ELEC 1230 - Troubleshooting 1

Prerequisite: ELEC-1171

Corequisite: ELEC-1240

Outcome 2:
Upon completion of this course the student will identify and trace electrical signals.

Outcome 3:
Upon completion of this course the student will identify schematic symbols and components.

Outcome 4:
Upon completion of this course the student will use data sheets, and select replacement components.

Outcome 5:
Upon completion of this course the student will construct electrical circuits.

Outcome 6:
Upon completion of this course the student will use test equipment.

Outcome 7:
Upon completion of this course the student will troubleshoot and repair electronic circuits.

Outcome 8:
Upon completion of this course the student will remove and replace electronic components.

Outcome 9:
Upon completion of this course the student will test components.

Outcome 10:
Upon completion of this course the student will observe safety procedures.

Objectives:
Upon completion of this course and through the use of test equipment and proper service data, the student will be able to:

1. Troubleshoot electronic circuits, locate, and replace defective components in these circuits.
2. Solder and desolder various components in electronic circuits to effect repairs to the circuits.
3. Recognize faults through observation, and to test and repair these faults.
4. Test Cathode Ray Tubes as used in Video Monitors and display terminals.
5. Select suitable replacement components.

1. Introduction to the course. Review of test equipment.
2. Soldering and desoldering techniques. Types of solder used, melting points of solders. Temperature of iron tips.
3. Troubleshooting problems in low voltage power supplies. Definitions of (shorts) (opens)(leakage) Testing of Semiconductors with a meter.
4. Discuss the Block Diagram of a Black and White TV. Discuss the components of a composite video signal, including the timing of the scan signals needed to produce a raster.
5. Testing and evaluation the horizontal oscillator and scan circuits. Locating and replacing the faulty components. Selecting and obtaining the replacement parts.
6. Troubleshooting High Voltage shutdown circuits. (X-Ray protection Circuits).
7. Guidelines for the replacement in the category of (critical Component) Replacement component selection.
8. Testing and evaluating vertical oscillator and scan circuits. Problems, methods used to locate and replace the defective components. Readjustment of the circuits for proper scan of the CRT.
9. No hold control circuits, vertical and horizontal frequency dividers.
10. Discuss the differences between monitors and TV’s using Block Diagrams.
11. Techniques used in troubleshooting video signal processing circuits. Signal injection, signal tracing, voltage measurement.
12. Brightness and contrast problems, methods used to determine if the brightness problems are in the video signal processors or in some other section of the device.
13. Sync separation, evaluation of circuits after the repairs have been completed.
14. Audio problems. Signal tracing and signal injection to locate problem area.
15. High voltage measurement, troubleshooting high voltage circuits.
16. Cathode Ray Tubes, testing for emission, gas, gun balance. Test equipment required for these tests, use of the equipment, evaluation of the tests.
17. Replacement of CRT. Safety precautions. Selection of the proper type of replacement.