Gottlieb "Countdown" machine (SS) need help!!!!

Du24pont24

Inserted Coin
I have a Gotlieb "countdown" machine that has a trop target bank that will not pop up!

I am new to repairs, so I don't know anything. I was told that with a solid state machine, you can read codes on how to fix???? If so, how do I do it???? Thanks so much for any help!

Derek
Indiana, USA
 
Solution
the problem might be as simple as a blown fuse. usually with gottlieb each of the bank reset coils is protected by its own fuse. each fuse holder is mounted under playfield near each of the bank reset coils. sometimes the fuse holders are mounted in a row. since countdown uses 5 controlled solenoids, and the driver board has only 3 availible solenoid driver transistors, 2 of the solenoids are controlled by lamp driver transistors and under playfield surface mounted driver transistors. these driver transistors are next to the game over and tilt relays. these 2 driver transistors are used for the yellow and blue drop target bank resets.

faralos

Faralos
you got one of the gottleibs good luck finding a manual for it
as Gottleib is being assholes and they took all their manuals offline
http://www.ipdb.org/search.pl?any=countdown&search=Search+Database&searchtype=quick#573
but check the contacts first on the underside of the play field
clean them with an emery board or business card between the contacts
check for bad/loose wiring
http://www.pinrepair.com/restore/index2.htm
if you ask one of these owners they may be able to help you with a copy of a manual
http://www.pinballowners.com/owners/573
damn drops. okay check the diode going across the solenoid also
and check the solenoid itself for voltage
make sure all wires have solid connections on the solenoid rig
these pics are from a flash (williams)but the drops all work the same
 

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Itchigo

Former Operator
Site Supporters
I'm guessing that if the targets won't come back up it'd be something like a contact not making contact, or reset coil being bad, or broken wire. I'd look there first before I even looked at diagnostics. As a former operator about less than 1% of the time did I even need a manual. The other 99% it was a fix shown above. (Coil, switch, wire, etc).
 

faralos

Faralos
manuals are for wimps!
I once applied at a chuck e cheese for a tech job
had to take a test failed horribly for I could not name a pic of a bridge rectifier
but I showed him that I can fix most anything
unfortunately that is not what they want they wanted a person who knew the names of the parts.
why? if I can find and fix the problem
cause they're assholes...:)
 

faralos

Faralos
When used in its most common application, for conversion of an alternating current (AC) input into a direct current (DC) output,<sup id="cite_ref-1" class="reference">[1]</sup> it is known as a bridge rectifier.
all coinop video games have it somewhere on the boards
Now I know what they look like!
 

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pinballdaveh

Pinball Technician
Staff member
Site Supporters
the problem might be as simple as a blown fuse. usually with gottlieb each of the bank reset coils is protected by its own fuse. each fuse holder is mounted under playfield near each of the bank reset coils. sometimes the fuse holders are mounted in a row. since countdown uses 5 controlled solenoids, and the driver board has only 3 availible solenoid driver transistors, 2 of the solenoids are controlled by lamp driver transistors and under playfield surface mounted driver transistors. these driver transistors are next to the game over and tilt relays. these 2 driver transistors are used for the yellow and blue drop target bank resets.
 
Solution

pinballdaveh

Pinball Technician
Staff member
Site Supporters
drop target bank reset fusing

usually slo-blo or time delay fuses are used to protect coils. bussman MDL are one of the most common types of slo-blo fuses. usually 1 or 2 amp is used for the bank reset coils, next to the fuse holder there should be a paper telling you what amp size you need. since 1 or 2 amp is not a real common size , auto stores might not have them. PBR or marco should have them, or if you have a electrical parts supplier in your area. they are sometimes sold in packs of 5 fuses
 

electronerd122

Pinball Nudger
When used in its most common application, for conversion of an alternating current (AC) input into a direct current (DC) output,<sup id="cite_ref-1" class="reference">[1]</sup> it is known as a bridge rectifier.
all coinop video games have it somewhere on the boards
Now I know what they look like!

Hey guys, I know it’s not exactly what this thread is about but it looks that some of you may be able to help me here. Thing is, I started learning the ropes of electronics just a few weeks ago and my question may sound stupid for a pro like you, but I’m still going to test my luck. Here’s the deal. I’ve been trying to figure out the difference between a bridge rectifier and a rheostat. I read a bunch of posts about it but I’d really appreciate it if somebody could explain that to me like I’m 5. The best resource that I found on the topic is this article with a video about bridge rectifiers https://www.derf.com/how-a-bridge-rectifier-works-step-by-step-tutorial/ , but it’s still a bit too hard to understand for me :) What’s the biggest conceptual difference between the two (a bridge rectifier and a rheostat)? Thanks
 

Ike Savage

Froggy like robot
Staff member
Site Supporters
Hey guys, I know it’s not exactly what this thread is about but it looks that some of you may be able to help me here. Thing is, I started learning the ropes of electronics just a few weeks ago and my question may sound stupid for a pro like you, but I’m still going to test my luck. Here’s the deal. I’ve been trying to figure out the difference between a bridge rectifier and a rheostat. I read a bunch of posts about it but I’d really appreciate it if somebody could explain that to me like I’m 5. The best resource that I found on the topic is this article with a video about bridge rectifiers https://www.derf.com/how-a-bridge-rectifier-works-step-by-step-tutorial/ , but it’s still a bit too hard to understand for me :) What’s the biggest conceptual difference between the two (a bridge rectifier and a rheostat)? Thanks
@pinballdaveh
 

pinballdaveh

Pinball Technician
Staff member
Site Supporters
A bridge rectifier is a device consisting of 4 diodes connected in a square. When properly configured an AC voltage is applied to 2 corners and the other 2 corners DC will come out.
Basically used to change AC to DC.
A rheostat is a device similar to a potentiometer or pot for short. A potentiometer will have 3 connections, 2 for the full resistance and 1 for the insulated wiper finger.
The rheostat will only have 2 connections. 1 for one side of the resistance, and the other connection to the insulated wiper finger.
Rheostats are usually used to add a variable resistance to a circuit to decrease somethings strength.
 
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