Question about Audio Players & Recorders

Open Question

My Arirang SPA 203-III mixer / amp is blowing fuses. It was working fine till I connected my Bose studios to it. But that may not be the problem because the studios work even now. I replaced the inline and both PCB (10A 250V) fuses but the PCB fuses popped as soon as I powered up. I isolated the PCB and tested the transformer which seems to be providing the required voltages. I know the next suspects would be the rectifier bridge and Capacitors (no visible damage seen). Is there anyway to check without de-soldering them ? There is also a 250V rated relay inside that I don't know anything about. Could this be suspect ? Would a short in the speaker wires and resulting damage to output transistors blow the 250V fuses ? Thanks for your help Luke

Posted by on

3 Suggested Answers

  • 2 Answers

SOURCE: the transistor of my pioneer sx-203

Tell me the board no or exactly where it is located or there will be a number like T XX for denoting the sequence no of that transistor

i have a good one working now with me
if you have users manual please send for me
Dennis

Posted on May 20, 2009

AJIN G
  • 6694 Answers

SOURCE: Akai AM-U1 blows fuses 1 & 2, 2.5A, transformer to

hi,
If you are from USA then You have to use F1 and F2 3.5A/125V fuse instead of 2.5A.
and F3 and F4 3A/250V. This will solve the problem of blowing fuse when cold start.

If you you can give your email address then i will sent you the Service manual.
OK

Posted on Sep 22, 2011

Grubhead
  • 4751 Answers

SOURCE: numark ttx1 blowing new fuses

You are correct. Most are caused by a semi-conductor device. So the rectifier is a possibility. But also check devices with heat sinks on such as voltage regulators. Transistors and diodes and the transformer are easily checked with an Ohm meter. If it's faulty it will be just like you have touched the test probes together!

Posted on Mar 07, 2014

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

No power in Mackie TH-15A


i) I assume the fuse you mentioned was in the mains plug - did you also check the fuse in the TH15A mains input socket? This is accessed by pulling out the tab in the bottom section of the socket (below the centre pin). This is a 3.15Amp antisurge fuse, 20mm type.

ii) If this fuse has blown, then replace it & all may be well ...... but if it blows again, then move to step iii).

iii) With mains disconnected, remove rear panel (outer screws) & check the power supply PCB for damaged components, especially R111 & R112 (100ohms). If the latter are burnt or open circuited, then the amplifier module may have blown.

regards, Dave

Aug 20, 2014 | Mackie TH-15A Active DJ Powered THUMP...

1 Answer

Need to replace pigtail fuse


This may not be a fuse. Bose uses devices like this as "speaker protection". If this device is wired to the woofer, that is exactly what it is. For more information, please visit my website at audioserviceclinic.com. Thank you.

Dec 01, 2013 | Bose Lifestyle Ps28 Iii Subwoofer Dual...

1 Answer

Connecting Yamaha Mixer with Bose L-1 Amplifier


See this article about connecting a Yamaha mixer to a Bose L1
Mixer Yamaha MG8 2FX
or
Call BoseĀ® Product & Technical Support at (877) 335-2673 (U.S. and Canada only)
Monday-Friday: 8:30 AM - 9:00 PM ET
Saturday 9:00 AM - 5:00 PM ET
Or write to them at the Bose Forum
Ask Bose for Help Forum

Apr 16, 2012 | Bose L1 Speaker

1 Answer

Bose 901 eq connect to mixer and amp


how to connect bose 901 speakers to mixer. help me

Mar 29, 2012 | Bose 901 VI Main / Stereo Speaker

1 Answer

To Mr. Hyde: you appear experienced with Bose 501 Series III speakers. I need to replace a burned out glass bulb fuse inside the right speaker, the fuse for the woofer I believe. I think that you said that...


