Toshiba TV29C90 problem; Image fades to black...

Fred wrote:

Have had this camera a long time but all of a sudden, it started giving me
the "battery empty" message right after I install 4 new batteries.

IT'S NOT THE BATTERIES OR THE BATTERY CONNECTIONS.

Nothing special happened the day it started -- I had taken about
100 photos with no problem, then when the batteries ran out, I put in 4 new
ones and got 2 photos before "battery empty" message came up. Same ever
since.

Wonder if anyone had this problem come up on this or a similar model?

Thanks!!
Fred
Click to expand...

In my experience, they're very sensitive to battery voltage. Even one
soft cell among "new" batteries will trigger that message. I've even
seen it happen with lithium cells. Suggest you switch out cells, and
see if you can identify the bad one.
 
"Fred" <testing@testing1212mouse.com> wrote in message
news:LXKld.4359$GV5.3522@trnddc04...
IT'S NOT THE BATTERIES!!! IT'S NOT THE BATTERIES!!!
IT'S NOT THE BATTERIES!!! IT'S NOT THE BATTERIES!!!

Any other suggestions would be appreciated.
Click to expand...
How about a faulty camera then?
 
LOL! I know I'm probably asking the same thing over and over, but I have
gotten much good info by posting. Although I'd still like to find some kind
of service documentation, schematics, etc., that choice is probably not
going to happen. But that doesn't stop me from trying. If I can actually
troubleshoot to the component, there are boxes full of C700's and others in
that same series out there that could be fixed and save the user $150. I
plan to create a site and post the how-to-fix-it info I get -- if I ever get
anything usable.

Nothing irks me more than these big companies selling expensive items and
then not making service documentation available to the purchaser. Smacks of
monopoly to me.

And, no, I'm not running for office. B^)

Fred

"Harvey" <harvey@not.ntlworld.com> wrote in message
news:qhLld.106$2O5.83@newsfe5-win.ntli.net...
"Fred" <testing@testing1212mouse.com> wrote in message
news:LXKld.4359$GV5.3522@trnddc04...
IT'S NOT THE BATTERIES!!! IT'S NOT THE BATTERIES!!!
IT'S NOT THE BATTERIES!!! IT'S NOT THE BATTERIES!!!

Any other suggestions would be appreciated.


How about a faulty camera then?
Click to expand...
 
"Fred" <testing@testing1212mouse.com> wrote in message
news:w0Lld.4363$GV5.3244@trnddc04...
| One other thing...
| the batteries and battery contacts have ALREADY BEEN THOROUGHLY CHECKED
| OUT!! So we can pretty much discount the "PROBLEM WITH THE BATTERIES"
line
| of troubleshooting.

Unless you hook it up to a good power supply and test to see what voltage it
cuts out at, you haven't truly checked this out IMO.

N
 
"Fred" <testing@testing1212mouse.com> wrote in message
news:_pLld.3970$N_5.1750@trnddc03...
....
| Nothing irks me more than these big companies selling expensive items and
| then not making service documentation available to the purchaser. Smacks
of
| monopoly to me.
....

It's possibly a violation of law, depending on the country/state you are in.
Some have consumer protection laws or court decisions about such matters
requiring them to deliver the info to you.

I know that Radio Shack produced such manuals even for the most trivial
items and for those so unusual that few would tackle them.

N
 
NSM wrote:

"Fred" <testing@testing1212mouse.com> wrote in message
news:w0Lld.4363$GV5.3244@trnddc04...
| One other thing...
| the batteries and battery contacts have ALREADY BEEN THOROUGHLY CHECKED
| OUT!! So we can pretty much discount the "PROBLEM WITH THE BATTERIES"
line
| of troubleshooting.

Unless you hook it up to a good power supply and test to see what voltage it
cuts out at, you haven't truly checked this out IMO.

N




No kidding, but hey, he's made up his mind, LIT UP THE CAPS and moved on...
Click to expand...
 
