Aleph 3 standby mode, possible turn off - Page 3 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 11th September 2012, 09:50 PM   #21
mercc is offline mercc  Slovakia
diyAudio Member
 
Join Date: May 2009
Quote:
Originally Posted by RS232 View Post
You measure DC on the same points where you measured the AC...
The thing is like this
220/240V inlet goes to transformer to the rectifiers (before the rectifiers you have AC)
From the rectifiers to the capacitors to the boards you have DC...
The only thing you have to do is switch the voltmeter/multimeter from AC to DC and check on the capacitor (positive(red lead) to ground (black lead) and from ground (red lead) to negative (black lead)).
The leads are from the voltmeter and not the wires on the amp.
I'm no expert on the Aleph 3 but you should have around 26VDC on each side of the capacitor bank.

Ric

Yes, Aleph 3 should have 25 VDC. One channel board close to inputs/outputs has connections "out", "v-", "v+", "src", the other board has connections "v+", "out", "src".
  Reply With Quote
Old 12th September 2012, 09:19 AM   #22
mercc is offline mercc  Slovakia
diyAudio Member
 
Join Date: May 2009
Quote:
Originally Posted by Zen Mod View Post
put 2K2/3W resistors across each cap bank (both positive and negative)
You mean put resistors accross each individual capacitor or some similar arrangement as in the schematics, but there seems to be more capacitors forming CRC filter.
  Reply With Quote
Old 12th September 2012, 10:12 AM   #23
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
last ones , connected to amp boards

anyway - it seems that you have bigger problems with amp , so you need to sort that first
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 12th September 2012, 11:34 AM   #24
mercc is offline mercc  Slovakia
diyAudio Member
 
Join Date: May 2009
Yes, somewhere is problem propably, dont know where. Now the amp assembled without 22000uf power supply capacitors. Measured with voltmeter some contacts and earthing points on the outside of the amp, i think helped for a while but its a bit worse, i think it tries to find some sort of power or what.
  Reply With Quote
Old 12th September 2012, 02:45 PM   #25
RS232 is offline RS232  United Kingdom
diyAudio Member
 
Join Date: Jan 2006
Location: Swindon
I see you don't have much electronics experience, probably is best to look for someone that can help you maybe an electronic shop in your area.
Or like our friend Zen Mod says...
Send it to me for proper disposal...
  Reply With Quote
Old 12th September 2012, 03:22 PM   #26
mercc is offline mercc  Slovakia
diyAudio Member
 
Join Date: May 2009
I have put it on sale on local forum, maybe it requires more suitable conditions, i dont want do dismantle it, in fact im a bit afraid. DC plus and minus wires from rectifier were desoldered but i soldered it back. DC ground connection was not desoldered. Really i dont know what to do.
  Reply With Quote
Old 12th September 2012, 08:28 PM   #27
RS232 is offline RS232  United Kingdom
diyAudio Member
 
Join Date: Jan 2006
Location: Swindon
Did you got my PM ?
  Reply With Quote
Old 13th September 2012, 09:20 AM   #28
mercc is offline mercc  Slovakia
diyAudio Member
 
Join Date: May 2009
Yes, i received your PM yesterday about half an hour after PM from local interested buyer. Caps are changed to original ones, I will also include the Vishay caps and new IRF9610 also the original IRFD 9110. I will also include two printed reviews and power cord that was included with amp. Today morning I received another PM from local interested buyer, so propably Im going to sale it.
I think that after location change the transformer will propably regain its original 25 volts, as was renewed the original transistor, really dont know.
  Reply With Quote
Old 13th September 2012, 12:02 PM   #29
mercc is offline mercc  Slovakia
diyAudio Member
 
Join Date: May 2009
The transformer DC voltage is now 25 volts, one channel has DC voltage about 21 volts, the original IRF 9610 that seemed functional unsoldered now seemed to be conductive on two pins, the previous seems to be unconductive on outer pins, so i soldered the second unused IRF9610.
Now thinking about some kind of problem around IRF244 power supply transistors.
  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
Standby mode and speaker turn on delay together? TiGeRGuY Chip Amps 9 6th September 2012 07:55 AM
Standby mode for Aleph series... eclam Pass Labs 10 2nd April 2012 11:23 PM
Aleph-x standby mode yup Pass Labs 16 19th January 2007 01:59 AM
low power standby current mode for Aleph 5 Adrie Pass Labs 16 22nd January 2005 07:19 PM
Aleph-X standby mode (once again...) CheffDeGaar Pass Labs 3 3rd September 2003 07:03 PM


New To Site? Need Help?

All times are GMT. The time now is 03:41 AM.


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