Panasonic inverter microwave repair

[Trevor Wilson]

I have a very nice (read: expensive) Panasonic microwave oven in for
service. It will actually end up being mine, when it's completed. It uses a
SMPS and has some nice features. The display and control systems seem to
work just fine. Anyway, it throws the earth leakage detector switch when
attempting to cook. Once of the power transistors measures S/C, so my
intention is to replace both transistors (with OEM parts), along with the
bridge rectifier (which is suggested by the manufacturer). The question is
this:

If I replace the power supply parts, how likely is it that the magetron is
faulty and the power supply will, again, be destroyed on power up?

Should I replace the magetron on spec? I checked the terminals to earth and
there appears to be no leakage, but you can never tell with these critters.
I guess it's safe to Megger test the magnetron (500 Volts)?

I don't usually do microwave ovens, so this is new territory for me.

TIA


--
Trevor Wilson
www.rageaudio.com.au

 

[Meat Plow]

On Thu, 10 Mar 2011 19:38:13 +1100, Trevor Wilson wrote:

I have a very nice (read: expensive) Panasonic microwave oven in for
service. It will actually end up being mine, when it's completed. It
uses a SMPS and has some nice features. The display and control systems
seem to work just fine. Anyway, it throws the earth leakage detector
switch when attempting to cook. Once of the power transistors measures
S/C, so my intention is to replace both transistors (with OEM parts),
along with the bridge rectifier (which is suggested by the
manufacturer). The question is this:

If I replace the power supply parts, how likely is it that the magetron
is faulty and the power supply will, again, be destroyed on power up?

Should I replace the magetron on spec? I checked the terminals to earth
and there appears to be no leakage, but you can never tell with these
critters. I guess it's safe to Megger test the magnetron (500 Volts)?

I don't usually do microwave ovens, so this is new territory for me.

TIA

My crystal ball is in for NIST certification so I can't conjure up an
answer for you.



--
Live Fast Die Young, Leave A Pretty Corpse

 

[Michael A. Terrell]

Meat Plow wrote:

On Thu, 10 Mar 2011 19:38:13 +1100, Trevor Wilson wrote:

I have a very nice (read: expensive) Panasonic microwave oven in for
service. It will actually end up being mine, when it's completed. It
uses a SMPS and has some nice features. The display and control systems
seem to work just fine. Anyway, it throws the earth leakage detector
switch when attempting to cook. Once of the power transistors measures
S/C, so my intention is to replace both transistors (with OEM parts),
along with the bridge rectifier (which is suggested by the
manufacturer). The question is this:

If I replace the power supply parts, how likely is it that the magetron
is faulty and the power supply will, again, be destroyed on power up?

Should I replace the magetron on spec? I checked the terminals to earth
and there appears to be no leakage, but you can never tell with these
critters. I guess it's safe to Megger test the magnetron (500 Volts)?

I don't usually do microwave ovens, so this is new territory for me.

TIA

My crystal ball is in for NIST certification so I can't conjure up an
answer for you.

Don't waste your money. Those Japanese models are too small to get
decent accuracy. ;-)


--
You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
Teflon coated.

 

[Franc Zabkar]

On Thu, 10 Mar 2011 19:38:13 +1100, "Trevor Wilson"
<trevor@rageaudio.com.au> put finger to keyboard and composed:

I have a very nice (read: expensive) Panasonic microwave oven in for
service. It will actually end up being mine, when it's completed. It uses a
SMPS and has some nice features. The display and control systems seem to
work just fine. Anyway, it throws the earth leakage detector switch when
attempting to cook. Once of the power transistors measures S/C, so my
intention is to replace both transistors (with OEM parts), along with the
bridge rectifier (which is suggested by the manufacturer). The question is
this:

If I replace the power supply parts, how likely is it that the magetron is
faulty and the power supply will, again, be destroyed on power up?

Should I replace the magetron on spec? I checked the terminals to earth and
there appears to be no leakage, but you can never tell with these critters.
I guess it's safe to Megger test the magnetron (500 Volts)?

I don't usually do microwave ovens, so this is new territory for me.

TIA

FWIW, I repaired a Panasonic inverter microwave oven a couple of years
ago. After replacing the power transistors the oven worked fine.
However, I don't recall that it tripped the ELCB beforehand. Moreover,
I gave the oven away, so I don't know if it is still working.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Trevor Wilson]

Franc Zabkar wrote:

On Thu, 10 Mar 2011 19:38:13 +1100, "Trevor Wilson"
trevor@rageaudio.com.au> put finger to keyboard and composed:

I have a very nice (read: expensive) Panasonic microwave oven in for
service. It will actually end up being mine, when it's completed. It
uses a SMPS and has some nice features. The display and control
systems seem to work just fine. Anyway, it throws the earth leakage
detector switch when attempting to cook. Once of the power
transistors measures S/C, so my intention is to replace both
transistors (with OEM parts), along with the bridge rectifier (which
is suggested by the manufacturer). The question is this:

If I replace the power supply parts, how likely is it that the
magetron is faulty and the power supply will, again, be destroyed on
power up?

Should I replace the magetron on spec? I checked the terminals to
earth and there appears to be no leakage, but you can never tell
with these critters. I guess it's safe to Megger test the magnetron
(500 Volts)?

I don't usually do microwave ovens, so this is new territory for me.

TIA

FWIW, I repaired a Panasonic inverter microwave oven a couple of years
ago. After replacing the power transistors the oven worked fine.
However, I don't recall that it tripped the ELCB beforehand. Moreover,
I gave the oven away, so I don't know if it is still working.

**Thanks Frank. I believe I'll take the chance.


--
Trevor Wilson
www.rageaudio.com.au