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Article #556Re: Digitor 12 volt portable tv for car - mistery
From: alitonto
Date: Thu, 28 Apr 2005 15:30
Date: Thu, 28 Apr 2005 15:30
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2709 bytes
This tv has these ICs: LA7680 and LA7837 and I don't think they provide any drive to the HOT; AT James wrote: > "AliTonto" <alitonto@hotmail.com> wrote in message > news:6655e407.0504262000.349e9abe@posting.google.com... > > Thanks for the info as I couln't find who makes these tvs; > > I will follow up for a schematic with DSE but in the meantime I would > > like to know if the voltage at the collector of the HOT for these > > portable 12v tvs in general should be 110-130 as the bigger ones. (I > > have measured 10.84 volts which is coming straight from the FBT. > > Thanks A.T. > > > <SNIP> > > Some time back there were a number of different branded small 12v TVs using > the same chassis. I cant recall how big they were exactly but around 6-8". > The entire TV ran on 10V, when using the 12VDC supply it first passed > through a 10V linear regulator, when using on 240VAC just used a 12V > transformer then through the same reg. The most unreliable part of them was > the regulator and a switchmode equivlent of the genuine encapsulated part > used to be available from GB telespares. That said I do recall one time > having one of these chassis fail to fire up the horizontal and it did turn > out to be the jungle / sync IC. > > Regards > James
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X-Google-Thread: 1131b0,e8738bea12387c66 X-Google-Thread: 103407,e8738bea12387c66 X-Google-Attributes: gid1131b0,gid103407,public X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!postnews.google.com!z14g2000cwz.googlegroups.com!not-for-mail From: "alitonto" <alitonto@hotmail.com> Newsgroups: sci.electronics.repair,aus.electronics Subject: Re: Digitor 12 volt portable tv for car - mistery Date: 28 Apr 2005 08:30:34 -0700 Organization: http://groups.google.com Lines: 38 Message-ID: <1114702234.375168.19950@z14g2000cwz.googlegroups.com> References: <1114356228.117692.209650@o13g2000cwo.googlegroups.com> <1114360466.570629.84530@f14g2000cwb.googlegroups.com> <1114418523.644593.294420@f14g2000cwb.googlegroups.com> <9klr61hqkiraomt6d6ubdkvthsunasm2h8@4ax.com> <6655e407.0504262000.349e9abe@posting.google.com> <426f319a$1@dnews.tpgi.com.au> NNTP-Posting-Host: 61.68.140.50 Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" X-Trace: posting.google.com 1114702245 11480 127.0.0.1 (28 Apr 2005 15:30:45 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Thu, 28 Apr 2005 15:30:45 +0000 (UTC) In-Reply-To: <426f319a$1@dnews.tpgi.com.au> User-Agent: G2/0.2 Complaints-To: groups-abuse@google.com Injection-Info: z14g2000cwz.googlegroups.com; posting-host=61.68.140.50; posting-account=zOGS5Q0AAADA230ob_8Ph48dn42Krvch