Kustom Talon 35.5 Troubleshooting (1 Viewer)

InsipidMonkey

Premium Monkey
Advanced User
Premium Member
Acceptus
Joined
Mar 22, 2017
Messages
5,243
Reaction score
9,913
Awards
0
Location
New England
Rating - 100%
3   0   0
I recently picked up a used Kustom Talon in non-working condition to mess around with. I troubleshooted some power issues and repaired some loose connections within the unit, and got it to power up. It passes the self-test and is transmitting at 35.5, but I am not getting any speeds displayed (either vehicles or tuning fork). Un-squelcing the audio just sounds like white noise/static.

Any ideas?
 

Choose Life

35.5 hater R3 Day One User
Advanced User
Premium Member
Joined
Jan 14, 2017
Messages
7,720
Reaction score
8,858
Awards
0
Location
Charlotte North Carolina
Rating - 0%
0   0   0
Bad receiver?
Sounds like its not calculating the doppler shift waves once they bounce back
 

radarrob

Newcumber
Advanced User
Premium Member
Joined
Oct 28, 2010
Messages
9,578
Reaction score
3,065
Awards
0
Location
USA
Rating - 100%
25   0   0
Bad microwave fried.
 

InsipidMonkey

Premium Monkey
Advanced User
Premium Member
Acceptus
Joined
Mar 22, 2017
Messages
5,243
Reaction score
9,913
Awards
0
Location
New England
Rating - 100%
3   0   0
The microwave source is fine, and I can pick it up with an RD. It seems to be something on the receive side, either the detector diode or something in the DSP signal path.

The schematics are in the FCC filing. I'll see if I can figure out where the problem is.
fccid.io: TAL Schematics Kustom Signals Inc
 

Choose Life

35.5 hater R3 Day One User
Advanced User
Premium Member
Joined
Jan 14, 2017
Messages
7,720
Reaction score
8,858
Awards
0
Location
Charlotte North Carolina
Rating - 0%
0   0   0
The microwave source is fine, and I can pick it up with an RD. It seems to be something on the receive side, either the detector diode or something in the DSP signal path.

The schematics are in the FCC filing. I'll see if I can figure out where the problem is.
fccid.io: TAL Schematics Kustom Signals Inc
Keep at it
My PL2 would power up but quit locking speeds
Took it apart lined it up tightened it down
Works better than before

Was worried when i found a high class 3 laser inside and if a part needed replaced i wouldnt of known which

Complex machines to troubleshoot to say the least
Simple to repair once you know whats wrong and have the materials
 

radarrob

Newcumber
Advanced User
Premium Member
Joined
Oct 28, 2010
Messages
9,578
Reaction score
3,065
Awards
0
Location
USA
Rating - 100%
25   0   0
The microwave source is fine, and I can pick it up with an RD. It seems to be something on the receive side, either the detector diode or something in the DSP signal path.

The schematics are in the FCC filing. I'll see if I can figure out where the problem is.
fccid.io: TAL Schematics Kustom Signals Inc
Of course it will alert to a detector with out speed. It’s a bad diode/microwave that needs replacing. My Stalker II microwave long time ago had same experience very loud static,would not read speed and also not read a fork. Stalker put a new microwave on it and till this day works amazing.

--- DOUBLEPOST MERGED ---

I have a couple units that won’t power on. Care to share what might need to be fixed/replacement or trouble shoot.
 

InsipidMonkey

Premium Monkey
Advanced User
Premium Member
Acceptus
Joined
Mar 22, 2017
Messages
5,243
Reaction score
9,913
Awards
0
Location
New England
Rating - 100%
3   0   0
That's the odd thing, it looked like this unit had a brand new microwave unit, and the Gunn oscillator half wasn't even properly connected. It looks like the Schottky diode is in the bottom half of the unit, maybe it isn't properly connected to the PCB? When I have time I'll open it up again and check.

As far as power issues, I just traced the power path into the gun with a multimeter until I found breaks.

Is the handle providing the correct amount of power (~7.8V I think)? The pinout is in the circuit diagram linked above.

The handle slides into a PCB at the bottom of the gun. I cleaned the contacts with an eraser. This PCB is connected to the main circuit board via a ribbon cable that is accessed when the main circuit board is slid out. Make sure it is properly connected and not damaged. I found some pins bent in the connector the cable plugs into on mine. Straightening them out allowed the ribbon cable to seat properly and make a good connection.

