Pro 197 scanner

[chrs493]

I have a pro 197 scanner. I noticed it stopped receiving. So i unscrewed the antenna and radio shut off. Which told me I had a ground issue. Sure enough my ground was disconnected. Fixed the wire and scanner is still not scanning. What component could have been affected by this?

 

[tvengr]

Does the display light and what if anything is displayed on the screen?

 

[chrs493]

Everything seems to be functioning normally on display.

 

[tvengr]

Try using an earpiece or headphones. You may have dirty contacts on the headphone or speaker jack muting the internal speaker.

 

[chrs493]

Wouldn't it still stop on a frequency? It wont even stop on a weather frequency now

 

[tvengr]

Is this in a mobile installation? If it doesn't stop scanning, that could be an antenna problem. First, check your squelch setting. Remove the antenna and check if the center pin on the antenna connector is broken off or pushed in.

 

[chrs493]

It is. The antenna i believe was acting as the ground I'm assuming when the ground came disconnected. Thats why im wondering if theres a component that could have been grounded out. Ive swapped antennas same issue.

 

[tvengr]

Not having a ground on the scanner without an antenna would only kill the power. It won't short anything out. Did you swap antennas on the vehicle using the same cable and mount? You could have a shorted or open cable killing the signal. Try plugging in a rear of scanner antenna.

 

[chrs493]

The reason i feel like it shorted something out is because the antenna was hooked up without a ground. Then when i disconnected the antenna the scanner powered off. Thats why i feel like the radio tried to ground itself out on the antenna. Yes i have tried a whole different antenna set up

 

[ind224]

Make sure you have power + and - i.e. good solid connections and at least 12v then your antenna connection even if you are only using the center pin. VCO's want proper voltage. After all that the center pin for the antenna may have broken loose. Just your finger near the connector should bring in weather if you have a nearby station.
Direct enter the weather freq and see if that works.

 

[Bugspro]

I have a pro 197 scanner. I noticed it stopped receiving. So i unscrewed the antenna and radio shut off. Which told me I had a ground issue. Sure enough my ground was disconnected. Fixed the wire and scanner is still not scanning. What component could have been affected by this?

Do you try it with a BNC antenna like 765mm? It's always recommanded to put the scanner off before remove antenna. Maybe you short something in your pro197.

 

[tvengr]

It's always recommanded to put the scanner off before remove antenna. Maybe you short something in your pro197.

Operating a receiver without an antenna is not going to damage anything. Transmitters are a different story.

 

[CycleSycho]

Operating a receiver without an antenna is not going to damage anything. Transmitters are a different story.

Plus 1, unhooking an antenna on a rcvr does nothing but uncouple the receiver input from the lower intensity signals.


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