The Workbench

Re: Bringing new life to a Beomaster 8000

Mohawk — Sun, 03 Jul 2011 15:35:31 GMT

Hi Chartz

You got a PM!

Haha yes working with the LED displays is kind of a hard and time consuming job. But it was worth it to replace all the segments with new LEDs to get the readouts working nice again :D

/Fredrik

Re: Bringing new life to a Beomaster 8000

chartz — Fri, 24 Jun 2011 17:27:37 GMT

Hi,

Glad to see you're still here!

Can you tell us how much these PCBs set you back? I, for one, am very interested but unlike you, I'll keep the old components... save those horrid trimmers and electrolytics of course!

The display PCB looks great too. Didn't you have a hard time unsoldering the LED displays, one year ago?

Re: Bringing new life to a Beomaster 8000

Mohawk — Fri, 24 Jun 2011 04:16:48 GMT

Hi all!

Chartz:

Its amazing how time flies hehe. Im doing fine. The BM is up and running. Ive found a pair of beovox ms150.2 to match the BM with. They work nice with the BM but they will need a refoam soon. Everything sounds great together and it was worth the job to restore this BM.

Step1:

Im glad to hear this positive comments about my replacement boards. I had no choice since the original poweramp boards were so damaged by an uncareful repair technichian. The new boards fits exactly as the originals. If anyone want new poweramp PCBs for their BM8000 restoration I can have them manufactured for you.

To the question...I simply cut the old spline washers carefully and discarded them...Then I bought new ones like these https://www.elfa.se/elfa3~se_sv/elfa/init.do?item=48-319-54&toc=20905

I can get back to you later about what switches I used for that keyboard (im not at home for the moment).

Regards

Fredrik

Re: Bringing new life to a Beomaster 8000

Step1 — Fri, 24 Jun 2011 03:10:39 GMT

Yes this is a wonderful job, those boards are incredible, something I wouldn't have attempted that's for sure!

I have to say I had the same idea with those click switches to replace the originals but I accept the award goes to Mohawk as he posted first!

SO my question to Mohawk is how do you remove those spline washers (holding the keyboard) without risking damage the alu pins, and have you found any pop switches with the same clicky feel to the originals?

Re: Bringing new life to a Beomaster 8000

chartz — Fri, 24 Jun 2011 00:12:19 GMT

Hi Fredrick!

One year since we last heard of you and your superb restoration job...

Any news? Are you okay?

Re: Bringing new life to a Beomaster 8000

Mohawk — Thu, 24 Jun 2010 02:27:14 GMT

Hi Menahem

Thanx for the kind words about my work on the BM!

I will upload more pics when Im done with the rebuild...

I agree with you. Beoworld with all its members have become a huge (and still growing) knowledge base with the ability to solve almost any issues with beo gear. Together we will move the limits forward of what is possible.

Its also fun that BeoWorld encourage those with little or no technical experience or interest.

/Fredrik

Re: Bringing new life to a Beomaster 8000

yachadm — Wed, 23 Jun 2010 06:14:18 GMT

Fredrik

That is fantastic work you have done! You can be very proud of yourself!

I think I can see a trend developing here at BeoWorld. As the years go on, the individual dedication of some members really inspires others to try things which were never done before, and not only try, but also succeed!

I think that the general standard of ability of members has increased enormously since BeoWorld started, and that is infectious in itself!

Well done, and I'm looking forward to see your machine exceed all expectations.

Menahem

Re: Bringing new life to a Beomaster 8000

Mohawk — Tue, 22 Jun 2010 03:15:31 GMT

soundchoice70:

Good to hear its all coming together.... albeit slowly...

And nice indeed, some MS150's, you managed to find some congratulations.

Thanx hehe, yes I have searched for a nice pair of MS150s for years. Cant wait until I can enjoy them together with the 8000 after all these hours in the workshop with the BM.

/Fredrik

Re: Bringing new life to a Beomaster 8000

Mohawk — Tue, 22 Jun 2010 03:09:52 GMT

Hi Premiumverum

Very well spotted :D

Yes I used 10uF tantals in the preamp to replace the 10uF electrolytics in the signal path. I couldnt find any film caps that would fit the spacing on the preamp pcb. The input caps on my "new" output amps are 4.7uF wima film caps as you noticed.

My policy through the rebuild of my BM8000 was that I used ceramic caps up to 1uF and film caps from 1uF to about 10uF if there is space enough on the pcb. For higher values I use tantalium caps or electrolytics in the signal path if I cant fit ceramic or film types. I like the tantals more than electrolytes.

/Fredrik

Re: Bringing new life to a Beomaster 8000

Premiumverum — Mon, 21 Jun 2010 11:43:20 GMT

Hi Frederik,

I am in the process of ordering new caps for my BM8000, I noticed in the service manual there are quite a lot of electrolytics and tantalum caps in the signal path.

I took a close look at your pictures, I saw you used some tantals in the preamp, and a film for the 4,7uF on the power amp board?

What did you do with the signal path capacitor types? I am thinking of ordering WIMA film caps and panasonic electrolytics for the 10uF signal path caps (film gets too expensive for me here)

Re: Bringing new life to a Beomaster 8000

soundchoice70 — Sat, 12 Jun 2010 04:43:29 GMT

Good to hear its all coming together.... albeit slowly...

And nice indeed, some MS150's, you managed to find some congratulations.

Re: Bringing new life to a Beomaster 8000

Medogsfat — Fri, 11 Jun 2010 18:32:55 GMT

Mohawk:

Ive also got hold of a pair of MS150 speakers to match the set later...

/Fredrik

Nice

Re: Bringing new life to a Beomaster 8000

Mohawk — Thu, 10 Jun 2010 02:11:17 GMT

Hi Laurence

Its going slowly forwards...havent had so much time lately to be in my workshop. Im going through all the adjustments in the service manual at the moment.

So far I have only tested it in my workshop with a pair of beovox 2702 and it sounds really great and powerful. Im very happy with the sound quality

After reassembly and adjustments I will test it properly in my music room together with my M70 speakers...Ive also got hold of a pair of MS150 speakers to match the set later...

/Fredrik

Re: Bringing new life to a Beomaster 8000

soundchoice70 — Wed, 09 Jun 2010 10:18:53 GMT

Hey Fredrik,

So how is your amazing rebuild project coming along? How does she sound?

Laurence

Re: Bringing new life to a Beomaster 8000

Mohawk — Sun, 30 May 2010 05:46:25 GMT

Thanx Chris

It will soon be time to reassemble everything. At the moment Im going through all the adjustments in the service manual to make sure everything is properly set.

/Fredrik