Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

replacing a DC motor with PLL control
replacing a DC motor with PLL control
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 30th January 2011, 04:39 PM   #1
lensmanMk2 is offline lensmanMk2  United Kingdom
diyAudio Member
Join Date: Nov 2008
Default replacing a DC motor with PLL control

hi everyone

well after 30 years of use my turntable has given up the ghost, more specifically the motor has, bit of a shame as i recapped the board and replaced some faulty transistors not so long ago

anyway deck is a mitsubishi LT5V linear tracker. the motor is a dc servo with PLL, and seems to have PLL integrated into the motor,taking it apart reveals a small circuit board on the base of the motor. plus on the schematics the trail ends at a box marked "dc servo assembly/motor" and no bits i can see on the main schematic that would mark a servo system, but i am not exactly an expert when it comes to following some circuit designs!

on the schematic it has the standard 12v + - input plus two other pins marked: VR and C, any idea what these mean?

so im hoping i could try and track down a suitable motor from the likes of maxon or hurst to replace it, as mitsubishi stopped producing these motors about 20 years ago.

so does anyone know of a motor type that could be used as a drop in replacement? size isnt really a factor as i could place it externally in a motor pod, just love to get it up and ruuning again!

any help much appreciated

Last edited by lensmanMk2; 30th January 2011 at 04:43 PM.
  Reply With Quote
Old 30th January 2011, 10:29 PM   #2
indianajo is offline indianajo  United States
diyAudio Member
indianajo's Avatar
Join Date: Jan 2010
Location: Jeffersonville, Indiana USA
The charity resale shops around here have VCR's stacked up like cordwood at $5 apiece. Probably the same somewhere in the UK. The capstan motors on those run very stably. Don't know what technology or how much PCB you have to saw up to get to the driver circuit, but I bet with a suitable pulley it would make a very nice turntable motor.
I'm looking for an expert to tell me something about them. I'd like to put a pulley on one to drive a vibrator scanner in the H182 organ, with a variable speed feature to emulate a leslie speaker without the $700 tarriff for a real one, and the 1 m x 400 cm footprint.
I've already got a digitec quad 4 rack effect. It has a leslie emulator, but lacks the speed up coast down between the speeds feature some musicians use, like S. Wynwood on "Glad".
Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,1.3K, SP2-XT's, T-300 HF Proj's, Steinway console, Herald RA88a mixer, Wurlitzer 4500, 4300

Last edited by indianajo; 30th January 2011 at 10:36 PM.
  Reply With Quote


replacing a DC motor with PLL controlHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
DC motor control vmps Analogue Source 1 29th July 2010 06:16 PM
DC motor built in PLL qwertyadam Analogue Source 0 7th October 2008 02:07 PM
DC motor speed control winggo Analogue Source 13 25th August 2008 01:48 AM
PLL motor control HFGuy Analogue Source 4 14th July 2005 03:12 PM
help anyone got a pll schematic for a dc motor fantasia Analogue Source 0 25th June 2004 01:42 AM

New To Site? Need Help?

All times are GMT. The time now is 10:14 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio