Success!  A new IR emitter at the wormdrive encoder set it right.  Now all functions seem to be working and it sounds great with just a used MMC3 cartridge.  Hope to upgrade that soon.

Sonavar's advise was extremely valuable.  I doubt if I could have fixed this without his excellent posts.  For anyone attempting to repair one of these 8002's (and particularly starting as a novice such as myself) check out his incredible online instructions... concise and with great pictures showing exactly where to place probes for testing.  I do have to add that after all the work with components open on the bench I thought I was never going to get everything crammed back into the cabinet!  JM

That is great news.  I'm glad you got it back working again.  The Beogram 8002 is a great turntable to listen to.  I use mine all the time.

-sonavor

Hi,

That reminds me of my own Beogram adventures, some 12 odd years back! ?
Well done, with John’s invaluable help, but as we always said: pictures or it didn’t happen ?

A tradition here was to post plenty of restoration pictures, which was always really helpful.

Jacques

The second of two Beogram 8002s is one the bench.  I do have a few pics to share later but these would be better if I could actually say something useful.  Right now, I have restored it from no standby light to about 90+% functionality but I am at another impasse. The unit needed a new IR emitter at the wormdrive encoder (I replaced the two sensors also but had no actual data to suggest that was necessary).  LDR voltages are set at about 630 mV. I could not achieve satisfactory voltage at R72 on PCB1 so I tried replacing R64 with 10K and 20K trimpots.  This did not help.  Eventually, I tried replacing C19 with a 47mF/16V cap instead of the 1mF/63V cap originally on the board.  Initially, I thought this had helped as it did achieve higher voltage at R72 but was unstable and the tonearm still occasionally set down on the platter without a record.  I tested TR14, TR15 and TR16 but these were fine.  Finally, I completely removed R70 and went back to the original trimpot at R64 (4.7K  variable) and the original 1mF/63V cap at C19.  This combination seems to work best as the tonearm now sets down properly with a 45 or 33prm record and does not set down without a record.  However, there are still two remaining issues:

1. When not finding a record at the platter edge, the tonearm does not slow down but continues to scan across at initial speed.  However, if a 45 rpm size record is in place it DOES set down properly and plays through.  I am not sure this is a big deal but I believe it is designed to slow down.  The first of the two 8002s does this correctly.
2. At the end of a record the tonearm returns properly and the turntable motor shuts off but the platter is not induced to stop and continues to spin freely.  Again, not a terrible problem but I cannot figure out why it won't.

So... if anyone has some ideas, I would love to hear them.  I am way past my knowledge base on this and probably made some mistakes in the above discussion.  Again, Sonavor has been very helpful, obviously having been through possibly every issue this turntable can toss out. John M

I forgot to mention that I reflowed at least 40 solder points on the PCB2 board and a few points under the platter but didn't notice any changes.

JM

The Lift Circuit (IC1/TR9 is supposed to trigger the brake (TR32) so I would start there. Since you have a second 8002 you have a unit to compare. As to the change in arm speed once it gets over the platter, I do not recall that it does this normally as there is no reason it needs to. I know it doesn't slow down on the 4xxx Beograms.

Thank you.  I'll have another look at it for the brake.

Concerning the change in arm speed it sounds like I need to ignore that one.  The first 8002 I restored slows down for the search but you are correct, it doesn't need to do that.

JM

Finished!  Now knowing where to look (and finally examining the schematic) I found that the solder point at the base of  TR31 was elevated (see dental pick in image "pre") with the corresponding trace to R109 obviously broken.  I placed a short bridge between the two points (Image "post") and the brake function magically returned.

The turntable is now ready to be placed back in the case.  Thanks to everyone who have generously offered comments and suggestions.

John M

Hello:  Hope OK to ask for help with a 8000 someone gave me out of a shed.  I spent days getting new electrolytics in and reflowing solder joints on connector junctions and replacing the < > light bulb and rebuilding the lift plunger.  It worked for a few hours then I lost +15 and the platter now spins wildly fast nothing will stop it.  I even injected external +15 and regained some control over all the machine except platter speed which is like 100 rpm!  The tacho wheel lost some of its traces which I drew back on and the IC is reading some pulses but still speed is utterly unregulated.  Thank you for weighing in.