Sega Naomi Gd Rom Service Manual

							1ST  PRINTING JUNE  01
MANUAL NO. 420-6620-02
SEGA ENTERPRISES, INC.  USA
NAOMI
GD-ROM SYSTEM
SERVICE MANUAL
TM 
						

							Warranty
Your new Sega Product is covered for a period of 90 days from the date of shipment.  This certifies
that the Printed Circuit Boards, Power Supplies and Monitor are to be free of defects in workman-
ship or materials under normal operating conditions.   This also certifies that all Interactive Control
Assemblies are to be free from defects in workmanship and materials under normal operating condi-
tions.  No other product in this machine is hereby covered.
Sellers sole liability in the event a warranted part described above fails shall be, at its option, to
replace or repair the defective part during the warranty period.  For Warranty claims, contact your
Sega Distributor.
Should the Seller determine, by inspection that the product was caused by Accident, Misuse, Ne-
glect, Alteration, Improper Repair, Installation or Testing, the warranty offered will be null and void.
Under no circumstances is the Seller responsible for any loss of profits, loss of use, or other dam-
ages.
This shall be the exclusive written Warranty of the original purchaser expressed in lieu of all other
warranties expressed or implied.  Under no circumstance shall it extend beyond the period of time
listed above. 
						

							BEFORE USING THE PRODUCT, BE SURE TO READ THE FOLLOWING:
To maintain the safety:
To ensure the safe usage of the product, be sure to read the following before using the product.  The following
instructions are intended for the users, operators and the personnel in charge of the operation of the product.
After carefully reading and sufficiently understanding the warning displays and cautions, handle the product
appropriately.  Be sure to keep this manual nearby the product or elsewhere convenient for referring to it
when necessary.
Herein, explanations which require special attention are enclosed with dual lines.  Depending on the poten-
tially hazardous degrees, the terms of WARNING, CAUTION, etc. are used.  Be sure to understand the
contents of the displays before reading the text.
Indicates that mishandling the
product by disregarding this
warning will cause a potentially
hazardous situation which can
result in death or serious injury.Indicates that mishandling the product
by disregarding this caution will cause
a slight hazardous situation which can
result in personal injury and or material
damage.
For the sage usage of the product, the following pictographs are used:
Indicates “HANDLE WITH CARE.”  In order to protect the human body an equipment, this
display is attached to places where the Owner’s Manual and or Service Manual should be referred
to.
Perform work in accordance with the instructions herein stated.
Instructions for work are explained by paying attention to the aspect of accident prevention.  Failing to
perform work as per the instructions can cause accidents.  In the case where only those who have techni-
cal expertise should perform the work to avoid hazardous situation, the instructions herein state that the
serviceman should perform such work.
Be sure to turn off power before working on the machine.
To prevent electric shock, be sure to turn off power before starting the work in which the worker touches
the interior of the product.  If the work is to be performed in the power-on status, the Instruction Manual
herein always states to that effect.
Be sure to ground the Earth Terminal (this, however, is not required in the case where a power cord
with earth is used).
This product is equipped with the Earth Terminal.  When installing the product, Connect the Earth Termi-
nal to the “accurately grounded indoor earth terminal” by using an earth wire.  Unless the product is
grounded appropriately, the user can be subject to electric shock.  After performing repair, etc. for the
Control equipment, ensure that the Earth Wire is firmly connected to the Control equipment.
Ensure that the Power Supply used is equipped with an Earth Leakage Breaker.
This product does not incorporate the Earth Leakage Breaker.   Using a power supply which is not
equipped with the Earth Leakage Breaker can cause a fire when earth leakage occurs.
Be sure to use fuses which meet the specified rating. (only for the machines which use fuses).
Using fuses exceeding the specified rating can cause a fire and electric shock. 
						

