Hi,
I am experiencing a specific problem on my gloriosus DSP A1.
When I switch it on the right surround channel is mute and some times also the left surround channel and (one time also the central channel).
If I encrease the volume louder and louder the mute channel start to sound with a bad initial "crack sound". After that the channel works fine.
I suppose it's a cold welding problem or an electrolitic condenser problem. And it is affecting the 3 effect channels only.
How can I fix it? Thanks in advance.
Comments
When I switch it on the right surround channel is mute and some times also the left surround channel and (one time also the central channel).
First make sure if ALL channels are mute sometimes. In your case, it seems relays problem due to a layer of black oxide called
Ag2O affecting the contact conductivity. Open ALL speaker relays, removing black oxide by glasses repairing screwdriver.
If I encrease the volume louder and louder the mute channel start to sound with a bad initial "crack sound". After that the channel works fine. Time needs for oxide to allow
electrical signal to pass through if an oxide layer is not too thick.
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Thanks a lot. I'll do my best to identify the speaker relays in the service manual and to clean them.
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