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#1
Mirrors hitting stoppers on start up.
Posted on: 2018/12/29 13:22
Newbie
Joined 2018/12/29
6 Posts
Hi,

I have a problem with my VB. When it fires up one of the mirrors (LEFT) vibrates and hits the stopper making a noise. The other (RIGHT) seems fine.

I have dismantled the VB partially and blasted some compresses air through the optical sensor and checked for any physical obstructions (both suggested elsewhere).

If I disconnect the side with the problem (LEFT) the problem switches to the other side.

Interestingly if I switch the Left and Right ribbon cables the problem remains on the one on the left indicating the problem is probably not with the mirror / optical sensor / solenoid set up and more likely to be on the main board???

All the caps etc looks to be in good shape.

I do not have an other one to test with :(

Any help appreciated.

Joe
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#2
Re: Mirrors hitting stoppers on start up.
Posted on: 2018/12/31 20:02
PVB Elite
Joined 2003/7/26
USA
1458 Posts
PVBCC EntryCoderContributorSpecial AchievementTop10 PosterHOTY09 EntryLong Time User (15 Years) App Coder20+ Game RatingsPVBCC 2013 Entry
Hi, arkleyjoe.

Just to be clear, when you talk about "disconnecting" things, you're talking about the mirror galvanometers, and not the LED display cables, right? The two systems are independently controlled by the VIP.

If the problem isn't in the servo board itself (that smaller board in the "nose" of the VB, perpendicular to the mainboard), it might be that you didn't quite get the sensor clean, the sensor's faulty, or there's a damaged wire between the sensor and the servo board.

The servo boards have been known to go bad. It might be bad caps, but I've never investigated it. I might have a replacement board for you, later, but I'm in the middle of a move right now.

Keep us updated on the situation!

Quote:

arkleyjoe wrote:
Hi,

I have a problem with my VB. When it fires up one of the mirrors (LEFT) vibrates and hits the stopper making a noise. The other (RIGHT) seems fine.

I have dismantled the VB partially and blasted some compresses air through the optical sensor and checked for any physical obstructions (both suggested elsewhere).

If I disconnect the side with the problem (LEFT) the problem switches to the other side.

Interestingly if I switch the Left and Right ribbon cables the problem remains on the one on the left indicating the problem is probably not with the mirror / optical sensor / solenoid set up and more likely to be on the main board???

All the caps etc looks to be in good shape.

I do not have an other one to test with :(

Any help appreciated.

Joe
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#3
Re: Mirrors hitting stoppers on start up.
Posted on: 1/2 18:43
Newbie
Joined 2018/12/29
6 Posts
Hey RunnerPack,

Thanks for replying, much appreciated.

Quote:

Just to be clear, when you talk about "disconnecting" things, you're talking about the mirror galvanometers, and not the LED display cables, right? The two systems are independently controlled by the VIP.


Correct I am referring to the connectors going to the smaller board in the nose of the VB not the ribbons going to the displays.

I will open it up and give it another clean, and recap the board they are connected to and let you know how I get on.

If that does not work out and you have a spare board that would be hugely appreciated!
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#4
Re: Mirrors hitting stoppers on start up.
Posted on: 3/2 12:24
Newbie
Joined 2018/12/29
6 Posts
Hi @RunnerPack,

After all this time I eventually acquired a known good mirror assembly from Japan. With this connected in has exactly the same problem where one mirror does not stabilise.

I will replace the caps and check connectivity as my next step but my gut is telling me something more serious is wrong with the servo board.

If you do have one for sale by any chance I would appreciate it.

Joe
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#5
Re: Mirrors hitting stoppers on start up.
Posted on: 3/4 22:27
Newbie
Joined 2018/12/29
6 Posts
Hi @RunnerPack,

I have checked out the continuity etc and so my conclusion is that the servo board has a problem.

If you have a spare one you could sell me please let me know?

Joe
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