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

PA Systems A forum for discussion of all parts of a sound reinforcement or DJ system: loudspeakers, mixers (desks) etc.

Bose 1800 series VI Pro amplifier not turning on & Peavey PVi 3000 no output
Bose 1800 series VI Pro amplifier not turning on & Peavey PVi 3000 no output
Bose 1800 series VI Pro amplifier not turning on & Peavey PVi 3000 no output 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 21st October 2019, 06:10 PM   #1
StewartH83 is offline StewartH83  England
diyAudio Member
 
Join Date: Jan 2019
Location: Stockport, Greater Manchester
Send a message via MSN to StewartH83
Default Bose 1800 series VI Pro amplifier not turning on & Peavey PVi 3000 no output

Hello all,

This Bose didn't turn on one day when I come to use it. It was working fine the time before so no sudden shut down. I've finally got it out of the cupboard to have a look at it.

It still don't power up so checked the plug fuse, that has continuaty and I have continuaty from internal fuse to switch and from the switch to the board it goes to so presume they are fine.

From what I can see there's no burnt components and no bulging caps.

I wanted to know if you guys know of any prone problems with these amps and before taking it apart further to check buried boards if I should check anything else out. I understand those 22,000uF caps won't mess about in killing me so Im carefully respecting that.

Any ideas will be greatly appreciated as usual.

Also got a Peavey PVi 3000 of my brothers that turns on but no output, it was repaired at one time beforehand and has a suspicious dent on top from the inside going out, like a caps blown upwards ha. Lent him my Crown amp for now.

Thanks
Attached Images
File Type: jpg IMG_20191021_174125.jpg (798.6 KB, 85 views)
File Type: jpg IMG_20191021_174058.jpg (926.7 KB, 86 views)
  Reply With Quote
Old 21st October 2019, 06:34 PM   #2
amplidude is offline amplidude  Denmark
diyAudio Member
 
Join Date: Feb 2016
Did you check if the dc voltage on the big capacitors..? Check soft start circuit for damaged relay, and burned power resistor.
  Reply With Quote
Old 21st October 2019, 06:40 PM   #3
amplidude is offline amplidude  Denmark
diyAudio Member
 
Join Date: Feb 2016
Forget soft start part, primary side of trafo is triac driven,
  Reply With Quote
Old 21st October 2019, 06:59 PM   #4
StewartH83 is offline StewartH83  England
diyAudio Member
 
Join Date: Jan 2019
Location: Stockport, Greater Manchester
Send a message via MSN to StewartH83
Thanks for your advice and info. I didn't check those caps for DC earlier. 0.0 DC on the two I could reach
  Reply With Quote
Old 21st October 2019, 09:05 PM   #5
amplidude is offline amplidude  Denmark
diyAudio Member
 
Join Date: Feb 2016
It's late and have to get up early, but I leave the service manual here.
Will take a look at it tomorrow.
Attached Files
File Type: pdf bose_1600vi_1800vi_sm.pdf (1.07 MB, 28 views)
  Reply With Quote
Old 21st October 2019, 10:19 PM   #6
StewartH83 is offline StewartH83  England
diyAudio Member
 
Join Date: Jan 2019
Location: Stockport, Greater Manchester
Send a message via MSN to StewartH83
Can't thank you enough sir.

Hope you get some good rest.

Just a quick update: I have signal passing through the silver box but not tested much more as I cleaned all connectors, cleaned the dust out and looked at the Peavey. That just needs the sockets and pots soaking with contact cleaner by the sound of it.
  Reply With Quote
Old 22nd October 2019, 10:09 AM   #7
StewartH83 is offline StewartH83  England
diyAudio Member
 
Join Date: Jan 2019
Location: Stockport, Greater Manchester
Send a message via MSN to StewartH83
I'm currently working on the Peavey (Really I should of done separate posts) and I get music through it but very distorted, only very low volume it's 90% OK, moving the pot up anyway sounds terrible. I've blasted the pots and sockets with Deoxit, slightly better sound. I took the pots out, outside contacts & solder joints are clean but when moving the pot it seems like the wiper is grinding very hard, could it be the problem? Im considering taking the pot apart before I order some better ALPS pots or something.

It also seems like the guy who serviced it previously did a great job of cleaning but I feel he may of used a poor contact cleaner as all the connectors, speaker binding posts and input Jack's I'm using are effecting the sound, the Jack's sockets can turn the sound off completely, this could be why my brother got no output at all, twisting the Jack's gets a signal.

I've blasted the sockets with Servisol Super 10 but still not sorted the jack problem, I'll take the board out and clean them better and check the solder joints.

I'll take some pictures too, not sure if this glue is the conductive type too.
  Reply With Quote
Old 22nd October 2019, 02:07 PM   #8
StewartH83 is offline StewartH83  England
diyAudio Member
 
Join Date: Jan 2019
Location: Stockport, Greater Manchester
Send a message via MSN to StewartH83
Further troubleshooting on the Peavey. I removed the input board with the Jack's & speaker connection and cleaned all the pots and switches with Servisol, reflowed all the Jack's and speaker connectors solder joints only because they were thin, one of XLR joints had a hole in yet I wasn't using them inputs earlier. Seem to go no better, worse if anything, really struggling on the bass mainly.

I noticed a quiet hum coming from the transformer even when the socket had power but no switch on, I'm thinking that is suspect and needs looking at, although I've tighten the bolt but it didn't move.

I did poke about abit while it was playing music through one channel and notice the component on the heatsink in the middle, never seen one before, when wriggling the wires it had quite a bit of change, never went better yet was going worse. The connections don't look the best.

Any ideas will be greatly appreciated
Attached Images
File Type: jpg IMG_20191022_103138.jpg (847.4 KB, 57 views)
File Type: jpg IMG_20191022_103124.jpg (555.6 KB, 54 views)
File Type: jpg IMG_20191022_124333.jpg (740.2 KB, 50 views)
File Type: jpg IMG_20191022_135153.jpg (335.6 KB, 20 views)
  Reply With Quote
Old 22nd October 2019, 02:42 PM   #9
turk 182 is offline turk 182  Canada
diyAudio Member
 
Join Date: Oct 2012
if you've never seen a thermal cutoff before i guess you don't know that it's there to remove the supply line to the output stage in case of a thermal fault condition, and if it does have bad connections then wiggling them will have an audible consequence your changing the supply voltage!


please tell me your doing this "testing" under current limited conditions a la Dim bulb tester!?
  Reply With Quote
Old 22nd October 2019, 02:56 PM   #10
amplidude is offline amplidude  Denmark
diyAudio Member
 
Join Date: Feb 2016
Could be thermal cutoff, but I've done some reading and found out that bose/Carver amp are weak at triac and opto coupler, but yes do use a series connected bulb when testing, on both, that's all for now, having a busy day doing boring stuff.
  Reply With Quote

Reply


Bose 1800 series VI Pro amplifier not turning on & Peavey PVi 3000 no outputHide 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
Bose acoustimass 25 series ii internal amplifier Jimbobtx3 Solid State 4 4th March 2019 03:21 AM
Bias Adjustment on Bose 1800 Amplifier jamesdean Solid State 0 18th December 2011 03:45 PM
BOSE 1800 Two series power amp stera66 Solid State 0 15th February 2010 05:19 PM
i have a bose 1800 series 2 workstation amplifier worth???? homertooties Solid State 4 21st September 2008 04:40 PM


New To Site? Need Help?

All times are GMT. The time now is 08:23 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki