My solution is still visible here: http://www.fixya.com/support/t1083290-sharp_r_9h91b_microwave_oven
But it seems like the site is acting weird or something.
I don't have the other manual, but this repost of my answer covers it all:
Hi, I'm the guy who gave who the service manual link and the long, very
detailed answer that covered just about everything that can make a
You don't actually need the base service
manual since this manual has everything you need to locate the parts
and the part numbers, as well as the overall schematic.
magnetron temperature fuse (ref # 1-7, original part # QFS-TA013WRE0)
is located in section 3-D of the exploded view on page 25. Physically,
it is clipped onto the waveguide above the magnetron and it looks like
the right item in the attached drawing.
The oven thermal cutout
(TCO) (ref # 1-8, original part # RTHM-A024WRE0) is located in section
2-H of the exploded view on page 25. Physically, it is located on the
left side of the chassis near the convection fan assembly and it looks
like the left item in the attached drawing.
The best place to order whichever of these you might need is parts is Tritronics
. If the part numbers have changed, that will show up on their Web site.
testing of these parts is simple continuity testing: With your meter on
the ohms scale (and oven power unplugged of course) measure the
resistance at the terminals of the thermal cutout (TCO). It should read
virtually zero. If it reads high / infinity, then it's open and needs
to be replaced.
You can also place a jumper or clip lead across
the bad (or suspected) device and plug the oven in just long enough to
see if it comes to life. Do not cook with the jumper in place, and
unplug it right away, avoiding contact with any inside wires or
The schematic on page 4 shows you the "order", if
you will, in which the current flows. (Yes, I know it's AC). From the
plug, it goes through the oven thermal cutout, then the magnetron
temperatuere fuse, then the line fuse.
On that schematic, the
very bold black lines show you the essential path required to get power
to the board's low voltage transformer, which should result in a lit
display assuming the boar dis okay.
If you need more help, please feel free to write me at firstname.lastname@example.org.
If this is not a FixYa, I don't know what is! *grin*We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.