Peggs, Is there anyway to find out if the VS-4544 is same VS-50502 except for screen size or at least the power supply board might be the same? Tom Berger Tri-County TV Robbinsville North Carolina 28771 Ph--828-479-6043 Fax-828-479-4868 (tricountytv@xxxxxxxxxxxxx) ----- Original Message ----- From: "peggs" <peggs@xxxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx>; <techassist@xxxxxxxxxxxxx> Sent: Tuesday, January 24, 2006 1:46 PM Subject: [TechAssist] Re: Need VS-4544 schematic > Mine DOES have the Focus lead,at an angle,out of the side of the Fly. > Got mine from Tritronics $50ish. > BTW,one side(pin 8 of the fly circuitry) of R5A28 had -114v on it,the > other > side was MUCH lower,thus it was overheating.These voltage readings were > only there for an instant(shutdown),so MY resistor was just overheated,not > open or increased in Value. I replaced it anyway.Check those Diodes out of > circuit. > The PS Secondary voltages were ALL a little low before shutdown. > > Peggs > > > At 07:35 AM 1/24/06, Tri-County Tv wrote: >>Peggs, >> I think my fly is bad also as my set acts exactly as yours did >> and >>I'll bet these 2 models are similar. My fly # IS 334P24681 or 334P246B1 >>can't tell if that 8 is a B or an 8. Did your fly have the focus lead >>sticking out from the side at an angle? I did check those small diodes and >>other resistors and all are ok. My burned R5A28 has red at one end and >>purple at the other end, so it is possible my resistor could be 2.4K as >>yours was. I have not started searching for this fly, where did you get >>yours? >>Tom Berger >>Tri-County TV >>Robbinsville >>North Carolina 28771 >>Ph--828-479-6043 >>Fax-828-479-4868 >>(tricountytv@xxxxxxxxxxxxx) >>----- Original Message ----- >>From: "peggs" <peggs@xxxxxxxxxxxxx> >>To: <techassist@xxxxxxxxxxxxx>; <techassist@xxxxxxxxxxxxx> >>Sent: Tuesday, January 24, 2006 11:55 AM >>Subject: [TechAssist] Re: Need VS-4544 schematic >> >> >> >I just repaired a VS50502 with an overheated R5a28(2.4K). >> > The Flyback was bad.... it rang good..... set was shutting down >> > immmediately.I could lift the 130v fuse,and the set would stay >> > on(careful,slow discharge this 130v when you shut the set off). >> > Found a few tips on this model for a couple of bad Diodes(1n4148) when >> > R5a28 is bad........ D5a21,22. >> > The Diodes were good in my set. >> > >> > I'm not sure how similar your set is to this one. >> > >> > Peggs >> > >> > >> > At 03:11 PM 1/23/06, Tri-County Tv wrote: >> >>Jeff, >> >> I have scoped the H.O.T collector and looks distorted , driver >> >>transistor output is clean , If I keep turning the set on , R5A28 >> >>starts >> >>to >> >>burn, with is off the ACL line from flyback pin# 8 . I am not sure of >> >>the >> >>value of this resistor. It now measures about 65K. If pin 8 is the low >> >>side >> >>of the internal HV diodes , then maybe I am dealing with a bad fly. I >> >>think >> >>the burning of R5A28 should be clear clue as to where the problem is. I >> >>am >> >>still working without a schematic. >> >>Tom Berger >> >>Tri-County TV >> >>Robbinsville >> >>North Carolina 28771 >> >>Ph--828-479-6043 >> >>Fax-828-479-4868 >> >>(tricountytv@xxxxxxxxxxxxx) >> >>----- Original Message ----- >> >>From: "Shoreline Electronics" <jstielau@xxxxxxxx> >> >>To: <techassist@xxxxxxxxxxxxx> >> >>Sent: Monday, January 23, 2006 12:27 PM >> >>Subject: [TechAssist] Re: Need VS-4544 schematic >> >> >> >> >> >> > Can you scope the collector at startup and see if the pulse is clean >> >> > or >> >> > distorted? >> >> > >> >> > Keep in mind , these sets have a discrete Horizontal Output section >> >> > and >> >> > a >> >> > HV >> >> > section. >> >> > >> >> > ========================== >> >> > Jeff Stielau >> >> > Shoreline Electronics Repair >> >> > 344 East Main Street >> >> > Clinton,CT 06413 >> >> > 860-399-1861 >> >> > 860-664-3535 (fax) >> >> > jstielau@xxxxxxxx >> >> > ======================== >> >> > >> >> > ----- Original