Protrack 1

Started by volken, August 29, 2024, 07:52:32 AM

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volken

Hello
Maybe someone can help me I have no trace  visible I checked the 6.3voltage and HV they are ok.
Is it possible that the CRT is defect ?

Thanks

Volken

jvthorsley

Hi
Apologise if you have already done this, but have you gone into the menu and turned up the intensity?
I doubt the Tube has failed.

volken

Thank you yes I did this but there is no screen at all .

jvthorsley

Hi
Might be worth reprogramming the Flash Prom.
I have written about this on this Forum before.
Curtis (Tech support) can email you the program.

admin

Also try adjusting the horizontal or vertical trace position. The trace may be off screen.
The most important troubleshooting tool is your eyes.

fetron

#5
Hello Volken!

I would like a picture of the CRT HV power supply PCB !  (Protrack, inside on the back wall)

Thanks.

admin

The most important troubleshooting tool is your eyes.

Al1234

#7
hi, was this a working unit you've had and problem just happened or you got this unit as is?
do you know if all the boards are there inside. if all in place.
I remember I had no trace on a KJ3, I made some adjustment for trace alignment in both the advanced mode and regular and on the inside board (3 potentiometers on the tube board) turned up the intensity and move right, left, up, down and trace appeared.  I think one of those potentiometers make the trace completely fade away.

volken

Yes the unit always worked very well

admin

The HV power supply may have failed. Does it have a large silver module on it (Electronetics, I think)?
The most important troubleshooting tool is your eyes.

Al1234

just to make sure, is this a ProTrack I, model 20 or 20B?

admin

Quote from: Al1234 on September 30, 2024, 09:28:08 PMjust to make sure, is this a ProTrack I, model 20 or 20B?
In this case with a high voltage issue, the model 20 and 20B would be the same. I don't recall exactly when but a redesigned HV supply that did not use the Electronetics module was used in the KJ4 units and possibly KJ3's.
The most important troubleshooting tool is your eyes.

Al1234

I remember I had no trace on a KJ3, I made some adjustment for trace alignment in both the advanced mode and regular and on the inside board (3 potentiometers on the tube board mounted vertical to the left of tube) turned up the intensity and move right, left, up, down and trace appeared.  I think one of those potentiometers makes the trace completely fade away.