Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

 
 
LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #1   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 5,247
Default Ashdown MAG 300 amp, 2004

Both 6.3amp fuses blown, 2 diodes of the bridge rectifier s/c. Internal
failure of this bridge, dodgey looking splodge logo, presumably Fronter
logo and 8amp rating, marked
AC BP8-04
or something else to change as well?
Main caps look ok and ESR (for what its worth in such cases) ok
The 2 failed diodes are
-ve to AC
+ve to other AC
Suspiciously 2 solder points look like crazed PbF solder but all is SnPb,
melted and reformed? the 2 points are at the -ve terminal and the AC
terminal of the other failed diode. Output devices DVM-D cold test as
expected. No heated traces or even obvious gaseous eruptions from the
bridge or anything out of the normal. No reported preceeding noises
prior to failure.
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ashdown Acoustic Radiator 2, amp N_Cook Electronics Repair 6 June 12th 13 08:12 AM
Ashdown Bass amp Phil Allison[_2_] Electronics Repair 9 June 11th 11 10:58 PM
Ashdown MAG 300 N Cook Electronics Repair 5 August 16th 08 01:53 PM
Ashdown ABM500 bass amp N Cook Electronics Repair 9 September 26th 07 10:25 AM
Ashdown Mag 200 bass amp n cook Electronics Repair 14 May 17th 07 03:21 PM


All times are GMT +1. The time now is 11:30 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"