LAI Games Speed Of Light User manual

► Read this manual BEFORE operating the machine.
► Keep this manual for your reference.
►Go to www.LAIGames.com click on Support to register your
games and receive of future updates.
PLEASE NOTE:
© LAI Games

Correspondence regarding this machine should be addressed to your
closest LAI Games office, or LAI Games Distributor.
For contact details, refer to the back page of this manual.
LAI Games
© LAI Games
Copyright Notice:
Authorization is hereby provided to you to copy this
manual in its entirety provided such copies are used for
non-commercial purposes and solely for use with
LAI Games products. This authorization is specifically
conditioned to include all legends, copyright, proprietary
and other notices which appear herein are unaltered on
any and all copies you make.
LAI Games
[email protected] www.laigames.com

Operator's Manual –Speed Of Light
© LAI GAMES
i
LAI Games Notes
Dear Customer,
Keep up to date with new software updates or Service Bulletins for this
game.
Check our Website at www.laigames.com and click on Support, here you
will find links to all the Bulletins and Software Updates to keep your
game in top working order.
Thanks,

Operator's Manual –Speed Of Light
© LAI GAMES
ii
TABLE OF CONTENTS
SAFETY PRECAUTIONS......................................................................................................1
MACHINE INSTALLATION AND INSPECTION............................................................2
INTRODUCTION ................................................................................................................3
SPECIFICATIONS ..............................................................................................................4
ASSEMBLY THE HEADER ...............................................................................................5
ASSEMBLY THE WING SIGN..........................................................................................6
ASSEMBLY THEPLATFORM..........................................................................................7
HOW TO PLAY....................................................................................................................8
OPERATION............................................................................................................................9
OPERATIONAL DIAGRAM.............................................................................................9
ATTRACT MODE..............................................................................................................9
PLAY MODE......................................................................................................................9
TEST MODE.......................................................................................................................10
TEST MODE DIAGRAM.................................................................................................10
SOUND, LAMPS &DISPLAY TEST..............................................................................11
SWITCH TEST.................................................................................................................11
PROGRAMMABLE ADJUSTMENTS QUICK REFERENCE TABLE V1.5.2..............13
PROGRAMMABLE ADJUSTMENTS DETAILED .......................................................14
AUDITS MODE..................................................................................................................21
AUDITS MODE DIAGRAM............................................................................................21
AUDIT PROCEDURE......................................................................................................22
AUDITS QUICK REFERENCE TABLE .........................................................................23
AUDITS DETAILED........................................................................................................24
GAME HISTORY MODE..................................................................................................26
GAME HISTORY MODE DIAGRAM.............................................................................26
GAME HISTORY QUICK REFERENCE TABLE..........................................................26
GAME HISTORY PROCEDURE ....................................................................................27
ERRORS AND TROUBLESHOOTING..........................................................................28
ERROR CODE QUICK REFERENCE TABLE...............................................................28
TROUBLESHOOTING GAME ERRORS.......................................................................29
SECTION A: SERVICE INSTRUCTIONS ........................................................................30
LOCATING AND ACCESSING PARTS.........................................................................31
ELECTRONIC DETAIL POSITION...............................................................................32
PARTS DESCRIPTION.....................................................................................................33
LAMPS ................................................................................................................................35
MAINTENANCE................................................................................................................36
SECTION B: TECHNICAL DETAILS ...............................................................................37

Operator's Manual –Speed Of Light
© LAI GAMES
iii
MAINS VOLTAGE ADJUSTMENT................................................................................38
COIN OPTIONS REFERENCE GUIDE..........................................................................39
TICKET DISPENSER REFERENCE GUIDE ................................................................40
EDGE CONNECTOR PINOUT........................................................................................45
SPEED OF LIGHT MAIN WIRING DIAGRAM............................................................48
SPEED OF LIGHT MAIN WIRING 1...............................................................................49
SPEED OF LIGHT CONTROL WIRING.........................................................................50
SPEED OF LIGHT CONTROL WIRING 1......................................................................51
SPEED OF LIGHT CONTROL WIRING 2......................................................................52
SPEED OF LIGHT OPTIONAL WIRING .......................................................................53
SPEED OF LIGHTPOWER WIRING..............................................................................54

