[Techtoolslist] WTB 9010 fluorescent display

[John Robertson]

Danny Pearson wrote:

> Hi John, yeah that was my first thought.   Unfortunately it's not them

> (6118's), I swapped a couple around and the issue with the first 2 chars is

> still there.   I even jumpered between a working char and a non working

> char, nothing.  Jumpering from Char 1 to a free character works fine (I can

> see the 'F') so it's definitely the Fluorescent display that has the issue.

>

> Cheers,

>

> Dan

>   


If the display is dim you may be able to use a trick I found that works 
on Gottlieb (pinball) displays - namely you overvolt the filaments a bit 
to drive off impurities and the display may brighten up for a reasonable 
period of time (or it may die, depends...).

With the Gottlieb displays the filaments are the first and last pins on 
the glass tube and I drive them to 12V - so they glow dimly red - and 
leave it there for just a couple of seconds.

For the 9010 you will need to find out the filament voltage then using a 
variable supply run up the filaments until you see them glow, then try 
powering up the display to see if there is an improvement. Naturally the 
display module is unplugged from the 9010 during this process!

Note there is a risk of destroying the display so this is a last-resort 
operation.

John :-#)#

> -----Original Message-----

> From: techtoolslist-bounces at flippers.com

> [mailto:techtoolslist-bounces at flippers.com] On Behalf Of John Robertson

> Sent: 14 June 2010 20:11

> To: Technical Tools Mail List

> Subject: Re: [Techtoolslist] WTB 9010 fluorescent display

>

> Danny Pearson wrote:

>   

>> Hi guys, I've got a 9010 with a couple of bad characters (the first two)

>>     

> in

>   

>> the fluorescent display.    Long shot I know but does anyone have a spare

>> working display FS?  

>>

>>  

>>

>> Cheers,

>>

>>  

>>

>> DanP

>>   

>>     

> I should have a used spare display assembly that I can test and sell...

>

> Is it the display or one of the driver ICs for the display that is at 

> fault? There is a display test in the TTL files - buried within the 9010 

> manual, that you can program in and run to have an idea of where the 

> problem may lay.

>

> John :-#)#

>

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