[TechAssist] Re: need help w/DVD Player SMPS
- From: "Stefaan Van Slycken" <vanslycken@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 19 Aug 2003 22:45:41 +0200
One remark: i drew up the TOP223 as a simple transistor, but of course I'm
not sure that's what it is. It's a 3-legged TO-220 housing which reads
H143
TOP223Y
162968
So it's not the 4-legged fairchild TOP223Y. Any ideas what it might be
exactly?
kind regards,
Stefaan Van Slycken
Van Slycken Elektro - Waasmunster, Belgium.
----- Original Message -----
From: "Stefaan Van Slycken" <vanslycken@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, August 19, 2003 10:13 PM
Subject: [TechAssist] need help w/DVD Player SMPS
Hi.
I drew up the SMPS schematic from a Terratec DVD player, but I've found
these "stand-alone" SMPS in more than one cheap DVD player (mostly these
have a "computer-like" DVD player unit, one with a standard SCSI cable and
the typical PC power supply cable).
You can find this schematic at
http://users.pandora.be/vanslycken/dvdvoeding.bmp - it's about 200k. I hope
it's a bit legible.
THE PROBLEM WITH THIS UNIT is that it tries to start over and over again, a
couple of caps on the secondary were blewn and there was a bad contact on a
diode on the primary side (indicated with a (*) on the schematic). I
suspect the problem is on the primary, I've tried taking out the +5V line
diode, and it still does the same. It's in some kind of "burst mode", tries
to start up with 1 second intervals.
The +310V on the primary side capacitor is good too, and I measured every
diode for shorts or opens, but they all seem OK. I'm out of ideas...
I haven't been working on this kind of stuff without a service manual very
long, so I'd appreciate any help.
kind regards,
Stefaan Van Slycken
Van Slycken Elektro - Waasmunster, Belgium.
****************************************************************************
*
Classifieds! Buy or Sell!
http://sell.tech-assist.org
The Tech Address Book:
http://www.tech-assist.org/secure/tip/contact.htm
Add a Repair Tip Here, or Change/Remove your Email Address:
http://www.tech-assist.org/secure/tip/main.htm
Lost Password:
http://www.tech-assist.org and select "Lost your Login Info?".
Email Archives:
//www.freelists.org/archives/techassist/
*****************************************************************************
Classifieds! Buy or Sell!
http://sell.tech-assist.org
The Tech Address Book:
http://www.tech-assist.org/secure/tip/contact.htm
Add a Repair Tip Here, or Change/Remove your Email Address:
http://www.tech-assist.org/secure/tip/main.htm
Lost Password:
http://www.tech-assist.org and select "Lost your Login Info?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