"Fred" <testing@testing1212mouse.com> wrote in message
news:LXKld.4359$GV5.3522@trnddc04...
IT'S NOT THE BATTERIES!!! IT'S NOT THE BATTERIES!!!
IT'S NOT THE BATTERIES!!! IT'S NOT THE BATTERIES!!!

Any other suggestions would be appreciated.
Click to expand...
Well, if the camera works otherwise OK, then you have two choices. Either
live with the problem, or send it off to the Olympus repair facility, and
have them fix it. I would probably live with the problem unless and until
the camera failed in some other way, and then, when it was due for a Cal
and/or other service anyway, I would get the battery checking circuit
repaired along with.....I know that I never use the battery test circuit on
my camera, so I could care less if it works....I just carry spare batteries
around with me in case I should ever need them.
 
Check for open surface mount fuses on the inverter.
If ALL the inverters are not running, top and bottom lamp, ALL the
inverters go into shutdown. Same will happen if one of the lamps is simply
worn out/bad.

Replace with same size slow blow fuses and run test unit for days off and
on.

David
 
In article <ZZTld.40579$5K2.35694@attbi_s03>, weg9@comcast.net says...
"NSM" <nowrite@to.me> wrote in message news:5uNld.85524$E93.5211@clgrps12...

"Fred" <testing@testing1212mouse.com> wrote in message
news:_pLld.3970$N_5.1750@trnddc03...
...
| Nothing irks me more than these big companies selling expensive items
and
| then not making service documentation available to the purchaser.
Smacks
of
| monopoly to me.

I agree, and that's why I usually require the salesman to dig one up for
me.....The last new car I bought came with a complete factory service manual
because I did that, by the way.........


about a $500 extra if bought after the sale for my fairly ordinary wagon.
Click to expand...
 
Meirman,

Many battery manufacturers guarantee their product against leaks and will
replace damaged things. If you're not going to use something for a while do
not store it with the batteries.

Good luck,
Dave M.
 
Rajiv:
I just repaired an inverter for a 15" Viewsonic LCD. It was a dual
lamp one like yours. Two transistors that drive the transformer for
one of the lamps were bad. I used the diode position on my DMM to
check the SMD transistors. Replacing the transistors with regular
larger TO-92 case style ones fixed the problem.
I found that if you hold a small NE-2 bulb near the transformer, the
gas in the bulb will glow if there is high-voltage AC close to it.
If the bulb glows, the inverter for that section is working OK.

Most inverters will shut down if there are problems on the board.
The bulb would glow for just a second or two, then go out. It would
not glow near the transformer with the bad driver transistors.
The 4 wires going to the inverter on mine were
12 Volts, ground, enable, and dimming (some will change the voltage
on the lamps to control brightness).
It helps having a dual-bulb inverter in that you can check back and
forth between the parts on the two ends of the inverter board.
I have seen places on the Internet that sell the inverters for
between $70 and $130 (plus shipping).
Hope this helps...
John
 
You can find them much cheaper than the prices you quoted. Some places even
offer repaired units.

Use Google and enter the manufacturer and model number of the inverter to
find sources.

Bob

"John Gill" <jdgill@juno.com> wrote in message
news:71016e83.0411150736.5fb94f64@posting.google.com...
I have seen places on the Internet that sell the inverters for
between $70 and $130 (plus shipping).
Click to expand...
 
Good point. Will try to find an adapter.

"NSM" <nowrite@to.me> wrote in message
news:brNld.85523$E93.57387@clgrps12...
"Fred" <testing@testing1212mouse.com> wrote in message
news:w0Lld.4363$GV5.3244@trnddc04...
| One other thing...
| the batteries and battery contacts have ALREADY BEEN THOROUGHLY CHECKED
| OUT!! So we can pretty much discount the "PROBLEM WITH THE BATTERIES"
line
| of troubleshooting.

Unless you hook it up to a good power supply and test to see what voltage
it
cuts out at, you haven't truly checked this out IMO.

N
Click to expand...
 
"William Graham" <weg9@comcast.net> wrote in message
news:iUTld.40543$5K2.14161@attbi_s03...
"Fred" <testing@testing1212mouse.com> wrote in message
news:LXKld.4359$GV5.3522@trnddc04...
IT'S NOT THE BATTERIES!!! IT'S NOT THE BATTERIES!!!
IT'S NOT THE BATTERIES!!! IT'S NOT THE BATTERIES!!!

