[TechAssist] Re: Repost: T/A Apex GT2011J, Chassis CH10C3(s)..Dead
- From: ben daniels <benstv74820@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 17 Aug 2003 16:48:55 -0700 (PDT)
Jeff: Had this I believe last week. Check you zener
diode on the 5 volt reg. off pin 12 of hvt. that was
my problem with no 5.0. There is 2 5v circuits. Hope I
have helped Thanks
Ben Daniels
Bens TV
Ada, Ok. 74820
--- Intrepid Video Support
<support@xxxxxxxxxxxxxxxxxx> wrote:
> I received the schematics from three different
> people..thank you..
> Unfortunately, even in PDF, these things are hard to
> follow.
> This set is dead...Only voltages I find are 152vdc
> on C of HOT. and 9.6 in primary of SMPS transformer.
> No
> voltages on secondary.
> Also, no 5vdc standby can be found.
> I can not find a HOT on this unit. I find two large
> transistors on heat sinks, neither of which measure
> shorted out of circuit.
> 2SD2102 is the one with the Coll going to IHVT, but
> I think this is a Darlington transistor.
> 2SD4423 is the other one on primary of SMPS
> transformer with 152 v on COLL.
> I checked all part on the primary and find nothing
> shorted. I tried to place a light bulb in place of
> fuse
> and Coll of the transformer on power supply and
> still dead.
> Can anyone who has worked on these give me a boost
> in the right direction?
> Thank you.
>
> Jeff Dougherty
> Intrepid Video TV/VCR
> 263 S Front St
> Steelton PA 17113
> fax...717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
>
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