denon dp51f

[johnyk]

i was wondering if anyone knew which capacitors control the motor speed on this tt. sometimes works and sometimes not. im thinking it electrolytic but not sure. love the tt, but im a poor boy and cant afford to take it in to get fixed. thanks

[Alec124c41]

Te first step is to clean all contacts, controls, and switches with a good contact cleaner in their guts.

Cheers,
Alec

[johnyk]

thanks alec. that was the first thing i did. also checked all cold solder to make sure nothing came loose in shipping. worked great for first week of playing. then speed dropped of and came to a slow stop.the tt will start right up but after about 20 revolutions the platter will come to a stop.at times i can listen to a whole album with no problems at all. but most of the time it stops shortly after starting. i am going to replace the two large capscitors on the power board lead, as i suspect one of them would be dedicated to the motor. but i was looking for info to see if anyone knew specifically which caps directly relate to motor drive. regards john.

[Alec124c41]

Bearings aren't dry, are they?

Cheers,
Alec

[johnyk]

no. the platter turns nice and quiet and smooth.i listened to 5 albums last night with it coming to a stop a couple of times on the first one.i would just leave it and after a few seconds it would start back playing. was good for the rest of the night after that. seems there is a ghost in this machine of mine? other times it just wont start back up, and i cant listen to anything.

[johnyk]

well i replaced the 2 main caps on the power board, but no luck! does anyone have any suggestions on what i might try next? regards

[johnyk]

well, i got the tt back from the shop. 170.00 to apparently rebuild the motor.that didn,t work, but apparently did identify a couple of transistors that were bad.works good now. but will always leave me asking myself if it was just the transistors to begin with?thanks to alec for your suggestions on trying to help out with this problem.on a side note, i am just learning on using protractors. i have a pickering xv 15 with a 625 stylus, a stanton 881 eee, and a piezo ym135. all three have their separate qualities, but have found the piezo to bring out sounds that are barely audible with the other 2, even thou it is the least expensive by far. is it that i will have to keep buying cartridges untill i find one that gives me the detail of the piezo and the smoothness of the pickering and stanton? or is there a less expensive method?