1) unplug unit and remove microwave cover (phillips on 3 sides)
2) unscrew white funnel shaped plastic part near back of control panel
3) remove specialty bulb and disconnect leads
4) look for T170 bulb replacement (eBay has them) or roll your own 25W bulb solution
SOURCE: Replace Blub GE Microwave oven Model 1540
On my Spacemaker, access for bulb replacement is on the top of the chassis, which is under the top/side cover. From a diagram I looked at, it appears that yours is similar. If so, you have to:
1. UNPLUG the microwave and then remove the three retaining screws that you'll find on shelf or cabinet above the microwave. Get help; the front of the microwave will be heavy when the screws come loose from the top.
2. Rotate the front of the microwave down a little and lift the rear up about a half-inch. At this point, it is free from the rear mounting plate. Set the microwave on a suitable work surface.
3. Remove the top/side cover piece. To do this, remove all the small screws on the top, the back, and the bottom edges on each side. Then slide cover back about an inch and lift it off.
4. In the middle section of the top of the chassis, you'll then see a cover above the location of the bulb. Lift it up to get access to the bulb.
It's a lame design for an over-the-range unit, but that's the way it is.
Here's a link to a diagram of what it looks like after you get the cover off: http://www.partselect.com/MultiModels.aspx?ModelNum=jvm1640sj&searchTerm=img_00115013i05&RefineSearch=0&imgMfg=GE
SOURCE: Replacement light bulb for GE spacemaker microwave
That model number doesn't look quite right, but nevertheless:
If
there's no obvious removable cover over the bulb (and the owner's
manual doesn't address it) some disassembly may be required.
Always unplug a microwave before removing or installing any bulbs.
If
it's an over the range type, remove the vent grille across the top and
see if bulbs can be accessed there. There may be a panel on the bottom
covering the light(s), instead.
If not, chances are
you'll have to remove it from the wall, then remove the outer cover. If
so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.
Once it's out of the wall, the outer cover (wrapper) will need to be removed, just as you'll need to do on a counter top model.
On a counter top model, be sure it's unplugged, but otherwise ignore the instructions above this paragraph.
The
screws you need to remove should be pretty obvious, but a special
driver (such as a T20H Torx type or GTXH20-100) may be needed.
Be sure to put all the screws back in the right holes, since some may be special grounding screws.
Bulbs can be had in most grocery stores, hardware stores, home improvement centers, and big box or department stores.
Many models use halogen lamps. You must not touch the new one with your bare skin, as the oils will shorten the bulb life.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
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