Search found 20 matches

by Wolfgang Felber
Tue Jan 08, 2019 3:53 am
Forum: General Vinyl
Topic: SP10 Troubles
Replies: 107
Views: 19435

Re: SP10 Troubles

Hello to all SP10MK2 owners, I finally got mine running but had problems locking onto speed, so in my haste I tested the oscillator using C1 and C2 on the drive board, bang, 32 volt fuse popped, replaced fuse and all I get is the clicking of the brake solenoid. Platter doesnt spin, I have put some o...
by Wolfgang Felber
Tue Dec 11, 2018 1:10 pm
Forum: General Vinyl
Topic: SP10 Troubles
Replies: 107
Views: 19435

Re: SP10 Troubles

Hi Nick, the SP10 Mk2 that I have has been modified by the ABC in OZ. I will attach some more photos.
by Wolfgang Felber
Sun Dec 09, 2018 11:12 am
Forum: General Vinyl
Topic: SP10 Troubles
Replies: 107
Views: 19435

Re: SP10 Troubles

Hi Nick, will try sending a couple of photos.
by Wolfgang Felber
Sun Dec 09, 2018 6:32 am
Forum: General Vinyl
Topic: SP10 Troubles
Replies: 107
Views: 19435

Re: SP10 Troubles

Hi nic thank you for taking pity on an old fool. I would like to send you an image but every time I drag the image accross , it tells me the file size is too large, I tried zipping but that didnt work either. Can you tell me what size file I can send

Regards
Wolfgang
by Wolfgang Felber
Thu Nov 29, 2018 11:33 pm
Forum: General Vinyl
Topic: SP10 Troubles
Replies: 107
Views: 19435

Re: SP10 Troubles

Hi Nick, tried a 1.1K resistor in parallel with the 4.7k, unfortunately it didnt make any difference. I dont know if I mentioned it before but I am a Plumber not an electronics engineer. I have been struggling to get some of these waveforms that are in the service manual. I have a pretty good knowle...
by Wolfgang Felber
Tue Nov 27, 2018 5:44 am
Forum: General Vinyl
Topic: SP10 Troubles
Replies: 107
Views: 19435

Re: SP10 Troubles

Just to be clear, I am looking at the logic circuit Schematic and it it resistor R261 47k which is connected to TR220. Correct.

Regards Wolfgang
by Wolfgang Felber
Mon Nov 26, 2018 10:16 pm
Forum: General Vinyl
Topic: SP10 Troubles
Replies: 107
Views: 19435

Re: SP10 Troubles

Hi Nick, will try that tonight, something I did notice last night wast that when set to 33 or 45 the strobe was flickering slightly but when set on 78, no flickering, weird.I also noticed that when the power supply voltage is raised to 32.5 volts the platter slows down and when the voltage goes lowe...
by Wolfgang Felber
Sun Nov 25, 2018 11:36 pm
Forum: General Vinyl
Topic: SP10 Troubles
Replies: 107
Views: 19435

Re: SP10 Troubles

Hi all, it has been a while since my last post, good news is I managed to get the SP10Mk2 running at all speeds, the problem was a broken wire on the coil in the motor, I re-soldered it and away she went at normal speed. I still have a problem though, it doesnt seem to lock onto the speed, it runs a...
by Wolfgang Felber
Fri Mar 30, 2018 1:10 pm
Forum: General Vinyl
Topic: Technics Sp10 Woes
Replies: 19
Views: 3975

Re: Technics Sp10 Woes

Hi Nick, long time no talk, good news on my side, got the SP10Mk2 going. the problem was a broken wire (very fine wire) located inside the motor which sends a signal back to the, I am assuming the PLL. suffice to say after a long job pulling the motor apart and locating the end of the wire and re-te...
by Wolfgang Felber
Tue Dec 19, 2017 11:23 pm
Forum: General Vinyl
Topic: Technics Sp10 Woes
Replies: 19
Views: 3975

Re: Technics Sp10 Woes

Hi Nick, I tried what you suggested last night, unfortunately it did not make a difference, I looked at the circuit diagram again and noticed there are two transistors that feed IC 9 and 10. do you think it would be a good idea to do the same to the resistor that feeds tr 220 as well?
by Wolfgang Felber
Tue Dec 19, 2017 7:07 am
Forum: General Vinyl
Topic: Technics Sp10 Woes
Replies: 19
Views: 3975

Re: Technics Sp10 Woes

Hi Nick, can you please point me in the right direction, possibly a Transistor number and a resistor number.
by Wolfgang Felber
Mon Dec 18, 2017 10:04 pm
Forum: General Vinyl
Topic: Technics Sp10 Woes
Replies: 19
Views: 3975

Re: Technics Sp10 Woes

Will try that tonight, thank you.

Wolfgang
by Wolfgang Felber
Mon Dec 18, 2017 11:55 am
Forum: General Vinyl
Topic: Technics Sp10 Woes
Replies: 19
Views: 3975

Re: Technics Sp10 Woes

Hi all, tried the 1.5K resistor in parallel with 4.7k resistor no 221, success, got it to stop and start when required. Will try a few other values around that mark to see if I get a better response. My next problem is it still runs at hyperspeed, no control over speed. the speed switches are workin...
by Wolfgang Felber
Tue Nov 28, 2017 10:35 am
Forum: General Vinyl
Topic: SP10 Troubles
Replies: 107
Views: 19435

Re: SP10 Troubles

Just a question to all, I used 74LS73AP JK Flip Flops when I replaced the IC's in the SP10MK2. I have read that there are negative and positive flip flops, if I use the wrong ones, will that affect the result?
by Wolfgang Felber
Mon Nov 27, 2017 10:19 pm
Forum: General Vinyl
Topic: SP10 Troubles
Replies: 107
Views: 19435

Re: SP10 Troubles

Sorry Nick, my mistake, all those test results are from the boxes on the service manual, I tested them to see if there was a deviation from what was stated and I noticed there were a few that were completely different. I dont know if those results mean anything. I will try and use the scope try get ...