Batboard

i have a UHF visar that beeps intermittentantly when i turn it on,
it also alternates between ch 10 and 88 on the display. It sounds like
the chirp and the radio is trying to powerup - but it won't stop with the
boot up,


any adivce?

thanks
[email protected]

Hello,

This is a common problem with this series of radio. There are two theories that I have heard as to what may be going on.

Then first is that the front housing has warped and thereby has flexed the controller board in such a way that one or more of the solder connections has become intermittant.

The second is based on the same premise that the housing has warped. But in this case, it is causing intermittant connections between the controller board and the flex strip that connects the controller to the volume control and the accessory connector.

I am more inclined to believe scenario #1 is at fault here.

I currently have 3 visars that exhibit this same condition. After many trial and errors, I have set them aside until I find a more permanent solution. I have tried replacing the housings to no avail.

Perhaps someone has come up with a better solution (Monty?), but for now, mine will wait until I can justify purchasing a new front housing with the controller board already installed (I have seen them for sale on eBay).

Jerry

Better solution == New radio.

When it comes to the Visar, there simply isn't a "better solution" besides getting a different radio.

-Mike

AB9EO wrote:Hello,

This is a common problem with this series of radio. There are two theories that I have heard as to what may be going on.

Jerry

Jerry pointed out actual facts. Often when the front housing gets pushed in, the controller board gets bent and this causes some of the solder joints under the microcomputer and AFSIC to break loose from the board, causing a variety of funny problems. We either resolder or replace the IC’s with a hot air reflow station. Occasionally the display itself has a problem with missing digit segments. If the intermittent controller didn’t cause this, then the (expensive) display module gets replaced.

Sometimes the pins that hold the controller board in the housing break. This will cause an intermittent loss of power or audio etc. This also happens if the older model controller board, the thin one, is mounted in the newer (deeper) housing. The newer housing can be identified by the two small protrusions in the bottom that latch in the controller board or by the part number.

Another problem can be dirt or pitting of the battery contacts. The original batteries had problems with alignment and would loose contact if moved sideways. These were replaced long ago with a better gold contact arrangement that prevented the radio contacts from riding on the plastic battery edge surrounding the battery contacts.

Nand.

We had in our stock several of these radios and experienced the same type of problem. We had noted that it occurred more with aftermarket batteries than with Motorola. We also noted that if the battery was moved around that the problem could duplicate. Using a pencil eraser and cleaning the radio and battery contacts repaired some radios. One of our personnel also folded a piece of paper and placed it between the battery and the radio. Stopped the battery from shifting around on the radio as much. If this works for you great, if not you have something to trade in on new HT1250s....