FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups 
 ProfileProfile   PreferencesPreferences   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Forum index » Electronix » components
Need help finding a schematic for a Quasar TV/VCR combo
Post new topic   Reply to topic Page 3 of 30 [446 Posts] View previous topic :: View next topic
Goto page:  Previous  1, 2, 3, 4, 5, ..., 28, 29, 30 Next
Author Message
Jerry G.
electronics forum Guru


Joined: 02 May 2005
Posts: 423

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Need help finding a schematic for a Quasar TV/VCR combo Reply with quote

Try any of the parts distributors for Panasonic, or Matsuchita. These are
copyright material, and they will not give out photocopies without written
permission.

--

Jerry G.
======


"mikeydude" <mikeydude@hotmail.com> wrote in message
news:mfs0e.2899$yq2.604@newssvr12.news.prodigy.com...
Model # VV8220
Chassis # KM-201

TV stopped working (no picture, sound still worked)
I found a few burned resistors (value?), an open power resistor, and I can't
identify one other part.

I need help getting the values of the following part numbers on the PCB:
R802
R804
R1002
D851

More details:
1) The part labeled D851 has one side connected to the main power (120V),
and the other side to the degaussing coil. It is a rectangular plastic box
with two leads coming out the bottom.
When I measured it with an analog VOM, it gave the same reading with the
leads connected either way. It wasn't open or shorted.
What is this part?

2) Both 800 series resistors that are bad are connected after the bridge
rectifier and before the STR30130 voltage regulator.
Could it be just a voltage spike that caused it, or is there something else
I should look for?
(A partial schematic I drew is available via e-mail if you need a more
accurate description of the circuit. Also posted a message with schematic
attached in "alt.binaries.schematics.electronic")

Thanks in advance for any help you can give,
-Mike
Back to top
Jamie
electronics forum Guru


Joined: 24 Mar 2005
Posts: 597

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Relay has double contacts ?? why Reply with quote

Jim Thompson wrote:

Quote:
On Sat, 05 Mar 2005 18:33:32 GMT, "NSM" <nowrite@to.me> wrote:


"Andy" <andy4046@ntlworld.com> wrote in message
news:LuiWd.263$hx4.144@newsfe1-gui.ntli.net...

Sometimes there are two ,where one set takes the first high current ,then
the other set assure there is a true connection.

The picture doesn't imply this. I suspect they don't want to run current
through the second pair.

N



Perhaps the second pair of contacts make a momentary connection during
the initial closure, then spring back?

...Jim Thompson
that is exactly what i suggested also.

i have seen that config before used as a peek and hold relay.
Back to top
Clarence_A
electronics forum addict


Joined: 02 May 2005
Posts: 66

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Supplier of replacement motherboard caps in UK wanted... Reply with quote

"Guylaine J. Parisien" <parisien6006@rogers.com> wrote in message
news:qYWdnVfNtYD1YbTfRVn-uQ@rogers.com...

Top poster ---- PLONK!
Back to top
Jim Thompson
electronics forum Guru


Joined: 06 May 2005
Posts: 5440

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Relay has double contacts ?? why Reply with quote

On Sat, 05 Mar 2005 18:33:32 GMT, "NSM" <nowrite@to.me> wrote:

Quote:

"Andy" <andy4046@ntlworld.com> wrote in message
news:LuiWd.263$hx4.144@newsfe1-gui.ntli.net...
Sometimes there are two ,where one set takes the first high current ,then
the other set assure there is a true connection.

The picture doesn't imply this. I suspect they don't want to run current
through the second pair.

N


Perhaps the second pair of contacts make a momentary connection during
the initial closure, then spring back?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
Back to top
NSM
electronics forum Guru


Joined: 05 May 2005
Posts: 719

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Relay has double contacts ?? why Reply with quote

"Henry Kolesnik" <kolesnik@sbcglobal.net> wrote in message
news:merVd.60310$iC4.40686@newssvr30.news.prodigy.com...
Quote:
This message was previously posted on alt.auto.mercedes,
sci.electronics.components, sci.electronics.repair

The glow plug relay on my diesel Mercedes, an 83 300SD has two sets of
parallel contacts but only uses one because the other has a gap of about
0.035" when the first set closes. I thought this was due to improper
alignment and I bent the other arm so that both would make contact. The
other day I found another relay and noticed that it had one set of
contacts
spaced so they didn't close. Are there any experts out there that can
tell
why they do this? My guess is that the open set is a spare for when the
first set wears too much. But that doesn't make sense because two sets
working in parallel wouldn't wear as fast. Also would like to know if
anyone has reversed engineered the circuit as it has an IC and a couple
transistors. The circuit acts as monitor to make sure glow plug no. one
is
drawing current and then turns a dash light indicating that the plugs are
heating and when it goes out in a few seconds it OK to hit the starter.

