Difference between revisions of "Williams System 9 - 11"
| Line 84: | Line 84: | ||
3J5 pin 4 = +100 volts DC <br><br> | 3J5 pin 4 = +100 volts DC <br><br> | ||
If the test points are more than about 5 volts out of spec, then your HV section may | If the test points are more than about 5 volts out of spec, then your HV section may | ||
| − | be malfunctioning. Check the table below for a solution.<br><br><b>Troubleshooting table</b> | + | be malfunctioning. Unless you or a previous owner replaced Z2/Z4 with 1N4763A diodes to purposely reduce the display voltage.<br><br> |
| + | |||
| + | Check the table below for a solution.<br><br><b>Troubleshooting table</b> | ||
{| border=1 | {| border=1 | ||
| <b>Symptom</b> | | <b>Symptom</b> | ||
| Line 127: | Line 129: | ||
| Display Glass* | | Display Glass* | ||
|- | |- | ||
| − | | Shorted | + | | Shorted UDN7180 |
| UDN7180* | | UDN7180* | ||
|- | |- | ||
| Line 146: | Line 148: | ||
a new or rebuilt power supply to the display board, as a shorted display or chip can damage a good power | a new or rebuilt power supply to the display board, as a shorted display or chip can damage a good power | ||
supply. Remove the display board from the system. The display characters are driven by the two types | supply. Remove the display board from the system. The display characters are driven by the two types | ||
| − | of UDN chips, the | + | of UDN chips, the UDN7180 & UDN6118 (or UDN6184). Locate these chips (there are several) |
on the board and test them with your DMM set to diode check. Clip your + (RED) | on the board and test them with your DMM set to diode check. Clip your + (RED) | ||
lead to the ground trace of the board. Probe the UDN chips as shown in the diagram. | lead to the ground trace of the board. Probe the UDN chips as shown in the diagram. | ||
| Line 156: | Line 158: | ||
chip should carefully be desoldered and removed from the board. Take care to preserve this chip, | chip should carefully be desoldered and removed from the board. Take care to preserve this chip, | ||
as they are nearly impossible to find and expensive to replace. Now install an IC socket in its place. | as they are nearly impossible to find and expensive to replace. Now install an IC socket in its place. | ||
| − | Repeat the test with no chip installed. If the short is gone, then the | + | Repeat the test with no chip installed. If the short is gone, then the UDN chip needs to be replaced. |
If the short remains, then the display glass needs to be replaced. | If the short remains, then the display glass needs to be replaced. | ||
<br><br><b>Displays Test With no Shorts</b><br>Once the displays are tested and shorts are eliminated, we can proceed with the HV section repair. | <br><br><b>Displays Test With no Shorts</b><br>Once the displays are tested and shorts are eliminated, we can proceed with the HV section repair. | ||
Revision as of 06:56, 30 May 2011
 |
1 Introduction
Put system info here
2 Games
2.1 System 9
- Space Shuttle
- Sorcerer
- Comet
2.2 System 11
- Grand Lizard
- High Speed
- Road Kings
- Gold Mine (Shuffle Alley)
2.3 System 11a
- Pinbot
- Millionaire
- F-14 Tomcat
- Fire!
- Fire! Champagne Edition
2.4 System 11b
- Big Guns
- Space Station
- Cyclone
- Banzai Run
- Swords of Fury
- Taxi
- Jokerz!
- Earthshaker
- Black Knight 2000
- Police Force
- Elvira and the Party Monsters
- Bad Cats
- Mousin' Around!
- Whirlwind
2.5 System 11c
- The Bally Game Show
- Pool Sharks
- Rollergames
- Diner
- Radical!
- Dr. Dude
- Riverboat Gambler
- Bugs Bunny's Birthday Ball
3 Technical Info
4 Problems and Solutions
4.1 Power Problems
Replacement power supply If using the Rottendog WDP011A power supply for Williams Cyclone or Big Guns, you may have to move the +12v jumper from the bottom jump to the top. If your machine has GI but doesn't boot (only the 5v light on the CPU is lit) and is one of these two games, that is the most likely reason.
4.2 MPU boot issues
4.2.1 Relocating the battery from the MPU board
4.2.2 Repairing Alkaline Corrosion
4.2.3 Connecting a logic probe to the MPU
4.2.4 Using a PC Power Supply For Bench Testing
4.3 Game resets
4.4 Solenoid problems
4.5 Lamp problems
4.6 Switch problems
4.7 Display problems
System 9/11 High Voltage Section Repair
WARNING: This circuit uses high voltages. Don't continue, unless you are confident in your diagnostic abilities.
Check Voltages
If all displays are blank, your high voltage (HV) section may not be working.
On the Power Supply Board, use a DMM set to DC volts with the - lead grounded, probe the following connector
pins to determine if the HV section needs repair. If the display fuse, F1 is blowing,
you should remove the applicable display connector (with power off) before testing the voltages.
If you have Power Supply D-11883 or D-12246:
3J2 pin 1 = -100 volts DC
3J2 pin 3 = +100 volts DC
If you have Power Supply D-8345-xxx:
3J5 pin 3 = -100 volts DC
3J5 pin 4 = +100 volts DC
If the test points are more than about 5 volts out of spec, then your HV section may
be malfunctioning. Unless you or a previous owner replaced Z2/Z4 with 1N4763A diodes to purposely reduce the display voltage.
Check the table below for a solution.
Troubleshooting table
| Symptom | Possible Cause | Replacement |
| 0V ON BOTH +100/-100 lines | Check F1 | 1/4 Amp SB |
| 0V on +100V line | Open Diode D3 | 1N4004 |
| Open Q2 | 2N5401 | |
| Shorted Zeners | 1N4730A and 1N4763A | |
| Open Q1 | MJE340 | |
| 0V on -100V line | Open Diode D4 | 1N4004 |
| Open Q4 | 2N5551 | |
| Shorted Zeners | 1N4730A and 1N4763A | |
| Open Q3 | MJE350 | |
| F1 1/4 Amp Fuse Blows | Bad Capacitor at C1 and C3 | 100uF,150V |
| Shorted Display | Display Glass* | |
| Shorted UDN7180 | UDN7180* | |
| Shorted UDN6118 | UDN6118* | |
| +118V on +100V line | Shorted Q1 | MJE340 |
| -118V on -100V line | Shorted Q2 | MJE350 |
| * located on display board | ||
Display Fuse F1 Blows
Testing the UDN Chips
If the display fuse is blowing, you should check the display board for shorts before connecting
a new or rebuilt power supply to the display board, as a shorted display or chip can damage a good power
supply. Remove the display board from the system. The display characters are driven by the two types
of UDN chips, the UDN7180 & UDN6118 (or UDN6184). Locate these chips (there are several)
on the board and test them with your DMM set to diode check. Clip your + (RED)
lead to the ground trace of the board. Probe the UDN chips as shown in the diagram.
If any shorts are read in the tested pins, the display should not be connected to the power
supply until the shorts are corrected.
Shorts Are Found in UDN Chip Test
If a short reading is found in the tested pins (don't test the pins labeled 'dont care'), the UDN
chip should carefully be desoldered and removed from the board. Take care to preserve this chip,
as they are nearly impossible to find and expensive to replace. Now install an IC socket in its place.
Repeat the test with no chip installed. If the short is gone, then the UDN chip needs to be replaced.
If the short remains, then the display glass needs to be replaced.
Displays Test With no Shorts
Once the displays are tested and shorts are eliminated, we can proceed with the HV section repair.
Replacing the components in the HV Section
Since there are not that many components, if you are having problems isolating the
fault, a quick solution is to replace all the components in
the HV section. If only one side (+ or -) is failing, it is possible to rebuild only the failing side.
Check the parts section of the wiki to find suppliers, and get the replacement parts for one or both failing sides:
| Part | +Side Part | -Side Part | +,-Location |
| Transistor | MJE340 | MJE350 | Q1,Q3 |
| Transistor | 2N5401 | 2N5551 | Q2,Q4 |
| Zener diode | 1N4730A | 1N4730A | Z1,Z3 |
| Zener diode | 1N4763A** | 1N4763A** | Z2,Z4 |
| Resistor | 39k Ohm,1W | 39k Ohm,1W | R1,R4 |
| Resistor | 680 Ohm,1/4W | 680 Ohm,1/4W | R2,R5 |
| Resistor | 330k Ohm,1/2W | 330k Ohm,1/2W | R3,R6 |
| Capacitor | 0.1uF,250V metal polyester | 0.1uF,250V metal polyester | C2,C4 |
| Capacitor | 100uF,150V | 100uF,150V | C1,C3 |
| **This is a 91V Zener to reduce the voltage to prolong display life | |||
Remove and replace HV components
- Clip the old components from the board (make sure you have new ones first).
- Use one of the desoldering methods to remove solder from the holes.
- Stuff board with new components.
- Check for correct orientation on transistors, diodes and the large capacitor if you replace it.
- Leave a little space under components for air flow.
- Bend leads on components so they won't fall out when board is inverted for soldering.
- Double check that all the correct parts are in the correct places and properly oriented.
- Solder the parts to the board
- Clip excess off leads
NOTE ON INSTALLATION OF THE MJE340/MJE350 TRANSISTOR
The MJE340/MJE350 is the heat-sinked transistor. On most Williams boards, this transistor pin configuration is not the same as the original part. It will need to be installed vertically with heat sink attached to the transistor only. The transistor will sit at about a 45 degree angle so the legs can be lined up to fit in the correct holes. Check your board and insure correct orientation before soldering in place.
Ready to test
To test the rebuilt power supply, return to the "Check Voltages" section of this guide.
4.8 Sound problems
System 11 games are known to have some amount of hum. An easy thing to test is to make sure all boards are secured tightly with all screws. This will insure the boards have a proper ground.
Another cause of hum could by an inconsistent +5 volts from the power driver board. An indicator of this being the cause of your hum would be the game occasionally resetting as well. Replacing caps C8 and C10 on the power board may fix this issue.
4.9 Flipper problems
4.10 Pop bumper problems
5 Repair Logs
Did you do a repair? Log it here as a possible solution for others.