Another ribbon cable attaches the screen to the main circuit board, and the small connector next to it powers the speaker. Make sure these are properly connected and not damaged.

I'll take pictures of the above parts when I have the unit open again.
 

GTO_04

Premium Member
Advanced User
Premium Member
Joined
May 21, 2011
Messages
4,230
Reaction score
4,370
Awards
0
Rating - 0%
0   0   0
Of course it will alert to a detector with out speed. It’s a bad diode/microwave that needs replacing. My Stalker II microwave long time ago had same experience very loud static,would not read speed and also not read a fork. Stalker put a new microwave on it and till this day works amazing.

--- DOUBLEPOST MERGED ---

I have a couple units that won’t power on. Care to share what might need to be fixed/replacement or trouble shoot.
On the Talon, the conductive rubber power on switch is a weak spot. The conductive rubber wears down and doesn't make good contact.

GTO_04
 

InsipidMonkey

Premium Monkey
Advanced User
Premium Member
Acceptus
Joined
Mar 22, 2017
Messages
5,243
Reaction score
9,913
Awards
0
Location
New England
Rating - 100%
3   0   0
So I had some more time to work on this. Turns out the receive side diode wasn't attached to the PCB either!

Here are some pictures of the teardown:

Battery handle connector. I cleaned these contacts with an eraser. There are some on top too, but I didn't bother removing those screws to get at them.
0329181322a.jpg


As you slide the radar assembly out of the case, you expose this ribbon cable under the main PCB. Gently remove it being careful not to damage the ribbon cable.
0329181322.jpg


When I received this unit, some of these pins were bent and the connector was not properly seated.
0329181324.jpg


View of the entire assembly with daughter PCBs detached.
0329181324a.jpg


The black cylinder in the middle of this picture I believe to be the Schottky diode from the receive circuitry. (Edit: Just a normal diode. Schottky diode is in the waveguide (gold box)). It should be attached to that hole labeled "DET +", but is just hanging free.
0329181339.jpg


So I soldered it back into place.
0329181350.jpg



Success!
0329181358.jpg
 
Last edited:

benzr

Been there done that !! Original V1 user !!
Advanced User
Joined
Apr 23, 2012
Messages
4,760
Reaction score
5,347
Awards
0
Location
FLA
Rating - 100%
1   0   0
Ok I'm IMPRESSED !!

Great job.

The sinister side in me thinks that might have been "purposefully decommissioned ". Especially the Final i can use it but not obtain speed readings !!

I know a certain 3 Letter Govt agency that would do that on smartcard readers .. or so I read about.

Great job !!! +1 for us "sheep".




Posted from my iPhone using the RDF Mobile App!
 

Tallyho

Premium Member
Advanced User
Premium Member
Joined
Mar 21, 2013
Messages
2,669
Reaction score
4,590
Awards
0
Rating - 100%
2   0   0
Congrats on getting it working!

Of course you know this means we will be sending our non working units to you for refurb.
 

InsipidMonkey

Premium Monkey
Advanced User
Premium Member
Acceptus
Joined
Mar 22, 2017
Messages
5,243
Reaction score
9,913
Awards
0
Location
New England
Rating - 100%
3   0   0
The sinister side in me thinks that might have been "purposefully decommissioned ".
I actually think it was in the process of being repaired when it was sold. The radar unit (Gunn oscillator and receiver) are new, they just were never properly attached to the PCB. I noticed the oscillator wasn't attached the first time I took it apart and connected that to get it to transmit, but I didn't realize the receive side was disconnected as well.

Glad I got it working!

--- DOUBLEPOST MERGED ---

Congrats on getting it working!

Of course you know this means we will be sending our non working units to you for refurb.
Thanks! I actually have another unit on my bench awaiting parts. Luckily both of them have relatively minor issues and were easy to troubleshoot.