							Specification changes (removal of equipment, conversion and addition) not designated by SEGA
are not allowed.
The parts of the product include warning labels for safety, covers for personal protection, etc.  It is very
hazardous to operate the product by removing parts and or modifying the circuits.  Should doors, lids
and protective parts be damaged or lost, refrain from operating the product, and contact where the
product was purchased from or the office herein stated.  SEGA shall not be held responsible for any
accidents, compensation for damage to a third party, resulting from the specifications not designated by
SEGA.
Ensure that the product meets the requirements of appropriate Electrical Specifications.
Before installing the product, check for Electrical Specifications.  SEGA products have a nameplate on
which Electrical Specifications are described.  Ensure that the product is compatible with the power
supply voltage and frequency requirements of the location.  Using any Electrical Specifications different
from the designated Specifications can cause a fire and electric shock.
Install and operate the product in places where appropriate lighting is available, allowing warning
labels to be clearly read.
To ensure safety for the customers, labels and printed instructions describing potentially hazardous
situation are applied to places where accidents can be caused.  Ensure that where the product is operated
has sufficient lighting allowing the warnings to be read.  If any label is peeled off, apply it again imme-
diately.  Please place an order with where the product was purchased from or the office herein stated.
When handling the Monitor, be very careful.  (Applies only to the product w/monitor.)
Some of the monitor (TV) parts are subject to high tension voltage.  Even after running off power, some
portions are still subject to high tension voltage sometimes.  Monitor repair and replacement should be
performed only be those technical personnel who have knowledge of electricity and technical expertise.
Be sure to adjust the monitor (projector) properly.  (Applies only to the product w/monitor.)
Do not operate the product leaving on-screen flickering or blurring as it is.  Using the product with the
monitor not properly adjusted may cause dizziness or a headache to an operator, a player, or the custom-
ers.
When transporting or reselling this product, be sure to attach this manual to the product.
In the case where commercially available monitors and printers are used in this product, only the
contents relating to this product are explained herein.  Some commercially available equipment has
functions and reactions not stated in this manual.  Read this manual together with the specific Instruc-
tion Manual of such equipment.
Descriptions herein contained may be subject to improvement changes without notice.
The contents described herein are fully prepared with due care.  However, should any question arise or
errors be found, please contact SEGA.
•
•
INSPECTIONS IMMEDIATELY AFTER TRANSPORTING THE PRODUCT TO THE LOCATION.
Normally, at the time of shipment, SEGA products are in a status allowing for usage immediately after
transporting to the location.  Nevertheless, an irregular situation may occur during transportation.  Before
turning on power, check the following points to ensure that the product has been transported in a satisfac-
tory status.
Are there any dented portions or defects (cuts, etc.) on the external surfaces of the cabinet?
Are Casters and Adjusters, damaged?
Do the power supply voltage and frequency requirements meet with those of the location?
Are all wiring connectors correctly and securely connected?  Unless connected in the correct direction,
connector connections can not be made accurately.  Do not insert connectors forcibly.
Do power cords have cuts and dents?
Do the fuses used meet specified rating?  Is the Circuit Protector in an energized status?
Are all accessories available?
Can all Doors and Lids be opened with the Accessory keys?  Can Doors and Lids be firmly closed? 
						

							BEFORE USING THE PRODUCT, BE SURE TO READ THE FOLLOWING:
TABLE OF CONTENTS
INTRODUCTION OF THE SERVICE MANUAL
1.   HANDLING PRECAUTIONS .........................................................................   1
2.  SPECIFICATIONS OF NAOMI GD-ROM SYSTEM .....................................   2 - 6
        2 - 1    CABINET ............................................................................................   2
        2 - 2    NAOMI BD CASE AND FILTER BOARD .......................................   3
        2 - 3    MONITOR DIRECTION AND HORIZONTAL SCANNING
                    FREQUENCY .....................................................................................   4
        2 - 4    REPAIR /  SERVICING AND CARTON BOX .................................   5 - 6
3.   ASSEMBLING THE NAOMI GD-ROM SYSTEM ........................................   7 - 20
        3 - 1    CHECKING THE BOOT ROM VERSION NUMBER .....................    9
        3 - 2    BOOT ROM REPLACEMENT ..........................................................   10 - 11
        3 - 3    DETACHING / ATTACHING THE DIMM BOARD CASE ............   12
        3 - 4    KEY CHIP ...........................................................................................   13
        3 - 5    GD-ROM DISK ...................................................................................   14 - 15
        3 - 6    CONNECTING THE POWER ...........................................................    16
        3 - 7    REPLACING THE DIMM BOARD BATTERY PACK ...................    17 - 19
        3 - 8    BATTERY REPLACEMENT  (NAOMI MAIN BD) ........................    20
4.   ERROR MESSAGE .........................................................................................    20 - 24
5.   SYSTEM TEST MODE ...................................................................................    25 - 37
       5 - 1     RAM TEST .........................................................................................    26
       5 - 2     JVS TEST ............................................................................................   27
       5 - 3     SOUND TEST ....................................................................................    28
       5 - 4     C.R.T. TEST ........................................................................................   28
       5 - 5     SYSTEM ASSIGNMENTS ................................................................   29
       5 - 6     COIN ASSIGNMENTS ......................................................................   30 - 34
       5 - 7     BOOKKEEPING .................................................................................   35
       5 - 8     BACKUP DATA CLEAR ..................................................................    36
       5 - 9     CLOCK SETTING ..............................................................................   36
       5 -10    DIMM BOARD TEST ........................................................................   37
       5 - 11   GAME TEST MODE ..........................................................................   37
TABLE OF CONTENTS 
						

