Protrack I K45 Relay

Protrack I K45 Relay
« on: December 16, 2021, 04:51:51 PM »
Hello

Can anyone tell me where the K45 relay is located on the main Board , I have located the other three any help would be great.

Thanks

Gulfway
« Last Edit: December 16, 2021, 05:02:20 PM by gulfway »

Re: Protrack I K45 Relay
« Reply #1 on: December 17, 2021, 04:55:51 AM »
serial number KJ3 version: Starting around the front "A" channel corner: 
K33 relay (channel A is short to channel B),
K34 relay (channel A is short to GND),
K35 relay (channel A input relay - front banana socket),
K45 relay (channel B input relay - front banana socket),
K36 relay (channel B is short to GND).

They are located under the CRT.


serial number KJ2 version: Starting around the front "A" channel corner: 
K33 relay
K34 relay (channel A is short to GND)
K35 relay (channel A input relay - front banana socket) (double pole single throw contact)
K36 relay (channel B is short to GND)

K45 relay (channel B input relay - front banana socket) maybe soldering side?)

They are located under the CRT.
« Last Edit: December 20, 2021, 02:56:24 AM by fetron »

Re: Protrack I K45 Relay
« Reply #2 on: December 17, 2021, 07:39:21 AM »
fetron

Thank You , looks as I need to get my eyes checked

gulfway

Re: Protrack I K45 Relay
« Reply #3 on: December 22, 2021, 01:33:54 PM »
I have replaced all of the relays , listed in the report and still getting the same error.
Any thoughts ?

Have enclosed the complete report file.

Re: Protrack I K45 Relay
« Reply #4 on: December 22, 2021, 11:10:37 PM »
Try reprogramming the Flash Prom on the ProTrack.

Does it work well when used in desktop mode (without a workstation)?
« Last Edit: December 22, 2021, 11:13:12 PM by fetron »

Re: Protrack I K45 Relay
« Reply #5 on: December 27, 2021, 08:42:14 PM »
I have reprogrammed the unit , still no luck .
The unit in stand alone mode display this as pictured .

Re: Protrack I K45 Relay
« Reply #6 on: December 27, 2021, 11:17:49 PM »

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Re: Protrack I K45 Relay
« Reply #7 on: December 29, 2021, 09:34:00 AM »
Check the range resistors on the ProTrack input circuitry. Damage to these is the common problem we see.
Thanks.
Admin
The most important troubleshooting tool is your eyes.

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Re: Protrack I K45 Relay
« Reply #8 on: January 27, 2022, 04:17:55 PM »
I believe the Relays here under the CRT can cause some strange problems on an old ProTrack as shown on attached photo.
An update on the fault would be interesting.
« Last Edit: January 27, 2022, 04:19:47 PM by jvthorsley »

Re: Protrack I K45 Relay
« Reply #9 on: February 28, 2022, 01:35:46 PM »
I have checked all of the range resistors they are OK.
fetron pointed out a document that helped me isolate the problem to a (cdi 215D5FS) dc to dc convertor U49 that did not pass any voltage to the regulator.

Are there any current model dc convertors ? this part number is very old I may have to buy from overseas at a very high price.

Thanks fetron for the help

gulfway

 

Re: Protrack I K45 Relay
« Reply #10 on: March 01, 2022, 02:22:59 AM »
The original dc-dc converter pinout:
(1) +5V input, (2) -15V output, (3) output common, (4,5,6,7,8) blank, (9) not connected,
(10) output common, (11) +15V output, (12) input common

The new dc-dc converter:
A conversion board is required due to the terminal deviation.
https://www.digikey.com/en/products/detail/recom-power/RS-0515D/2321270
« Last Edit: March 01, 2022, 11:21:40 PM by fetron »

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Re: Protrack I K45 Relay
« Reply #11 on: March 01, 2022, 06:58:09 AM »
Thanks for the input, fetron. That part looks like a better solution than the original!
The most important troubleshooting tool is your eyes.

Re: Protrack I K45 Relay
« Reply #12 on: March 02, 2022, 01:41:14 PM »
Thank you fetron for the help, I will order today.