Operator's Manual –Speed Of Light
© LAI GAMES
Page 1
SAFETY PRECAUTIONS
The following safety precautions and advisories are used throughout this manual and
are defined as follows.
BE SURE TO READ THE FOLLOWING
* WARNING! *
Disregarding this text could result in serious injury.
* CAUTION! *
Disregarding this text could result in damage to the machine.
* WARNING! *
Always turn OFF Mains AC power and unplugged the game, before
opening or replacing any parts.
Always when unplugging the game from an electrical outlet, grasp the
plug, not the line cord.
Always connect the Game Cabinet to grounded electrical outlet with a
securely connected ground line.
Do Not installs the Game Cabinet outdoors or in areas of high
humidity, direct water contact, dust, high heat or extreme cold.
Do Not installs the Game Cabinet in areas that would present an
obstacle in case of an emergency, i.e. near fire equipment or emergency
exits.
* NOTE! *
Is an advisory text to hint or help understand .
* CAUTION! *
Always use a Digital Multimeter, logic tester or oscilloscope for testing
integrated circuit (IC) logic PC boards. The use of a continuity tester is
not permitted.
Do Not Connect or disconnect any of the integrated circuit (IC) logic PC
boards while the power is ON.
Do Not uses any fuse that does not meet the specified rating.
Do Not Subject the game cabinet to extreme temperature variations.
Reliability of electrical components deteriorates rapidly over 60 oC.

Operator's Manual –Speed Of Light
© LAI GAMES
Page 2
MACHINE INSTALLATION and INSPECTION
When installing and inspecting “Speed of Light”, be very careful of the following
points and pay attention to ensure that the players can enjoy the game safely.
Be sure to turn the power OFF before working on the machine.
Make sure the power cord is not exposed on the surface (floor, ground, etc.) where
people walk.
Check that the rubber glide feet levelers are set correctly on the floor so that the
game cabinet is level and stable.
Always make complete connections for the integrated circuit (IC) logic PC Boards
and other connectors. Insufficient insertion can damage the electrical
components.
Only qualified personnel should inspect or test the integrated circuit (IC) logic PC
Boards.
If any integrated circuit (IC) logic PC Boards should need servicing. Please
contact the nearest LAI Games Distributor. (Refer to the back page of this manual)
* CAUTION! *
Before Switching the machine on be sure to check that it has been set on the
correct voltage for your area!
Refer To the mains voltage adjustment section of this manual. Machines are
normally shipped on 220V AC unless otherwise specified.
* WARNING! *
Always Turn OFF mains power before removing safety covers and refit all safety
covers when work is completed.

Operator's Manual –Speed Of Light
© LAI GAMES
Page 3
INTRODUCTION
CONGRATULATIONS! On your purchase of “Speed of Light”, interactive game
that will challenge player to move hands fast to try to turn off the illuminated light on
the buttons as many as they can the many buttons pressed that much ticket they will
get it is another great product from LAI GAMES.
We hope you take the time to read this manual and learn about the many other
features and user-friendly adjustments that can be made to “fine-tune” the game for
maximum earning potential.
DESCRIPTION
The “Speed of Light”is.
PACKAGING
At delivery, the machine should arrive in good condition. To move the packaged
machine for transport or placement, use a forklift and take care not to hit the
package or stack heavy objects on top, as this may cause damage to the machine.
CONTENTS
The “Speed of Light” cabinet
Keys: 2 x coin door keys
2 x back door keys
2 x ticket door key
Operator‟s manual
IEC Power Cord (In cash box)
Parts & Accessories (In cash box)

Operator's Manual –Speed Of Light
© LAI GAMES
Page 4
SPECIFICATIONS
DIMENSIONS
Weight: 240 kg ( 529 lb)
Height: 1870 mm (73.6”)
Width: 2000 mm (78.7”)
Length: 1640 mm (65”)
Power: Maximum 228 W –(220V @1.4 A)(120V @ 2.8A)
ELECTRIC SUPPLY
The game has the option to operate on an 110V, 120V, 220V or 240V AC 50/60Hz
single phase mains electric supply.
The supply must be a three wire grounded supply.
LOCATION REQUIREMENTS
Ambient temperature: between 5oC and 40oC.
Ambient humidity: Low
Ambient U.V. radiation: Very low
Vibrations level: Low
* CAUTION! *
Before switching the machine on be sure to check that it has been set on the
correct voltage for your area!
Please Refer to the mains voltage adjustment section of this manual. Machines are
normally shipped on 220V AC unless otherwise specified.

Operator's Manual –Speed Of Light
© LAI GAMES
Page 5
ASSEMBLY THE HEADER
Position the header on top and secure with the 8 hex Bolt supplied, make sure
to connect the speaker and LED connector from inside of the header.

