[TechAssist] Re: Sony RA-2A KP-46C65 instantly blows IC601 & R608
- From: Kevin's TV Repair <kevintv@xxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 15 Jul 2005 13:34:44 -0700
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
>
>>
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