Sharp Microwave

R

Ray Batig

Guest
Greetings,

I have a Sharp Microwave R-530BS (now R-530ES). The magnetron went bad. I
took it in fort service and paid for labor since the magnetron was under
warranty. I brought the unit home and plugged it in. The next morning the
clock display was missing a lot of segments. I called the repair place and
was told to unplug for 10 minutes and try again. It didn't help, even
waiting 8 hours. I dragged it back to them, and everything was fine.
Returned home and the next morning display was messed up again. The repair
guy says this happens a lot to them and they test for 4 hours. He said $100
would buy a new part.

I looked inside and see that there is a flat ribbon cable between the
circuit board and the display. The ribbon cable is kinked. Could this be
where the problem is or is there a real need to change out the parts?

I see that there are actually 3 parts to this control. First there is the
power circuit board. This holds the relays etc. Number on it is Sharp
FB030MR KPC-M-PP ... other side says QKITPB030MRE0. The second part is the
control circuit board. It holds the clock circuitry and touch panel
circuitry. Number on it is Sharp FA585DR...Lot No. 0074 B031MR. Last there
is the display itself. The relay board is connected to the circuit control
board by a flat ribbon cable (obvious round semi-flexible wires) soldered at
both ends. The circuit control board is again connected to the display by a
flat ribbon cable ( obvious flat wires or foil) connection to boards is
through some other method than soldering. Does anyone know if I can just
replace the circuit control board and display Vs the total three part
assembly? Does anyone have a working circuit control board and display for
sale?

Thanks in advance for your help and guidance.

Ray Batig
 
"Ray Batig" <rbatig@earthlink.net> writes:

Greetings,

I have a Sharp Microwave R-530BS (now R-530ES). The magnetron went bad. I
took it in fort service and paid for labor since the magnetron was under
warranty. I brought the unit home and plugged it in. The next morning the
clock display was missing a lot of segments. I called the repair place and
was told to unplug for 10 minutes and try again. It didn't help, even
waiting 8 hours. I dragged it back to them, and everything was fine.
Returned home and the next morning display was messed up again. The repair
guy says this happens a lot to them and they test for 4 hours. He said $100
would buy a new part.

I looked inside and see that there is a flat ribbon cable between the
circuit board and the display. The ribbon cable is kinked. Could this be
where the problem is or is there a real need to change out the parts?

I see that there are actually 3 parts to this control. First there is the
power circuit board. This holds the relays etc. Number on it is Sharp
FB030MR KPC-M-PP ... other side says QKITPB030MRE0. The second part is the
control circuit board. It holds the clock circuitry and touch panel
circuitry. Number on it is Sharp FA585DR...Lot No. 0074 B031MR. Last there
is the display itself. The relay board is connected to the circuit control
board by a flat ribbon cable (obvious round semi-flexible wires) soldered at
both ends. The circuit control board is again connected to the display by a
flat ribbon cable ( obvious flat wires or foil) connection to boards is
through some other method than soldering. Does anyone know if I can just
replace the circuit control board and display Vs the total three part
assembly? Does anyone have a working circuit control board and display for
sale?
Click to expand...
The bottom line is that you didn't have this problem before you had
the magnetron replaced. Coincidences are unlikely.

Have you checked for bad solder connections, reseated any plubbable cables,
etc.?

If the display is an LCD, there may be "zebra stripe" connectors linking
it to the PCB. These get dirty.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the feedback form on the S.E.R FAQ Web sites.
 
The Sharp Microwaves have had a lot of failures with the display-controller
devices used in both their tabletop and under counter models. Only way to
repair them is to replace the complete controler as a unit.
"Sam Goldwasser" <sam@saul.cis.upenn.edu> wrote in message
news:6wsmgukaik.fsf@saul.cis.upenn.edu...
"Ray Batig" <rbatig@earthlink.net> writes:

Greetings,

I have a Sharp Microwave R-530BS (now R-530ES). The magnetron went bad.
I
took it in fort service and paid for labor since the magnetron was under
warranty. I brought the unit home and plugged it in. The next morning
the
clock display was missing a lot of segments. I called the repair place
and
was told to unplug for 10 minutes and try again. It didn't help, even
waiting 8 hours. I dragged it back to them, and everything was fine.
Returned home and the next morning display was messed up again. The
repair
guy says this happens a lot to them and they test for 4 hours. He said
$100
would buy a new part.

