[TechAssist] Re: fixed JVC AV35750 DEAD- Power light momentary faint click no start
- From: "C&W Electronics" <c_w_electronics@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 29 Mar 2003 21:17:19 -0600
Peter,
I would suspect that that capacitor has an infinite esr, which actually
takes it out of the circuit. It would supply no filtering what so ever!
Paul W
C&W Electronics
Azle Texas
----- Original Message -----
From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, March 29, 2003 5:24 PM
Subject: [TechAssist] fixed JVC AV35750 DEAD- Power light momentary faint
click no start
>
> C926 replacment fixed the set. Somthings up with that cap.. it reads
1022uf
> on a BK 830 out of circuit, nor does it show resistive leakage (>2 Meg).
> This set it is a smallish 1000uf @ 16v on the 13V PS.
>
> Peter Oliver
> Tucson Radio TV
>
>
>
>
>
>
> From: "Larry E." <videotech@xxxxxxxxxxxx>
> Reply-To: techassist@xxxxxxxxxxxxx
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: JVC AV35750 DEAD- Power light momentary faint
> click no start
> Date: Mon, 24 Mar 2003 13:11:46 -0500
>
>
> Peter, this is a shot in the dark but may apply, I have a tech note for
> same symptom on a AV-27750S that was fixed by replacing IC101 the 9
> volt regulator KIA7809. Don`t know if it`s the same chassis but worth a
> look, good luck, Larry E
> Larry Eastman
> American TV & Electronics
> Crystal River, Fl.
> www.tvjunkyard.com
>
> Peter oliver wrote:
>
> > I can try that but I'm doubtful C926 in this set is not the same cap as
> the
> > ones that fail, it is in a diffrent location and is a difrent value,
> size,
> > and color - the one that I tested was reading the proper capacitace out
> of
> > circuit on a BK capacitace meter. Every JVC that I've seen with C926
bad
> > the cap has been brown and the top of the cap has been raised and
poped,
> > leaked etc and none of them ever tested good, Also All of the sets that
> I've
> > seen with C926 bad have been 1998 production this is 1996.
> >
> > Peter Oliver
> > Tucson Radio TV
> >
> >
> >
> >
> >
> >
> > From: <support@xxxxxxxxxxxxxxxxxx>
> > Reply-To: techassist@xxxxxxxxxxxxx
> > To: <techassist@xxxxxxxxxxxxx>
> > Subject: [TechAssist] Re: JVC AV35750 DEAD- Power light momentary faint
> > click no start
> > Date: Sun, 23 Mar 2003 09:44:26 -0500
> >
> >
> > Peter....replace...don't check....C926 1000µf
> >
> > Jeff Dougherty
> > Intrepid Video TV/VCR
> > 263 S Front St
> > Steelton PA 17113
> > fax...717-564-4952
> > www.intrepid-video.com www.tech-repair.net
> >
> > ----- Original Message -----
> > From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Saturday, March 22, 2003 6:20 PM
> > Subject: [TechAssist] Re: JVC AV35750 DEAD- Power light momentary faint
> > click no start
> >
> >
> >
> > I ran down a Schematic for this beast finally and it is still a pain.
It
> > appears that the micro is keeping the set shutdown. Pin 52 has 3.3V
that
> is
> > turning on Q927 that also feeds Q542 and turns on Q926 (base has 5V)
that
> is
> > keeping the volatge on PC901 at 0v pulling one pin of Q927 brings the
> > voltage up to 13V and the relay clicks on to other side of pc901 only
> goes
> > to 0.8V. B+ is then 147V (same at collector of HOT) but there is no HV,
> or
> > ossilaton of the Horizontal. I am tempted to order another regulator
But
> I
> > am getting volatge on the otherside of the SW mode transormer which
means
> it
> > is running. The voltages and waveforms aren't right but that may be a
> > symptom of it not running. I checked the caps in the regulator circuit
> and
> > they test ok. I am comming up at a loss for this one It isn't giving up
> any
> > usefull secrets and this circuit is too convoluted to bypass easily.
Does
> > anywhere do depot repairs on this chassis?
> >
> >
> > Peter Oliver
> > Tucson Radio TV
> >
> >
> >
> >
> >
> >
> > From: <support@xxxxxxxxxxxxxxxxxx>
> > Reply-To: techassist@xxxxxxxxxxxxx
> > To: <techassist@xxxxxxxxxxxxx>
> > Subject: [TechAssist] Re: JVC AV35750 DEAD- Power light momentary faint
> > click no start
> > Date: Sun, 16 Mar 2003 08:50:57 -0500
> >
> >
> > Peter,
> > >From Tech Repair CD:
> > JVC\AV35750\Dead Set After Lightning\\\\Replaced Ic901(Strs5708)*
> > Pc901(Tlp621gb)* Q926(Dtc124eka-X)* Q922\\Remove Ce42538 antenna
> > splitter and resolder Q2* Q3* R1* R2* & R3\\\\\\
> >
> > Jeff Dougherty
> > Intrepid Video TV/VCR
> > 263 S Front St
> > Steelton PA 17113
> > fax...717-564-4952
> > www.intrepid-video.com www.tech-repair.net
> >
> > ----- Original Message -----
> > From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Saturday, March 15, 2003 4:30 PM
> > Subject: [TechAssist] JVC AV35750 DEAD- Power light momentary faint
click
> no
> > start
> >
> >
> >
> > JVC
> > model AV35750
> > main chassis SGK-1023A
> > Year 1996
> > Sams 3908 (trying to locate)
> >
> > Set is Dead.. Customer said went to turn on in the moring and
it
> > would
> > not come on. At present if the power is depressed the LED comes on for
a
> > moment and a faint single click is heard but there is no Degauss
action,
> and
> > no attempt apparent to start. The relays have 11.8 V to them but are
not
> > swithced on. There is standby 5V to the front panel. PC901 only has
1.1V
> on
> > the secondary side, the other opto-Isolator has 5V. The main regulator
A
> > STRS5708 appears to be oscilating. IC101 in only has 0.5V. Checked for
> C926,
> > and tested C928, C911,C921, C534, Unsoddered Vertical IC No start,
> > Unsoddered HOT Collector no start, Rang FBT ok, Unsoddered Audio IC no
> > start. Q926 does not test well (open ?) on a ohm meter diode test in
> circuit
> > (It is a surface mount but I don't know number so I can't say if it has
> an
> > internal resistor) Unsoddered main tuner Clock and data no start. This
> set
> > does not have an SE series error amp that I can find.