FWIW, only one set looks like full current contacts. IMO, it may be a relay
used for other purposes and they don't want to run current through the light
duty points.

N
Back to top
Henry Kolesnik
electronics forum addict


Joined: 02 May 2005
Posts: 52

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Relay has double contacts ?? why Reply with quote

No other use than supplying power to the glow plugs, turning a dash lamp on
and off, that's it.

--

73
Hank WD5JFR
"NSM" <nowrite@to.me> wrote in message
news:5bsVd.35599$ab2.22727@edtnps89...
Quote:

"Henry Kolesnik" <kolesnik@sbcglobal.net> wrote in message
news:merVd.60310$iC4.40686@newssvr30.news.prodigy.com...
This message was previously posted on alt.auto.mercedes,
sci.electronics.components, sci.electronics.repair

The glow plug relay on my diesel Mercedes, an 83 300SD has two sets of
parallel contacts but only uses one because the other has a gap of about
0.035" when the first set closes. I thought this was due to improper
alignment and I bent the other arm so that both would make contact. The
other day I found another relay and noticed that it had one set of
contacts
spaced so they didn't close. Are there any experts out there that can
tell
why they do this? My guess is that the open set is a spare for when the
first set wears too much. But that doesn't make sense because two sets
working in parallel wouldn't wear as fast. Also would like to know if
anyone has reversed engineered the circuit as it has an IC and a couple
transistors. The circuit acts as monitor to make sure glow plug no. one
is
drawing current and then turns a dash light indicating that the plugs are
heating and when it goes out in a few seconds it OK to hit the starter.

FWIW, only one set looks like full current contacts. IMO, it may be a
relay
used for other purposes and they don't want to run current through the
light
duty points.

N

Back to top
Henry Kolesnik
electronics forum addict


Joined: 02 May 2005
Posts: 52

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Relay has double contacts ?? why Reply with quote

There's no other purpose, dash lamp and glow plugs.

--

73
Hank WD5JFR
"NSM" <nowrite@to.me> wrote in message
news:5bsVd.35599$ab2.22727@edtnps89...
Quote:

"Henry Kolesnik" <kolesnik@sbcglobal.net> wrote in message
news:merVd.60310$iC4.40686@newssvr30.news.prodigy.com...
This message was previously posted on alt.auto.mercedes,
sci.electronics.components, sci.electronics.repair

The glow plug relay on my diesel Mercedes, an 83 300SD has two sets of
parallel contacts but only uses one because the other has a gap of about
0.035" when the first set closes. I thought this was due to improper
alignment and I bent the other arm so that both would make contact. The
other day I found another relay and noticed that it had one set of
contacts
spaced so they didn't close. Are there any experts out there that can
tell
why they do this? My guess is that the open set is a spare for when the
first set wears too much. But that doesn't make sense because two sets
working in parallel wouldn't wear as fast. Also would like to know if
anyone has reversed engineered the circuit as it has an IC and a couple
transistors. The circuit acts as monitor to make sure glow plug no. one
is
drawing current and then turns a dash light indicating that the plugs are
heating and when it goes out in a few seconds it OK to hit the starter.

FWIW, only one set looks like full current contacts. IMO, it may be a
relay
used for other purposes and they don't want to run current through the
light
duty points.

N

Back to top
NSM
electronics forum Guru


Joined: 05 May 2005
Posts: 719

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Relay has double contacts ?? why Reply with quote

"Henry Kolesnik" <kolesnik@sbcglobal.net> wrote in message
news:VPsVd.60331$iC4.57961@newssvr30.news.prodigy.com...
Quote:
No other use than supplying power to the glow plugs, turning a dash lamp
on
and off, that's it.

