Technics 1210 problems! - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

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

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
Reply
 
Thread Tools Search this Thread
Old 8th September 2006, 09:27 PM   #1
diyAudio Member
 
Join Date: Sep 2006
Exclamation Technics 1210 problems!

Hi,

I have a problem with my technics, the strobe light flashes on and off when the platter turns and there seems to be less torque. Do you think I should replace q1 (i have 27,27 and 36 volts off Q1)?


any help would great

Thanks

djruntime
  Reply With Quote
Old 8th September 2006, 09:36 PM   #2
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
Hmm...what did the turntable drink?

35.8V on collector.
21.6V on base
21V on emitter
are the correct values.
27V is IMO too high.

I never encountered this problem. What happened just before?

/Hugo
  Reply With Quote
Old 8th September 2006, 10:08 PM   #3
diyAudio Member
 
Join Date: Sep 2006
Hi,

I think I may have shorted something, was replacing the target light!

Just been doing some testing, i think q3 may have blown as i have 15v and 27 volts either side of r2. (also have 15 volts and 36volts either side of r1).

what do you think? do you think i may have damaged something else?

cheers
  Reply With Quote
Old 8th September 2006, 10:14 PM   #4
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
What transistor# is Q1? 2SD389 or 2SD1265?
Depending I can post the detail of the PSU with corresponding voltages.
Apart from that, you have a good chance Q2 and Q3 are broken.

/Hugo
  Reply With Quote
Old 8th September 2006, 10:20 PM   #5
diyAudio Member
 
Join Date: Sep 2006
Its 2SD1265
  Reply With Quote
Old 8th September 2006, 10:20 PM   #6
diyAudio Member
 
Join Date: Sep 2006
Also got 0v at the 5v test point d3, i'm pretty convinced its q2 or q3 now.
  Reply With Quote
Old 8th September 2006, 10:24 PM   #7
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
This might help in case you don't have the schematic.
Go for it, replace Q2, Q3.
Attached Images
File Type: gif 1210.gif (10.4 KB, 159 views)
  Reply With Quote
Old 8th September 2006, 10:34 PM   #8
diyAudio Member
 
Join Date: Sep 2006
Thanks for that, I'm gonna try and get hold of q2 and q3 tomorrow and replace them.

Thanks alot for your help, i'll post my results when they are changed!

djruntime
  Reply With Quote
Old 9th September 2006, 02:36 PM   #9
diyAudio Member
 
Join Date: Sep 2006
Ok its looking better now, i've replaced q3 and q2, but have found that d3 has blown (ma4051mta) any ideas of where i can get these from?? or a suitable replacement?

cheers

djruntime
  Reply With Quote
Old 9th September 2006, 08:25 PM   #10
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
It's a standard zener, 5.1V 0.5W.

/Hugo
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem in pitch TECHNICS SL 1210 Willian Pires Analogue Source 4 7th February 2008 04:51 PM
Technics 1210 Mk5 Problem qwaszx Analogue Source 3 31st October 2007 06:19 AM
Technics 1210 problem matt J Analogue Source 5 19th April 2007 10:25 PM
technics 1210 M5G: Has this been rebuilt? sikniks Analogue Source 3 1st August 2006 03:04 AM
technics 1210 problem tdiman Analogue Source 3 25th November 2005 04:50 PM


New To Site? Need Help?

All times are GMT. The time now is 05:12 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2