Difficulty

Easy

Steps

2

Time Required

                          5 minutes

Sections

1

  • How to Fisher RS-90 fix AC hum
  • 2 steps

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Introduction

What you need

Step 1

              How to Fisher RS-90 fix AC hum
  • My system emitted a very loud 50 Hz AC hum which made it impossible to hear music
  • It is caused by ground loops which occur if the receiver and the speakers have different ground levels
  • To equalize the ground levels at the back of the receiver is a screw to apply a ground cable. Fix a cable there

My system emitted a very loud 50 Hz AC hum which made it impossible to hear music

It is caused by ground loops which occur if the receiver and the speakers have different ground levels

To equalize the ground levels at the back of the receiver is a screw to apply a ground cable. Fix a cable there

1024

Step 2

  • Plug the other end of the cable into the ground insert of one speaker
  • The hum should disappear

Plug the other end of the cable into the ground insert of one speaker

The hum should disappear

To reassemble your device, follow these instructions in reverse order.

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Author

                                      with 1 other contributor 


                    Chris Müller

Member since: 09/25/2018

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