This is my best guess.
N
Back to top
Johnboy
electronics forum beginner


Joined: 03 Feb 2005
Posts: 4

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Anyone bought from comp-recycle? (Was: Looking for US Source for Intel 80486 (Used/Pulls) Cheap Reply with quote

A few places on the web have these in the $5.00 range

<yourtown@newyork.com> wrote in message
news:7iic219ngdm8ais4mroq0od6hcnhicppv5@4ax.com...
Quote:
I have a stock of several 486 pulls . Please contact me at this email:

nospamhs1948@yahoo.com

Please remove the nospam prior to emailing me


On 10 Jan 2005 03:22:29 -0800, james.crompton@gmail.com wrote:


John Atwood wrote:
Allen Michielsen <amichiel@servtech.com> writes:
I am looking for a source in the US to Mail Order a few Intel 80486

(33 or 66 Mhz) CPU's. I found a place which had them for $12 ea,
but
I lost the address. Compared to that, Jameco is a bit pricey at
$40.
They could be new, used, or pulls, it doesn't matter.

T Hakemack <haksauto@fbtc.net> wrote:
www.comp-recycle.com has them 33=15.00 66=35.00

Any happy customers of comp-recycle out there? They have some
things I'd like to buy, but a web search turned up one unhappy
customer at: http://www.internet-club.com/usa/pezz/

I'll cc the company to give them a chance to respond.


John
Back to top
Andy
electronics forum beginner


Joined: 19 Jul 2005
Posts: 40

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Relay has double contacts ?? why Reply with quote

Sometimes there are two ,where one set takes the first high current ,then
the other set assure there is a true connection.
"NSM" <nowrite@to.me> wrote in message
news:5bsVd.35599$ab2.22727@edtnps89...
Quote:

"Henry Kolesnik" <kolesnik@sbcglobal.net> wrote in message
news:merVd.60310$iC4.40686@newssvr30.news.prodigy.com...
This message was previously posted on alt.auto.mercedes,
sci.electronics.components, sci.electronics.repair

The glow plug relay on my diesel Mercedes, an 83 300SD has two sets of
parallel contacts but only uses one because the other has a gap of about
0.035" when the first set closes. I thought this was due to improper
alignment and I bent the other arm so that both would make contact. The
other day I found another relay and noticed that it had one set of
contacts
spaced so they didn't close. Are there any experts out there that can
tell
why they do this? My guess is that the open set is a spare for when the
first set wears too much. But that doesn't make sense because two sets
working in parallel wouldn't wear as fast. Also would like to know if
anyone has reversed engineered the circuit as it has an IC and a couple
transistors. The circuit acts as monitor to make sure glow plug no. one
is
drawing current and then turns a dash light indicating that the plugs are
heating and when it goes out in a few seconds it OK to hit the starter.

FWIW, only one set looks like full current contacts. IMO, it may be a
relay
used for other purposes and they don't want to run current through the
light
duty points.

N

Back to top
NSM
electronics forum Guru


Joined: 05 May 2005
Posts: 719

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Relay has double contacts ?? why Reply with quote

"Andy" <andy4046@ntlworld.com> wrote in message
news:LuiWd.263$hx4.144@newsfe1-gui.ntli.net...
Quote:
Sometimes there are two ,where one set takes the first high current ,then
the other set assure there is a true connection.

The picture doesn't imply this. I suspect they don't want to run current
through the second pair.

N
Back to top
Guylaine J. Parisien
electronics forum beginner


Joined: 05 Mar 2005
Posts: 4

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Supplier of replacement motherboard caps in UK wanted... Reply with quote

I repair motherboards ...done thousands.. There is no commercial source,
it's that simple.
the only place to get these sizes and ratings are from other motherboards...
I have spent hours to confirm this..
When I scrap a board, I save the components, capacitors mosfet, chips, etc.
for future use.


"Roger Hamlett" <rogerspamignored@ttelmah.demon.co.uk> wrote in message
news:WzKkd.69$yP5.10@newsfe5-gui.ntli.net...
Quote:

"Phil Vossler" <p.j.vossler@exeter.ac.uk> wrote in message
news:cmvqe6$6j4$1@south.jnrs.ja.net...
Following on from the "stolen electrolyte" fiasco...

see "http://www.spectrum.ieee.org/WEBONLY/resource/feb03/ncap.html".

