|
|
Post by jukenorman on Feb 4, 2024 14:47:57 GMT
I'm certain that Marty has already pointed out to you that the pulses from the wallboxes are switched grounds - so if the ground is dodgy in any way, it's only because of contacts in the wallbox that are deficient or you have a poor ground in the first place (which might actually be well worth a check - has the obvious been missed?). The 30V going to the wallbox is not connected to the signal pulses in any way, it's there to power lights, solenoids and the motor. The pulses (grounds) switch the thyratron.....and we've been here before!
Norman.
|
|
|
|
Post by jukeboxmarty on Feb 4, 2024 16:54:34 GMT
You asked......I just wonder if the wall box sends a stronger pulse then the app. pete No, the wallbox just sends grounding pulses. ...i also wonder if the signal is weaker from the wall box than the new VG amp and if it affects the switches. If this keeps up the thread will be locked.
|
|
|
|
Post by jukeboxmarty on Feb 4, 2024 17:37:41 GMT
A word about troubleshooting... Troubleshooting is not merely trying to identify an issue by 'what looks bad'. Visual observation may be an important part of successful repair, but is certainly not the primary troubleshooting method. Wholesale replacement of parts or components is NOT troubleshooting... "A troubleshooter could check each component in a system one by one, substituting known good components for each potentially suspect one. However, this process of "serial substitution" can be considered degenerate when components are substituted without regard to a hypothesis concerning how their failure could result in the symptoms being diagnosed." - Wikipedia Likewise, adjusting and cleaning switches and/or mechanical components is NOT troubleshooting. Troubleshooting IS arriving at a hypothesis based on electrical or mechanical knowledge OF HOW SOMETHING WORKS. You cannot troubleshoot an item without prior knowledge of electrical or mechanical theory, or without knowing the item's sequence of operation.
At this forum we try to answer questions based on the benefit of prior knowledge. We assume that the person asking for assistance is trying to understand how a circuit or mechanical assembly functions. Without considering the underlying theory, there is nothing to be learned.
My suggestion for successful troubleshooting is to take some time to learn how something is supposed to work, both electrically and mechanically...
We can't offer advise to a 'loose cannon' approach to repairs.
|
|
|
|
Post by prime on Feb 4, 2024 18:55:04 GMT
I don't feel i am using a loose canon approach but respect your opinion, and my goal has been to try and understand the way the wall box communicates with the stepper. In trying to understand the two units i may have questions that make no sense in this situation but ive been trying to understand why the 30 vlt power and the ground have continuity, i thought wrongly that this should not be the case. When i read the service manual and info on the wall box unfortunately it is not evident or my lack of knowledge keeps me from finding the answer. My goal was never to waste your time . pete
|
|
|
|
Post by jukeboxmarty on Feb 4, 2024 19:18:32 GMT
Wallbox operation is not rocket science. There are fairly good stepper diagrams that cover the sequence of operation. If you studied these diagrams, you would see what stepper components are energized through which components. You say you don't want to waste our time, but quite frankly unless you are able to grasp some of the theory of operation... that's exactly what's going on! Norman has already stated that "I'm not sure that I can help you much more". That's because for whatever reason you are not understanding the sequence of operation, or our answers. I'm not trying to attack you personally, but look back at this thread! Three pages of information and it seems like we've gotten nowhere! I think we are done here.  |
|
|
|
Post by prime on Feb 4, 2024 20:39:27 GMT
I disagree with your statement that i am not grasping what Norman has stated, through his knowledge i have confirmed that the selections were making it to the rivets on the selector plate, I get grounding as per selections on all of them, I tested A1 to V0, I used both an analog and the light tester Ron helped me make. I can hear the pulses on the arm while it passes the letter and number rivets. On the Letter I realize V is first. on the numbers 1 is first , i get the exact number of pulses i should for the letter and number pressed, then when i count the pulses on the stepper they are either one number or one letter short, or sometimes exact letter but two pulses on number. I agree this has gone as far as it can but not because i don't understand what i've being told. Thankyou for all of your help with this. pete
|
|
|
|
Post by prime on Feb 7, 2024 22:29:50 GMT
I know this post has run its course, just want to update in case this happens to someone else, I decided to replace the 5mfd 300 vlt cap even though the VG app seemed to work. After removing cap and ordering one from VG ,i decided to strip the wires that were connected to it to prepare for new cap, the wires are solid core, one of the wires that is a black and white swirl had an issue, when stripping about 3/8ths of an inch small pieces of wires fell off and i had to strip back just over an inch to get solid wire, im sure this is why i kept getting different results with each selection. In hindsight I should have replaced it when receiver was recapped but didn't know at that time it was a cap.
|
|
