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SOUND I/O BOARD LED INDICATOR STATUS TABLE
LED
Location
Function
Color
LED1
(Note 1)
Near U11
Not Used
(Remains Off)
Green
LED2
(Note 2)
Near U34 & Crystal
Y1
Linking Connector
Status
Green
LED3
(Note 2)
LED4
(Note 2)
LED5
(Note 2)
Near the JAMMA
Connector
Near U35 &
Connector P14
Near Connector
P23
Near U34 & Crystal
Y1
-5V Power Indicator
Red
+12V Power
Indicator
+5V Power Indicator
Red
CPU Linking Activity
Red
Near U34 & Crystal
Y1
Linking Transmitting
Data
Red
Near U14 & Crystal
Y1
Audio Activity
Yellow
Near U34 & Crystal
Y1
Near U44 & Crystal
Y2
Linking Receiving
Data
Yellow
LED6
(Note 2)
LED7
(Note 2)
LED8
(Note 1)
LED9
(Note 2)
LED10
(Note 1)
LED11
(Note 1)
LED12
(Note 1)
LED13
(Note 1)
Near U44 & Crystal
Y2
Near U44 & Crystal
Y2
Near U44 & Crystal
Y2
Red
Green
Not Used
(Remains On)
Red
Not Used
(Remains On)
Yellow
Not Used
(Remains On)
Yellow
Not Used
(Remains On)
State
Off
On
Blinking
Off
Meaning
---Not in Use (No Game Linking)
On
Link Continuity Good
Off*
No Power
On*
Normal Operation
Off
On
Off
On
Off
On
No Power
Normal Operation
No Power
Normal Operation
Not in Use
CPU Communicating with
Ethernet Controller
Not in Use (No Game Linking)
Sending Data
Normal Operation
No Sound Boot ROM
Locked Up
Normal Operation
Not in Use (No Game Linking)
Receiving Data
-------------
Off
On
Blinking
Off
On
Blinking
Off
On
Off
On
Blinking
Off
On
Blinking
Off
On
Blinking
Off
On
Blinking
Notes
1. Software controls this LED. Indications are game and revision-specific. Changing the EPROMs on this board
may alter the function of this LED. Firmware damage may also cause new or different LED behavior.
2. Hardware controls this LED. Indications depend on hard-wired circuitry. A change in normal LED behavior may
indicate a circuit fault. Changing the EPROMs on this board shouldn’t alter the function of this LED.
Wiring
5-13