XTS2500 Fuse?

Josh · Post by **Josh** » Tue Jan 20, 2004 12:53 pm

For whatever reason, my radio quit working- all of a sudden. It doesn't power up, or anything, my guess is that it's the fuse (that's been the case with all of my other radios exhibiting similar problems)

At any rate, where is the fuse, and what does it look like?

-Josh

Josh · Post by **Josh** » Tue Jan 20, 2004 4:05 pm

r0f wrote:Are you sure it wasn't inhibited?

S

Yeah, I was on conventional channels- the radio just doesn't power up anymore. Where's that blasted fuse?

The situation is that I don't have a complete radio. I got some parts today, and slapped them on the VOCON/RF board so I can program it, have a battery on it, and all the proper shielding. (All that's missing is the plastic housing and display now).

I noticed that I forgot to put the orange o-ring type seal on there, so I dismantled it and put it on. When I reassembled it, the radio no longer would power up. Now, I had the battery on there through the whole procedure, but the radio was off while I put the o-ring thing on.

Now, I'm guessing that a bad battery/radio connection, where the connection was constantly being connected and removed might have blown out the fuse. Call it my stupidity for not removing the battery completely.

I'm 95% it's just the silly fuse- because with everything else I've ever had that's what it always ends up being. I'm smart enough to have been in a static-free (or the closest I can get to that) environment, and no static discharge occured, so you can rule that out.

If it's something other than the fuse, then apparently there are some really stupid flaws in all new Motorola radios these days, argh!

-Josh

Does anyone at least know what the fuse would look like? The battery interface is like that of the HT1550 radio, although it's hard to say if the internal workings are more like the HT1550 or the XTS3000.

-Josh

RocketNJ · Post by **RocketNJ** » Wed Jan 21, 2004 7:21 pm

On that radio the fusewould most likely be a surface mount fuse, similar to the MT2000 style fuse.

Double check any flex cable connections.

George

Josh · Post by **Josh** » Wed Jan 21, 2004 7:23 pm

RocketNJ wrote:On that radio the fusewould most likely be a surface mount fuse, similar to the MT2000 style fuse.

Double check any flex cable connections.

George

Nope, not the flex lines, there's only one and it doesn't matter if it were connected or not it only links to the speaker and mic.

I need a good description of what this fuse may look like because NOTHING on the board even looks like a fuse, and the only surface mount fuses I'm really familiar with are those found on the GP300.

-Josh

Post by **wavetar** » Thu Jan 22, 2004 4:34 am

Hello Josh. The fuse is labled F500 in the schematic. I do not have the capability of posting pictures, so I'll attempt to describe it's position on the board. I've also never had an XTS2500 open, so bear with me.

On the side of the board where the side buttons are mounted, there is a cluster of components pretty much dead center of the board, with shields surrounding them on 3 sides and the edge of the board where the switches are located on the fourth side. The largest component in this cluster (the largest on the entire board, by the looks of it) is a ferrite bead, labled E500 in the schematic.

Assuming you are looking at the board with the 'bottom' of the board towards you (and the switches on the left), there should be a small capacitor immediately to the right of E500, lined up dead center with it. Immediately to the right of this capacitor, and up slightly, is the fuse F500. The 'top' trace from E500 goes to the 'top' of this fuse. The 'bottom' trace from the fuse goes to the right & connects to a surface mount transistor VR501 (single-leg side).

That's about as specific as I can get.

**edit**-I sent a picture of the board to your email address.

Todd

Josh · Post by **Josh** » Thu Jan 22, 2004 8:33 am

wavetar wrote:Hello Josh. The fuse is labled F500 in the schematic. I do not have the capability of posting pictures, so I'll attempt to describe it's position on the board. I've also never had an XTS2500 open, so bear with me.

On the side of the board where the side buttons are mounted, there is a cluster of components pretty much dead center of the board, with shields surrounding them on 3 sides and the edge of the board where the switches are located on the fourth side. The largest component in this cluster (the largest on the entire board, by the looks of it) is a ferrite bead, labled E500 in the schematic.

Assuming you are looking at the board with the 'bottom' of the board towards you (and the switches on the left), there should be a small capacitor immediately to the right of E500, lined up dead center with it. Immediately to the right of this capacitor, and up slightly, is the fuse F500. The 'top' trace from E500 goes to the 'top' of this fuse. The 'bottom' trace from the fuse goes to the right & connects to a surface mount transistor VR501 (single-leg side).

That's about as specific as I can get.

**edit**-I sent a picture of the board to your email address.

Todd

I think I found it. It's tiny, black, and labeled with a "P"

It's almost centered on the board, up and to the left a tad from the center hole for the shield.

-Josh

Josh · Post by **Josh** » Thu Jan 22, 2004 12:49 pm