BCD396T/BC996T: BCD996T Broken Antenna Connection

[RadioScanner_Woody]

Hi not sure if I can get this fixed. But My BCD996T I broke the antenna connection on the board.

I was using LMR-400 for the antenna cable and the force broke the connection. It damage the circuit board enough that a cannot see where the circuit goes.


It still works just no antenna. Which means crap.


Thanks

It still worke connector on the circuit board. Any chance someone has a picture or other info,

 

[dave3825]

So where is the piece that went from the antenna center pin to the board? Looks like a whole piece is missing.

 

[wtp]

it is not god to have a piece of metal running around in a radio...

 

[nessnet]

Uniden flat rate repair....

 

[GadgetGeek]

Yeah, LMR400 is very stiff. Maybe use a smaller more flexible jumper between your LMR400 and the scanner.

 

[tvengr]

I removed the covers from my 996T to take a look. The antenna connector is connected to the circuit board by miniature coax. The shield is soldered to the circuit board in the square box near the D5 marking on the board. The center conductor is soldered to the circle on the circuit board next to the D51 marking. The shield of the other end of the coax is connected to the ground lug on the antenna connector. The center conductor goes to the center pin of the antenna connector. There is some kind of small disk between the ground lug and the center pin of the antenna connector. What is that wire sticking up?

 

[RadioScanner_Woody]

I removed the covers from my 996T to take a look. The antenna connector is connected to the circuit board by miniature coax. The shield is soldered to the circuit board in the square box near the D5 marking on the board. The center conductor is soldered to the circle on the circuit board next to the D51 marking. The shield of the other end of the coax is connected to the ground lug on the antenna connector. The center conductor goes to the center pin of the antenna connector. There is some kind of small disk between the ground lug and the center pin of the antenna connector. What is that wire sticking up?

Ok great

the centre circuit board where the centre core connects is missing.

do you think the centre core goes to D1? or to other spots ?

The wire sticking up is the ground connection to the connector.


Thanks

 

[dave3825]

The wire sticking up is the ground connection to the connector.

Post another pic but zoom out a little showing that wire to ground connector.

 

[K8EAA]

Did you have any weather event recently? Where did the little coax jumper go to?

 

[tvengr]

The wire sticking up is the ground connection to the connector.

If you look closely, you will see that the wire is a miniature coax. I thought it was just a wire also when I first looked at it. There is a shield and center conductor.

 

[RadioScanner_Woody]

i don't have that inside this unit.

 

[tvengr]

i don't have that inside this unit.

Yours is different than mine. You have a separate ground wire going from the circuit board to the antenna connector ground lug. You need to connect a wire from the center pin of the antenna connector to the pad in the circle next to D51. I measure continuity from the center of the antenna connector to the end of D51 closest to the circle. I assume that D51 and D52 are RF overload protection diodes and I would expect a connection there. If the solder pad has been ripped off of the circuit board and you managed to solder a wire to the end of the diode, I don't know which other connections may have been broken. I see that the lines between the circle and the box around D5 are missing. It appears that a foil between those points was pulled from the board. I removed the other cover and don't see any connection through the circuit board on the other side. It looks like it is time for a trip to Uniden if they will repair it for the standard charge.

 

[crippledchicken]

I would for sure, try to find a schematic unless you can clearly see what traces are damaged. Continuity tests also, can be of help it you have a meter.