Sega Naomi Gd Rom Service Manual

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3 - 5  GD-ROM DISK
Handling the GD-ROM Disk

Do not contaminate the disks with your fingerprints or
dust particles. Contaminated disks may lower audio
and video quality.

When cleaning the disks, do not use volatile chemicals
(benzine, thinner, etc.), cleaning sprays, and antistatic
agents.

Do not use cracked, warped, or damaged disks.
Do not attach papers or seals onto the disks; do not
scratch the disks.
Do not use the disks with a sign of peeled seals, tapes, etc.
Observing these instructions, do...

15
How to Attach
Remove the 1 truss head screw that fixes the GD-ROM drive lid (DISC LID). And turn
clockwise the lid to remove.
Take out the GD-ROM disc from its case, and set it onto the GD-ROM drive with a labeled side
facing you.
Return the lid to its original place, and fix it with 1 truss head screw. Be careful not to fasten it
too tightly.
How to Detach
Remove the 1 truss head screw that fixes the GD-ROM drive lid (DISC LID). And turn
clockwise the lid to remove.
Take out the GD-ROM disc and store...

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3 - 6  CONNECTING THE POWER
After making sure that the system has been correctly assembled, connect the power to the cabinet.
Make sure that a NAOMI GD-ROM SYSTEM logo appears.
Make sure that the system starts to read out the game from the GD-ROM. Percentage is displayed
during readout.
Make sure that a NAOMI GD-ROM SYSTEM logo reappears several minutes after readout.
Make sure that an advertising screen appears.
• If an error message appears, immediately disconnect the power to the cabinet. Referring...

17
3 - 7  REPLACING THE DIMM BOARD BATTERY PACK

Do not disassemble.
Do not disassemble the battery pack and the batteries. If you should fail to
observe this instruction, the internal wires and/or protective devices may be
damaged; as a result the safety system may not function when discharging and
recharging, eventually causing an overheating, fire and explosion. If you
should disassemble the batteries, the generated gases may harm your throat
and the negative plate may overheat and make a fire.

Do...

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Do not tightly seal.
Do not tightly seal the battery pack when installing it onto an external device.
Flammable gas is generated from the battery when its safety mechanism has
functioned. If you should fail to observe the above-described instruction,
sparks from motors, switches, etc. may cause the gas to fire. Therefore, install
the battery pack so that the gas can be quickly released from the external
device.

Do not use for other applications.
Do not use the battery pack for the device/usage other...

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When a GD-ROM readout time seems to be longer than before, the cause may be a reduction of
DIMM board battery pack's charge. Usually, the DIMM board battery pack reaches its service
life about 16 months after starting to use.
Do not use a battery charger because any battery charger is not usable for this battery pack.
Instead, replace the battery pack with a new one as follows:
Using a Phillips-head screwdriver, lift up the battery cover and thus remove it from the DIMM
board case.
Press the tab...

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3 - 8  BATTERY REPLACEMENT (NAOMI MAIN BD)
Except for special cases such as using up the battery, etc., do not perform this work.
Turn power off, and remove ROM BD Case from NAOMI Case by referring to 3-3
DETACHING/ATTACHING THE DIMM BOARD CASE above.
Carefully remove the battery on the Battery Holder of NAOMI Main BD.
With the positive pole facing upward, insert the new Battery (CR2032) into the Holder.
By referring to 3-3 DETACHING/ATTACHING THE DIMM BOARD CASE, reinstall ROM
BD Case to NAOMI Case....

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4.  ERROR MESSAGE
In the following cases, ERROR MESSAGE is displayed at the time power is turned on and the
test mode is finished, and the game is not playable.
ERROR 01
[DISPLAY] ERROR 01
THIS GAME IS NOT ACCEPTABLE
BY MAIN BOARD.
[CAUSE] The ROM BOARD (or DIMM BOARD) is not connected correctly to the
MAIN BD.  The NAOMI 2 ROM board is mounted on the NAOMI main
board.
[COUNTERMEASURES] First, turn power off, connect the ROM BD (or DIMM BOARD) correctly.
If the status is not improved yet, the board...

22
ERROR 21
[DISPLAY] ERROR 21
THIS GAME IS NOT ACCEPTABLE BY MAIN BOARD.
[CAUSE] Game data (loaded from the GD-ROM to the DIMM board) are corrupted.
The NAOMI 2 GD-ROM disk is used with the NAOMI main board.
[COUNTERMEASURES] Make sure that the GD-ROM drive is firmly connected to the NAOMI board.
Make sure that the GD-ROM disk is not scratched or contaminated.
The NAOMI 2 GD-ROM disk software cannot run with the NAOMI main
board. If you want to run the NAOMI 2 GD-ROM disk software, replace the
NAOMI...

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ERROR 27
[DISPLAY] ERROR 27
DIMM MEMORY IS NOT ENOUGH.
[CAUSE] (1) The capacity of the DIMM memory on the DIMM board is not sufficient.
(2) The DIMM memory is not firmly connected.
[COUNTERMEASURES] (1) Add the memory as required by the software you are using. (2) Firmly
reconnect the DIMM memory on the DIMM board.