Message ----- >> >> > From: "Tri-County Tv" <tricountytv@xxxxxxxxxxxxx> >> >> > To: <techassist@xxxxxxxxxxxxx> >> >> > Sent: Monday, January 23, 2006 12:18 PM >> >> > Subject: [TechAssist] Need VS-4544 schematic >> >> > >> >> > >> >> >> Hello everybody, >> >> >> I am in desperate need for a schematic and >> >> >> any >> >> >> repair tips for this old Mitsubishi Big screen. It shuts down at >> >> >> turn >> >> >> on, >> >> >> and draws heavy current from H.O.T I suspect the flyback but it >> >> >> rings >> >> >> good >> >> >> so maybe a shorted internal high voltage diode. I have a feeling >> >> >> this >> >> >> will >> >> >> be very hard to find. I am ready to put a match to this dog! I >> >> >> think >> >> >> the >> >> >> chassis is VZ3 Any help would be greatly appreciated. >> >> >> Thomas Berger >> >> >> Tri-County TV >> >> >> Robbinsville >> >> >> North Carolina 28771 >> >> >> Ph--828-479-6043 >> >> >> Fax-828-479-4868 >> >> >> (tricountytv@xxxxxxxxxxxxx) >> >> >> >> >> >> ----------------------------------------------------------------------------- >> >> >> This Email List is accessible to the general public through search >> >> >> engines. Remove: http://www.tech-assist.org/remove.htm >> >> >> Set Vacation >> >> >> mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation >> >> >> Lost Password: http://www.tech-assist.org and select "Login >> >> >> Problems?". >> >> >> Email Archives: //www.freelists.org/archives/techassist/ >> >> >> >> >> > >> >> > >> >> >> ----------------------------------------------------------------------------- >> >> > This Email List is accessible to the general public through search >> >> > engines. Remove: http://www.tech-assist.org/remove.htm >> >> > Set Vacation >> >> > mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation >> >> > Lost Password: http://www.tech-assist.org and select "Login >> >> > Problems?". >> >> > Email Archives: //www.freelists.org/archives/techassist/ >> >> >> >>------------------------------------------------------------------------ >> ----- >> >>This Email List is accessible to the general public through search >> >>engines. Remove: http://www.tech-assist.org/remove.htm >> >>Set Vacation >> >>mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation >> >>Lost Password: http://www.tech-assist.org and select "Login >> >>Problems?". >> >>Email Archives: //www.freelists.org/archives/techassist/ >> > >> > >> ----------------------------------------------------------------------------- >> > This Email List is accessible to the general public through search >> > engines. Remove: http://www.tech-assist.org/remove.htm >> > Set Vacation >> > mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation >> > Lost Password: http://www.tech-assist.org and select "Login >> > Problems?". >> > Email Archives: //www.freelists.org/archives/techassist/ >> >>----------------------------------------------------------------------------- >>This Email List is accessible to the general public through search >>engines. Remove: http://www.tech-assist.org/remove.htm >>Set Vacation >>mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation >>Lost Password: http://www.tech-assist.org and select "Login Problems?". >>Email Archives: //www.freelists.org/archives/techassist/ > > ----------------------------------------------------------------------------- > This Email List is accessible to the general public through search > engines. Remove: http://www.tech-assist.org/remove.htm > Set Vacation > mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation > Lost Password: http://www.tech-assist.org and select "Login Problems?". > Email Archives: //www.freelists.org/archives/techassist/ ----------------------------------------------------------------------------- This Email List is accessible to the general public through search engines. Remove: http://www.tech-assist.org/remove.htm Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/