Microwave repair..

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Printed on: Apr 29 2024

Topic:

Topic author: chandan.ahluwalia
Subject: Microwave repair..
Posted on: Apr 15 2007 08:59:05 AM
Message:

Hey, guys, i have some problem with my microwave,
The microwave thing is working fine but it is also equipped with grill and it doesn't turn on now..
Any idea?
Please help..

Replies:

Reply author: Binary 1011001101
Replied on: Apr 15 2007 12:53:58 PM
Message:

Check the obvious first, Is the element blown/damaged? Check with a multimeter, or dirty connections?
Is the switch/ driver circuit giving out voltage, overtemp cutout OK? anything look wrong inside?

Oh yeh, remember to dischage the HV cap when you open the case...

Reply author: chandan.ahluwalia
Replied on: Apr 15 2007 1:23:24 PM
Message:

Element is fine..
Wires are also in a very good condition..
The oven is LG made.
what are switch/driver and where is over temp cutout located?

Reply author: Binary 1011001101
Replied on: Apr 15 2007 1:44:04 PM
Message:

I dont have a grill in my microwave so I dont know where it will be located, but is should be easy to find the driver board, it will be a PCB with wires, relays and stuff like that on it, It is generally near the controls. There may not be a overtemp cutout.

Also check any internal fuses.

Reply author: chandan.ahluwalia
Replied on: Apr 16 2007 11:36:46 AM
Message:

ok..Thanks...
Anyone else who is having a microwave oven with grill having the same prob?
Please help as i have never opened the Microwave before and don't want to spoil anything..

Reply author: Binary 1011001101
Replied on: Apr 16 2007 12:13:10 PM
Message:

Well, when you open it there is not much you can damage inside unless you start pulling wires, dropping things inside, poking it while it is on and other dumb stuff like that, just make sure it is as how you found it. However it can some damage to you if the high voltage capacitor is not dischaged carefully.

Reply author: chandan.ahluwalia
Replied on: Apr 17 2007 10:13:08 AM
Message:

Okk.. I'll do it..
I know how to discharge the capacitor..
Short it, right?

Reply author: Binary 1011001101
Replied on: Apr 17 2007 11:14:25 AM
Message:

Yep, short it with a insulated screwdriver.

Reply author: chandan.ahluwalia
Replied on: Apr 18 2007 07:49:37 AM
Message:

Ya.. i always do the same..

Reply author: sergiosparks
Replied on: Apr 18 2007 08:30:24 AM
Message:

Draw the wirings or have a picture of them
it will be a lot easier and faster when
re assembling things.

Reply author: cyclopsitis
Replied on: Apr 23 2007 02:43:14 AM
Message:

If it is still not working by now try your fuse? It should have a white ceramic one so you'll have to test with a DMM because you wont be able to see if the fuse is blown.

Reply author: chandan.ahluwalia
Replied on: May 05 2007 11:46:35 AM
Message:

Actualy the Grill is not working.. Micro waves are working fine..
So i don't think the fuse is blown..

Reply author: pearltorto
Replied on: May 05 2007 2:43:50 PM
Message:

hmmmm have you made sure your air intake grill aint plugged with dirt and the like?

Reply author: pebe
Replied on: May 05 2007 4:41:14 PM
Message:

Is there a temperature conrol for the grill? If so it will use a temperature sensor of some sort. It may be a simple bimetal switch or a TDR connected to the micro. See if you can trace the wires.

Reply author: chandan.ahluwalia
Replied on: May 06 2007 07:03:57 AM
Message:

Ok..i'll see to that.. thanks..

Reply author: Binary 1011001101
Replied on: May 07 2007 04:50:06 AM
Message:

I assume that you can take the grill element out, do so and check for voltage where the element was, take out and put back all the gill-related plugs, it could be something like a dirty connection.

Follow the wires back to where they terminate, check that there is voltage coming from the control unit, or check before/after a cutout.

At least then you can narrow things down where the fault is.

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