We have a pile of p.c. motherboards and power supplies that have
suffered from the swollen & leaky capacitor syndrome. We would like to
be able to source replacement parts. Many of the components are 10mm and
12.5mm diameter components of quite high values (e.g. 4700uF, 16V, 105
degree C, 12.5mm dia) and these are unavailable from our usual
suppliers, RS & Onecall (Farnell).

Can anyone suggest alternative suppliers for these items (preferably
based in the UK).
Personally, I'd look through the Digi-Key catalogue in the US. They send
'overnight' if the item is in stock. However the capacitor you describe is
a vey unusual part. The 'standard' size for _minature_ 4700uF capacitors,
is 16mm diameter. I think 12mm, might be available in the Panasonic 'FC'
range. There have been a couple of ranges of smaller parts that have
disappeared from the market in the last few months, so finding these may
be hard. Most 'low ESR' capacitor ranges needed for switch mode supplies,
are limited by the internal resistances of the plates themselves, and the
leads, and so generally 2 off of a smaller capacitor will be used in
parallel to reduce the ESR even more. As such ranges like the Sanyo OSCON
capacitors, which offer a lot of capacitance in a small case, don't do
sizes like this. Rapid electronics do the OSCON range, and may help for
all but the biggest value units.
It may well be that the failures have less to do with faulty electrolyte,
than with trying to push components too far...

Best Wishes

Back to top
FERNANDO11
electronics forum beginner


Joined: 24 Mar 2005
Posts: 2

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Electronics Reply with quote

cool i love
Back to top
Gerard Bok
electronics forum addict


Joined: 04 May 2005
Posts: 88

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: Re: Need datasheet / pinout of old Intel PROM C3601 & C3602 Reply with quote

On Sat, 5 Feb 2005 10:54:19 +0100, "David Winter"
<d_winter@hotmail.com> wrote:

Quote:
Thanks for your help!
I now have the 3601 pinout, however, no way to get the 3602 one.
The Texas collection doesn't include a 512*4 PROM (only a 512*Cool.
I could trick with the two "Enable" pins of the 3601, supposing one was
suppressed in the 3602 to serve as A8 address line, but I'm not sure whether
all other pins remained unchanged.

Anybody can scan his TI Data Catalog for the 3602 (pinout, voltages) ?

I did scan it from the Intel catalog but the second e-mail was
refused by your mailserver :-)

--
Kind regards,
Gerard Bok
Back to top
lavinci
electronics forum beginner


Joined: 24 Mar 2005
Posts: 10

PostPosted: Thu Mar 24, 2005 6:14 pm    Post subject: jensen transformer Reply with quote

che tipo di transformer cerchi ??
ciao
Luca
Back to top
Google

Back to top
Display posts from previous:   
Post new topic   Reply to topic Page 3 of 30 [446 Posts] Goto page:  Previous  1, 2, 3, 4, 5, ..., 28, 29, 30 Next
View previous topic :: View next topic
The time now is Wed Dec 13, 2017 1:28 am | All times are GMT
Forum index » Electronix » components
Jump to:  

Similar Topics
Topic Author Forum Replies Last Post
No new posts sony trinitron kv-2140rwp schematic RJPO Repair 0 Tue Jul 18, 2006 5:38 pm
No new posts Is there a Ethernet USB combo device? KJ design 1 Tue Jul 18, 2006 12:40 pm
No new posts Orion 13" TV/VCR combo (model no: TVCR1321) ponomo Repair 4 Thu Jul 13, 2006 3:28 am
No new posts BORG 4640 stitcher schematic Evan Samuel Repair 0 Thu Jul 13, 2006 2:46 am
No new posts Schematic/Layout programs Andrew design 48 Wed Jul 12, 2006 5:18 pm

Copyright © 2004-2005 DeniX Solutions SRL
Other DeniX Solutions sites: Unix/Linux blog |  Unix/Linux documentation |  Unix/Linux forums |  Medicine forum |  Science forum  |  Send and track newsletters


Powered by phpBB © 2001, 2005 phpBB Group