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Tektronix 1502C Service Manual

Tektronix 1502C
254 pages
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Table of Contents

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Tektronix 1502C Specifications

General IconGeneral
BrandTektronix
Model1502C
CategoryMeasuring Instruments
LanguageEnglish

Summary

Service Manual

General Safety Summary

Power Source

Details on the product's intended power source and safe operation.

Service Safety Summary

Do Not Service Alone

Warning against performing service procedures without assistance.

General Information

Product Description

Overview of the Tektronix 1502C Metallic-cable Time-Domain Reflectometer.

Installation and Repacking

Unpacking and Initial Inspection

Procedure for inspecting the instrument upon receipt and for external damage.

Operating Instructions

Overview

General handling, storage, and powering information for the 1502C instrument.

Operating Instructions

Front-Panel Controls

Detailed explanation of the function of each front-panel control.

Operating Instructions

Menu Selections

Overview of how to navigate and use the instrument's menu system.

Test Preparations

Finding an Unknown Vp

Procedure for determining the Vp of an unknown cable type.

Cable Test Procedure

Distance to the Fault

Steps to set up the instrument and identify cable faults and their distances.

Return Loss Measurements

Using VIEW INPUT

Using VIEW STORE

Using Horizontal Set Reference

Additional Features (Menu Selected)

Max Hold

Captures and stores waveforms on an ongoing basis to monitor intermittent conditions.

Operator Performance Checks

Equipment Required

Lists the items needed to perform operator performance checks.

Operator Performance Checks

Horizontal Scale (Timebase) Check

Verifies the accuracy of the instrument's timebase and distance measurements.

Operator Performance Checks

Vertical Position (Offset) Check

Checks the ability to move the waveform vertically on the display.

Operator Performance Checks

Noise Check

Assesses the instrument's noise levels and the effectiveness of the noise filter.

Operator Performance Checks

Offset/Gain Check

Tests for out-of-tolerance steps in the programmable gain stage.

Risetime Check

Jitter Check

Adjustment Procedures

Equipment Required

Lists the tools and equipment needed for adjustment procedures.

Power Supply Checks and Adjustments

Power-Up Procedure

Steps to follow when powering up the instrument for checks.

Power Supply Checks and Adjustments

Voltage Checks

Procedure to measure voltage levels at various test points on the power supply board.

Main Board ± 12 VDC Check and Adjust

DC Power Check

DC Power Check

Charging Current Check

Measures the voltage drop across R2012 to verify charging current.

Impedance Check

LCD Check and Adjustment

Zero Offset Adjust

After Adjustments are Completed

Maintenance

Preventive Maintenance

Includes cleaning, visual inspection, and lubrication for instrument upkeep.

Part Removal and Replacement

AC Fuse

Instructions for accessing and replacing the AC fuse.

Part Removal and Replacement

Removal of Case and EMI Shields

Steps to remove the instrument cover and EMI shields for access.

Part Removal and Replacement

Removing the Battery

Steps to disconnect and remove the internal lead-gel battery.

Lithium Battery Replacement

Part Removal and Replacement

Removing the Front Panel Assembly

Procedure for detaching the front panel assembly from the chassis.

Changing the Default to Metric

Troubleshooting

Troubleshooting Flow Chart

Provides flow charts to guide in diagnosing instrument issues.

Replaceable Electrical Parts

Parts Ordering Information

Guidance on how to order replacement parts, including necessary information.

Replaceable Parts List (Cont.)

CIRCUIT BOARD ASSEMBLIES

Lists assemblies for circuit boards, including part numbers and effective serial numbers.

Diagrams

General Information

Explains numbering conventions, grids, and locators used in diagrams.

Diagrams

A1 – MAIN

Component locator diagram for the main board.

Diagrams

A3A1 – POWER SUPPLY

Component locator diagram for the power supply board.

Diagrams

A4 – S/R DRIVER SAMPLER

Component locator diagram for the S/R driver sampler board.

Diagrams

A2–FRONT PANEL

Component locator diagram for the front panel board.

Replaceable Mechanical Parts

Parts Ordering Information

Guidance on ordering mechanical replacement parts.

Replaceable Mechanical Parts List (Cont.)

FIG. 10-1 CABINET

Exploded view and parts list for the instrument cabinet.

Replaceable Mechanical Parts List (Cont.)

FIG. 10-2. FRAME AND FRONT PANEL (Con’t)

Exploded view and parts list for the frame and front panel.

Replaceable Mechanical Parts List (Cont.)

FIG. 10-3. POWER SUPPLY MODULE

Exploded view and parts list for the power supply module.

Glossary

Cable

Definition of electrical conductors used in cables.

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