							INTRODUCTION OF THE OWNERS MANUAL
This Owners Manual is intended to provide detailed descriptions together with all
the necessary information covering the general operation of electronic assemblies,
electromechanicals, servicing control, spare parts, etc. as regards the product,
NAOMI GD-ROM SYSTEM.
This manual is intended for the owners, personnel and managers in charge of
operation of the product.  Operate the product after carefully reading and sufficiently
understanding the instructions.  If the product fails to function satisfactorily, non-
technical personnel should under no circumstances touch the internal system.  Please
contact where the product was purchased from.
SEGA ENTERPRISES, INC. (U.S.A.)/CUSTOMER SERVICE
45133 Industrial Drive, Fremont, California 94538, U.S.A.
Phone : (415) 701-6580
Fax   :   (415) 701-6594
Use of this product is unlikely to cause physical injuries or damages to property.  However,
where special attention is required this is indicated by a thick line, the word IMPORTANT
and its sign in this manual.
Indicates that mishandling the product by disregarding this display can cause the
products intrinsic performance not to be obtained, resulting in malfunctioning.
STOP
IMPORTANT 
						

							DEFINITION OF LOCATION MAINTENANCE MAN AND SERVICEMAN
Non-technical personnel who do not have technical knowledge and expertise should
refrain from performing such work that this manual requires the locations
maintenance man or a serviceman to carry out, or work which is not explained in
this manual.  Failing to comply with this instruction can cause a severe accident
such as electric shock.
Ensure that parts replacement, servicing & inspections, and troubleshooting are performed by the
locations maintenance man or the serviceman.  It is instructed herein that particularly hazardous
work should be performed by the serviceman who has technical expertise and knowledge.
The locations maintenance man and serviceman are herein defined as follows:
Locations Maintenance Man :
Those who have experience in the maintenance of amusement equipment and vending machines,
etc., and also participate in the servicing and control of the equipment through such routine work
as equipment assembly and installation, servicing and inspections, replacement of units and
consumables, etc. within the Amusement Facilities and or locations under the management of the
Owner and Owners Operators of the product.
Activities of Locations Maintenance Man :
Assembly & installation, servicing & inspections, and replacement of units & consumables as
regards amusement equipment, vending machines, etc.
Serviceman :
Those who participate in the designing, manufacturing, inspections and maintenance service of
the equipment at an amusement equipment manufacturer.
Those who have technical expertise equivalent to that of technical high school graduates as re-
gards electricity, electronics and or mechanical engineering, and daily take part in the servicing &
control and repair of amusement equipment.
Servicemans Activities :
Assembly & installation and repair & adjustments of electrical, electronic and mechanical parts of
amusement equipment and vending machines. 
						

							1
1.  HANDLING PRECAUTIONS

To prevent electric shock or IC Board malfunctioning, be sure to turn off the
power for the cabinet when installing or removing the IC Board.

Extraneous matter such as dust on the IC Board can cause the IC Board to
generate heat and result in a fire due to short circuit, etc.  Ensure the IC Board
surfaces are always kept clean.

