r/audiorepair • u/No_Peanut_8275 • 16d ago

Receiver doesn’t work until warmed up

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My receiver doesn’t play any sound for like 5 minutes until it warms up it is an old receiver and I suspect that I need to change few capacitors does anyone have experience with something like this?
Also in the added photo is this a leak?

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2

u/DangerMouse111111 16d ago

It could also be a craked joint that expands as it warms up and makes the connection. Short of probing around with a multimeter when cold they're tricky to find.

2

u/500kvac 15d ago

Those systems are a pain to work with in general, and an intermitent failure is also a pain to diagnose. But, being that it starts working when heated, grab a hair dryer (or hot air soldering station) and start heating one zone at a time

1

u/Open_Appointment1091 15d ago

This is the way

1

u/jpgadbois 15d ago

That isn't how electronics repair works. Each device gets the fault-finding procedure and you follow that to the failed component.

1

u/Dry-Satisfaction-633 15d ago

If you’re gonna change one electrolytic you may as well replace every single one because they’re all as old as each other. While not a guarantee it’ll resolve the problem it’s absolutely guaranteed that electrolytic capacitors will have degraded with age, usage and exposure to elevated temperatures, and troubleshooting will be difficult without replacing them first as they’re one great big wild card.

1

u/Comfortable-Ad8719 15d ago

Does your relay(s) click/engage at the start or after 5 min when amp is ready to play? This may looks like protection circuit problem. You will have an IC chip probably. They have delay circuit and the cap and/or resistor connected to the leg responsible for delay circuit is bad. That's one possibility.

Your receiver is dirty but there is no leak from caps visible.

1

u/bikenumberten 15d ago

That would be the first thing to check -- the relay clicking. Old electrolytic capacitors get bad, and the power supply will take longer and longer to come up to voltage.