Badcaps.net Forum
Go Back   Badcaps Forums > Motherboards with Bad Capacitors > Other Devices with Bad Capacitors
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 03-22-2019, 01:22 PM   #1
Hemingray
KABOOM!
 
Hemingray's Avatar
 
Join Date: Jul 2010
City & State: Lehigh Acres, FL (Fmr, AR)
My Country: USA
Line Voltage: 120V/60Hz
Posts: 132
Default Bose AWR1-1W (1995) (No Photos)

Sorry for lack of photos, this was done around 10PM last night, but thought I'd share this with everyone as a bit of help on older tech.

Got a message from someone on our local "Pay It Forward" group regarding a Bose radio that was, in their words, "only producing static". I went & picked this up from them, and got it home, powered it up, and was greeted with the granddaddy of all loud humming noises. At this point I also observed the VFD display was flickering rapidly. This told me to check the filter caps in the power supply.

Opening this unit, I was able to locate the caps to the right of the power transformer. All 3 were Nichicons, dated 1995. The largest one, 10000uF/25V, checked good (Likely for the amplifier circuit).

The next one, a 1000uF/35V Nichicon VR, Tested out so-so (Mind you, using a DMM as I don't know where my checker is), so I swapped this one out.

The last one, a 470uF/35V Nichicon VX, was our culprit. It was leaky enough that my DMM was reading about 4Mohm resistance across it. Replacing this brought the radio back to life.


Just sharing this to show everyone that even the best of the best don't last forever. All replaced caps were dated 1995.
Hemingray is offline   Reply With Quote
Old 04-11-2019, 09:46 PM   #2
Hemingray
KABOOM!
 
Hemingray's Avatar
 
Join Date: Jul 2010
City & State: Lehigh Acres, FL (Fmr, AR)
My Country: USA
Line Voltage: 120V/60Hz
Posts: 132
Default Re: Bose AWR1-1W (1995) (No Photos)

Update on this: Finally got the tester I ordered awhile back (one of those TC-1 multitesters), and tossed the suspect 470uF cap on it. Measured 127uF with 50 ohms ESR.
Hemingray is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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



Badcaps.net Technical Forums 2003 - 2019
Powered by vBulletin ®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 05:05 AM.
Did you find this forum helpful?