[TechAssist] Re: 9" Memorex TVM0903 12 VOLT TV. No Start!
- From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 4 Jul 2003 14:18:45 -0400
Yes I agree with using a battery. I now am using a 12 volt power supply 6
amp . Now the TV has B+ but now Horiz drive. I am trying to trace the
circuit back to the source of the drive pulse. The print I am using is not
correct. I am going over more solder connections also.
thanks for the help,
Bruce.
----- Original Message -----
From: "al m" <ampm@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, July 04, 2003 1:11 PM
Subject: [TechAssist] Re: 9" Memorex TVM0903 12 VOLT TV. No Start!
> When I worked in a warranty shop I did the same thing. Then we got a
battery
> and hooked it up and the TV turned right on. Kept that battery on the
bench
> for those 12V TV's.
> al marquardt
> ampm@xxxxxxx
> Al Marquardt Electronic Repair
> 206 W Main
> Girardville Pa. 17935
> ----- Original Message -----
> From: "C&W Electronics" <c_w_electronics@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, July 04, 2003 12:38 PM
> Subject: [TechAssist] Re: 9" Memorex TVM0903 12 VOLT TV. No Start!
>
>
> > Bruce,
> > One other thing that I did not notice on the first read of your post,
was
> that the unit was 12 dc only. Make sure that your power supply is capable
of
> supplying enough current to keep the tv power supply working long enough
to
> make the start-up transition.
> > I worked my butt off one time on the same type of start-up problem.
Found
> that my (old)power supply was dropping voltage at high current draw(bad
> 20,000uf filter). I went out and plugged it into my van and it kicked
right
> off. I had it 'fixed' and didn't know it. I then repaired my power supply.
I
> don't know why things won't last more than 40 years! Tsk tsk.
> >
> > Paul W
> > C&W Electronics
> > Azle Texas
> > ----- Original Message -----
> > From: Bruce Tiedeman
> > To: techassist@xxxxxxxxxxxxx
> > Sent: Friday, July 04, 2003 9:59 AM
> > Subject: [TechAssist] Re: 9" Memorex TVM0903 12 VOLT TV. No Start!
> >
> >
> >
> > Thanks Paul,
> > I will go over the connections again . I suspect this kind of a
problem
> also
> > with no luck so far. It is like finding a needle in a hay stack.
> > Bruce.
> >
> > ----- Original Message -----
> > From: "C&W Electronics" <c_w_electronics@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, July 04, 2003 10:45 AM
> > Subject: [TechAssist] Re: 9" Memorex TVM0903 12 VOLT TV. No Start!
> >
> >
> > > Bruce,
> > > I haven't worked on this particular model, but I have repaired
'many'
> > combos for Long Haul Truckers. 99% of the time it will be 'defective
> solder
> > connections', which is caused by 'vibration'. Either use a strong
> magnifying
> > lens to check and resolder any dodgey connections.
> > > I have found that some parts will actually break loose from the ckt
> board.
> > >
> > > Paul W
> > > C&W Electronics
> > > Azle Texas
> > >
> > > ----- Original Message -----
> > > From: Bruce Tiedeman
> > > To: techassist@xxxxxxxxxxxxx
> > > Sent: Friday, July 04, 2003 8:33 AM
> > > Subject: [TechAssist] 9" Memorex TVM0903 12 VOLT TV. No Start!
> > >
> > >
> > > Memorex TVM0903 NO START!
> > >
> > > 5 volt regulator is OK. I changed the 9 volt regulator and checked
> most
> > > caps. This set is only 2 years old used in motor home (12 volt
only
> plug
> > > in). Can see the horiz pulse start to develop then shuts down.
> Thought I
> > > would try the list before giving up on this set. Not worth buying
a
> > print
> > > for this set.
> > >
> > > thanks for any help,
> > > Bruce
> > >
> > > B&T Electronics
> > > 139 Margaret St
> > > Sarnia Ontario
> > > Canada
> > > N7T 2Y3
> > > 519 344 1850
> > >
> > >
> > >
> >
>
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