Midway Nba Showtime Gold Edition Nba On Nbc Operation Manual

Wiring          5-13
SOUND I/O BOARD LED INDICATOR STATUS TABLE
LED Location Function Color State Meaning
Off --
On --LED1
(Note 1)Near U11 Not Used
(Remains Off)Green
Blinking --
Off Not in Use (No Game Linking)
LED2
(Note 2)Near U34 & Crystal
Y1Linking Connector
StatusGreen
On Link Continuity Good
Off* No Power
LED3
(Note 2)Near the JAMMA
Connector-5V Power Indicator Red
On* Normal Operation
Off No PowerLED4
(Note 2)Near U35 &
Connector P14+12V Power
IndicatorRed
On Normal Operation
Off No PowerLED5...

Wiring          5-14
VIDEO BOARD INDICATOR AND JUMPER LOCATIONS
Note
This video board has no jumpers or LEDs 

Troubleshooting          6-1

	


	





	

	


C H A P T E R
S I X
TROUBLESHOOTING
NOTICE: 
The term VGM refers to the video game machine.
CAUTION: 
This VGM uses complex electronic components that are very sensitive to
static electricity. Observe the following precautions before handling VGM electronics.
Failure to do so may void your warranty and could damage electronic assemblies.
•
  Before servicing electronics, turn off AC power to the VGM. W ait for...

Troubleshooting          6-2
Coin Mechanism and Pricing Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Improper settings at
Pricing MenuFrom Coin Options Menu, choose PRICING
OPTIONS MENU. Verify that units and credits
are set correctly.
Incorrect pulse width
on bill validators1.  Consult bill validator manufacturer’s literature.
Adjust pulse width on validator to long setting.
2.  Retest validator operation.
Faulty wiring1.  Check that cabinet wiring is correct for this VGM.
2.  Assure that coin...

Troubleshooting          6-3
VGM Startup Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Power problem1.  Check that VGM power switch is on.2. Inspect electronics to see if fans are turning. If
not: Is power supply connected to its power
cable? Is power supply turned on?
3.  Plug VGM into AC power outlet. Verify presence
of AC line voltage.
Improper line voltage
switch settingTurn off VGM power. Unplug AC line cord. Check
line voltage switch. If necessary, set it to agree
with local AC line voltage....

Troubleshooting          6-4
VGM Startup Troubleshooting Table, continued
SYMPTOM CAUSE REQUIRED ACTION
Power problem1.  Inspect circuit boards under low-light conditions.
LEDs glow if processor circuits receive voltage.
Fan should be turning. These indications prove
presence of DC from power supply. Still,
voltages or signals may not be normal.
2.  Turn on VGM power. Using 20-volt DC setting on
digital voltmeter, measure DC voltages at power
connector pins.
3.  Using 2-volt AC setting on digital...

Troubleshooting          6-5
VGM Startup Troubleshooting Table, continued
SYMPTOM CAUSE REQUIRED ACTION
Faulty coin
mechanism1.  Unlock and open coin door. Check each
currency acceptor to assure proper mounting.
Verify that each release latch is closed and
locked. Does mechanism accept and reject
currency correctly? Test mechanism with good
and bad coins.
2.  Inspect to see if external acceptor indicators
(Pricing, Flashing Arrows, etc.) are lit.
3.  Verify that each acceptor operates properly by
placing...

Troubleshooting          6-6
Audio Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Improper volume
setting1.  From Main Menu, choose VOLUME LEVEL.
Check that Attract Music is on (enabled). Verify
that all volume levels are set well above zero.
2.  If necessary, change levels to make VGM
audible.• No audio
•  Video is present
• VGM (video game machine)
appears to operate normallyFaulty SIO Board1.  From Main Menu, enter Diagnostics Menu.
Select SOUND SUBSYSTEM TEST. Test
checks entire sound system.
2....

Troubleshooting          6-7
Joystick Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Faulty switchEnter game Menu System by pressing and
holding TEST MODE switch inside coin door.
From Diagnostics Menu, choose SW ITCH TEST.
Operate joystick in question. Check for proper
readings of up, down, left and right.
Faulty switch wiring1.  Check for wires caught in door hinges, latches or
switch contacts.
2.  Verify that harness connectors are attached and
fully seated.
3.  Assure that joystick switches...

Troubleshooting          6-8
Video Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Power problemVerify connection of AC Power to video monitor.
Inspect CRT neck in dim light. Glowing filament
near CRT base proves that some monitor
circuits receive power. Still, voltages or signals
may not be normal.
Faulty wiring1.  Turn off VGM power. Verify that video signal and
Remote Adjustment Board connectors seat
properly on Video Monitor Board.
2.  Assure that video cables connect to circuit
boards.
3....