VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #11  
Old 10-25-2020, 07:08 PM
Special Delivery's Avatar
Special Delivery Special Delivery is offline
 
Join Date: Feb 2007
Location: League City, TX
Posts: 598
Default


Walt,
I knew it was coming... just a matter of time.
< touche >
__________________
R. E. "Ernie" Butcher
Friends of the RV-1/Eagle's Nest Projects
"Mentors build the student...
Students build the airplane." -Glen Salmon

Dedicated to the historical preservation of the RV-1 Aircraft
and organized for the purposes of promoting, supporting,
fostering, and engaging in aviation and aerospace education.

www.RV-1.org
www.EaglesNestProjects.org

Last edited by Special Delivery : 10-25-2020 at 07:29 PM.
Reply With Quote
  #12  
Old 10-25-2020, 09:26 PM
Plummit's Avatar
Plummit Plummit is online now
 
Join Date: Apr 2010
Location: Covid Country-SoCal
Posts: 1,109
Default

Quote:
Originally Posted by Walt View Post
Wonder how many folks still use their 25 yr old TV?
No where near the amount of airplanes that have 50 year old radios!

-Marc
__________________
RV-10
N814RV
2020 Donation Made
Reply With Quote
  #13  
Old 10-25-2020, 11:20 PM
Pilot135pd's Avatar
Pilot135pd Pilot135pd is offline
 
Join Date: Jan 2019
Location: Vaca Moo Airport - TA37 in East TEXAS
Posts: 1,338
Default

Quote:
Originally Posted by Vern View Post
Just sent an SL40 to Garmin for power supply issues

Flat rate is ( gulp) 850!
I wish you had searched this forum before you sent it to Garmin. I hate it that Garmin charges so much. I've told many people here that mine was repaired for a flat rate of less than $500 here in Texas and if you send it and it can't be repaired he returns it without charging you for the troubleshooting. Mine's been working great since.
__________________
RV-8 N52VM: OnSpeed Gen2 AOA-3D, Dynon D-180, Autopilot, Titan 0-360A1A, Hartzell C/S, INS-429 IFR & GPS496, WingX & Stratux for backup & ADS-B IN. Enjoying life while building an airpark with FREE campsite for pilots www.facebook.com/VacaMooAirport/

Exempt by 3 out of the 10 ways but I still donated.
Reply With Quote
  #14  
Old 10-26-2020, 09:17 AM
Plummit's Avatar
Plummit Plummit is online now
 
Join Date: Apr 2010
Location: Covid Country-SoCal
Posts: 1,109
Default

Quote:
Originally Posted by Pilot135pd View Post
I wish you had searched this forum before you sent it to Garmin. I hate it that Garmin charges so much. I've told many people here that mine was repaired for a flat rate of less than $500 here in Texas and if you send it and it can't be repaired he returns it without charging you for the troubleshooting. Mine's been working great since.
Does your guy repair other brands (TKM) too? I have a radio in my C-172 that went T.U. with no volume. TKM says it's too old and won't touch it, but they are happy to sell me a new one for $2800. The radio part works but the sound is very faint (audio amplifier?).

-Marc
__________________
RV-10
N814RV
2020 Donation Made
Reply With Quote
  #15  
Old 10-26-2020, 12:02 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,891
Default

Quote:
Originally Posted by Plummit View Post
Does your guy repair other brands (TKM) too? I have a radio in my C-172 that went T.U. with no volume. TKM says it's too old and won't touch it, but they are happy to sell me a new one for $2800. The radio part works but the sound is very faint (audio amplifier?).

-Marc
Get some spray contact cleaner. Open up the radio as needed to gain access to the volume control, spray (you need to get it inside the control, look for an opening), ‘exercise’ the control. See if that fixes it. No guarantees but cheap and easy to try.
Reply With Quote
  #16  
Old 10-26-2020, 12:23 PM
Plummit's Avatar
Plummit Plummit is online now
 
Join Date: Apr 2010
Location: Covid Country-SoCal
Posts: 1,109
Default

Quote:
Originally Posted by BobTurner View Post
Get some spray contact cleaner. Open up the radio as needed to gain access to the volume control, spray (you need to get it inside the control, look for an opening), ‘exercise’ the control. See if that fixes it. No guarantees but cheap and easy to try.
Having been around the block with radios and rf circuits, I would have expected the volume control pot to at least give some indication of a problem that would indicate a dirty wiper was at fault. This radio just quit cold one day, and it was only after trying it with the engine off that I could faintly hear the audio. TX works fine, but exercising the volume pot changed nothing.

But thanks for the suggestion. Right now the radio is at TKM, but they flat told me that they just wouldn't touch it.

The frustrating thing is that they built the radio, now they want to sell me a new one that they presumably won't repair either in a few years....

It's an MX170 nav-comm for the record, and was installed in my 1960 C172 that I use (used?) for Young Eagle flights.