I looked inside and see that there is a flat ribbon cable between the
circuit board and the display. The ribbon cable is kinked. Could this be
where the problem is or is there a real need to change out the parts?

I see that there are actually 3 parts to this control. First there is
the
power circuit board. This holds the relays etc. Number on it is Sharp
FB030MR KPC-M-PP ... other side says QKITPB030MRE0. The second part is
the
control circuit board. It holds the clock circuitry and touch panel
circuitry. Number on it is Sharp FA585DR...Lot No. 0074 B031MR. Last
there
is the display itself. The relay board is connected to the circuit
control
board by a flat ribbon cable (obvious round semi-flexible wires)
soldered at
both ends. The circuit control board is again connected to the display
by a
flat ribbon cable ( obvious flat wires or foil) connection to boards is
through some other method than soldering. Does anyone know if I can
just
replace the circuit control board and display Vs the total three part
assembly? Does anyone have a working circuit control board and display
for
sale?

The bottom line is that you didn't have this problem before you had
the magnetron replaced. Coincidences are unlikely.

Have you checked for bad solder connections, reseated any plubbable
cables,
etc.?

If the display is an LCD, there may be "zebra stripe" connectors linking
it to the PCB. These get dirty.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work.
To
contact me, please use the feedback form on the S.E.R FAQ Web sites.
Click to expand...
 
Thanks to you both. I will try to see if there is something loose. Sure
sounds like it since things cleared up when I hauled it back to the shop. I
find it hard to believe that Sharp is using such cheap but over priced parts
that you can't take the microwave to the shop without the controls failing.
I will keep you posted on what I find.

Ray

Art <stubby@comcast.net> wrote in message
news:Caidnd4ym_k8Z9zdRVn-sA@comcast.com...
The Sharp Microwaves have had a lot of failures with the
display-controller
devices used in both their tabletop and under counter models. Only way to
repair them is to replace the complete controler as a unit.
"Sam Goldwasser" <sam@saul.cis.upenn.edu> wrote in message
news:6wsmgukaik.fsf@saul.cis.upenn.edu...
"Ray Batig" <rbatig@earthlink.net> writes:

Greetings,

I have a Sharp Microwave R-530BS (now R-530ES). The magnetron went
bad.
I
took it in fort service and paid for labor since the magnetron was
under
warranty. I brought the unit home and plugged it in. The next morning
the
clock display was missing a lot of segments. I called the repair place
and
was told to unplug for 10 minutes and try again. It didn't help, even
waiting 8 hours. I dragged it back to them, and everything was fine.
Returned home and the next morning display was messed up again. The
repair
guy says this happens a lot to them and they test for 4 hours. He said
$100
would buy a new part.

I looked inside and see that there is a flat ribbon cable between the
circuit board and the display. The ribbon cable is kinked. Could this
be
where the problem is or is there a real need to change out the parts?

I see that there are actually 3 parts to this control. First there is
the
power circuit board. This holds the relays etc. Number on it is Sharp
FB030MR KPC-M-PP ... other side says QKITPB030MRE0. The second part is
the
control circuit board. It holds the clock circuitry and touch panel
circuitry. Number on it is Sharp FA585DR...Lot No. 0074 B031MR. Last
there
is the display itself. The relay board is connected to the circuit
control
board by a flat ribbon cable (obvious round semi-flexible wires)
soldered at
both ends. The circuit control board is again connected to the display
by a
flat ribbon cable ( obvious flat wires or foil) connection to boards
is
through some other method than soldering. Does anyone know if I can
just
replace the circuit control board and display Vs the total three part
assembly? Does anyone have a working circuit control board and display
for
sale?

The bottom line is that you didn't have this problem before you had
the magnetron replaced. Coincidences are unlikely.

