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Tektronix Manuals
Amplifier
11A52
Service manual
Tektronix 11A52 Service Manual
Extended service, two channel amplifier
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Also See for 11A52
:
User reference supplement
(51 pages)
,
Service & reference manual
(90 pages)
,
Manual
(50 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
List of Illustrations
Safety Summary
Section 1- General Information
Introduction
Amplifier-To-Oscilloscope Compatibility
Initial Inspection
Oscilloscope Options
Packaging for Shipment
Operating Temperature
Section 2-Theory of Operation
Block Diagram
Figure 2-1 11A52 Basic Block Diagram
Input Attenuators
Attenuators
AC/DC Coupling (#2 Relay)
Calibrate/Normal (#1 Relay)
Lox/Lx (#3 Relay)
Lox/Lx (#4 Relay)
Attenuator States
Off
Calibration
Input Overload Sensing
Fuse Check Circuit
Relay Fast Power on (RFPO)
Kernel
Analog Control Voltage System
Analog-To-Digital Converter
Random Access Memory
Data Retention Mode
Read Mode
Write Mode
Calipration Buff er Amplifier
Mpv
Oscillator
Housekeeper IC
Digital-To-Analog Converter
Address Buffer Latch
Output Latches
Reset Circuit
Analog Control/Signal Amplifiers
Sample/Hold Assemblies
Coarse and Fine Offsets
High Frequency Adjust Signals
Signal Amplifiers
Power Supplies
Section 3 -Maintenance
Preventive Maintenance
Amplifier Shield Removal
Cleaning
Exterior
Interior
Visual Inspection
Semiconductor Checks
Periodic Electrical Adjustment
Corrective Maintenance
Ordering Parts
Static-Sensitive Device Classification
Replacing Parts
How to Replace Semiconductors
How to Remove the Housekeeper Integrated Circuit
How to Install the Housekeeper Integrated Circuit
How to Replace Amplifier Hybrid Circuits
Figure 3-1 Exploded View of Housekeeper IC
How to Replace Peltola Coaxial-Cable Connectors
Figure 3-3 Peltola Coaxial Cable Connector Assembly
How to Remove the Front Panel
How to Install the Front Panel O
How to Replace a Front Panel Board
How to Remove the Main Board
Figure 3-4 Nut Blocks and Heat Sink Retaining Screws
How to Install the Main Board
Figure 3-5 How the Main Board Fits in the Frame
How to Remove and Replace a BNC Connector Assembly (BCA)
How to Remove an Attenuator Assembly (AA)
How to Install an Attenuator Assembly (AA)
Soldering Techniques
Figure 3-6 Recommended Desoldering Sequence
Troubleshooting
Troubleshooting Aids
Diagrams
Circuit Board Illustrations
Component Color Coding
Wiring Color Code
Semiconductor Lead Configurations
Figure 3-7 Resistor Color Codes
Figure 3-8 Semiconductor Lead Configurations
Multi-Pin Connector Identification
Figure 3-9 Multi-Pin Connector Orientation
Troubleshooting Equipment
Troubleshooting Techniques
Check Control Settings
Check Associated Equipment
Visual Check
Isolate Trouble to Circuit
Check Oscilloscope Adjustment
Check Individual Components
Repair and Adjust the Circuit
Section 4-Diagnostics
Diagnostics Overview
Kernel Tests
Figure 4-1 Sample LED Fault Code Timing Diagram
Self Tests
Extended Diagnostics
Test Descriptions
Attenuator-Driver Test (RELAY DRVR)
Check Probecode Stability (PROBECODES)
Check Signal Path Calconstant Checksum (CKSM PLUG)
Check Probe Calconstant Checksum (CKSM PROBE)
Walking Ones Test (WALK ONES)
Analog-To~Digital Converter Test (ADC TEST)
Fuse Test (FUSE TEST)
Analog Control Voltage System Test (ACVS TEST)
Calconstant Diagnostics
Probe Gain
Attengain
Bwlmatch
Gain
Step Gain
Balance
Coarse Dac
Outputerr
Fine Dac
Prb Coarse
Prb Fine
Spare Gain
Bias Comp
Bias Error
Prbimbal
Explain Cal (EXPLAINCAL)
Attengain
Bwlmatch
Step Gain
Calconstant Dumper (CC DUMPER)
Gain
Gainoff
Gainon
Unreported Amplifier Calibration Failures
Trigger Path Failure
Large Amplifier Errors
Old Calibration Constants
Failures Reported Though Calibration Achieved
CKSM Plug Failure at Power-Up
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Service
- - - - - - - - - - - - - - - - - - - - - - - M a n u a l
11A52
Extended Service
COMMITTED TO EXCELLENCE
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Troubleshooting
Troubleshooting
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Troubleshooting Equipment
61
Troubleshooting Techniques
62
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