-Marc
__________________
RV-10
N814RV
2020 Donation Made
Reply With Quote
  #17  
Old 10-26-2020, 12:30 PM
Pilot135pd's Avatar
Pilot135pd Pilot135pd is offline
 
Join Date: Jan 2019
Location: Vaca Moo Airport - TA37 in East TEXAS
Posts: 1,338
Default

Here is the info again:

Keith Peshak
235 Colovista Parkway
Bastrop Texas 78602

512-636-0851

$499 flat rate IF they can fix it if not they’ll send it back no charge. He's a "colorful guy" but as long as you follow his instructions EXACTLY as he tells you (don't offer advice or try to change his process or how he ships or does anything else), he fixes them cheaper than Garmin.
__________________
RV-8 N52VM: OnSpeed Gen2 AOA-3D, Dynon D-180, Autopilot, Titan 0-360A1A, Hartzell C/S, INS-429 IFR & GPS496, WingX & Stratux for backup & ADS-B IN. Enjoying life while building an airpark with FREE campsite for pilots www.facebook.com/VacaMooAirport/

Exempt by 3 out of the 10 ways but I still donated.

Last edited by Pilot135pd : 10-26-2020 at 12:32 PM.
Reply With Quote
  #18  
Old 10-26-2020, 12:36 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,891
Default

I agree with your analysis. My suggestion was made in the spirit of ‘Try easy stuff first, even if unlikely’ (I recently wasted hours of my time when I forgot this rule!).
Edit: reply to Marc
Reply With Quote
  #19  
Old 10-26-2020, 12:52 PM
Plummit's Avatar
Plummit Plummit is online now
 
Join Date: Apr 2010
Location: Covid Country-SoCal
Posts: 1,109
Default

I just spoke with Keith (Thank you!) but unfortunately TKM is one of the radios that he won't touch. If the plane was worth more I'd swap the radio out for a KX155 or even a 430w, but it's just not worth the upgrade.

-Marc

Quote:
Originally Posted by Pilot135pd View Post
Here is the info again:

Keith Peshak
235 Colovista Parkway
Bastrop Texas 78602

512-636-0851

$499 flat rate IF they can fix it if not they’ll send it back no charge. He's a "colorful guy" but as long as you follow his instructions EXACTLY as he tells you (don't offer advice or try to change his process or how he ships or does anything else), he fixes them cheaper than Garmin.
__________________
RV-10
N814RV
2020 Donation Made
Reply With Quote
  #20  
Old 10-26-2020, 01:32 PM
rapid_ascent rapid_ascent is offline
 
Join Date: Mar 2008
Location: Dublin, CA
Posts: 1,276
Default

I can't suggest what to do about your cap but I can provide some additional info which you can use as you will.

First off it appears that this cap is in parallel to the one that is right next to it. You could check this with a multimeter and look for 0 ohms. You might also be able see the connecting copper traces on the PCB. For switching power supplies this is often done to provide more capacitive filtering (caps in parallel add). I'm guessing it is the same exact value as the one next to it. Again this is a common design practice. If you were to remove the shorted cap does the circuit operate such that you could measure the voltage across the cap. That might give you an idea of the minimum voltage rating. Typically though a safety margin of 1.5x to 2x is used for design parameters. If the circuit operates it will have more AC ripple that desired by the designer so don't leave it like that.

Also if the cap shorted then the power supply circuit may or may not have current limited. If it did then the remainder of the circuit may still be OK. If it did not or did not soon enough the power supply regulator chip or the out board FETs may also be fried.

If it was me I would remove the cap. Then check with an multimeter the resistance across the cap PCB pads. If it is still shorted or very low resistance then you have additional damage. Then I would send the unit back to Garmin. If it is say over 1K ohms I would power it up and check the voltage. Then you could go down the path of figuring out the replacement cap. You might even be able to remove the parallel cap and measure the value if you have a multimeter which measures capacitance.

I hope this helps. Its up to you how you proceed. I've assumed this is a power supply cap, but that may not be the case. I cant tell from here so its just a guess.

Another option is that is an AC coupling cap for one of the audio paths. If that is the case everything I just said doesn't apply.

I'm willing to help if you want additional guidance.
__________________
Ray Tonks
2020 Donation Paid
Titan IOX-370, Dual PMAGs, 9.6:1 Pistons, FM-150
RV-7 Fuselage in progress
* Cabin Interior - In progress
RV-7 SB Wings
* Both Wings fully skinned
* Fuel Tanks Complete - No leaks finally
* Ailerons Complete
* Flaps Complete
RV-7 Empennage - Complete (a little fiberglass work left)
Vans Training Kit # 2 - Complete
RV-7 Preview Plans
Vans Training Kit #1 - Complete
EAA Sheet Metal Class - Complete

Last edited by rapid_ascent : 10-26-2020 at 01:42 PM.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 08:29 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.