Kevin, good point, Larry E Larry Eastman American TV & Electronics Crystal River, Fl. 34428 ----- Original Message ----- From: "Kevin's TV Repair" <kevintv@xxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Friday, July 15, 2005 5:19 PM Subject: [TechAssist] Re: Sony RA-2A KP-46C65 instantly blows IC601 & R608 > What if IC601 fails first? > > Kevin Wilks > Kevin's TV Repair > Penticton BC Canada > kevintv@xxxxxxx > > > -----Original Message----- > From: techassist-bounce@xxxxxxxxxxxxx > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Larry E > Sent: Friday, July 15, 2005 1:44 PM > To: techassist@xxxxxxxxxxxxx > Subject: [TechAssist] Re: Sony RA-2A KP-46C65 instantly blows IC601 & > R608 > > Kevin, It`s also supposed to open before it eats IC601 but it doesn`t, > Larry > E > Larry Eastman > American TV & Electronics > Crystal River, Fl. 34428 > ----- Original Message ----- > From: "Kevin's TV Repair" <kevintv@xxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Friday, July 15, 2005 4:34 PM > Subject: [TechAssist] Re: Sony RA-2A KP-46C65 instantly blows IC601 & > R608 > > > > That is what that resistor is there for. > > > > Kevin Wilks > > Kevin's TV Repair > > Penticton BC Canada > > kevintv@xxxxxxx > > > > > > -----Original Message----- > > From: techassist-bounce@xxxxxxxxxxxxx > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Larry E > > Sent: Friday, July 15, 2005 1:10 PM > > To: techassist@xxxxxxxxxxxxx > > Subject: [TechAssist] Re: Sony RA-2A KP-46C65 instantly blows IC601 & > > R608 > > > > Al, thanks for the reply, I checked the 2.2 meg resistor already and > > it`s > > good, main fuse strangely > > enough does not blow, I guess R608 opening saves it, Larry E > > > > Larry Eastman > > American TV & Electronics > > Crystal River, Fl. 34428 > > ----- Original Message ----- > > From: "Al L" <alleathe@xxxxxxxxxxxxx> > > To: <techassist@xxxxxxxxxxxxx> > > Sent: Friday, July 15, 2005 3:46 PM > > Subject: [TechAssist] Re: Sony RA-2A KP-46C65 instantly blows IC601 & > > R608 > > > > > > > I once had an antenna isolation shorted,ran perfectly on my > > variac,which > > was > > > also an isolation transformer.Hooked up the cable on ac,BAM blown > > fuse.There > > > was 120 VAC on the r-f connector!If I had been holding the cable,and > > touched > > > the rf.....................!Good luck. > > > > > > Al Leatherman > > > 224 RT. 46 > > > Mine Hill, NJ 07803 > > > 973-361-5796 > > > WWW.ALS-TV.NET > > > > > > ----- Original Message ----- > > > From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx> > > > To: <techassist@xxxxxxxxxxxxx> > > > Sent: Friday, July 15, 2005 3:24 PM > > > Subject: [TechAssist] Re: Sony RA-2A KP-46C65 instantly blows IC601 > & > > R608 > > > > > > > > > > You made me think that the customer mentioned "that they had > > lightning > > > > problems 2 days before set went down". Since it ran on the variac, > > it > > > > would > > > > be doubtful that the problem is in the power supply as they are > not > > very > > > > forgiving. I am wondering if they may also have an electrical > issue > > at > > > > their > > > > home as a result. Is the set at your shop now? > > > > > > > > Bob Waterman, CETR #RI-28 > > > > Master Technician License #9109 > > > > Service Manager / Parts Manager > > > > Gemini Computer, TV, & Security Alarms > > > > (508)695-7302 > > > > (508)695-7769 FAX > > > > geminitv@xxxxxxxxxxx > > > > > > > > > > > > ----- Original Message ----- > > > > From: "Larry E" <videotech@xxxxxxxxxxxx> > > > > To: <techassist@xxxxxxxxxxxxx> > > > > Sent: Friday, July 15, 2005 3:12 PM > > > > Subject: [TechAssist] Re: Sony RA-2A KP-46C65 instantly blows > IC601 > > & > > R608 > > > > > > > > > > > > Bob, don`t know, haven`t got the parts in yet, (ran out of IC601). > I > > did > > > > check the customers > > > > ac outlet when I found out the parts were shorted again, had 124 > > volts, > > I > > > > guess I`m stupid for > > > > not thinking to plug it straight into the AC at the shop before > > returning > > > > the set, never gave it > > > > a thought, (won`t happen again) the fact that it shorts all 6 pins > > to > > each > > > > other would say a dead > > > > short to me but I sure as hell can`t find one, Thanks for the > reply, > > Larry > > > > E > > > > Larry Eastman > > > > American TV & Electronics > > > > Crystal River, Fl. 34428 > > > > ----- Original Message ----- > > > > From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx> > > > > To: <techassist@xxxxxxxxxxxxx> > > > > Sent: Friday, July 15, 2005 2:59 PM > > > > Subject: [TechAssist] Re: Sony RA-2A KP-46C65 instantly blows > IC601 > > & > > R608 > > > > > > > > > > > >> Aside of plugging it into the variac at your shop, what happens > > when > > you > > > >> plug it directly into a normal outlet at your shop? Do it still > > short > > the > > > >> regulator or does this only happen at the customer's home? > > > >> > > > >> Bob Waterman, CETR #RI-28 > > > >> Master Technician License #9109 > > > >> Service Manager / Parts Manager > > > >> Gemini Computer, TV, & Security Alarms > > > >> (508)695-7302 > > > >> (508)695-7769 FAX > > > >> geminitv@xxxxxxxxxxx > > > >> > > > >> > > > >> ----- Original Message ----- > > > >> From: "Larry E" <videotech@xxxxxxxxxxxx> > > > >> To: <techassist@xxxxxxxxxxxxx> > > > >> Sent: Friday, July 15, 2005 2:50 PM > > > >> Subject: [TechAssist] Sony RA-2A KP-46C65 instantly blows IC601 & > > R608 > > > >> > > > >> > > > >> Hi Guys, My week for headache sets, this Sony RA-2A covers the > > following > > > >> models > > > >> KP41T65, 46C65, 48S65, 53S65, & 61S65, went to customers house > and > > all > > > > pins > > > >> of IC601 (MX0841AB-F) were shorted to each other, also R608 the > .1 > > 1/2w > > > >> fusible resistor was open, pulled all of the little blue caps > > around > > > >> IC601 > > > >> and checked > > > >> them on the sencore, all ok. I ordered a new IC & resistor, > > installed > > > >> them > > > >> and when > > > >> I powered up the set they instantly blew, pulled set to shop, > > > >> re-installed > > > >> new chip > > > >> & resistor, plugged into variac & brought up slowly, set started > > and > > > > worked > > > >> fine, heres > > > >> the fun part, I brought the set back to the customer hooked it up > > and > > all > > > > I > > > >> get is a > > > >> constant blink of the led, of course IC601 & R608 were blown > again, > > > >> Obviously my > > > >> Sencore variac being an isolation transformer let the set run but > > > >> connectiong to the > > > >> customers AC outlet lets the parts short, I have pulled every cap > > in > > the > > > >> "hot" side > > > >> of this power supply and found no shorted caps, checked the 2.2 > meg > > > > resistor > > > >> R601, there is no continuity between hot & cold ground, customer > > told > > me > > > >> second > > > >> time out that they had lightning problems 2 days before set went > > down > > but > > > > I > > > >> see > > > >> no arcs etc on board, main fuse was not blown, HOT circuit good, > > seems > > to > > > > me > > > >> it > > > >> has to be hot & cold ground connected somewhere??? > > > >> please help if you can, I`m pulling hair out at this point, Larry > E > > > >> Larry Eastman > > > >> American TV & Electronics > > > >> Crystal River, Fl. 34428 > > > > > >> > > > ------------------------------------------------------------------------ > > - > > - > > > -------------------------------------------------------------------------- --- > This Email List is Public. 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