Sega NAOMI 2 User Manual

General safety instructions for product operation, including warnings and cautions.

Explanation of pictographs used for safety, including DANGER, WARNING, CAUTION, and care symbols.

Essential operating procedures such as turning off power, grounding, and fuse usage for safe product operation.

Details the manual's intent to provide comprehensive operation and servicing information for the NAOMI 2.

Defines the terms 'Location's Maintenance Man' and 'Serviceman' and their respective activities.

Precautions for handling IC boards, including preventing damage from dust, static electricity, and heat.

Instructions on maintaining proper cooling for the NAOMI 2 board case and GD-ROM drive.

Importance of the shield case and compatibility of monitor frequencies (15kHz/31kHz) with the NAOMI 2.

Note on potential discontinuation or changes to general-purpose parts affecting repairability.

Requirements for using the NAOMI 2 with JVS-compatible cabinets and potential modifications.

Identification and function of the NAOMI 2 main board case, shield case, and filter board components.

Guidelines for setting monitor direction and selecting horizontal scanning frequency (15kHz/31kHz) for optimal display.

Instructions for packaging and shipping the NAOMI 2 for repair or servicing, including necessary documentation.

Procedure for detaching and reattaching the ROM board case to the NAOMI 2 board.

Detailed instructions for replacing ROMs on the ROM board, including proper handling and disposal of old ROMs.

Procedure for replacing the battery on the NAOMI 2 main board, specifying the battery type (CR2032).

Troubleshooting guide for error messages 01 through 04, detailing causes and corrective actions.

Troubleshooting guide for error messages 21 through 26, covering GD-ROM issues and option board malfunctions.

Troubleshooting for error message 27, related to insufficient DIMM memory capacity or connection.

Introduction to the system test mode, its purpose, and how to navigate its menus.

Procedure for testing the RAM performance on the NAOMI 2 main board.

Functionality to check I/O Board specifications and perform input tests.

Test for emitting beep sounds from the left and right speakers.

Tests for adjusting monitor color and size, ensuring proper display calibration.

Configuration settings for cabinet type, player count, advertise sound, and monitor type.

Settings for coin chute type, coin/credit ratios, and manual sequence configurations.

Functionality to check operational data like total time, coin counts, and credit usage.

Procedure to clear backup data, including bookkeeping and other system settings.

Setting the system clock for the NAOMI 2 Main BD, including year, month, day, hour, and minute.

Tests the DIMM memories and ICs on the DIMM board when connected to the NAOMI 2.

Executes a ROM check on the ROM board, displaying results for each IC.

Enters test mode for the connected game, including input, assignments, and bookkeeping.