I'd be happy to take a look at non-functioning units if you want, with the proviso that electronics are just a hobby for me so there is no guarantee I won't make things worse when trying to fix it :)

--- DOUBLEPOST MERGED ---

Anyone have any idea what these DIP switches do?

upload_2018-3-29_15-15-49.png
 
Last edited:

benzr

Been there done that !! Original V1 user !!
Advanced User
Joined
Apr 23, 2012
Messages
4,760
Reaction score
5,347
Awards
0
Location
FLA
Rating - 100%
1   0   0
Ok i put "paranoid" benzr in the Time out room L0L

My alter ego has seen much and tends to distrust "strange" occurrences ... such as "not finished" repairs etc.

So you're the one to send our electronics to ..... KewL.


Posted from my iPhone using the RDF Mobile App!
 

InsipidMonkey

Premium Monkey
Advanced User
Premium Member
Acceptus
Joined
Mar 22, 2017
Messages
5,243
Reaction score
9,913
Awards
0
Location
New England
Rating - 100%
3   0   0
Anyone have any idea what these DIP switches do?

@DBMW30 Would you be willing to partially disassemble your moving mode Falcon HR to peek in and see what these DIP switches are set to? Just need to loosen the 4 Phillips head screws on the front. I'm wondering if these control things like moving/stationary and MPH/KPH?
 

InsipidMonkey

Premium Monkey
Advanced User
Premium Member
Acceptus
Joined
Mar 22, 2017
Messages
5,243
Reaction score
9,913
Awards
0
Location
New England
Rating - 100%
3   0   0
@InsipidMonkey So i just took off the front panel and took a few shots of the internals at different views/angles. I didn't see any toggle switches in there and mine doesn't have the larger antenna horn like the Talon in your pics.
Cool! Thanks for the pictures.

You're right, it looks like an updated circuit board design compared to the original Talon, and the DSP version is newer. I believe the Falcon HR uses a linearly polarized patch antenna, vs the conventional Gunn oscillator and microwave horn in the Talon.

I appreciate you taking the time to check! I guess it's time to open mine up again and flip some switches...
 

Allan Mx

Learning to Drive
General User
Joined
Nov 16, 2018
Messages
2
Reaction score
1
Awards
0
Rating - 0%
0   0   0
I actually think it was in the process of being repaired when it was sold. The radar unit (Gunn oscillator and receiver) are new, they just were never properly attached to the PCB. I noticed the oscillator wasn't attached the first time I took it apart and connected that to get it to transmit, but I didn't realize the receive side was disconnected as well.

Glad I got it working!

--- DOUBLEPOST MERGED ---



Thanks! I actually have another unit on my bench awaiting parts. Luckily both of them have relatively minor issues and were easy to troubleshoot.

I'd be happy to take a look at non-functioning units if you want, with the proviso that electronics are just a hobby for me so there is no guarantee I won't make things worse when trying to fix it :)

--- DOUBLEPOST MERGED ---

Anyone have any idea what these DIP switches do?

View attachment 77281
Pin 5, OFF=MPH, ON=KPH

--- DOUBLEPOST MERGED ---

I actually think it was in the process of being repaired when it was sold. The radar unit (Gunn oscillator and receiver) are new, they just were never properly attached to the PCB. I noticed the oscillator wasn't attached the first time I took it apart and connected that to get it to transmit, but I didn't realize the receive side was disconnected as well.

Glad I got it working!

--- DOUBLEPOST MERGED ---



Thanks! I actually have another unit on my bench awaiting parts. Luckily both of them have relatively minor issues and were easy to troubleshoot.

I'd be happy to take a look at non-functioning units if you want, with the proviso that electronics are just a hobby for me so there is no guarantee I won't make things worse when trying to fix it :)

--- DOUBLEPOST MERGED ---

Anyone have any idea what these DIP switches do?

View attachment 77281
Pin 5, OFF=MPH, ON=KPH
 

Users Who Are Viewing This Thread (Users: 0, Guests: 0)

Unregistered User Ad


ATTENTION: Want ads to disappear? Register for an account here - it's free and NO ADS ARE DISPLAYED TO REGISTERED MEMBERS! Thanks!

Donation drives

RDF Server & License Fees (MAY 2019) (ACTIVE)

This donation drive covers the server and licensing fees for RDF for the month of May 2019...
Goal
$147.00
Earned
$165.00
This donation drive ends in

Latest threads

Latest posts

Social Group Activity

Forum statistics

Threads
81,706
Messages
1,222,519
Members
18,878
Latest member
Blockerm
Top