Keep the IC board well cooled.
The NAOMI board case and GD-ROM drive are provided with ventilating
fans. Do not block the air outlets of these fans. Also do not place anything
closely to the NAOMI board case and GD-ROM drive. Failure to observe
these instructions may cause an overheating and fire.

Be sure to connect the IC Board and connectors completely .  Insufficient
insertion can damage IC Board, etc.

For the IC Board circuit inspection, only the use of Logic Tester is permitted.
The use of ordinary testers is not permitted as these can damage the IC Board.

Do not subject the IC Board to static electricity when installing the IC Board
in the cabinet or when connecting wire harness connectors to the IC Board.

When soldering buttons, etc. to the wire harnesses, be sure to remove the wire
harnesses from the IC Board so as not to subject the IC Board to heat.

Using NAOMI without the Shield Case can cause electric wave trouble.  Be
sure to use NAOMI together with the accessory Shield Case.

The monitor frequency corresponding to NAOMI is 15kHz or 31kHz.
NAOMI can not be used for the cabinet incorporating a monitor or projector
not corresponding to 15kHz or 31kHz.

Use the NAOMI board with the JVS-compatible cabinet. Using it with the
non-JVS-compatible cabinet may cause an overheating and fire.

Concerning the display of JAMMA VIDEO STANDARD:
JAMMA VIDEO STANDARD adopted by NAOMI is referred to as JVS.  As against this
Standard, the conventional JAMMA STANDARD which employs 56P Edge Connectors
adopted by ST-V, etc. is displayed as Old JAMMA STANDARD.
The specific Manual attached to each game sometimes displays JVS as JV STANDARD, New
JAMMA STANDARD, or JAMMA 2 STANDARD AGAINST OLD JAMMA STANDARD as
JAMMA STANDARD, JS, etc.

The contents herein described are subject to change without notice.
STOP
IMPORTANT 
						

							2
2.  SPECIFICATIONS OF NAOMI GD-ROM SYSTEM
2 - 1   CABINET
• Use the NAOMI GD-ROM system with the JVS-compatible cabinet.
• If you want to use the NAOMI GD-ROM system with the conventional JAMMA-compatible
cabinet, prepare the modification parts (power supply, I/O board, audio amplifier, etc.) and
thereby modify the cabinet into a JVS-compatible one.
• Contact a cabinet manufacturer or distributor to check whether or not:
- the cabinet is JVS-compatible and
- the cabinet can be modified into a JVS-compatible one and used with the GD-ROM
system.
• Some games may require not only a JVS-compatible cabinet but also a dedicated control
panel. 
						

							3
2 - 2   NAOMI BD CASE AND FILTER BOARD
• NAOMI Main BD is contained in the Shield Case.
Use NAOMI in the status with the Main BD as is contained in the Shield Case.
• When using NAOMI, ensure that the Ventilation Ports and Heat Exhaust Fan opening are not
obstructed.
FIG. 2. 2 a
NAOMI SHIELD CASE VENTILATION PORT GD Cable Connector
DIMM BOARD CASE LEG BRACKET Key Chip Slot
FILTER BOARD HEAT EXHAUST FAN OPENING
FIG. 2. 2 b
CN1: POWER SUPPLY (JST VL 8P)  1: (N.C.)  2: +3.3V  3: +5V  4: +12V  5 ~ 8: GND
CN2: POWER SUPPLY (JST VL 6P)  1: (N.C.)  2: +3.3V  3: +5V  4 ~ 6: GND
CN3: VIDEO OUTPUT (MINI D-SUB 15P)
CN4: STEREO-AUDIO OUTPUT(RCA PIN JACK FEMALE)  RED: RIGHT  WHITE: LEFT
CN5: STANDARD I/O (SERIES A TYPE) Connected to I/O BD via. USB Cable.
CN6 ~ 9,12: Normally not used.
TORX194,TOTX195: OPTIC FIBER CONNECTOR
Used for communication in-between plural NAOMI.
For application, refer to the Instruction Manual of the game for
communication play.
PSW1: Functions as TEST Button.
PSW2: Functions as SERVICE Button.
DIPSW: Used for image Frequency change, etc.Refer to 2-3 MONITOR DIRECTION AND
HORIZONTAL SCANNING FREQUENCY.
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