[TechAssist] Re: Sony RA-2A KP-46C65 instantly blows IC601 & R608
- From: "Larry E" <videotech@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 15 Jul 2005 16:58:44 -0400
Al, thanks I`ll check 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 4:42 PM
Subject: [TechAssist] Re: Sony RA-2A KP-46C65 instantly blows IC601 & R608
> My set had the cap shorted that isolates the rf input to the set,a disc
> inside the can with the rf plug.
>
> Al Leatherman
> 224 RT. 46
> Mine Hill, NJ 07803
> 973-361-5796
> WWW.ALS-TV.NET
>
> ----- Original Message -----
> From: "Larry E" <videotech@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, July 15, 2005 4:09 PM
> 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, CET® #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, CET® #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. 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 Public. 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 Public. 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 Public. 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 Public. 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 Public. 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 Public. 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 Public. 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/
Other related posts:
