[hcraig244]

Sounds like some progress…..change TR17 out and you should be good to go for the FM issue, dillen from the site always advocates the “half it” approach which is to go half way into the circuit and disconnect/test then work back or forth from that position…..always works for me ;¬)

Craig

[hcraig244]

Hi

just seen your post, this can most likely be repaired, see my post in the forums for Beovox for the procedure

hcraig

[hcraig244]

this?

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[hcraig244]

Not quite sure what your describing here….do you mean the tone arm?….or something else?

Craig

 

[hcraig244]

Also bear in mind that some components can measure up fine when tested, but fail under load…..I’ve had this issue in the past, and replacement parts from suspect suppliers should be avoided…early transistors can still be found as old stock and are a safer bet than ebay

Craig

 

[hcraig244]

if you disconnect all users from the 15v power supply rail and measure the output is the problem still present?

Craig

[hcraig244]

Have you checked for broken traces and dry joints…..it’s got to be something obscure 👀

[hcraig244]

Replace ZF9,1V……..see if that helps, if not then at least you can eliminate it from the problem

Craig

[hcraig244]

Ive had to think hard about this reply so as not to offend anyone who has been good enough to give you the technical advice your currently in receipt of, however it appears said advice is  condemning a valuable deck in a  somewhat  off hand manner. The power supply stabilisers and associated reed relays are a little daunting but they can be repaired/restored…even the relay coils can be rewound….I have no doubt Nick is the man for the job…..given his B&O service engineer background ;¬)

 

[hcraig244]

Ok….I dont have a manual for the type 5521, however the image you posted of the 5513 position sensor suggest to me that it may be very similar….the speed control is via 1RL1

[hcraig244]

I dont understand that last post?

[hcraig244]

Ok…..when you press start does the turn table rotate?…..also as Mark suggests does the transport motor drive with the belt removed, if so this would prove a fair amount of the unit is operational….hopefully it is an issue withthe belt slipping as this will be an easy fix for you…

Craig

[hcraig244]

Its unlikely that lubricating the carriage drive screw and associated wheel would cause the problems you describe, I would take a close look at the carriage position sensor and ensure it hasn’t become detached or damaged..see the attached blog from the beolover….his issue was different to yours but i suspect it could be related…send some pics of your unit for us to view

https://beolover.blogspot.com/2016/04/beogram-4002-5513-non-working-end-groove-detection.html

[hcraig244]

Stephen

where are you located….

craig

[hcraig244]

Mark

I wondered about that when I noticed it on your avatar,…..very innovative, im impressed

craig

[hcraig244]

Closed this up today and powered up in the workshop……considering its 50yrs on the planet, and some not inconsiderable restoration….some members may remember its condition when it came into my possession for a £60 outlay…..it still sounds extraordinarily good.

 

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[hcraig244]

https://beolover.blogspot.com/2016/03/beogram-400040024004-relays.html

Rudy above supplies some…they are pricey as they come from the USA, I’m pretty sure I bought some from someone in the UK a couple of years ago…..look around.

Craig

[hcraig244]

I would start with the relay that switches between the two speeds….the contacts suffer over time with age, replacements are readily available but will require soldering……it may not be your issue but given the age of these units I would change it out just to eliminate it…..

[hcraig244]

No worries Steve…..we like a bit of a challenge in here, 4.7vdc is very low for the supply to the logic IC’s I can’t remember the actual min voltage for them but 5.something comes to mind for reliable operation send pics 👍

[hcraig244]

I can see your a bronze member….upgrade to silver and download the Beogram_4000_training_course_notes.pdf which where gifted to the site by a former B&O service engineer, they are very helpful and informative…a little clipped in places but mostly complete…..

Can you confirm that the platter still spins and the control panel indicates a start at 33rpm ? …..also measure the 24vdc and 6vdc power supplies as the unit starts up and look for a drop in voltage…often the voltage regulator 2TR6 can read good but can be pulled down on load…..Have you changed out the power supply capacitors? these should be replaced as a matter of course in any event.

craig

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