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Author Topic: PS1B Part Cross Ref. Chris Trainor Expert Film Handler Posts: 161 From: Greenville, RI, USA Registered: Jun 99 posted 05-08-2004 04:05 PM                        Hi all, I was wondering if anyone knew of a replacement for the 5B4 rectifier used on the +/-14v side in the PS1B (cp200 power supply). This was made by Internation Rectifier but even their site, as well as DigiKey have no idea of it. Even just the ratings would be cool as I could figure out a replacement that way... the schematics from Dolby don't really tell you much. Thanks, --Chris  |  IP: Logged Josh Jones Redhat Posts: 1207 From: Plano, TX Registered: Apr 2000 posted 05-08-2004 04:29 PM                        This should not be that hard to figure out. Just measure your peak AC voltage coming out of the transformer, and get a rough idea of the current...then triple them both, and find a close replacement. I would guess without messing around with a beast like this that you'll want at least 60V PIV at maybe 10A. Or you could order the $30 replacement part from dolby.... Josh  |  IP: Logged Ken Layton Phenomenal Film Handler Posts: 1452 From: Olympia, Wash. USA Registered: Sep 1999 posted 05-09-2004 01:08 AM                     The NTE guide shows it crossing to an NTE 169 which is a 600 volt, 2 amp bridge rectifier.  |  IP: Logged Chris Trainor Expert Film Handler Posts: 161 From: Greenville, RI, USA Registered: Jun 99 posted 05-10-2004 10:19 PM                        Thanks much. I knew I could probably get away with any decent sized rectifier but wanted one specifically in that package format so I could mount it to the chassis. Thanks again, --Chris  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 05-11-2004 07:57 AM                     If you are referring to the one that looked like a little monument...then even Dolby stopped using it in the PS1Bs. The two bridge rectifiers ended up being the same thing. You just need to drill and countersink the hole to mount the new one...there is plenty of space to put in the square bridge. Steve  |  IP: Logged

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