Audio Fix / setup help

Audio Pro C20 W: Check a non-PCM TV signal on C20 W

Audio Pro C20 W — Check a non-PCM TV signal on C20 W. Follow the exact documented route and keep the actual result.

Manufacturer-documented Reviewed 2026-11-09 · Revision 1

Follow these checks in Audio Fix →

When this guide applies

Exact Audio Pro C20 W. Existing optical or ARC connection and selected matching source confirmed; exact TV controls required. Only normal external user controls; no mains modification, chassis opening, reset or firmware installation.

Connection scope: Optical digital audio · HDMI / ARC / eARC audio. Symptom: There is no playback sound.

This is a documented check, not a diagnosis of your equipment. The model name does not confirm the selected input, mode, software or connected partner.

If your exact model or a required setting is unknown, use the “I don’t know” branch below. Do not apply a similarly named model’s instructions.

Checks and possible outcomes

Start at scope. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.

scope

Confirm the exact setup

Is the TV already connected to the matching selected C20 W input, currently sending encoded surround, and can you identify its documented stereo PCM setting?

Look for: Choose only a detail you can confirm.

  • Manufacturer-documented Audio Pro C20 W user manual ↗Controls / Playing connected devices / Specifications, PDF p4, p8–9 — The C20 W optical and TV/ARC inputs are specified for PCM. The source selector identifies OPT and TV separately.Exact C20 W, not original C20. · Source checked 2026-11-09

a1

Pause the TV programme

Pause playback before changing the output format.

Look for: Perform this one check and observe the actual response.

  • Manufacturer-documented Audio Pro C20 W user manual ↗Controls / Playing connected devices / Specifications, PDF p4, p8–9 — The C20 W optical and TV/ARC inputs are specified for PCM. The source selector identifies OPT and TV separately.Exact C20 W, not original C20. · Source checked 2026-11-09

a2

Choose stereo PCM on the TV

Use that TV’s documented audio-output setting to choose stereo PCM for the connected output. Do not use a setting whose meaning you cannot confirm.

Look for: Perform this one check and observe the actual response.

  • Manufacturer-documented Audio Pro C20 W user manual ↗Controls / Playing connected devices / Specifications, PDF p4, p8–9 — The C20 W optical and TV/ARC inputs are specified for PCM. The source selector identifies OPT and TV separately.Exact C20 W, not original C20. · Source checked 2026-11-09

result

Check the actual result

When the programme resumes quietly, does the selected C20 W input play audio?

Look for: Choose only a detail you can confirm.

  • Manufacturer-documented Audio Pro C20 W user manual ↗Controls / Playing connected devices / Specifications, PDF p4, p8–9 — The C20 W optical and TV/ARC inputs are specified for PCM. The source selector identifies OPT and TV separately.Exact C20 W, not original C20. · Source checked 2026-11-09

Possible result

Confirm the unknown detail first

Do not infer a source setting, installed cartridge, connector role, software state or partner capability. Obtain the exact documentation before continuing.

insufficient data

Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

    Possible result

    Keep the actual observation for support

    Record the exact model, source, input and last observed response. These checks do not diagnose a failed component. No reset, service work or blind update is prescribed.

    next support

    Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

      Possible result

      Checks completed — keep the observed result

      This records the observation in this particular setup, not a guaranteed cure, physical Audio Review test or measurement.

      steps completed

      Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

        All Audio Fix guides → · TV & Audio Finder →

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