VCR Sony SLV-778HF PS problem
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From: amdx on 21 Jan 2010 20:49 Hi all, I have a dead SLV-778HF vcr. The switching transistor tests ok and all the diodes check good. I found Q102 checks open. It is the driver for the switching transistor. It is labeled C4040, it has a one last symbol looks like a 0 with a horizontal line through it. I have searched C4040 and 2sc4040 datasheet and didn't get one hit! I'm pretty sure it is a transistor, the pcb is labeled B C E. Any Ideas? Mike
From: Jamie on 21 Jan 2010 21:40 amdx wrote: > Hi all, > I have a dead SLV-778HF vcr. > The switching transistor tests ok and all the diodes check good. > I found Q102 checks open. It is the driver for the switching transistor. > It is labeled C4040, it has a one last symbol looks like a 0 with a > horizontal line through it. > I have searched C4040 and 2sc4040 datasheet and didn't get one hit! > I'm pretty sure it is a transistor, the pcb is labeled B C E. > Any Ideas? > Mike > > NPN medium power BJT, 32V (BR)CEO, 1 amp C (collector)
From: amdx on 21 Jan 2010 22:03 "Jamie" <jamie_ka1lpa_not_valid_after_ka1lpa_(a)charter.net> wrote in message news:8Y76n.4522$CM7.1551(a)newsfe04.iad... > amdx wrote: > >> Hi all, >> I have a dead SLV-778HF vcr. >> The switching transistor tests ok and all the diodes check good. >> I found Q102 checks open. It is the driver for the switching transistor. >> It is labeled C4040, it has a one last symbol looks like a 0 with a >> horizontal line through it. >> I have searched C4040 and 2sc4040 datasheet and didn't get one hit! >> I'm pretty sure it is a transistor, the pcb is labeled B C E. >> Any Ideas? >> Mike >> >> > NPN medium power BJT, 32V (BR)CEO, 1 amp C (collector) > Got a cross for it? And where'd you get the info? Thanks, Mike
From: Sofa Slug on 22 Jan 2010 01:16 amdx wrote: > Hi all, > I have a dead SLV-778HF vcr. > The switching transistor tests ok and all the diodes check good. > I found Q102 checks open. It is the driver for the switching transistor. > It is labeled C4040, it has a one last symbol looks like a 0 with a > horizontal line through it. > I have searched C4040 and 2sc4040 datasheet and didn't get one hit! > I'm pretty sure it is a transistor, the pcb is labeled B C E. > Any Ideas? > Mike > > The schematic for the SLV-777HF/778HF VCR can be downloaded here (sans parts list, unfortunately): http://www.eserviceinfo.com/downloadsm/7635/Sony_SLV-777HF.html
From: Mark Zacharias on 22 Jan 2010 05:19
"amdx" <amdx(a)knology.net> wrote in message news:9be8$4b590417$18ec6dd7$19162(a)KNOLOGY.NET... > Hi all, > I have a dead SLV-778HF vcr. > The switching transistor tests ok and all the diodes check good. > I found Q102 checks open. It is the driver for the switching transistor. > It is labeled C4040, it has a one last symbol looks like a 0 with a > horizontal line through it. > I have searched C4040 and 2sc4040 datasheet and didn't get one hit! > I'm pretty sure it is a transistor, the pcb is labeled B C E. > Any Ideas? > Mike > > Sony part number 8-729-012-31. B & D Enterprises says it subs to 2SC2673 for $0.39 MCM lists it for $1.93 Mark Z. |