Midway Skins Game Conversion Kit Operations Service Manual

							System - 14 Midway Games West Inc. STANDARD PRICING TABLE, continued
NAME START CONTINUE CREDITS/COIN COIN 1 COIN 2 COIN 3 COIN4 BILLUK ECA 1 1 1 1/50p, 3/£1.00 £1.00 50p 20p 10p £2.00UK ECA 2 1 1 1/50p, 2/£1.00 £1.00 50p 20p 10p £2.00UK ECA 3 1 1 1/30p, 2/50p, 5/£1.00 £1.00 50p 20p 10p £2.00UK 4 1 1 1/50p, 3/£1.00 £1.00 50pUK 5 1 1 1/50p, 2/£1.00 £1.00 50pUK ECA 6 1 1 1/30p, 2/50p, 4/£1.00 £1.00 50p 20p 10p £2.00UK ECA 7 1 1 3/£1.00 £1.00 50p 20p 10p £2.00UK ECA 8 1 1 1/50p, 2/£1.00, 4/£2.00 £1.00 50p 20p 10p £2.00USA1 2 2 1/25¢ 25¢ 25¢ $1.00USA2 2 1 1/25¢ 25¢ 25¢ $1.00USA3 1 1 1/25¢ 25¢ 25¢ $1.00USA4 1 1 1/50¢, 3/$1.00 25¢ 25¢ $1.00USA5 2 1 1/50¢, 4/$1.00 25¢ 25¢ $1.00USA6 1 1 1/50¢ 25¢ 25¢ $1.00USA7 1 1 1/50¢, 3/$1.00 25¢ 25¢ $1.00USA8 2 2 1/50¢, 4/$1.00 25¢ 25¢ $1.00USA9 3 2 1/25¢, 4/$1.00 25¢ 25¢ $1.00USA10 3 3 1/25¢, 4/$1.00 25¢ 25¢ $1.00USA11 4 2 1/25¢, 4/$1.00 25¢ 25¢ $1.00USA12 4 3 1/25¢, 4/$1.00 25¢ 25¢ $1.00USA13 4 4 1/25¢, 4/$1.00 25¢ 25¢ $1.00USA ECA 3 3 1/25¢, 4/$1.00 $1.00 25¢ 10¢ 05¢ $1.00 
						

							CHAPTER


WIRING
NOTICE: This manual is subject to change without notice. Midway Games W est Inc. reserves
the right to make improvements in equipment function, design, or components as progress in
engineering or manufacturing methods may warrant. 
						

							Wiring - 2Midway Games West Inc.
CABINET WIRING DIAGRAM 
						

							Skins Game Conversion Kit Wiring - 3
CABINET WIRING DIAGRAM 
						

							Wiring - 4Midway Games West Inc.
POWER WIRING DIAGRAM 
						

							Skins Game Conversion Kit Wiring - 5
LED INFORMATION
On power-up, the seven segment LED display (LED2) counts from 0 to 6 twice, and then up to
f (hexidecimal) as it initializes the board and loads the game software.  When the first title
screen appears, the LEDs darkens, and are not used during normal game play.
The red LEDs marked “CPU Power” and “Power” should be lit whenever AC power is on.
The red LEDs “RST0,” “RST1,” and “RST2” behave as follows:
RST2 RST1 RST0 Meaning
ON ON ON Normal after AC power is on
ON ON OFF SnapHat watchdog reset occurred
ON OFF ON Expansion connector reset (This is not normal.)
ON OFF OFF Onboard reset button pressed
OFF ON ON Software issued a reset
JUMPER INFORMATION
Jumpers located around the CPU Board Assembly perform as follows:
Jumper 1-2 2-3 Meaning
J1 X Normal 27C040 (512K x 8) boot EPROM
J1 X 27C080 (1024K x 8)
J2 X Not installed (development use only)
J3 X 27C040 (512K x 8)
J3 X Normal 27C080 (1024K x 8) expansion (update) EPROM
J4 X Not installed (not used)
J5 X Not installed (RS485 termination)
J6 X Normal
DIP SWITCH INFORMATION
There are two banks of DIP switches on the CPU Board Assembly: U49 and U50. The following table
describes the significance of the first two of the eight switches on the U50 DIP switch bank. The
remaining six switches on U50 should be off. All eight switches on U49 should be off.
Switch 1 Switch 2 Meaning
OFF OFF Normal boot and run game or boot and run tournament update
OFF ON Boot EPROM based self test
ON OFF Boot on-disk based self test
ON ON Boot and run factory tests (labview) then run EPROM self test 
						

							Wiring - 6Midway Games West Inc.
LOCATION OF LEDS, JUMPERS, DIP SWITCHES ON CPU BOARD ASSEMBLY
J6
J5J4J3 J2J1
PIC
CHIP 
						

							CHAPTER


TROUBLESHOOTING
CAUTION: 
Turn AC power off before attempting any of the following procedures,
unless otherwise specified. Failure to do so may damage equipment, cause personal
injury, or void warranty. 
						

							Troubleshooting - 2 Midway Games West Inc.
Machine Does Not Start
Symptom Problem Suggested Solution
•
 Machine appears
non-functional.
•
 Audio non-functional
•
 Fan non-functional
•
  No video displayLack of electricity Check that power switch is on and line cord is plugged
into grounded AC outlet.
Poor AC
connection1.  Test line cord, power plug and IEC receptacle for
breaks or damage. Verify continuity of each wire.
2.  Fully seat IEC connector into cabinet receptacle.
3.  Verify wiring harness connectors are fully seated in
the corresponding power supply receptacles.
4.  Verify AC wire connections at power supply
terminals.
Broken fuse Replace broken fuse with identical type.
Faulty AC line filter 1.  Check line filter with ohmmeter to verify operation.
2.  Replace line filter if bad.
•
 Machine appears
non-functional.
•
 Fan functionalW rong voltage Using voltage meter, correctly adjust +5V output on
power supply using adjustment knob.
•
 Machine appears
non-functional.
•
 Fluorescent light
functionalPoor DC
connection1.  Fully seat DC cable connectors in power supply.
2.  Check power supply DC fuse. Replace broken fuse
with one with identical current and voltage rating.
Short circuit on
CPU board
assembly3.  Place CPU Board Assembly in known working
machine to verify operation.
4.  Replace faulty assembly with identical one.
•
 Machine appears
non-functional.
•
 Currency acceptor
price indicator is
illuminated.
•
  Power supply fan
functionalPoor connection
across CPU Board
Assembly1.  Inspect CPU Board Assembly under low light
levels. W hen board gets DC power, its LEDs glow,
although voltages or signals may be incorrect.
2.  Turn AC power off. Ensure JAMMA connectors are
fully seated onto mating CPU Board connector.
3.  Turn AC power on. Using 20-volt DC setting on a
digital voltmeter, measure DC voltages at the hard
drive power connector pins. Adjust +5V source if
necessary. Refer to Cabinet W iring Diagram for
wiring information and voltage limits
4.  Using 2-volt AC setting on a digital voltmeter,
measure same DC voltages as above. Any reading
here indicates that supply voltages are unstable
and may contain ripple or noise.
•
 Power-Up Self-Test
runs.
•
  Attract Mode does
not begin.
•
 Audio non-functionalFaulty hard disk
drive1.  Turn AC power on. Press TEST MODE  pushbutton
to access Menu System. From DISK TESTS Menu,
choose DRIVE READ TEST. This indicates
whether hard disk drive mechanism is functional.
2.  Turn AC power off. Unlock and open rear door.
Inspect board assemblies. Check that hard disk
drive ribbon cable connector is fully seated in the
mating connector on the CPU Board Assembly.
Verify that all drive mounting screws are installed. 
						

							Skins GameTroubleshooting - 3 3.  Check that hard disk drive is correct part. A label
with assembly number and software version
appears on each drive.
W rong component
Verify that ROM instruction set and CPU Board set are
correct. Components are marked with manufacturer
name, assembly number and hardware version.
W rong voltage
1.  Turn AC power on. Using 20-volt DC setting on a
digital voltmeter, measure DC voltages present at
power connector pins. Verify +5V source if it is
adjustable. Refer to cabinet W iring Diagram.
2.  Using the 2-volt AC setting on a digital voltmeter,
measure the same DC voltages as above. Any
reading indicates that the supply voltages are
unstable and may contain ripple or noise.
Audio Problems
Symptom Problem Suggested Solution
•
 Video functional
•
 Game functional
•
 Audio non-functionalPoor connection
1.  Press TEST MODE pushbutton to enter Menu
System. Choose ADJUST VOLUME. Ensure Attract
Mode and game volume levels are not at zero.
Adjust levels if necessary to produce sound.
2.  Inspect wiring harnesses and verify connections as
indicated by the Cabinet W iring Diagram.
3.  Using 20-volt DC setting on a digital voltmeter,
measure DC voltages present at power connector
pins. Verify +5V, -5V and +12V sources. Refer to
Cabinet W iring Diagram.
4.  Using 2-volt AC setting on a digital voltmeter,
measure same DC voltages as above. Any reading
here indicates that the supply voltages are unstable
and may contain ripple or noise.
Bad IC
Place CPU Board in known good machine. Repair or
replace if audio is non-functional.
•
 Audio distorted,
muffled, missing
frequencies
•
  Low hum presentFaulty speakers
1.  Press TEST MODE to enter Menu System.
2.  From the Self-Test Menu, choose SOUND TESTS
to verify some audio circuit functions.
3.  Turn AC power OFF. Remove grill and that each
speaker is full range (100 Hz to 10 KHz response)
and rated for at least 10 watts.
Bad wiring
1.  Turn AC power off. Remove grille. Ensure no loose
parts are caught in speaker cones, terminals,
mounting screws, or stuck to magnets.
2.  Ensure wiring is not reversed on a speaker. W eak,
low frequencies and thin or hollow sound quality
suggests incorrectly phased speakers.
3.  Verify wiring against Cabinet W iring Diagram.
Ensure there is a separate wire (not a common
return) for each speaker. Ensure cabinet ground
wires are connected.