Midway Gauntlet Dark Legacy 39in Service Manual

52Midway Games West Inc.
Chapter 5 Wiring
VEGAS CPU BOARD ASSEMBLY JUMPER POSITION CHART
Note 1:  Set both jumpers J1 and J3 to EPROM or Flash ROM mode to use such devices.
Note 2: These jumpers are independent
Note 3: This jumper is independent of the CPU boot ROM size selected
VEGAS CPU BOARD ASSY LED INDICATOR STATUS CHART
Note 1 LED1 monitors CPU power (+3.3 Volts). If this LED is off or blinking, investigate processor circuits. If 
other LEDs are off or blinking at the same time, check the +5 Volt...

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Chapter 5 Wiring
VEGAS SOUND I/O ASSEMBLY
VEGAS SOUND I/O BOARD ASSY JUMPER POSITION CHART
Note 1 Set Gun 1 (P2) I/O port by setting both J1 and J8 jumpers to input or output mode.
Note 2 Set Gun 2 (P4) I/O port by setting both J3 and J5 jumpers to input or output mode.
Designation Location Function Meaning Position State
J1 (Note 1) Near U9 &  Gun 1 I/0  Input Mode Pins 1 & 2 X
Crystal Y3 Connector P2 Output Mode Pins 2 & 3
J2 Between U35 and U10 Video Sync Positive Sync Jumper...

54Midway Games West Inc.
Chapter 5 Wiring
VEGAS SOUND I/O BOARD ASSEMBLY LED INDICATOR STATUS CHART
Designation Location Function Color State Meaning
LED1 Near U11 SIO Board Green Off No boot ROM
Activity On SIO Board locked up
Blinking Power Fault
LED2 Near U34  Linking Green Off Not in use (no game linking)
Crystal Y1 Connector Status On Normal Linked Operation
Blinking Link Fault
LED3 Near the Jamma -5V Power Red Off No power
Connector indicator On Normal operation
Blinking Power fault
LED4 Near U35 &...

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Chapter 5 Wiring
VEGAS SOUND I/O ASSEMBLY DIP-SWITCH SETTINGS
Service technicians may change DIP-switches with AC power on. “*” indicates factory defaults.
DC POWER SOURCE VOLTAGE LIMITS DIP Switch U13
SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8
Display Comments on 
VT100No
Ye sOff*
On
Diagnostic Code Source Hard Disk Drive EPROM Off*
On
Not Used Off*
On
Not Used Off*
On
Not UsedOff*
On
Not UsedOff*
On
Not UsedOff*
On
Not UsedOff*
On
DIP Switch U12SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8
Monitor...

56Midway Games West Inc.
Chapter 5 Wiring
NOTES
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CHAPTER
Gauntlet: Dark Legacy57
Troubleshooting
WARNING: 
Do not remove or install any connector when power is turned on. Doing so will damage 
the CPU Board Assembly or the hard disk drive and void the warranty. 

58Midway Games West Inc.
Chapter 6 Troubleshooting
Game Does Not Start
Symptom Problem Suggested Solution
• Machine appears non-
functional
 No audio
 No IlluminationLack of electricity 1. Check that Power Switch has been turned on
2. Verify that line cord is plugged fully into receptacle and 
into power supply.
3. Try another power outlet.
 No video display Wrong voltage 1. Ensure power supply line voltage switch matches local 
line voltage.
2. Using voltage meter, correctly adjust +5V output on...

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Chapter 6 Troubleshooting
Game cannot be played
Symptom Problem Suggested Solution
Game does not accept 
currency or tokens.
Game does not start.
Audio present
Video presentBlocked coin path. 1. Unlock and open cash door. Empty cash box and inspect 
revenue for counterfeit currency.
2. Remove items that block path from coin mechanism.
3. Ensure proper mounting of each mechanism. Clear cur-
rency path. Reinstall and latch mechanism.
Poor leveling Verify mechanisms are level...

60Midway Games West Inc.
Chapter 6 Troubleshooting
Audio Problems
Symptom Problem Suggested Solution
Audio non-functional.
Video present.
Game operates normally.Volume set too low 1. Press TEST MODE switch to enter Menu System. From 
SELECT TEST menu, choose ADJUST VOLUME. Ver-
ify that attract and game volume levels are not set to zero. 
Change to appropriate levels.
2. Return to previous menu and choose SOUND TESTS. 
Verify operation of each speaker.
Faulty hardware Turn off AC power. Remove grills...

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Chapter 6 Troubleshooting
Video Problems
Symptom Problem Suggested Solution
Monitor appears non-
functional.
Audio present
Controls operate nor-
mally.Poor signal 1. Verify AC power is connected to video monitor.
2. Inspect neck of CRT under low light level conditions. If 
there is voltage in filament circuits, you will see a glow 
near the CRT base. This indicates monitor circuits are 
receiving power, not that voltages or signals are proper.
3. Turn AC power off. Verify video...