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
b b is offline
external usenet poster
 
Posts: 764
Default DVD/ STEREO SYSTEM: bridge rectifier question

I've just 'fixed' a dvd/amp/stereo all in one made by the world famous
Sunstech :-p
( model hf-dv55m ; manual and details here
http://www.sunsiberica.com/productos...tar_producto=5)

Unit was dead, on power up some garbled text appeared in the display.
measuring o/p voltages on the psu pcb, I saw the display lines were ok
but the 5v line was dead. Probing further, I found an o/c cct
protector or fusible resistor (marked '3000') in the DC output of one
of the bridge rectifiers.

I eventually traced the cause to a partially shorted spindle motor.
Changed that and the beast works, but I am concerned that the bridge
rectifier (marked GW RS202; appearance-wise, its like number 2 in
this pic http://arcadecontrols.com/BBBB/bridges.jpg ) gets extremely
hot in operation (you can't keep a finger on it at all). Not sure if
that is normal; the pcb looks slightly scorched near there, so could
have always been this way for all I know. The other identical bridge
is pretty much cool in use.

So, question is, is this likely to be leaky? I've only ever had one
case of a similar leaky rectifier, in a VCR a few years ago. In my
experience they normally just short out. Maybe fit a beefier one?

Any thoughts welcome.
-B
 
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
Bridge rectifier formula The Phantom Electronic Schematics 1 July 23rd 08 03:10 PM
Bridge rectifier replacement [email protected] Electronics Repair 20 April 14th 07 03:51 AM
Bridge rectifier. John Electronics Repair 8 November 1st 06 07:55 PM
homebuilt welding rectifier: single diode instead of bridge rectifier? [email protected] Metalworking 4 October 30th 05 12:27 AM
Bridge Rectifier Steve Lewinsky Electronics 4 November 24th 03 02:16 AM


All times are GMT +1. The time now is 06:35 PM.

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"