> >
> >
> > Peter Oliver
> > Tucson Radio TV
> >
> >
> >
> >
> > _________________________________________________________________
> > MSN 8 with e-mail virus protection service: 2 months FREE*
> > http://join.msn.com/?page=features/virus
> >
> >
>
****************************************************************************
*
> > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > http://www.tech-assist.org/secure/tip/main.html
> >
>
****************************************************************************
*
> > For automatic password retrieval 24 hours a day, go to:
> > http://www.tech-assist.org and select "Lost your Login Info?".
> >
>
****************************************************************************
*
> >
> >
> >
>
****************************************************************************
*
> > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > http://www.tech-assist.org/secure/tip/main.html
> >
>
****************************************************************************
*
> > For automatic password retrieval 24 hours a day, go to:
> > http://www.tech-assist.org and select "Lost your Login Info?".
> >
>
****************************************************************************
*
> >
> >
> > _________________________________________________________________
> > MSN 8 with e-mail virus protection service: 2 months FREE*
> > http://join.msn.com/?page=features/virus
> >
> >
>
****************************************************************************
*
> > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > http://www.tech-assist.org/secure/tip/main.html
> >
>
****************************************************************************
*
> > For automatic password retrieval 24 hours a day, go to:
> > http://www.tech-assist.org and select "Lost your Login Info?".
> >
>
****************************************************************************
*
> > Access the archives here:
> > //www.freelists.org/archives/techassist/
> >
>
****************************************************************************
*
> >
> >
> >
>
****************************************************************************
*
> > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > http://www.tech-assist.org/secure/tip/main.html
> >
>
****************************************************************************
*
> > For automatic password retrieval 24 hours a day, go to:
> > http://www.tech-assist.org and select "Lost your Login Info?".
> >
>
****************************************************************************
*
> > Access the archives here:
> > //www.freelists.org/archives/techassist/
> >
>
****************************************************************************
*
> >
> >
> > _________________________________________________________________
> > The new MSN 8: advanced junk mail protection and 2 months FREE*
> > http://join.msn.com/?page=features/junkmail
> >
> >
>
****************************************************************************
*
> > Submit A Repair Tip Here, or Change/Remove your Email Address:
> > http://www.tech-assist.org/secure/tip/main.html
> >
>
****************************************************************************
*
> > For automatic password retrieval 24 hours a day, go to:
> > http://www.tech-assist.org and select "Lost your Login Info?".
> >
>
****************************************************************************
*
> > Access the archives here:
> > //www.freelists.org/archives/techassist/
> >
>
****************************************************************************
*
> >
> >
> >
>
>
> --
> Larry Eastman
> American TV & Electronics
> Crystal River, Fl. 34428
> http://www.tvjunkyard.com
>
>
****************************************************************************
*
> Submit A Repair Tip Here, or Change/Remove your Email Address:
> http://www.tech-assist.org/secure/tip/main.html
>
****************************************************************************
*
> For automatic password retrieval 24 hours a day, go to:
> http://www.tech-assist.org and select "Lost your Login Info?".
>
****************************************************************************
*
> Access the archives here:
> //www.freelists.org/archives/techassist/
>
****************************************************************************
*
>
>
> _________________________________________________________________
>
>
>
****************************************************************************
*
> Add a known good Tech line number or part supplier in The
> Tech Address Book.
> http://www.tech-assist.org/secure/tip/contact.html
>
****************************************************************************
*
> Submit A Repair Tip Here, or Change/Remove your Email Address:
> http://www.tech-assist.org/secure/tip/main.html
>
****************************************************************************
*
> For automatic password retrieval 24 hours a day, go to:
> http://www.tech-assist.org and select "Lost your Login Info?".
>
****************************************************************************
*
> Access the archives here:
> //www.freelists.org/archives/techassist/
>
****************************************************************************
*
>
*****************************************************************************
Add a known good Tech line number or part supplier in The
Tech Address Book.
http://www.tech-assist.org/secure/tip/contact.html
*****************************************************************************
Submit A Repair Tip Here, or Change/Remove your Email Address:
http://www.tech-assist.org/secure/tip/main.html
*****************************************************************************
For automatic password retrieval 24 hours a day, go to:
http://www.tech-assist.org and select "Lost your Login Info?".
*****************************************************************************
Access the archives here:
//www.freelists.org/archives/techassist/
*****************************************************************************
Other related posts:
