Technics SUV4X runs cool! - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

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 18th May 2017, 07:36 PM   #1
ssi is offline ssi
diyAudio Member
 
Join Date: May 2017
Default Technics SUV4X runs cool!

Hi all

I purchased a Technics SUV4X and it tunrs out to be a German market model (220v) but seems to run ok in the UK 230/240v roughly. It has a slightly different circuit board (4 copper coils near speaker terminals) and no voltage selector. Unlike my UK market model it runs cool unless you turn up the volume a lot. Why would this be? Replaced SVI2004 perhaps? A small IC chip with a heat sink does get hot and so does the speaker relay which I replaced.

Please note I am very much an amatuer but am willing to have a go and learn.

Best Wishes

SSI

Last edited by ssi; 20th May 2017 at 05:45 AM.
  Reply With Quote
Old 21st May 2017, 03:30 AM   #2
diyAudio Member
 
Join Date: Nov 2004
Location: Germany
Measuring the rail voltages may be worth a shot here. I'd expect they'd be a fair bit lower in a unit destined for 4 ohm territory, even at slightly higher mains voltage, which may explain the difference.
  Reply With Quote
Old 21st May 2017, 05:30 AM   #3
ssi is offline ssi
diyAudio Member
 
Join Date: May 2017
Hi

Thanks for replying. How do I measure the rail voltage with a multimeter and what voltage am I looking for? The amp has a switch at the back to switch between higher and lower ohm speakers. I have it on 8 - 16 ohms as my B&602's are rated at 8 ohms.

In terms of sound quality the unit sounds great and has worked for hours without issue (only had it a couple of weeks), after replacing the relay.

Do you foresee any serious issues with continuing to run the amp?

Best Wishes
  Reply With Quote
Old 21st May 2017, 07:22 AM   #4
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Quote:
Please note I am very much an amatuer but am willing to have a go and learn.
With the very greatest of respect, it could be very easy for you to cause damage. One slip of a meter lead, a wrong range when measuring......

I would suggest you try and locate a full service manual for both variants and initially compare the circuit details. The manuals should show the supply voltages the amplifier runs on and it should also be possible to determine the current the output stage draws (I'm assume its manually adjustable although it may not be). That would be a good guide to the expected heat generation that will be produced.

Also, the relay 'getting hot' doesn't sound normal. If you replaced that part then be sure that the replacement is of similar voltage rating and also of similar coil resistance.
  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
Runs hot under no use kctess5 Audio Sector 2 1st February 2015 04:52 PM
Technics SL-5210 runs too fast. Search fro Service manual and help Calvin Analogue Source 12 14th January 2012 08:37 AM
Technics suv4x dovi Parts 4 10th August 2007 12:07 PM
OPA4228 runs hot iron25 Solid State 2 1st July 2007 05:42 PM
Technics new class-a amp (runs cold ?) Rixsta Solid State 2 17th March 2005 09:56 PM


New To Site? Need Help?

All times are GMT. The time now is 06:15 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki