Sega Blast City Wiring Guide

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control panel

The pinout is identical to the naomi pinout expect for the 10 pin AMP UP connector.

Blast cp cab pinout.jpg

Using the official Sega extra button loom ( 600-6227-10 ), this is how you wire a kick harness to the cab io's CN8 .

CN8 ( JST NH ) function CPS1 ( JST NH ) CPS2 ( HRS DF1B )
1 P1 light kick 3 19
2 P2 light kick 7 21
3 P1 medium kick 4 17
4 P2 medium kick 8 23
5 P1 strong kick 5 15
6 P2 strong kick 9 9
7 GND 1 34
8 GND 2 35

Cabinet I/O board

This Passive PCB ( Sega part # 839-0894 ) links almost all inputs and outputs together and is a big part of why the Blast City is so versatile.

Blast city cab io.jpg

CONNECTOR FUNCTION SPEC PINOUT
CN1 DC Power INPUT (From PSU 400-5325) Molex MLX
GND GND GND
+12V GND GND
+3.3V +3.3V +3.3V
+5V +5V +3.3V
+5V +5V +5V
CN2 AC Power INPUT (From Door Switch) & OUTPUT Molex MLX
AC(N) AC(N) AC(N) AC(N)Note1
N/C N/C N/C N/C
AC(L) AC(L) AC(L) AC(L)Note2
  • Note1:AC 100V (Neutral) INPUT
  • Note2:AC 100V (Line) INPUT
CN3 DC Power OUTPUT AMP UP
+12V GND GND GND GND GND +5V +5V +3.3V +3.3V
+12V GND GND GND GND GND +5V +5V +3.3V +3.3V
+12V GND GND GND GND GND +5V +5V +3.3V +3.3V
CN4 JAMMA Coin Meter (Pin:8、J) & Coin Chute (Pin:16、T) INPUT JST NH
Coin Meter1
Coin Meter2
Coin Chute1
Coin Chute2
CN5 JAMMA / JVS / Model3 I/O
  • Note3:JAMMA Video (Pin:12、13、14、N、P) INPUT (SPEC:Video Signal = POSTIVE,3.0Vp-p,2kΩ Impedance & SYNC Signal = NEGATIVE,H/V Composite.)
  • Note4:JAMMA Control (Pin:15、R、17~26、U~d) OUTPUT (SPEC:Output Impedance 8Ω.)
  • Note5:JAMMA Sound (Mono,Pin:10、L) INPUT
  • Note6:Line Sound INPUT connect from game board Stereo Sound RCA OUTPUT.
JST RA
V_Green V_Sync N/C SERVICE 2P START 2P UP 2P DOWN 2P LEFT 2P RIGHT 2P SW1 2P SW2 2P SW3 (2P SW4) (2P SW5) Sound(Mono) - Line Sound R + Line Sound R -
V_Red V_Blue V_GND TEST 1P START 1P UP 1P DOWN 1P LEFT 1P RIGHT 1P SW1 1P SW2 1P SW3 (1P SW4) (1P SW5) Sound(Mono) + Line Sound L + Line Sound L -
CN6 General I/O (From game board or I/O board)Note7&8 JST NH
INTPUT Mode OUTPUT ModeRev.A OUTPUT ModeRev.B
BILLBOARD INPUT 0 N/C 1P SW4Note10
BILLBOARD INPUT 1 1P SW6 1P SW5Note10
BILLBOARD INPUT 2 1P SW7 1P SW6
BILLBOARD INPUT 3 1P SW8 1P SW7
BILLBOARD INPUT 4 N/C 2P SW4Note10
BILLBOARD INPUT 5 2P SW6 2P SW5Note10
BILLBOARD INPUT 6 2P SW7 2P SW6
BILLBOARD INPUT 7 2P SW8 2P SW7
GND GND GND
1P BitNote9 1P BitNote9 1P BitNote9
  • Note9:Option function,connector wire to GND to set 7-seg billboard display 1P Score or disconnect for 2P score.
  • Note10:JAMMA Control (Pin:25、26、c、d) not use in this mode.
CN7 vs kit JST RA
CN8 to 10pin amp in panel JST NH
CN9 to coin meter / coin swith JST VH
CN10 to cabinet output harness JST RA
CN11 General I/O (Default connect to billboard connector) JST NH
(CN12) JAMMA Coin Chute 1 (Pin:16) OUTPUT JST NH
Coin Chute 1 GND
(CN13) AC Power OUTPUT AMP UP
AC(N)
N/C
AC(L)

model3 wiring

The 600-6738-20 loom handles i/o and audio/video. you can also use the DB15 connector with regular VGA cable if your monitor has an DB15 input. Note that it is not VGA signal, although the pinout is the same, the model3 outputs in 24khz.

JAMMA Conversion

The 600-6738-21 loom is designed for jamma only. The 600-7143-001 ( see below ) loom can also be used ( set the inline audio selector to "speaker" )

  • -5v is not supplied.
  • disconnect the VGA source ( even if powered off ) if using a JAMMA video source, else the monitor will not properly detect voltage levels. This will cause the screen to be quite dim.

JVS Conversion

The Blast City is "JVS ready". This means that by itself it cannot handle the JVS serial protocol, but it can handle VGA inputs, Stereo/RCA inputs and provide JVS power plugs.


You will need the following to use JVS systems in your Blast City

  • Jamma/JVS loom ( 600-7143-001 , aka 001 loom )
  • sega or capcom JAMMA i/o adapter

optional

  • kick loom ( see CN8 pinout above )
  • analog loom ( 600-7143-004 , sega i/o only )
  • JVS Power Supply ( if running naomi+GD-ROM attachment, chihiro or newer systems )

The sega JAMMA io adapter does not convert video signals, therefore you can run 15k or 31k through the jamma i/o board's VGA input if you wish. The signal will just go through the cabinet io.


manual

Power Wiring

the kill switch closed by the service door can easily be disconnected and replaced by a homemade loop cable. all you need a 4pin AMP UP male connector.