Have you checked for bad solder connections, reseated any plubbable
cables,
etc.?

If the display is an LCD, there may be "zebra stripe" connectors linking
it to the PCB. These get dirty.

--- sam | Sci.Electronics.Repair FAQ Home Page:
http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info:
http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work.
To
contact me, please use the feedback form on the S.E.R FAQ Web sites.
Click to expand...
 
Greetings,

I finally got back to being in town and having enough time to do some in
depth troubleshooting. what I have found is that the flat ribbon cable, foil
ribbons, between the control circuit board and the LED display must be the
culprit. When I have the box open and the clock set, then set 8888 I get
Backward E backward C 1 on the left and nothing in the last spot. The flat
ribbon cable is in an inverted U. When I rub across the cable which flexes
it, the unlit segments of the 8888 light up and go off. This cable connects
to the landing spots on the circuit boards with no apparent solder
connections. Almost looks like a spot weld. Do either of you, or others
reading this message know how this connection is made? Can I strip off the
flat ribbon cable and solder fine wires in its place? Any other ideas?

Thanks again for your help!

Ray

Ray Batig <rbatig@earthlink.net> wrote in message
news:ij81c.16024$yZ1.7408@newsread2.news.pas.earthlink.net...
Thanks to you both. I will try to see if there is something loose. Sure
sounds like it since things cleared up when I hauled it back to the shop.
I
find it hard to believe that Sharp is using such cheap but over priced
parts
that you can't take the microwave to the shop without the controls
failing.
I will keep you posted on what I find.

Ray

Art <stubby@comcast.net> wrote in message
news:Caidnd4ym_k8Z9zdRVn-sA@comcast.com...
The Sharp Microwaves have had a lot of failures with the
display-controller
devices used in both their tabletop and under counter models. Only way
to
repair them is to replace the complete controler as a unit.
"Sam Goldwasser" <sam@saul.cis.upenn.edu> wrote in message
news:6wsmgukaik.fsf@saul.cis.upenn.edu...
"Ray Batig" <rbatig@earthlink.net> writes:

Greetings,

I have a Sharp Microwave R-530BS (now R-530ES). The magnetron went
bad.
I
took it in fort service and paid for labor since the magnetron was
under
warranty. I brought the unit home and plugged it in. The next
morning
the
clock display was missing a lot of segments. I called the repair
place
and
was told to unplug for 10 minutes and try again. It didn't help,
even
waiting 8 hours. I dragged it back to them, and everything was fine.
Returned home and the next morning display was messed up again. The
repair
guy says this happens a lot to them and they test for 4 hours. He
said
$100
would buy a new part.

I looked inside and see that there is a flat ribbon cable between
the
circuit board and the display. The ribbon cable is kinked. Could
this
be
where the problem is or is there a real need to change out the
parts?

I see that there are actually 3 parts to this control. First there
is
the
power circuit board. This holds the relays etc. Number on it is
Sharp
FB030MR KPC-M-PP ... other side says QKITPB030MRE0. The second part
is
the
control circuit board. It holds the clock circuitry and touch panel
circuitry. Number on it is Sharp FA585DR...Lot No. 0074 B031MR. Last
there
is the display itself. The relay board is connected to the circuit
control
board by a flat ribbon cable (obvious round semi-flexible wires)
soldered at
both ends. The circuit control board is again connected to the
display
by a
flat ribbon cable ( obvious flat wires or foil) connection to boards
is
through some other method than soldering. Does anyone know if I can
just
replace the circuit control board and display Vs the total three
part
assembly? Does anyone have a working circuit control board and
display
for
sale?

The bottom line is that you didn't have this problem before you had
the magnetron replaced. Coincidences are unlikely.

Have you checked for bad solder connections, reseated any plubbable
cables,
etc.?

If the display is an LCD, there may be "zebra stripe" connectors
linking
it to the PCB. These get dirty.

--- sam | Sci.Electronics.Repair FAQ Home Page:
http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info:
http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer
work.
To
contact me, please use the feedback form on the S.E.R FAQ Web sites.
Click to expand...
 
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