Operator's Manual –Speed Of Light
© LAI GAMES
Page 6
ASSEMBLY THE WING SIGN

Operator's Manual –Speed Of Light
© LAI GAMES
Page 7
ASSEMBLY THE PLATFORM
The cabinet will arrive with the
Platform folded with the cabinet;
position the Platform as per
drawing No 1.
Push the platform to the cabinet
with two metal bar in front insert
to the square hole on the base until
platform fully inserted No 2 and
No 3 Secure the Platform from the
back of cabinet first then continue
with the other screw. Adjust the
leg leveler as necessary.
No 1
No 2
No 3
No 4
Secure the Platform with the
cabinet using the side bracket and
screws supplied, adjust the leg
leveler as necessary.
Finish Platform installation

Operator's Manual –Speed Of Light
© LAI GAMES
Page 8
HOW TO PLAY
PLAYERS AIM TO TURN OFF THE LIGHT BY
PRESSING THE BUTTON AS MUCH AS THEY CAN
Pay to play.
Press the start button to play.
Press the illuminate button to get the point.
Try to press as many buttons to get the big point in given time.
The higher the point will get as many tickets.
Challenge the bonus round to make the point higher and beat the bonus point.

Operator's Manual –Speed Of Light
© LAI GAMES
Page 9
OPERATION
The “Speed of Light” game has five operational modes: Attract mode, Play mode,
Test mode, Programmable Adjustments Mode and Audits Mode.
OPERATIONAL DIAGRAM
ATTRACT MODE
The Attract mode provides a light and sound display, while the game is not being
played. This feature is to attract potential customers to play the game. The attract
mode sound can be turned on and off
(Refer to programmable adjustment page of this manual).
PLAY MODE
The “Speed of Light”has two play modes. The Standard Coin Play mode, where a
coin, or coins are inserted. Or Free Play where no coins are necessary.
COIN PLAY
The Coin Play mode is entered from Attract mode, by inserting coins in any of the
two coin slots on the front of the machine cabinet, then following the instructions
in the “How to Play” section of this manual.
FREE PLAY
The free play mode is entered from attract mode by holding the Service button for
longer than five second,
F
r
E
E
will be displayed on the 4-digit LED display.
For a single free game, just press the Service button once. When issuing single
free games in this manner, Prizes can be won as normal.
POWER UP
ATTRACT MODE
PLAY MODE
TEST MODE
PRESS TEST
AUDITS MODE
PRESS TEST
PROGRAMMABLE ADJUSTMENTS MODE
PRESS TEST
PRESS TEST
* NOTE! *
Entering test mode will
clear any stored credits

Operator's Manual –Speed Of Light
© LAI GAMES
Page 10
PROGRAMMABLE ADJUSTMENTS MODE
PLAY MODE
The Display counts,
all Lamps are flashing
and Sound is played
ATTRACT MODE
1
1
1
9
9
9
C
0
0
C
0
1
C
0
2
C
0
6
C
4
0
0
0
0
0
0
r
1
r
r
R
r
TICKET RUN TEST
Press Service button to activate
Ticket dispenser test function
TEST MODE
The “Speed of Light” Test mode has Three Test Configurations allowing you to
explore the functioning of the Sound, Light & Display, and the Game Switches and to
allow an operational test. (Refer to the Test Mode Diagram below).
The Test mode is also used for Clearing Game Errors. If there is an active error, its
code will be displayed. To try to clear the error code, press the red test button once.
The error can be bypass by quickly pressing the red test button twice.
TEST MODE DIAGRAM
* NOTE! *
Entering Test Mode will CLEAR any CREDITS remaining in the game.
If during test mode no ADJUSTMENTS or actions are made to the game for
approximately four minutes, it will automatically RETURN to Attract Mode.
SOUND, LAMPS & DISPLAY TEST
No INPUT is active
TICKET notch
is active
SERVICE switch
is active
To
PRESS TEST
PRESS TEST
SWITCH INPUT TEST
PRESS TEST
PRESS TEST
RUN TEST
PRESS
SERVICE
PRESS
SERVICE
Dispensing Ticket

