This set of Audio Video Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Troubleshooting in VCRs”.
1. A VCR is an electromagnetic device.
a) True
b) False
View Answer
Explanation: The above statement is false. A VCR (Video Cassette Recorder) is an electromechanical device. It has the capability of recording audio or video from a television. The video is stored on a magnetic tape and can be played back as per the wish of the user. The complexity of controls is very large because the recorder has lots of electromechanical controls.
2. Which of the following serves an important part in troubleshooting in VCRs?
a) Aspect ratio
b) Integration
c) Substitution
d) Playback section
View Answer
Explanation: Substitution serves an important part in troubleshooting in VCRs. Most of the troubles can be found by simply substituting the parts with some other device. A person having a plentiful theoretical knowledge about the functioning of the device parts can diagnose the problem with much more ease than that of a person with less knowledge.
3. Which special equipment is used to test a VCR?
a) Dual-trace delayed sweep oscilloscope
b) Digital storage oscilloscope
c) Digital phosphor oscilloscope
d) Mixed signal oscilloscope
View Answer
Explanation: The VCRs (Video Cassette Recorder)work on a similar bandwidth as the TV receivers. The special equipment called Dual-trace delayed sweep oscilloscope is used to test a VCR. A procedure should be followed to check the free running frequency of the scanner and the capstan motor. For the procedure a digital frequency counter is needed.
4. Which section needs to be checked for faults if the playback works normally with the cassette and does not work properly with its own recording in troubleshooting in VCR?
a) Playback
b) Video
c) Audio
d) Recording
View Answer
Explanation: The easiest method to find the fault is by using either a test cassette or a blank cassette. If the playback works normally with the cassette and does not work properly with its own recording, the recording section needs to be checked for faults.
5. Which section needs to be checked for faults if the playback is working abnormally with its own recording but the same recording works perfectly on another device in troubleshooting in VCR?
a) Recording
b) Video
c) Audio
d) Playback
View Answer
Explanation: A blank cassette or test cassette is used to find fault in VCRs. A method called playback method helps us to remove a particular section from the field of suspicion. If the playback is working abnormally with its own recording, but the same recording works perfectly on another VCR, then the playback section needs to be checked for faults.
Sanfoundry Global Education & Learning Series – Audio Video Engineering.
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