Marantz MA500/U service manual please

KevinLee · 16th July 2006, 02:44 AM

Hello,

I am looking for a service manual for Marantz MA500U. (schematic and parts list)

If anyone has one please let me know. I can pay for a paper copy or an e-mailed copy would be appreciated as well.

Thanks

KevinLee

docfin · 16th July 2006, 10:03 PM

Marantz Model 500 schematics can help you?

anatech · 19th July 2006, 12:24 AM

Hi docfin,
Model 500 Marantz is a completely different 80 Lb animal. Earlier design and much higher build quality, discontinued in 1974.

-Chris

docfin · 19th July 2006, 06:55 AM

Hi anatech ,
thanks for info. I was disapointed witn number "500".

cheers
John

anatech · 19th July 2006, 03:22 PM

Hi John,
If you have the manual for the Marantz model 500, consider yourself blessed. Study the manual and schematic. Pay attention to the notes. This amplifier well ahead of it's time and can be a very good performer today.

-Chris

lumanauw · 20th July 2006, 06:52 AM

Hi, Anatech,

How does Marantz500 compared to Marantz300DC? Which one is better?

anatech · 20th July 2006, 12:37 PM

Hi lumanauw,
Now that's a tricky question!

Most 500's you will see could use a strip and rebuild (a proper one). It's a 32 year old amplifier at the most optimistic. It could be up to 37 years old now. If you follow the manual, all the transistors will be matched and the adjustments will be properly followed. There are three DC offset adjustments per channel as I recall. Two are interactive.

The 300DC is my current main amplifier (or an Eico HF-87 that misbehaved last time I tried it). That amplifier needs to be properly gone over as well, being about 25 years old now.

Assuming they are both working properly, the 300DC might have the edge for sound quality. It certainly can't dump power like the 500 can. I could be happy with either one as they both can outperform many other amplifiers. I have had both in my system, but many years apart and in different rooms. It is hard to draw a fair comparison.

I would dearly like to try out the new, current Marantz amplifiers. They are just wonderful to look at.

-Chris

lumanauw · 20th July 2006, 01:09 PM

Hi, Anatech,

No, I'm not playing tricks on you

I just never heard both of them.
I have both schematics (who could be sending me that?

), both are really good designs.
The 300DC is diamond output stage, the 500 is interesting, it is 2 loop of inverting sections, making total non-inverting.
Both designs doesn't look 20 or 40 years old to my eyes

They are fresh good looking designs.

anatech · 20th July 2006, 01:20 PM

Hi lumanauw,
I meant that the question you asked was difficult to answer. Sorry for the misunderstanding.

I have found that early Marantz designs were generally well ahead of their time. I didn't fully appreciate that at the time (young technician), but I did know they were built very, very well.

I think both amplifiers are very interesting designs. They have both withstood the test of time. One thing I love about the 300DC is the use of a regulator for each channel for the voltage amp sections. The value of this is lost on many people.

The Philips years were a complete waste of a brand name.

-Chris

KevinLee · 4th August 2006, 02:26 PM

Does anyone know where I can source a service manual for the Marantz MA500U mono amp?

Thanks

KevinLee

16th July 2006, 02:44 AM	#1
KevinLee diyAudio Member Join Date: Oct 2002 Location: Winnipeg MB Canada	Marantz MA500/U service manual please Hello, I am looking for a service manual for Marantz MA500U. (schematic and parts list) If anyone has one please let me know. I can pay for a paper copy or an e-mailed copy would be appreciated as well. Thanks KevinLee

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Marantz CD-84/CD-74 service manual?	bleachershane	Digital Source	5	4th March 2012 11:00 AM
marantz pm 84 service manual	mosfet1	Solid State	1	20th December 2010 07:47 PM
Marantz St-83 service manual	chicco_36	Digital Source	1	19th December 2010 08:24 PM
Marantz PM-50 Service Manual	senee	Solid State	0	6th September 2008 03:23 PM
service manual marantz sa-11 s1	ABO	Digital Source	3	28th February 2008 12:34 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

16th July 2006, 10:03 PM	#2
docfin Account Disabled Join Date: Apr 2006 Location: under the bridge	Marantz Model 500 schematics can help you?

19th July 2006, 12:24 AM	#3
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi docfin, Model 500 Marantz is a completely different 80 Lb animal. Earlier design and much higher build quality, discontinued in 1974. -Chris

19th July 2006, 06:55 AM	#4
docfin Account Disabled Join Date: Apr 2006 Location: under the bridge	Hi anatech , thanks for info. I was disapointed witn number "500". cheers John

19th July 2006, 03:22 PM	#5
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi John, If you have the manual for the Marantz model 500, consider yourself blessed. Study the manual and schematic. Pay attention to the notes. This amplifier well ahead of it's time and can be a very good performer today. -Chris

20th July 2006, 06:52 AM	#6
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	Hi, Anatech, How does Marantz500 compared to Marantz300DC? Which one is better?

20th July 2006, 12:37 PM	#7
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi lumanauw, Now that's a tricky question! Most 500's you will see could use a strip and rebuild (a proper one). It's a 32 year old amplifier at the most optimistic. It could be up to 37 years old now. If you follow the manual, all the transistors will be matched and the adjustments will be properly followed. There are three DC offset adjustments per channel as I recall. Two are interactive. The 300DC is my current main amplifier (or an Eico HF-87 that misbehaved last time I tried it). That amplifier needs to be properly gone over as well, being about 25 years old now. Assuming they are both working properly, the 300DC might have the edge for sound quality. It certainly can't dump power like the 500 can. I could be happy with either one as they both can outperform many other amplifiers. I have had both in my system, but many years apart and in different rooms. It is hard to draw a fair comparison. I would dearly like to try out the new, current Marantz amplifiers. They are just wonderful to look at. -Chris

20th July 2006, 01:09 PM	#8
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	Hi, Anatech, No, I'm not playing tricks on you I just never heard both of them. I have both schematics (who could be sending me that? ), both are really good designs. The 300DC is diamond output stage, the 500 is interesting, it is 2 loop of inverting sections, making total non-inverting. Both designs doesn't look 20 or 40 years old to my eyes They are fresh good looking designs.

20th July 2006, 01:20 PM	#9
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi lumanauw, I meant that the question you asked was difficult to answer. Sorry for the misunderstanding. I have found that early Marantz designs were generally well ahead of their time. I didn't fully appreciate that at the time (young technician), but I did know they were built very, very well. I think both amplifiers are very interesting designs. They have both withstood the test of time. One thing I love about the 300DC is the use of a regulator for each channel for the voltage amp sections. The value of this is lost on many people. The Philips years were a complete waste of a brand name. -Chris

4th August 2006, 02:26 PM	#10
KevinLee diyAudio Member Join Date: Oct 2002 Location: Winnipeg MB Canada	Does anyone know where I can source a service manual for the Marantz MA500U mono amp? Thanks KevinLee

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)