Article View: comp.sys.mac
Article #4677Mac Power Supply Part Number Question
From: Craig Ruff
Date: Sat, 16 Sep 1989 19:00
Date: Sat, 16 Sep 1989 19:00
12 lines
1109 bytes
1109 bytes
The power supply on my Mac Plus is in a near-term failure mode. It seems to loose all power occasionally (like a power hit), causing the screen to shrink and blink off and the system to reset. Since it's out of warranty, I thought I'd see if I could find the guilty component my self. The part number I didn't find an equivalent for is Q11: "NEC C2335 L31B", which seems to be a high voltage power transistor or SCR on a heat sink. Does anyone know the equivalent for this? Does anyone know which parts fail commonly in this power supply (besides the flyback transformer)? -- Craig Ruff NCAR cruff@ncar.ucar.edu (303) 497-1211 P.O. Box 3000 Boulder, CO 80307
Technical Details
Message-ID:
<4355@ncar.ucar.edu>Path:
arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!gatech!ncar!cruffShow Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!gatech!ncar!cruff From: cruff@ncar.ucar.edu (Craig Ruff) Newsgroups: comp.sys.mac,sci.electronics Subject: Mac Power Supply Part Number Question Message-ID: <4355@ncar.ucar.edu> Date: 16 Sep 89 19:00:14 GMT Reply-To: cruff@ncar.UCAR.EDU (Craig Ruff) Distribution: na Organization: Scientific Computing Division/NCAR, Boulder CO Lines: 12