Comments on: Fuse Blowing In MARANTZ PM-25 Amplifier Resolved

By: Joven Urbano

Joven Urbano — Sun, 19 Sep 2021 08:08:39 +0000

You did a very exhaustive job! Congratulations for your patience!

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By: Andrea Del Corso

Andrea Del Corso — Sat, 26 Jun 2021 09:58:55 +0000

Complimenti sig Parasuram S,ottimo lavoro,come al solito.
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Congratulations Mr Parasuram S, great job, as usual.

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By: Parasuraman S

Parasuraman S — Thu, 10 Jun 2021 08:11:38 +0000

In reply to Yogesh Panchal.

Many thanks for your comments and support, Yogesh Bai!

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By: Parasuraman S

Parasuraman S — Wed, 09 Jun 2021 15:08:46 +0000

In reply to Lawrence Mc Coig.

I looked through the web to know about this Octopus Tester as it is news to me. I shall make one and check. This is what I am planning to make : https://www.jammarcade.net/simple-component-tester-a-k-a-octopus-curve-tracer/

Many, many thanks to introduce me to some new device! I did use the oscilloscope, but could not make much progress. Many thanks again for your comments!

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By: Yogesh Panchal

Yogesh Panchal — Wed, 09 Jun 2021 14:38:27 +0000

Sir, you handled very hectic job this time.

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By: Lawrence Mc Coig

Lawrence Mc Coig — Tue, 08 Jun 2021 15:19:06 +0000

Would octopus tester and an oscilloscope have shown differences of componet circuits between working channel and channel with DC voltage and speed up locating trouble area?

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By: Parasuraman S

Parasuraman S — Tue, 08 Jun 2021 13:02:56 +0000

In reply to AdamS.

Yes, it is frustrating when you find that the circuit has been totally changed with the same model number. May be the PM-25 was a sought after number and they wanted to retain it, but went ahead and upgraded the inside to the latest version. In fact, the IC versions in the output was not preferred by many as most of us know the quality difference of music in a discreet circuit and that in an IC. But what to do, we, as committed technicians, might have to put up with all these!

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By: AdamS

AdamS — Tue, 08 Jun 2021 11:02:34 +0000

Another fine repair, Parasuraman!

I was going to say that the service manual is available for free download on the Hi-Fi Engine website, but then noticed that the PM-25 they list is a completely different model.

I do hate it when manufacturers re-use model numbers!

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By: Parasuraman S

Parasuraman S — Tue, 08 Jun 2021 04:40:39 +0000

In reply to Albert van Bemmelen.

Many thanks! Personally, I have never found anything so great in this Marantz, though people craved for it! I have handled many and did not like the designs and lay outs, especially for board servicing!

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By: Albert van Bemmelen

Albert van Bemmelen — Tue, 08 Jun 2021 04:07:12 +0000

In december 1980 Marantz became a brandname of Philips ... only Marantz America and Canada apparently stayed with Superscope. This way Philips could prevent Marantz from going broke. But after reading the problem they made refusing to provide you with any information that could help you here, they might as well go broke for all that matters! Or likely a good reason not to buy this brand?

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