Any other suggestions would be appreciated.

Well, if the camera works otherwise OK, then you have two choices. Either
live with the problem, or send it off to the Olympus repair facility, and
have them fix it. I would probably live with the problem unless and until
the camera failed in some other way, and then, when it was due for a Cal
and/or other service anyway, I would get the battery checking circuit
repaired along with.....I know that I never use the battery test circuit
on
my camera, so I could care less if it works....I just carry spare
batteries
around with me in case I should ever need them.
Click to expand...
Yes, but in this case, I can't live with the problem - the camera is not
usable as is. And can't send to Olympus because I'm sure this problem will
come up again in a year or so - based on email and postings from others.
This is a common problem. Yet, I don't want to throw about the $$ I spent
on it, so I'll keep trying to find out a method of troubleshooting it
myself.
 
"Bruce Graham" <jbgraham@nowhere.com.au> wrote in message
news:MPG.1c0319f894f8b64f9897a2@news.optusnet.com.au...
In article <ZZTld.40579$5K2.35694@attbi_s03>, weg9@comcast.net says...

"NSM" <nowrite@to.me> wrote in message
news:5uNld.85524$E93.5211@clgrps12...

"Fred" <testing@testing1212mouse.com> wrote in message
news:_pLld.3970$N_5.1750@trnddc03...
...
| Nothing irks me more than these big companies selling expensive items
and
| then not making service documentation available to the purchaser.
Smacks
of
| monopoly to me.

I agree, and that's why I usually require the salesman to dig one up for
me.....The last new car I bought came with a complete factory service
manual
because I did that, by the way.........


about a $500 extra if bought after the sale for my fairly ordinary wagon.

Yes.....It's also wise to buy extra plastic trim and head/taillight covers
Click to expand...
when buying a new vehicle. I knew a guy that, when he found out how much he
was going to have to pay for that smashed taillight cover, he went back to
the parking lot, picked up the pieces, and glued them all back
together........
 
"Fred" <testing@testing1212mouse.com> wrote in message
news:gkbmd.2653$qS4.367@trnddc09...
"William Graham" <weg9@comcast.net> wrote in message
news:iUTld.40543$5K2.14161@attbi_s03...

"Fred" <testing@testing1212mouse.com> wrote in message
news:LXKld.4359$GV5.3522@trnddc04...
IT'S NOT THE BATTERIES!!! IT'S NOT THE BATTERIES!!!
IT'S NOT THE BATTERIES!!! IT'S NOT THE BATTERIES!!!

Any other suggestions would be appreciated.

Well, if the camera works otherwise OK, then you have two choices. Either
live with the problem, or send it off to the Olympus repair facility, and
have them fix it. I would probably live with the problem unless and until
the camera failed in some other way, and then, when it was due for a Cal
and/or other service anyway, I would get the battery checking circuit
repaired along with.....I know that I never use the battery test circuit
on
my camera, so I could care less if it works....I just carry spare
batteries
around with me in case I should ever need them.

Yes, but in this case, I can't live with the problem - the camera is not
usable as is. And can't send to Olympus because I'm sure this problem
will
come up again in a year or so - based on email and postings from others.
This is a common problem. Yet, I don't want to throw about the $$ I spent
on it, so I'll keep trying to find out a method of troubleshooting it
myself.


You might try an independent technician. Some of these guys are pretty good,
Click to expand...
and you might find one who is familiar with your particular make and
model.......
 
Jean-Marie Vaneskahian <jean@vaneskahian.com> wrote:
I now have my 4 - 12V 17Ah lead acid batteries connected in series
external to the UPS where I can see them and maybe even connect some
sensors to them (Temperatrue, pressure switch, etc...) to avoid this
in the future (Though I am not sure how)
I hope the APC SU2200NET SmartUPS does not kill my next set of 4 - 12V
17Ah lead acid batteries!!!!
Click to expand...
I have had the same problem. My theory is that it is charging slightly
over the permitted 2.3V per cell. Maybe 2.35V or so. Could this cause
the trouble?

