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HK 630 Receiver

66.188.227.91
Posted on May 27, 2020 at 11:16:40
Brian McGowan
Audiophile

Posts: 1635
Location: Wisconsin
Joined: December 16, 2004
 I just picked up at our local thrift store a Harmon & Kardon 630 as is for parts or repair for $19.99 + Tax ! It was in such nice shape on the outside & the Owners Manual plus the Brochure was also with it that I had to take a chance! Now it looks like it maybe will have to be a Parts unit as you can see where one of the Transformers got overly hot and dam near burnt the wires off! Also all the Big Caps around the the Transformers have bulged on the top! Otherwise everything else looks good! I got new fuses for it but figured best to not put them in as they most likely would just blow again! Will try & post pictures later Today! I have a feeling to replace the Transformers would be too costly or also very hard to do! Any advice would be great!

 

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RE: HK 630 Receiver, posted on May 29, 2020 at 10:27:47
JURB
Audiophile

Posts: 2056
Location: North Ohio
Joined: May 29, 2016
 Here we go.

The caps bulging at the top does not indicate they are bad.

Through every charge/recharge cycle the electrolyte emits a little bit of gas. Use an ESR meter on them.

You send it down here and I will give you a free estimate, for which I usually charge. If you want to sell it cool, I might take it.

Unless you are a really good tech, close to being an engineer, try not to condemn things too quickly.

 

RE: HK 630 Receiver, posted on May 29, 2020 at 11:08:48
Brian McGowan
Audiophile

Posts: 1635
Location: Wisconsin
Joined: December 16, 2004
 Sent you an email . Thanks for responding as well! I hope others will chime in!

 

RE: HK 630 Receiver, posted on May 29, 2020 at 12:21:14
6bq5
Audiophile

Posts: 4385
Location: SF Bay
Joined: August 16, 2001
 Power it up slowly on a variac and check voltages-

If the Power x-former is soft/damaged, there is some load that it pulling too much through it-

JURB is correct on the Caps -

I would also put some shorting plugs on the selected input as you bring it up...
Happy Listening

 

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