Flundran

Looking for Yamaha Rm-804 schematics
« on: November 28, 2010, 02:42:46 PM »
Hello,
I am looking for schematics of the Yamaha RM-804 early 80's mixing console. I have the user manual, but it doesn't contain schematics. It looks like this:


Re: Looking for Yamaha Rm-804 schematics
« Reply #1 on: February 12, 2018, 05:46:02 PM »
Hi, I don´t want to open up a new thread for the same topic. I am looking for the service manual or schematic for this cute little mixer, too. :)

Re: Looking for Yamaha Rm-804 schematics
« Reply #2 on: February 12, 2018, 07:10:52 PM »
Yamaha themselves are usually very helpfull , definately worth trying your local branch if they have one ,they have sent me techicncal support and  parts from the Uk before.

Keala

Re: Looking for Yamaha Rm-804 schematics
« Reply #3 on: February 12, 2018, 07:15:50 PM »
Yamaha themselves are usually very helpfull , definately worth trying your local branch if they have one ,they have sent me techicncal support and  parts from the Uk before.

About a year ago i asked Yamaha for the RM-804 schematics, but they couldn't help me

Re: Looking for Yamaha Rm-804 schematics
« Reply #4 on: February 12, 2018, 09:00:21 PM »
Yeah was a pm1000 I fixed up for a guy ,I guess the documentation for some of their stuff wound up dumped or something .

Re: Looking for Yamaha Rm-804 schematics
« Reply #5 on: February 13, 2018, 02:37:41 AM »
Thanks for your response. I have seen that someone has sold the service manual on ebay. You can still find a photo of the cover from this auction online. I will call up Yamaha Germany... :)

tmuikku

Re: Looking for Yamaha Rm-804 schematics
« Reply #6 on: February 13, 2018, 04:41:10 AM »
Hi,

I uploaded RM-800 schematics to tecnical documents https://groupdiy.com/index.php?topic=44874.msg867971#msg867971
I don't know how similar this is to 804.

I Regret selling this nice mixer... :)

ps. I just checked google about the 804, seems to be completely different variety (by the looks) than the 800..

Re: Looking for Yamaha Rm-804 schematics
« Reply #7 on: February 13, 2018, 05:22:36 AM »
Hi,

I uploaded RM-800 schematics to tecnical documents https://groupdiy.com/index.php?topic=44874.msg867971#msg867971
I don't know how similar this is to 804

ps. I just checked google about the 804, seems to be completely different variety (by the looks) than the 800..

Thanks a lot, but the RM 804 is pretty different inside, too. The RM 804 is close relative to RM 1604 & RM2408, kind of a downsized version of it. (no 48V, no pad, fixed eqs, limited routing etc...) The mic preamp and some other units are pretty similiar, but the RM804 uses only 4558 op amps, no TA7322P.

You can find info. about the RM 2408 here:  http://www.florian-anwander.de/yamaha_rm2408/
« Last Edit: February 13, 2018, 05:25:42 AM by rock soderstrom »

Re: Looking for Yamaha Rm-804 schematics
« Reply #8 on: February 20, 2018, 01:50:23 PM »

Hi my fellow groupdiyers, I have found a commercial source for the service manual for the RM 804. It costs 23,50€.
Any interest? Groupbuy?   :D

 

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