To do the mentioned repair we would get $520-550 including service call, shop labor and parts. Robert tvservice@xxxxxxxxxxxxx H & H Electronics Inc ----- Original Message ----- From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Tuesday, May 10, 2005 9:18 AM Subject: [TechAssist] Re: Toshiba 50H72 TAC262 "dead" found F850 open... > I printed out your response. I guess I'm overly careful, but with these > HDTVs I usually don't just replace a blown fuse and see what happens. I > like to thoroughly research the sym-cures beforehand. I search the > database regarding anything referring to a blown F850 5A. > Paranoid I know... > I was thinking of testing the mentioned bridge,etc.if OK, figure a pair > of STK conv. ICs, resolder conv. board completely, solder the > interconnection > jumpers that couple between defl. and conv. boards. Do you think this > sounds logical? Now I need to arrive at a $$$ figure to quote... > Phil Bader > > Philip Bader > Jan Phyl TV Inc. (estab. 1976) > 3420 Recker Hwy. Winter Haven, Fl. 33880 > Fax (863) 299-8821 > email: tjanphyl@xxxxxxxxxxxxxxx > > > > tvservice wrote: > > >Phil > >Is this fuse blowing at power on and appears no short or load on the line? > >If so look at this: > >50H71 (any H line with STK's on signal board) > >Convergence problems with shutdown and blown fuses > >CAREFULLY INSPECT AND RESOLDER SMALL BLACK or BROWN JUMPERS ON TOP OF BOARD > >NEAR STK's > >May cause intermittent convergence problems or shutdown > >Also check low value resistors 1.8 ohm 1 watt for increase value > >If D851 bridge is bad replace only with Toshiba #23357215/D4SBS6 special > >fast switching > > > >Robert > >tvservice@xxxxxxxxxxxxx > >H & H Electronics Inc > > > >----- Original Message ----- > >From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx> > >To: <techassist@xxxxxxxxxxxxx> > >Sent: Monday, May 09, 2005 12:55 PM > >Subject: [TechAssist] Re: Toshiba 50H72 TAC262 "dead" found F850 open... > > > > > > > > > >>Someone pointed out this F850 fuses the +16 volt source that goes to the > >>12 volt regulator on the converg. board, and check it's output > >>resistance for shorts. > >>This must not be a common issue, as the only tech hits I got so far were > >>two answers, and both were on the other TV-repair yahoo group I'm also > >>with. Will try to keep advised. > >>Phil Bader > >> > >>Philip Bader > >>Jan Phyl TV Inc. (estab. 1976) > >>3420 Recker Hwy. Winter Haven, Fl. 33880 > >>Fax (863) 299-8821 > >>email: tjanphyl@xxxxxxxxxxxxxxx > >> > >> > >> > >>Phil Bader wrote: > >> > >> > >> > >>>I did a search in my email database for "Toshiba" + "F850". > >>>Most of the hits were not my exact model, but similar,in that they had > >>>F850 open. I take it F850 aparently is in one of the convergence power > >>>supplies.General consensus is this fuse opens from bad solder on jumpers > >>>on the convergence board (many) and/or bad converg. ICs (uses a pair of > >>>STK392-110). Some techs got away with fuse changing and board jumper > >>>resoldering, others, the STK's as well were needed. > >>>Anything specific to my model with an open 5 amp F850 (SOC 5A pico > >>> > >>> > >fuse)?? > > > > > >>>Thanks, > >>>Phil Bader > >>> > >>> > >>> > >>> > >>> > >>-------------------------------------------------------------------------- > >> > >> > >--- > > > > > >>This Email List is Public. Remove: http://www.tech-assist.org/remove.htm > >>Lost Password: http://www.tech-assist.org and select "Login Problems?". > >>Appliance Repair List: > >> > >> > >http://www.tech-assist.org/secure/tip/chatjoin.htm#app > > > > > >>Email Archives: //www.freelists.org/archives/techassist/ > >> > >> > > > >--------------------------------------------------------------------------- -- > >This Email List is Public. Remove: http://www.tech-assist.org/remove.htm > >Lost Password: http://www.tech-assist.org and select "Login Problems?". > >Appliance Repair List: http://www.tech-assist.org/secure/tip/chatjoin.htm#app > >Email Archives: //www.freelists.org/archives/techassist/ > > > > > > > > > -------------------------------------------------------------------------- --- > This Email List is Public. Remove: http://www.tech-assist.org/remove.htm > Lost Password: http://www.tech-assist.org and select "Login Problems?". > Appliance Repair List: http://www.tech-assist.org/secure/tip/chatjoin.htm#app > Email Archives: //www.freelists.org/archives/techassist/ ----------------------------------------------------------------------------- This Email List is Public. Remove: http://www.tech-assist.org/remove.htm Lost Password: http://www.tech-assist.org and select "Login Problems?". Appliance Repair List: http://www.tech-assist.org/secure/tip/chatjoin.htm#app Email Archives: //www.freelists.org/archives/techassist/