Hello whit_hughes,

Just received your request for some information regarding Bose 501's......... Series III. Your looking for te manufacturers part # for the fuse which is in line with the woofer? The fuses used ON the Series III Crossovers (hard wired/soldered directly to crossover board/componants) have been Identified as BUSS #2494, 2amp, Quick-Blow Glass Tube Type Fuses. The fuse which is in-series with the woofer & the fuse which is in-series with the pair of tweeters are the same! In theory this means that the woofer is capable of twice the wattage of the tweeters due to the tweeters being wired in series with each other..... which in turn divides the power beween the two equaly. On the woofer circuit there is only the one speaker or voice coil obsorbing the power. The woofer circuit being wired in parallel with the tweeter circuit again splits the power between the two cuircuits..... so in an ideal situation the woofer sees 50% total input power while the tweeters each see 25% total input power;;;; totaling 100% total. The way Bose has fused them in the Series III's is such that each branch can obsorb a total of 2 amps before shutting down each indivigual branch. This can be adventageous..... should peak power be exceeded causing loss of full load abruptly, Amplifier Power Output Transistors usually blow..... however when only half of the full cuircuit shuts down due to peak power exeeding limits causing one fuse to open (blow) ... the actual impedance (resistance) of the speaker increases protecting the Amplifiers Output Transistors! Thats the reason for the 2 fuses. Each of them are identical. They are soldered into place.... via the wire which is attached to each end of the fuse. (Note; the fuse "kit" Bose is trying to sell you is an external in line fuse holder for each speaker {costing 1.29 each} & 2 fuses for each holder, One for now & One for Later aftr it blows {costing 1.00 each}..... costing Bose 6.58, neting Bose $13.42 Profit!!!! Keep in mind that this fuse WILL NOT FIX YOUR PROBLEM EITHER! DUE TO THE FUSE WHICH IS PRESENTLY BLOWN HAS NOT BEEN REPLACED!!!!! ) The one that has to be replaced is on the crossover... not between the Amplifier & the Speaker Enclosure. Tools required = 1 Long Big Straight Blade Screwdriver to pry off speaker grill, 1 Phyllips Screwdriver to remove screws seccuring woofer to encloser... be carefull not to damage/tear gasket, 1 pair side cutters to cut blown fuse out of crossover curcuit, 1 pair needle nose pliers to attach NEW fuse to crossover curcuit, 1 soldering Iron & a small piece of solder to re-solder fuses leads securly to crossover curcuit. ( replace gasket, woofer, screws, & speaker grill. ENJOY! Should additionaL informaton be required please let me know.... you'll have to leave me your e-mail address for pictures or drawings.... as I don't think they can be sent through this site. Hope this helps ya..... Its an EASY JOB...... you CAN DO IT! & will be glad you did when your done, they'll sound GREAT! ) GOOD LUCK!

Jun 22, 2011 | Audio Players & Recorders

1 Answer

Could you send me the best set up starting with 1 for setting up our new XR 8600 Powered mixer in our church. We have 3 bose loudspeakers on each speaker output. Should those Bose be set for 100 watts...


Sorry, but you have a problem. The amp is rated to 4 ohms per side. Your speakers would have to be 16 ohm type to allow 3 per side in parallel. The Bose ratings are usually consumer type ratings and they would have to be set to 200 watts each (twice the rating that the amp can produce per side) to be safe connected to that amp. Your speakers are likely 8 ohm so you could parallel ONLY two per side OR if they are 4 ohm, then you would have to series them. You could series two or three per side safely for the amp. You don't tell us what model Bose speakers you have. Anyway, one has to first meet the specs of the amp and the speakers to avoid damage. It is likely the amp is too BIG for the speakers. For the setup of the mixer portion of this problem I want you to view videos on YouTube. Search for "mixer setup". Don't worry that they are different mixers than yours... there is enough commonality and the functions are nearly the same for MOST analog mixers. Recommendation: forget about two of the speakers... keep them as spares and run low volume to avoid blowing the speakers. I can't imagine any competent audio equipment supplier configuring your system this way.

Apr 24, 2011 | Peavey Xr 8600 8 Channel Powered Mixer

1 Answer

I have Behringer pmp 2000 mixer but it burned my fuse. How can I buy it?


If the fuse blew do NOT replace it till the unit is serviced or you will burn up more components. These units will blow out from a minimum of three to 30 components when they blow.

There is weak insulation between layers of the power amp circuit board and the arcing destroys a minimum of three transistors and often many more components on the power supply board as well.

I have repaired several of these and it is a lot of work. The power amp module can be had for about $175 but it often takes out the power supply as well.

Jun 30, 2010 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

Bose lifestyle 25 not coming on


There is probably a fuse located somewhere on it and the surge would have blown it, I know that most larger speakers and amps have safety fuses so they do not blow apart, the same goes for most electronics nowadays..find the fuse fix the problem. thanks Steve

Jun 13, 2009 | Bose LifeStyle 5 Series-III CD Shelf...

1 Answer

Hi. I would like to connect a Bose controller between a pair of Bose 802 speakers and a Studiomaster Powerhouse 300 MIXER/AMP. The diagram on the top of the controller shows the amplifier connected just...


Tech data sheet with diagrams:
http://www.bose.com/pdf/professional/802III_techdata.pdf

In a nutshell, the controller would go between any preamp Stereo OUTput and a dedicated amplifier INPUT. You really don't have much choice in the matter. The 802's and their controller are part of an inseperable system.

The Bose 802/901 family uses full-range speakers instead of traditional woofer/tweeter combinations, so they compensate for the response limitations at the extreme frequencies by using severe electronic modification of the program material. Hence, they are a system, functionally inseparable, but the results are outstanding. Consequently, they need a dedicated amplifier so they alone get the processing provided by their electronic component.


I don't have any data on your mixer/amp but if you can't insert the conroller logically between the mixer and its amps then you'll have to get separate dedicated amplification for the 802's, with the controller between the mixer and that amp.

May 17, 2009 | Bose Audio Players & Recorders

Not finding what you are looking for?
Audio Players & Recorders Logo

Related Topics:

276 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

kakima

Level 3 Expert

101406 Answers

 Grubhead
Grubhead

Level 3 Expert

4751 Answers

The Knight
The Knight

Level 3 Expert

71608 Answers

Are you an Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...