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Tektronix 2212 Service Manual
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Adjusbnent
Procedures
Trig
:
fflIIII
VUTIClL
~I"-"
...
....
-
..
-
CH2
I
II
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.,.
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Figure
5-2:
'IV
Llne
17
of
Field
1
in
the
NTSC
system
Trig
:
fflIIII
VUTIClL
CB2
0.2v
.,.
20us
Figure
5-3:
TV
Line
17
of
Field
1
in
the
PAL
system
2212
Service
Manual
Revised
3/93
5-
25
158
160
Table of Contents
Table of Contents
5
Product Description
19
Indicators
19
Signal Acquisition System
20
Vertical Non-Storage Deflection System
21
Horizontal Display System
22
Horizontal Non-Storage Display System
22
Horizontal Storage Display System
22
Triggering System
23
Setup
24
Cursor
24
Storage and I/O
25
Display
25
Nominal Traits
27
Table 1-4: Nominal Traits - Display System
28
Table 1-5: Nominal Traits-Interfaces, Output Ports, and Power Fuse
29
Table 1-6: Nominal Traits - Mechanical
30
Warranted Characteristics
31
Performance Conditions
31
Table 1-8: Warranted Characteristics - Horizontal System
33
Table 1-9: Warranted Characteristics - Triggering System
35
Table 1-11: Warranted Characteristics-Readout Display System
39
Table 1-12: Warranted Characteristics-X-Y Display System
41
Typical Characteristics
45
Table 1-16: Typical Characteristics - Vertical System
47
Table 1-18: Typical Characteristics-Triggering System
49
Operating Information
51
Using this Manual
51
Before Servicing
51
Manual Structure
51
Tektronix Service
52
Repair or Calibration Service
52
Warranty Repair Service
52
Finding Other Information
53
General Information
55
Supplying Operating Power
55
Operating Voltage
56
Power Cord Information
56
Table 2-1: Power Cord Conductor Identification
56
Table 2-2: Power Cord and Plug Identification
57
Operating Environment
58
Operating Temperature
58
Ventilation Requirements
58
Overview
59
Logic Conventions
59
Overview of the Circuits
59
Main Board (Al0)
59
(Optional)
60
Daculator Piggy Back Board (A14)
60
Front Board (A12)
60
General Purpose Interface Bus (GPIB) Board (A17)
60
Power Bo,Ard (All)
60
Processor Board (A15)
60
Serial Interface Board (A16) (Optional)
60
Block Diagrain
61
Vertical Amplifiers
61
Trigger and Ho'rizont3', Amplifiers
61
Digital Storage
62
Figure 3-1: Simplified 2212 Block Diagram
62
Front Panel and System Control
63
High and Lowvoltag'e Power Supply
63
Z-Axis
63
Vertical
65
Vertical System
65
Pre-Amplifier
65
Attenuator Circuit
65
Figure 3-2: 2212 Vertical System Block Diagram
66
Table 3-1: Attenuation Factors Vs. Logic Levels
67
DC Balance
68
Probe Coding
68
Storage Pick-Off Amplifier U102
68
Delay Line Driver
69
Vertical Output Amplifier
69
Vertical Position Logic
69
Vertical Switch Logic
70
Figure 3-3: 2212 Horizontal System Block Diagram
71
Trigger Circuit
72
Sweep Logic Circuit
72
Auto Cal and AUTO Setup
73
Timebase Generator
73
Horizontal Magnifiers and Readoutmux
74
Z-Axis Circuit
74
Figure 3-4: 2212 Z-Axis Block Diagram
75
Daculator Circuit
76
Serial Data Chain
76
Horizontal System and Z-Axis Circuit
71
Digital Circuitry
77
Microprocessor Circuit
77
Figure 3-5: 68070 Micro Processor Block Diagram
78
Display System
80
Figure 3-6: 2212 Display System Block Diagram
80
Table 3-2: Readout Control Table
82
Acquisition System
83
Tµe, Acquisition Data ;Path
83
Referen~ Voltage 1
83
Digital Acquisition Data Path
84
Figure 3-7: 2212 Acquisition Block Diagram
84
R~~9Rd ,Mode-Acquisition
85
F >~ , ,Re;Cord Mod~ Data Transfer to 68070
85
Acquiring Rp_Ll Mode Data
85
Table 3-3: Timebase Table
86
Parallel Interface
87
Serial Interface Board A~6,(Optional)
88
Front-Panel Controls
89
Front Panel Switches
89
Fre>Nt Panel Potentiometers
89
Front Panel Led's
90
Figure 3-8: 2212 Front Panel Block Diagram
90
Power ~Upp~Y
91
Mains Input
91
Preregulat~R
91
Series
92
Inverter
92
Outputs
93
Table 3-4 Acquisition Chain Record-Length Programming Table
100
Conventions
103
Initial Setup,Procedure
104
Test Equipment Required
104
Limits and Tolerances
107
Preparation
107
Performance Tests
109
Vertical Checks
110
Table 4-2: Deflection Accuracy Limits
111
Horizontal Checks
114
Position
116
Table 4-3: Settings for Timing Accuracy Checks
117
Triggering Checks
118
Probe Adjust Check
124
X-Y Display Checks
126
Video Triggering Checks
129
Figure 4-3 TV Line 17 of Field 2 in the NTSC System
132
Figure 4-4 TV Line 17 of Field 2 in the PAL System
132
Brief Procedures
135
Initial Setup Procedure
135
Test Equipment Required
136
Table 5-1: Test Equipment Required
137
Preparation
139
Limits and Tolerances
139
Index Calibration Procedures
140
Adjustment Procedures
141
Power Supply and CRT Display Adjustments
142
Mode
142
Volts/DIV
142
Ariable
142
Ac-Gnd-DC
142
Horizontal
142
Position
142
Mode Alt Magn
142
Sec/DIV
142
Magnifier
142
Check/Adjust Power Supply DC Levels (R1337)
143
Table 5-2: Power Supply Limits
143
Adjust Readout Jitter (R340)
144
CRT Display Adjustment
144
Coupling
145
Adjust Balance
146
Adjust Vertical Gain (R135, R185, R207, R209, and R1930)
146
Adjust Attenuator Compensation (AT100, AT150)
147
Figure 5-1: Attenuator Trimmer Layout
147
Adjust High Frequency Compensation (R304, R305, R341, and C304)
148
Adjust Trigger
150
Horizontal Adjustments
151
Adjust Horizontal Magnifier Compensation (R671, R610)
152
Adjust Magnifier Gain (R647, R627)
152
Adjust Timing
152
Adjust High Speed Timing (Cno, C760)
153
Cursors Adjustments
154
Adjust Cursors
154
Figure 5-3 TV Line 17 of Field 1 in the PAL System
159
Figure 5-6 Location of Video Controls
162
Maintenance
163
Maintenance Information
163
Supplementary Information
163
Preventing ESD
164
Precautions
164
Susceptibility to ESD
164
Table 6-1: Relative Susceptibility to Static-Discharge Damage
165
General Care
167
Inspection and Cleaning Procedures
167
Cleaning Procedure - Exterior
168
Inspection - Exterior
168
Inspection and Cleaning
168
Table 6-2: External Inspection Check List
168
Inspection - Interior
169
Table 6-3: Internal Inspection Check List
169
Cleaning Procedure - Interior
170
Lubrication
170
Removal and Installation Procedures
171
Cabinet
171
Storage Board
172
Power Supply Board
172
GPIB Board (Option 10 Only)
174
RS-232-C Board (Option 12 Only)
174
Main Board
174
Cathode-Ray Tube
175
Front Panel Board
176
Front Panel Assembly
177
Transformer
177
Fan Motor
178
Power-On Extension Shaft
178
Options Accessories
179
Options and Accessories
179
Options
180
Table 7-1: Power Cord Options
180
Warranty -Plus Service Options
180
Option 02
181
Option 05 (Video)
181
Option 10 (GPIB)
181
Option 12 (RS-232-C)
181
Option 1K
181
Option 1M
181
Option 3R - Rackmounted Instrument
181
Option 18
182
Standard Accessories
182
Optional Accessories
182
Table 7-2: Standard Accessories
182
Table 7-3: Instrument Enhancements
182
Table 7-5: Fuses
183
Table 7-6: Voltage Probes
183
Table 7-7: Current Probes
184
Table 7-8: Oscilloscope Cameras
184
Table 7-9: Printers/Plotters
184
Replaceable Electrical Parts
185
Parts Ordering Information
185
List of Assemblies
185
Cross Inde'l
186
Abbreviations
186
Electrical Parts List
186
Cross Index - Mfr. Code Number to Manufacturer
188
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Tektronix 2212 Specifications
General
Brand
Tektronix
Model
2212
Category
Test Equipment
Language
English
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