SDS100/SDS200: Update on SDS100 not receiving issue

Status
Not open for further replies.

NS9710

Member
Joined
Apr 10, 2010
Messages
658
Location
Niagara Falls, NY
After talking to HamRadioOutlet and Uniden, they've denoted that it seems to be a bad battery, or bad battery receiver prongs in the scanner, attached are the pins in the scanner and on the battery, however nothing seems to stand out as far as what's wrong.
 

Attachments

  • download (1).jpg
    download (1).jpg
    37.7 KB · Views: 21
  • download.jpg
    download.jpg
    33.8 KB · Views: 20

KevinC

The big K
Super Moderator
Joined
Jan 7, 2001
Messages
12,783
Location
I'm everywhere Focker!
After talking to HamRadioOutlet and Uniden, they've denoted that it seems to be a bad battery, or bad battery receiver prongs in the scanner, attached are the pins in the scanner and on the battery, however nothing seems to stand out as far as what's wrong.
So the unit doesn't power up? If it does I doubt the battery is the issue.
 

richardbritt

Member
Database Admin
Joined
Sep 17, 2006
Messages
574
Location
Northeastern NC
Please let us know the symptoms. Plenty of us have actually repaired electronic equipment for a living and can offer suggestions. I myself was the service manager for Heathkit in Virginia Beach years ago, and was a technician for the City of Norfolk Radio Repair Shop for a bunch of years.
 

NS9710

Member
Joined
Apr 10, 2010
Messages
658
Location
Niagara Falls, NY
It just randomly quits receiving any signal when on battery power after a random time [with no warning] during scanning, however when on wall power there is no issue.
 

richardbritt

Member
Database Admin
Joined
Sep 17, 2006
Messages
574
Location
Northeastern NC
Have you tried another battery? I bet the voltage is not holding it's voltage and it's not warning of the low voltage. Doesn't sound like it's a scanner issue.
 

richardbritt

Member
Database Admin
Joined
Sep 17, 2006
Messages
574
Location
Northeastern NC
Fully charge the battery, run the scanner and see how long it takes for it to stop receiving. It should last several hours. I have a bcd436hp, not a sd100 but I get like 6 hours on my batteries. Measure the battery voltage after it stops receiving. It's probably low enough for the display to be on, but not enough for the receiver to actually work and process signals
 

NS9710

Member
Joined
Apr 10, 2010
Messages
658
Location
Niagara Falls, NY
I only have the one battery @richardbritt, HRO is shipping me a new battery to see if that's the issue, there is no voltage warnings or anything, the only way I'll know anything is if I light up the display and it goes to the local P25 system and no signal read out.
 

NS9710

Member
Joined
Apr 10, 2010
Messages
658
Location
Niagara Falls, NY
I have it set to 3,350V to alert me on low battery voltage.

Fully charge the battery, run the scanner and see how long it takes for it to stop receiving. It should last several hours. I have a bcd436hp, not a sd100 but I get like 6 hours on my batteries. Measure the battery voltage after it stops receiving. It's probably low enough for the display to be on, but not enough for the receiver to actually work and process signals
 

NS9710

Member
Joined
Apr 10, 2010
Messages
658
Location
Niagara Falls, NY
It has dropped all reception at 3.85V after maybe 4-5 hours scanning.

Fully charge the battery, run the scanner and see how long it takes for it to stop receiving. It should last several hours. I have a bcd436hp, not a sd100 but I get like 6 hours on my batteries. Measure the battery voltage after it stops receiving. It's probably low enough for the display to be on, but not enough for the receiver to actually work and process signals
 

tvengr

Well Known Member
Joined
Feb 10, 2019
Messages
10,786
Location
Baltimore County, MD
Before this acts up the scanner is a steady -77 to -75 value, but once this issue starts it will not register any signals at all until I shut it off and power it back up.
The good news is that RSSI will show -40dbm if the scanner has the cold solder joint problem
 

Ubbe

Member
Joined
Sep 8, 2006
Messages
9,872
Location
Stockholm, Sweden
Both the CPU and the receiver chip runs on 3,3V and the voltage regulator IC needs 3,4V at ambient temperature to keep its output at 3,3V. If it gets hot it needs a higher input voltage and can't supply as much output current. If it drops its 3,3V output it might make the scanner work unreliable. Having 3,85V from battery should be okay but it's probably something wrong with that regulator IC and then needs a higher voltage.

Setting the battery low warning to 3,4V will warn you that the scanner might not work properly and setting it to 3,7V will warn you that you probably have one hour left of normal operation.

/Ubbe
 

werinshades

Member
Premium Subscriber
Joined
Jan 21, 2002
Messages
6,265
Location
Chicago , IL
After reading through all of this, I'd suggest sending it to Uniden repair instead of becoming frustrated with trying different resolutions. Write up a descriptive work order, and send it in. Turnaround has been a couple weeks, and I'm going to take a guess here and say the board is going to have to be replaced. You'll get it back in good operation, and if you still have problems, you have a 90 day window.
 

donc13

Member
Premium Subscriber
Joined
Dec 19, 2002
Messages
1,505
Location
Grand Junction, CO
I agree with @werinshades , if it gets "fixed" by simply turning it off and back on, it's something Uniden should look at. And it will probably take a board replacement. Insure you tell them what update keys you have purchased so they can re-install them if the motherboard needs replaced
 

NS9710

Member
Joined
Apr 10, 2010
Messages
658
Location
Niagara Falls, NY
It was a bad battery, HamRadioOutlet where I bought it from and have a good rep from sent me a replacement battery to test out/swap, and the battery they sent has no issues with the reception dropping out.

I agree with @werinshades , if it gets "fixed" by simply turning it off and back on, it's something Uniden should look at. And it will probably take a board replacement. Insure you tell them what update keys you have purchased so they can re-install them if the motherboard needs replaced
 

NS9710

Member
Joined
Apr 10, 2010
Messages
658
Location
Niagara Falls, NY
It's not an issue of the signal being broken or whatever, it just flat out gets no reception, and I have a SIANET Connect Plus tower less than a mile or so from me, which pushes a -30 to -45 on the reception using a Remtronix 920S

The good news is that RSSI will show -40dbm if the scanner has the cold solder joint problem
 
Status
Not open for further replies.
Top