CTS AV System Troubleshooting and Maintenance 4

Question 1

A projector displays a green tint across the entire image. After confirming the source signal is correct, what is the most likely cause?

Accepted Answer

Incorrect white balance or color matrix setting on the projector

Answer

An incorrect color matrix or white balance setting on the projector is the most common cause of a full-screen color tint when the source signal checks out.

Question 2

During a presentation, audio from a wireless microphone cuts out intermittently. The battery is new and signal strength appears strong. What should be checked next?

Accepted Answer

Check for RF interference from nearby Wi-Fi or other wireless systems on the same frequency band

Answer

RF interference from co-located wireless systems or Wi-Fi networks operating in the same frequency band is a primary cause of dropouts even when signal strength appears adequate.

Question 3

A touch panel control system is unresponsive after a power outage. The panel shows a solid amber LED. What is the recommended first step?

Accepted Answer

Power cycle the control processor and allow it to fully reboot

Answer

A solid amber LED on many control panels indicates the processor is offline or initializing; power cycling the control processor is the appropriate first recovery step.

Question 4

An AV technician notices that a ceiling-mounted speaker produces distorted audio only at higher volume levels. The amplifier clip indicator does not light. What is the most probable cause?

Accepted Answer

Loose or damaged speaker cone

Answer

Distortion that occurs only at higher SPL without amplifier clipping typically indicates a mechanical issue such as a loose or damaged speaker cone or surround.

Question 5

A video conferencing system shows the far-end participants with a noticeable lip-sync issue where audio leads video by about 200 ms. What adjustment corrects this?

Accepted Answer

Apply audio delay of 200 ms within the AV system's signal processing

Answer

When audio leads video, adding an equivalent audio delay through the DSP or AV processor realigns the two streams to correct lip-sync.

(CTS) Certified Technology Specialist Practice Test

(CTS) Certified Technology Specialist Practice Test

CTS AV System Troubleshooting and Maintenance 4