Sega 999-0858 - Manual (Page 3)

SEGA Service Department http://www.seuservice.com
45133 Industrial Drive
Phone: 415.701.6580
Fremont, Ca. 94538 Fax: 415.701.6594
If you have any questions please contact the SEGA Service Department at the numbers given above.
MA_ADD
Before starting work be sure to turn power off. Failure to observe this can
cause electric shock and short circuit hazards.
Use care so as not to damage wirings. Damaged wirings can cause electric
shock or short circuit accidents.
This work should be performed by the Locations Maintenance Man or
Serviceman. Performing work by those who do not have technical expertise
can cause electric shock accident, or damage to the Game Board
1.) Turn power off & Disconnect all plugs from the Game Board Cage.
2.) Remove Cage and open Case Lid.
3.) Remove (12) phillips screws and remove the PCB from Cage.
4.) Remove (4) phillips screws and nuts that secure Security Board to CPU
Board. Remove Security Board.
5.) Install new Security Board and secure with the (4) philips screws previously
removed; DO NOT OVER TIGHTEN!
6.) Remove each of the (41) E-Proms and Mask Roms from the Rom Board. Be
careful not to scratch the Board or break sockets.
7.) Install new E-Proms and Mask Roms. Be careful not to damage IC by static
electricity. Be careful not to bend pins while inserting E-Proms and Mask Roms.
8.) Re-install Game Board into cage, then replace cage into cabinet. Reconnect
all connectors.
9.) Power On Game and test for proper operation. Set all game options.
KIT INSTALLATION INSTRUCTIONS:
Please see diagrams on the following page for E-PROM and ROM layout.
EMERGENCY CALL AMBULANCE
ROM CHANGE INSTRUCTIONS