[TechAssist] Re: Zenith Projo Model A50M91W\9-1978 smps module
- From: armando guerra <birdie@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 24 Jun 2005 11:32:40 -0700
Thanks Robert.
When I replaced the mentioned parts,I did resolder all cold solders in the bd
including the stand-up bd.The High voltage divider measures 48.2k at the grey
wires and I think the measurement allowed is between 47K and 52k.
Mando
Birdie's TV & Electronics
Casa Grande, AZ
tvservice wrote:
> look for poor solder on the standup board on the 9-1978
> and try new hv splitter
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
>
> ----- Original Message -----
> From: "armando guerra" <birdie@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, June 23, 2005 12:26 PM
> Subject: [TechAssist] Zenith Projo Model A50M91W\9-1978 smps module
>
> > This set came in dead.On the smps (9-1978)module,I replaced the flyback
> > (generic),the hot,CRX3412 (NTE580).Now set has a real nice pix for about
> > an hour and than after warm up,the pix starts to pulsate or like
> > blooming but just a few seconds and then goes back to normal.It does
> > this about every 2 to 3 min.If you change channel,its ok for a few sec
> > and then starts pulsing,shaking,blooming,hard to discribe.Like a
> > regulation problem.I really think I got a bad generic flyback because I
> > have had 3 bad ones before.
> > This one came from a good source but its still a generic.Before I order
> > another one,has anyone here come across this problem before?Maybe a bad
> > lytic!The flyback is a 95-4134-19 I would apreciate any tips or
> > idea's.Thanks.
> > Mando
> > Birdie's TV & Electronics
> > Casa Grande, AZ
> > PS What are the most common failure parts on this bd.Maybe I still have
> > another bad one besides the 3 that I replaced.
> >
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