---
Met vriendelijke groet,

Maarten Bakker.
 
On Tue, 16 Nov 2004 12:35:11 UTC, maarten@panic.xx.tudelft.nl wrote:

I have had the same problem. My theory is that it is charging slightly
over the permitted 2.3V per cell. Maybe 2.35V or so. Could this cause
the trouble?
Click to expand...
I've repair many of these over the years, and in all cases, the
problem is found to be a sorted cell or two amongst the 24
available (4 x 6 cell batteries). Once a couple short, the charging
voltage per cell increases and overheats the entire pack.

A heat sensor would be the best bet, but it's not going to
prevent the problem, only let you know that you HAVE a
problem :)

Tedd, VE3TJD
 
These manufactures do not give these schematics away for free, or allow
their service dealers to photocopy them. These are copyright material.

If you contact the manufacture directly, they may sell you a copy of the
service manual. This particular manufacture may have a policy where they
will only service the unit for you, but will not sell any service parts or
service information.

--

Jerry G.
======


"Cees Keyer" <pe1jmj-no-spam-@amsat.org> wrote in message
news:419a16f8$0$78279$e4fe514c@news.xs4all.nl...
L.S.

I am looking for the schematic of a Mission amplifier, type cambridge.

Could anyone help me out or give me a pointer to an web address where i
can download it?

TnX in advance,
Cees
--
# A brain storm to one person could be a slight draft to the other one.
# Cees Keyer, Amsterdam school of technology
# dept. Electronic Engineering, Weesperzijde 190, 1097DZ Amsterdam, NL
# pe1jmj-at-amsat.org Voice: (+31)20-5951639, Fax: (+31)20-5951620
Click to expand...
 
John,
Thanks for your response.
I checked the transistors using my DMM but they seem all right to me.
One thing is interesting, though. My inverter has two transistors for
each lamp pair. It appears that the transistors are connected in
parallel (their EBC legs are shorted with the paired transistor) But I
guess they have it that way because they just want more current
handling capability.

I have a few questions for you:-

1. About your Viewsonic monitor,
a. Do you have a pair of lamps at the top and bottom (a total of 4
lamps)?
b. Do the lamps at the top and bottom light up simultaneously?

2. If the lamps connected to one side of the inverter do not light up
(or are faulty) does the other side's lamps also turn off ?

3. Did you actually measure a +12 on one of the 4 wires going to the
inverter? Is that DC or AC ? Is that voltage stable at 12 v or does it
varies with the brightness? (although I understand that there is a
separate dimming control voltage)

4. When the inverter shuts down (due to a fault or something) does the
12V stop coming in? In other words the fault detection circuit…..it is
off the inverter board (maybe on the motherboard)?

The thing is… none of the 4 wires going to my inverter has 12 volts on
it. I have GND on two of them and one has +5v (which is display on
signal) and the 4th is kinda floating !

I used my DMM to measure DC on the 4th wire, unless it has 12 v AC my
measurements are valid.

Still I do not understand how come one of the CCFL flashes on when
switching on when the inverter is not getting 12 volts. My inverter
sure does need 12 volts, as evident from this page
http://www.chisam.com.tw/p3.htm
The one at the top (model # CDA-004A) is mine.

Unless it gets 12 volts for half a second !

Any input is highly appreciated!
-Rajiv



jdgill@juno.com (John Gill) wrote in message news:<71016e83.0411150736.5fb94f64@posting.google.com>...
Rajiv:
I just repaired an inverter for a 15" Viewsonic LCD. It was a dual
lamp one like yours. Two transistors that drive the transformer for
one of the lamps were bad. I used the diode position on my DMM to
check the SMD transistors. Replacing the transistors with regular
larger TO-92 case style ones fixed the problem.
I found that if you hold a small NE-2 bulb near the transformer, the
gas in the bulb will glow if there is high-voltage AC close to it.
If the bulb glows, the inverter for that section is working OK.
Click to expand...
 
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