We have an APC UPS that has gone faulty.

APC will not supply a circuit diagram, and do hnot have a repair
facility - their advice is to throw it away and buy aa new one.

If I do that, it certainly won't be an APC one that I buy.

In the meantime I'd still l ike to try and fix the one we have. Has
anyone got any experience of this, or any schematics even?

thanks

Basically a DC to AC inverter with voltage and current protection circuits.
However there are also wave shaping circuits in the AC production section of
the device. In-depth troubleshooting and diagnostics may result in
determining what device is causing the fault however getting appropriate
replacement components may be the challenge. BE advised, the circuitry
produces voltages that may be considered lethal when in operation. Follow
all the safety rules endemic to this kind of service. IMHO: APC makes some
rather nice products, almost all are not consumer serviceable.
Like saying you won't purchase a particular type of soft drink because it
gives you gas and you are uncomfortable as a result. Of course, Neither
Pepsi not Coke will sell you a complete listing of their ingredients?
"Luke Siemaszko" wrote in message
...
We have an APC UPS that has gone faulty.

APC will not supply a circuit diagram, and do hnot have a repair
facility - their advice is to throw it away and buy aa new one.

If I do that, it certainly won't be an APC one that I buy.

In the meantime I'd still l ike to try and fix the one we have. Has
anyone got any experience of this, or any schematics even?

thanks

Like saying you won't purchase a particular type of soft drink because it
gives you gas and you are uncomfortable as a result. Of course, Neither
Pepsi not Coke will sell you a complete listing of their ingredients?


Hardly.
If my car goes wrong I expect to be able to fix it.
If my stereo (assuming it isn't a really cheap one) goes wrong I
wouldn't expect to fix it.

How would you propose fixing a soft drink ??????????

Art wrote:

Basically a DC to AC inverter with voltage and current protection circuits.
However there are also wave shaping circuits in the AC production section of
the device. In-depth troubleshooting and diagnostics may result in
determining what device is causing the fault however getting appropriate
replacement components may be the challenge. BE advised, the circuitry
produces voltages that may be considered lethal when in operation. Follow
all the safety rules endemic to this kind of service. IMHO: APC makes some
rather nice products, almost all are not consumer serviceable.

Thanks. We are fine with electonics generally, just never dealt with a
UPS before.

Thanks for the reply.

its usually a bad battery

Mark

Mark wrote:

its usually a bad battery

Mark


indeed, but there are no LEDS on the front panel, nothing at all - would
a bad battery cause everything to die ?

"Luke Siemaszko" wrote in message
...


Mark wrote:

its usually a bad battery

Mark


indeed, but there are no LEDS on the front panel, nothing at all - would
a bad battery cause everything to die ?


I have seen a bad battery cause a UPS to be totally DOA many times.

Larry

"Luke Siemaszko" wrote in message
...


Mark wrote:

its usually a bad battery

Mark


indeed, but there are no LEDS on the front panel, nothing at all - would a
bad battery cause everything to die ?



Most certainly. if the Battery is totally dead, the UPS will not do a
sausage. Test with car batteries matching the voltage reqd. If it springs
into life, buy new batteries. I have about a dozen UPS devices around the
house all bought as Dead. New batteries fixed EVERY One.

Range from APC BackUPS300 to SmartUPS1400VA, must be a few quids worth if
bought new. Gel batteries are pretty cheap nowadays too

Luke Siemaszko wrote:
In the meantime I'd still l ike to try and fix the one we have. Has
anyone got any experience of this, or any schematics even?

Some of these have automotive-type blade fuses in the battery line on
the circuit board. Also, as has been mentioned, try a new battery.
I have had good luck with Power Sonic and Panasonic brand gel cells.

Note that most of these will go into a test mode for a few seconds on
startup, and when this happens, quite a large current is drawn from
the battery for a moment. If you are lashing up some random battery
you have lying around, use wires at least as large as the ones already
in the UPS. I tried to start up a APC Smart-UPS 600 with not quite
the right batteries and a cheap ~20 gauge clip lead and melted the
clip lead.

If you get it running, but it complains about a low battery even when
you know the battery is fully charged, go to
http://us1.networkupstools.org/faq/ and read the answer to "Q: I
replaced the battery in my APC Smart-UPS and now it thinks the battery
is low all the time. How do you fix this?"

Matt Roberds

We are using a fair number of UPS's around here. We found the APC to be one
of the best. You will find that ALL of the UPS manufactures will NOT supply
ANY service manuals or schematics, or parts.

If your APC unit is dead, there is a 99.9% chance that it is the battery.
Most of their models go in to a protect mode, and completely shut down when
the batteries are warn down.

Replace the batteries with the same amp hour and voltage rating, in the same
combination. This is a safety thing for having the proper charge and load
current. If you buy a set of generic batteries, make sure that the terminals
match, and that you transfer the thermo fuse (if there is one), that is one
stuck on to the battery assembly. This fuse is very important to have in
there.

--

JANA
_____


"Luke Siemaszko" wrote in message
...
We have an APC UPS that has gone faulty.

APC will not supply a circuit diagram, and do hnot have a repair
facility - their advice is to throw it away and buy aa new one.

If I do that, it certainly won't be an APC one that I buy.

In the meantime I'd still l ike to try and fix the one we have. Has
anyone got any experience of this, or any schematics even?

thanks