Power supply clicking won't start - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

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 23rd July 2005, 05:43 AM   #1
diyAudio Member
 
Join Date: Apr 2005
Location: Simcoe Ont
Default Power supply clicking won't start

I have an ADAT Power supply is not starting up just clicking. I can't find any specs or schematics. Brother has Camera. Would anybody care to help me through this problem? I have a meter, soldering and desoldering tools.
Thanks
  Reply With Quote
Old 23rd July 2005, 05:46 AM   #2
diyAudio Member
 
Join Date: Apr 2005
Location: Simcoe Ont
Default Power supply

BTW It is a Higain DKS-606U
  Reply With Quote
Old 24th July 2005, 07:37 PM   #3
mzzj is offline mzzj  Finland
diyAudio Member
 
Join Date: Jul 2005
Location: 65N 25E
Default Re: Power supply clicking won't start

Quote:
Originally posted by argonrepublic
I have an ADAT Power supply is not starting up just clicking. I can't find any specs or schematics. Brother has Camera. Would anybody care to help me through this problem? I have a meter, soldering and desoldering tools.
Thanks
I Suppose it is SMPS?
If so:
1. dried electrolytic caps, especially vcc filtering cap for controller ic)xx3842, xx3842,++. Located in primary side of pwr supply, good quality pic would help giving more specific advice.
2. output diodes shorted or output caps blown up and shorted.
3. output protection SCR/TAZ shorted
4. somebody trying to test power supply without proper minimum load.

99% of clicking power supplies are fixed after checking those.

And remember safety, you can die, set your house on fire or even worse break your equipment. Check big mains filtering caps on power supply with multimeter, they can have up to 400V after disconnect for a loong time. Discharge with power resistor, light bulb or something similar(not your $$$ Erem pliers or screwdriver)
  Reply With Quote
Old 25th January 2006, 02:26 AM   #4
diyAudio Member
 
Join Date: Apr 2005
Location: Simcoe Ont
Default ADAT Power supply

I should have passed this on a while ago
http://www.prodigitalinc.com/
Contact Paul for ADAT Parts. Power supply recondition kit $35 U.S.
  Reply With Quote
Old 31st January 2006, 08:46 PM   #5
Cortez is offline Cortez  Hungary
diyAudio Member
 
Cortez's Avatar
 
Join Date: Dec 2002
Location: Hungary
A soft start question for kVA trafos:
I saw a very simple solution to this problem.
I dont know what it exactly was, but it was only a small, flat component.
What could it be ? Maybe a PTC ? Is it enough to solve this problem ?
  Reply With Quote
Old 31st January 2006, 10:58 PM   #6
diyAudio Member
 
Join Date: Apr 2005
Location: Simcoe Ont
Default argonrepublic

I learned too late that the 47uf Nichicon cap is usually the cause. I have also been told that it must be replaced with the same Nichicon High Ripple Cap
  Reply With Quote
Old 16th February 2007, 12:20 PM   #7
diyAudio Member
 
Join Date: Aug 2006
I too am having problems with this Adat black face supply.
I brought the adat with the power supply not working.
The previous owner tried too repair it, but ended up using
wrong parts & values. What makes it harder is, I found a schematic, but it is not the same revision as mine.
Mine is a REV C.

I ended up changing all solid state devices, and a few electro's,
I fired the unit up using a 100watt lamp in series with the power cord.
All was looking good, the adat lit up. I checked my DC volts and set the master adjustment. I removed the series 100 watt lamp
and but directly on the mains.
All seamed ok, but I noticed the front level meters spiking,
which made me concerned about the power supply still not being OK.
I loaded a tape into the Adat, and within a few seconds it blew
the internal 2 amp fuse.
I started to fault find and found the mosfet shorted,
I replaced the mosfet, and retested the unit with the test lamps
in circuit. My unit has extra components not shown on the schematic. If any one has any info on these power supplys could they forward it on to me thanks.
I am trying to find out why the mosfet blew


Brendan
__________________
Brendan
  Reply With Quote
Old 18th January 2008, 02:59 PM   #8
diyAudio Member
 
Join Date: Jan 2008
hi all,

I have 2 blackface adat's with the same problem.

My power supplies are dks-606u rev c. I do not have schematics of the power supply and was wondering if some of you solved the issue before I start replcacing parts.
Optically I can't see any blown capaciters. But as the power supply sometimes starts I do suspect capacitors. But most off the time I just hear the mosfet clicking.

Should I replace c109 100uF /50V or the mosfet or....?

Thx for any help
  Reply With Quote
Old 19th January 2008, 04:38 AM   #9
diyAudio Member
 
Join Date: Aug 2006
Default ADAT Power supply issues

The first problem I had was finding the correct circuit, even alesis
were vague in this department.

The power supply in mine is a HIGain DKS-606u
I ended up changing the 6N60 mosfet (Large burnt hole in side)
also the UC3842 switchmode IC regulator (or something like that)
But the problem I had when I got it going was the .33ohm resistor
(part R115) it was flashing over to the mosfet, with a almight crack.
I found that the .33ohm was tracking over to the mosfet.
I cleaned up the carbon around the area, and made sure the side
of the resistor which was tracking to be far away to the mosfet as poss. (Ie solder the component so little to no lead exposed)
I also changed the opto. and a few diodes in the process of fault finding.

I have attached the circuit which I found on the net.
for a alesis service manual, contact alesis.
__________________
Brendan
  Reply With Quote
Old 21st January 2008, 04:33 AM   #10
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
jeroengreece wrote
Quote:
Optically I can't see any blown capaciters. But as the power supply sometimes starts.....
Resoldering might solve the problem. U won't lose anything.

Gajanan Phadte
  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
Adcom GFA 535 Clicking on Power Up and Down YammerBoy Solid State 1 14th June 2009 11:12 PM
start-up sequence of Aikido preamp / SS power amp cbutterworth Tubes / Valves 5 7th May 2007 01:29 PM
Ultra Hi-B 0.03mm lamination start to supply tube-lover Group Buys 5 25th February 2007 05:55 PM
PC +/-5volt +/- 12volt triggered start power supply? Daveis Everything Else 3 22nd October 2006 12:15 AM
start with a computer power converter razordave123 Pass Labs 6 20th June 2005 02:32 PM


New To Site? Need Help?

All times are GMT. The time now is 03:13 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