[TechAssist] Re: Panasonic PC-33X78S(Yanedp212) No Start condition!
- From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 23 Aug 2004 11:11:29 -0400
More information, the transformer in question for standby voltage has 7
volts AC on the secondary side. I changed the diode and the cap is OK.This
transformer only develops 4 volts DC. I disconnected the relay thought it
could be loading down the supply. There is 110 volts on the primary! I am
seeing 4.2 ohms on the primary and 25.1 ohm on the secondary side.
I would think there should be around 16 volts on the secondary side with no
load. 'Could then get 12 volts and 5 volts. I am not familiar with this
chassis, don't do many Panasonic sets.
thanks
Bruce.
----- Original Message -----
From: "Ron Miller d.b.a. Country TV" <rlmbkm@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, August 22, 2004 11:10 AM
Subject: [TechAssist] Re: Panasonic PC-33X78S(Yanedp212) No Start condition!
> Don't have a print but does it have a small stand-by power transformer (
cap
> & diode) off the AC input to provide 5 and 12 volt stand-by voltages?
> Country TV
> Ron Miller
> Inez, TX. 77968
>
> ----- Original Message -----
> From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, August 22, 2004 9:48 AM
> Subject: [TechAssist] Panasonic PC-33X78S(Yanedp212) No Start condition!
>
>
> > I am hoping some has a print of the power supply on this set. There is
no
> > relay activity when power is applied. If I jumper the relay the set
starts
> > up with a blue screen. I have no 12 volts present on the primary side of
> the
> > relay.
> > This set uses a STRS6301 regulator. The power supply is on a separate
> board
> > from the main chassis. I have checked all the caps and diodes in the
power
> > supply. When the set starts up the waveform looks clean and is vary
> stable
> > at 135 volts so the regulator seems ok?
> > thanks for any help,
> > Bruce.
> >
> > B&T Electronics
> > 139 Margaret St
> > Sarnia Ontario
> > Canada
> > N7T 2Y3
> > 519 344 1850
> >
> >
> >
>
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