[TechAssist] Re: RCA D52W20 chassis ITC222 shutdown fix

You bring up an interesting point.  I've noticed the difference of the
solder on the new sony direct views.  It allmost looks like the solder
contains aluminum. It also seems to flow at a lower temperature which if it
is the same on these rca's would make it easier to wave solder with a hot
air gun or other.  I have never used this technique yet and am interested in
the temperature needed to successfully reflow these boards with hot air?
This may have fixed a a sony I just ordered an "A" board for because of
intermittant either on/in or near the main micro.

TV Doctor
Avalon, Wi

----- Original Message -----
From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, July 02, 2004 6:49 AM
Subject: [TechAssist] Re: RCA D52W20 chassis ITC222 shutdown fix


> We were told, all the connectors on the small signal board.
> I take my hot air desoldering gun and just heat the solder on all the pins
around the outside of the
> board. The type of solder they use for these is a different alloy than the
lead solder most common.
> Heating with an  iron will not allow the solder to stay on the pad.
> Jeff
> --
> Intrepid Video TV/VCR Repair
> 263 S Front St, Steelton PA 17113
> 717-939-7708; (F) 717-564-4952
> www.intrepid-video.com  www.tech-repair.net
> ----- Original Message -----
> From: "al m" <ampm@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, July 01, 2004 9:57 PM
> Subject: [TechAssist] Re: RCA D52W20 chassis ITC222 shutdown fix
>
>
> I've seen this before. What connector pins are you talking about? And why
> not use an iron?
> Al Marquardt
> ampm@xxxxxxx
> Al Marquardt Electronic Repair
> 206 W Main
> Girardville Pa. 17935
> ----- Original Message -----
> From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, July 01, 2004 9:37 PM
> Subject: [TechAssist] Re: RCA D52W20 chassis ITC222 shutdown fix
>
>
> > Great,
> > Thanks Robert...we need tips on these...especially when the deflection
> board is not warranty
> > replaceable...
> > Also, for the three clicks, if the troubleshooting guide for this leads
> you to the SSB, a simple reflowing
> > of the solder on the connector pins may fix it.
> > Use hot air or a torch...do not use an iron.
> > Also, for width and pin problems, DL032, TL100 and DL100(I hope their
> right).
> >
> > Jeff
> > --
> > Intrepid Video TV/VCR Repair
> > 263 S Front St, Steelton PA 17113
> > 717-939-7708; (F) 717-564-4952
> > www.intrepid-video.com  www.tech-repair.net
> > ----- Original Message -----
> > From: "tvservice" <tvservice@xxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, July 01, 2004 6:36 PM
> > Subject: [TechAssist] RCA D52W20 chassis ITC222 shutdown fix
> >
> >
> > This is for info only, also posted to members area
> > The hv  would come up and then shutdown with 3 pulses.
> >
> > Monitoring  EHT line from flyback at pin 10 of connector BL111 from
> deflection board to small signal board
> > measured only +15 volts
> > before shutdown. This is normally around +26 volts. according to
Tech-Line
> > Found resistor RL044 on deflection board off pin 10 same connector had
> increased in value to 650K ohm
> > should be 221K ohm
> > this resistor is located under heatsink for vertical IC
> >
> > To temporarily defeat shutdown (FOR TEST ONLY) short transistor TV852
B-E
> on small signal board location
> > H-7
> >
> > Robert
> > tvservice@xxxxxxxxxxxxx
> > H & H Electronics Inc
> >
>
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