Procedures 104
Top Cover Assembly 105
Remove Torx screws (6) 106
LCD Display Assembly 107
LCD - Newer Inst ruments 108
LCD - Older Instruments 111
Backlight 114
Top Board Assembly 115
Pull nub 116
Top board 116
Top Board Shield 117
Bottom Board 119
SDI Interface Board 121
Backlight Board 122
Input Board Assembly 124
Battery Cover Assembly 125
Turnlock Stud and 126
Turnlock 127
Battery cover 127
Batteries 128
Alkaline Batteries 129
Bottom Cover Assembly 131
Battery Contacts 132
Turnlock Stud Receptacle 134
Bottom Cover Electrical 134
AC Adapt er EMI 137
Suppressor 137
Troubleshooting Procedures 139
Battery-Fault Analysis 140
Low -Voltage Power Supply 142
Fault Symptom Table 143
Troubleshooting Flowcharts 144
Connector Diagram 159
H NiMH battery pack 163
H Viewing hood 163
H Desk stand 163
Accessories 164
Replaceable Mechanical Parts 165
Replaceable Parts List 167
Abbreviations 168
Mfr. Code to Manufacturer 168
Cross Index 168
Instrument Accessories 168
Manufacturers Cross Index 169
Diagrams 177

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Monitor Audio Vector Manuel de service Page 41

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