Philips 4307 reel to reel advice

[Arthur44]

Hello

I have a Philips 4307 reel to reel to reel and thought I would try to get it working.

I have followed advice I found on the forum and have cleaned up all the old rubber and used O rings when reassembling the clutch's. I am waiting on the delivery of the new belts.

In the bottom of the case when I opened it up was a a small plastic part of which I have added two pictures to the attachments. I am not sure which part of the player it has come from or if it is important but I do not know. It is 5mm x 3mm.

Also I have attached a picture of a loose wire which looks like it may be a ground. Again I am not sure.

Any advice on this would be much appreciated.

Many thanks.

[davph30]

Hi

I've just restored a N4308 which is very similar.

Loose wire is a ground from the sheet that sits between the front panel and pcb.

Sorry don't recognise the plastic parts though

Dave

[af024]

Perhaps the plastic bit formed some kind of brake?

[Arthur44]

Thank you very much to both of you for taking the time to reply.

I can see now where the wire goes so that great.

Can't see any other bits like the piece of plastic anywhere else on the machine.

Will keep looking.

Thanks again for your help. Much appreciated.

[DMcMahon]

Difficult to really tell from the first 2 photos but the plastic part does look very similar to plastic/rubber brake pads used on some recorders.

Looking at the N4307 Service manual drawings cannot easily see this part, could there be a piece missing/broken off from one side, i.e. could it be item 99 "Pause brake shoe" ?

David

[Arthur44]

Hello David

Many thanks for your reply.

Sorry about the pictures. I have had another go and attached a better image.

I am not yet familiar with the parts in the machine so i will see if I can obtain the service manual and take a look at item 99 as you suggest.

Thanks again for your help.

[DMcMahon]

Example of somewhat similar rubber part from a Grundig.

I have not seen similar part on the Philips machines that I have.

David

[Arthur44]

Many thanks David for your reply.

I see what you mean it does look similar but I can't see anything on my machine like that.

It is more of a hard plastic than rubber.

Hopefully the belts will turn up next week and I can see how well it works, if at all. The motor runs which is good.

I have found a service manual on eBay, its in german but that will be OK.

Thanks again for taking the time to help.

[Cobaltblue]

The N4307 manual is available here for 1.99

https://www.service-data.com/product...13/6162/m20713

Cheers

Mike T

[Arthur44]

Hello Mike.

Many thanks for the link.

Much appreciated.

[Arthur44]

Hello again,

Looking at the manual I have noticed the above mentioned pause brake shoe is missing from the machine. I think it has gone the same way as the belts and clutch rubber.

Does anyone have any suggestion on what to use to make a replacement?

Thanks again for all replies.

[dazzlevision]

This is what the pause brake should look like...

[Arthur44]

Many thanks for your reply and the image of the pause brake.

That will be very useful.

[DMcMahon]

See if your white plastic piece will fit onto the metal mounting for the pause brake, if it does you may be able to find a piece of suitable plastic to glue to your piece.

Maybe dazzzlevision can provide a photo showing the pause brake actuated to understand which part of the reel table it touches.

David

[Arthur44]

Thanks David.

The plastic bit I have is a bit too small to fit over the metal mounting for the pause brake.

I have some blocks of rubber so I might try to cut something similar from that.

Thanks again for your help.

[dazzlevision]

Originally Posted by DMcMahon

Maybe dazzzlevision can provide a photo showing the pause brake actuated to understand which part of the reel table it touches.

David

Here it is...

[Arthur44]

Many thanks for posting the image.

It is very helpful. I will try to make something similar.

I appreciate all the help.

[Arthur44]

Hello again

Thanks for all your help.

The belts arrived today and I have put them on.

There were four belts in the set.

The big one seemed quite obvious and I followed an image I found to route it.

There are then three smaller ones - two the same size and one smaller.

The two the same size I put one on the top of the machine as shown in belt1.jpg and the other on the counter as shown in belt2.jpg

The third one I put under the machine on the flywheel. belt3.jpg

I also seem to of dislodged a spring from somewhere which I have shown in image spring.jpg. It is just under 3/4 inch long. Can't see where it has come from.

I have an issue where the flywheel is catching on the metal below it. I have indicated this on the belt3.jpg

Is this a common issue?

Thanks again for all the help.

[DMcMahon]

To fit belt 3 to the bottom of the flywheel did you loosen/dislodge the bracket that flywheel is fouling.

Normally (talking generally not Philips specifically) there is some some sort of bearing on the end of the flywheel shaft/capstan that sits in the shaft cavity (held in by grease) that will make contact with the bracket (often a plastic pad on the bracket that the greased bearing makes contact with).

The bearing is often just a simple small ball bearing, looking at the N4307 drawing its shows a thrust bearing item 111 that looks like it may go there.

So check to see if the thrust bearing is in position, the ball bearing version can easily fall out when flywheel is disturbed.

David

[Arthur44]

Hello David

Thanks very much for your reply.

I have removed the bracket completely and the thrust bearing item 111 is present.

I reassembled and it looks like the flywheel is not running very true which is causing it to catch on the bracket. I will see if there is anything I can do.

On a good note I found where the spring had come from.

Thanks very much for the help.