Question about Motorola Talkabout T6400 (22 Channels) 2-Way Radio

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Replacemetn mic on Motorola t6400

Where do i find one. easy to replace it but where do i get one?

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Hello stoyanov,

Accessories for the Motorola TalkAbout series radios are available through many major electronics retailers, or directly from the manufacturer at

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Posted on Apr 17, 2008


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Sorry, parts were never offered for this radio. However, if you watch ebay, you might be able to pick one up for parts, or even a better one than you have at a reasonable price.

Best regards.

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Need to dis-assemble a Motorola Visar handie talkie fm radio. Radio has intermittent volume, lose connection

The radio is easy to disassemble and has no hidden surprises, but I doubt you're going to like what you see once you get it apart. The large screws that are very visible on the outside hold both halves of the outside to the thick radio chasey and mother board.

Your volume problem is typical for older T6400s, and is caused by the speaker binding internally. Motorola does not sell the speaker separately and it is built into the case so you can't really just un-hook it and install a new one in it's place.

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I can't get one handheld of my t6400 talkabout to turn off.

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Motorola RAZR V3

You can find them on E-Bay. They are not easy at all to install. You need a heat gun with a low fan setting and a nozzle to focus the hot air on the area of the mic. The solder contacts are under the microphone. I guess it would be too easy if they made the solder points directly accessible. (LOL)

Once the board is removed from the phone, it is a small rectangular component with a small hole in it. You can find it on the board by orienting the removed board and comparing where the hole by the keypad is. The hole in the keypad housing is directly over where the microphone is on the board.

You have to locally heat the board around the mic slowly with low air pressure until it gets hot enough for the mic to desolder. While heating it, use a pair of tweezers to gently lift the microphone. When it is hot enough to desolder, it will lift right off. Be very careful when removing because neighboring components will also have the solder softened and can move if you even brush them.

After the mic is removed, clean the contact surface. Set the mic in place and then hold with light pressure with a small flat tip screw driver. Again, heat the area around the mic. Do not heat the mic directly because it will burn the microfilament that picks up the vibrations before the solder breaks down to fasten it to the board. If you have to add a little solder, be careful to not add too much. When the heat is to a point that the solder melts, the mic will sit flat to the board. If there is too much solder on the 4 contact points, it will mush out and potentially create a short.

FYI... V3 mic replacement is very high level.

If you don't want to try it yourself, I recommend,

Wireless Unlimited - Cell Phone and Computer Repair
10a-6p M-F EST - 423-913-0488

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Hello. Your mic actually went bad from either liquid damage or a small bump. You need to have the mic either replaced at a motorola service center. Or you can do it yourself. It is quite easy. Just buy the mic from ebay for any old v series motorola phone v300 v400 v500, they are all the same. and just install it yourself. If you dont have a local service center in your area, cant find the part or cant do it yourself, look in my profile and i am sure we can help you out. If you found this helpful, give me a rating!

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