Operator's Manual –Speed Of Light
© LAI GAMES
Page 11
SOUND, LAMPS & DISPLAY TEST
ENTER The Sound, Lamp & Display test is entered from Attract mode by
pressing the test button once.
DURING THE TEST:
oGame music and a voice over will be played.
oThe Credit display will count from 0000 to 9999 and then repeat.
oThe LED Playfield Display panel will run a test pattern sequence.
oThe Continue, Start/Stop and Select button lamps will flash on and off
EXIT The Sound, Lamp & Display test is exited by pressing the test button.
The next test will be switch test.
SWITCH TEST
ENTER The Switch Test can be entered by pressing the Test button once while
in the Sound, Light & display test or by pressing the Test button twice
while in Attract mode,
C
-
X
X
will be displayed on the 4-digit
display where „XX‟ is a number representing the switch that is active.
TESTING THE GAME SWITCHES
All game switches have a code from C1 to C10 as tabled below. By
activating any of the switches, their code will be displayed on the 4-
digit display. If there is no switches are active then
C
-
0
0
will be
displayed.
CODE
DISPLAY
SWITCH FUNCTION
SWITCH LOCATION
C0
C
-
0
0
No Switch Active
-
C1
C
-
0
1
Ticket Notch 1 Active
Ticket Door (if fitted)
C2
C
-
0
2
Service Switch Active
Service Panel
C3
C
-
0
3
Start/Stop Button Active
Control Panel
C4
C
-
0
4
Coin 1 Switch Active
Coin Door
C5
C
-
0
5
Coin 2 Switch Active
Coin Door
C6
C
-
0
6
Ticket Notch 2 Active
Ticket Door
C7
C
-
0
7
Mode 1 Button
Control Panel
C8
C
-
0
8
Mode 2 Button
Control Panel
C9
C
-
0
9
Mode 3 Button
Control Panel
C10
C
-
1
0
Link Mode
Cabinet Back
C11 –C40
Playfield Button
Playfield
Normal condition for the game is
C
-
0
0
, no switches are active.
* NOTE! *
If there is an active error displayed, press the red test button once to try and
clear the error.
If the error code will not clear, it can be bypass by quickly pressing the red
test button twice.
* NOTE! *
Several switches can be simultaneously activated in Switch test. The display
will then consecutively show their codes, indicating which switches are
active. However, it is much easier to test the game switches individually.

Operator's Manual –Speed Of Light
© LAI GAMES
Page 12
TICKET DISPENSER NOTCH
The Ticket Notch Switch (C1) can be activated or deactivated from the Ticket
Feed Button on the Ticket Dispenser PCB or by manually pushing the tickets from
the ticket holder through the dispenser after pulling the ticket release rod upwards
EXIT The Switch Test is exited into Run Test Mode by pressing the Test
Button once.
Ticket Tensioning
mechanism
Ticket release rod

Operator's Manual –Speed Of Light
© LAI GAMES
Page 13
PROGRAMMABLE ADJUSTMENTS QUICK
REFERENCE TABLE V1.5.2
CODE
PROGRAMMABLE
ADJUSTMENTS
OPTIONAL VALUES
DEFAULT
SETTINGS
FEATURES
P01
1 –20
1, 2, 3…20, Free
1
Coin 1 –Coins / Credit
P02
1 –10
1, 2, 3…10
1
Coin 1 –Games / Credit
P03
ON or OFF
ON or OFF
OFF
Activate Multiple Bonus Pricing Coin slot 1
P03-1
OFF –99
OFF,1,2,3,4…99
OFF
Coin 1
Number Coins for Bonus Pricing level 1
P03-2
OFF –99
OFF,1,2,3,4….99
OFF
Coin1
Number of bonus credits on Pricing level 1
P03-3
OFF –99
OFF,1,2,3,4….99
OFF
Coin1
Number Coins for Bonus Pricing level 2
P03-4
OFF –99
OFF,1,2,3,4….99
OFF
Coin 1
Number of bonus credits on Pricing level 2
P03-5
OFF –99
OFF,1,2,3,4….99
OFF
Coin 1
Number Coins for Bonus Pricing level 3
P03-6
OFF –99
OFF,1,2,3,4….99
OFF
Coin 1
Number of bonus credits on Pricing level 3
P04
1 –20
1, 2, 3…20
1
Coin 2 –Coins / Credit
P05
1 –10
1, 2, 3…10
1
Coin 2 –Games / Credit
P06
ON or OFF
ON or OFF
OFF
Activate Multiple Bonus Pricing Coin slot 2
P06-1
OFF –99
OFF,1,2,3,4…99
OFF
Coin 2
Number Coins for Bonus Pricing level 1
P06-2
OFF –99
OFF,1,2,3,4….99
OFF
Coin 2
Number of bonus credits on Pricing level 1
P06-3
OFF –99
OFF,1,2,3,4….99
OFF
Coin 2
Number Coins for Bonus Pricing level 2
P06-4
OFF –99
OFF,1,2,3,4….99
OFF
Coin 2
Number of bonus credits on Pricing level 2
P06-5
OFF –99
OFF,1,2,3,4….99
OFF
Coin 2
Number Coins for Bonus Pricing level 3
P06-6
OFF –99
OFF,1,2,3,4….99
OFF
Coin 2
Number of bonus credits on Pricing level 3
P07
ON or OFF
ON or OFF
ON
Attract Mode Sound
P08
0 –2
0,1, 2
2
Beat the High Score Bonus Type
P09
1 –10(Credit)
1 –100 (Tickets)
1, 2, 3,…10 Credit
1,2,3,…20 Tickets
20 Tickets
Number of Bonus For Beat High Score
P10
0 –2
0,1, 2
2
High Score 999 Bonus Type
P11
1 –10(Credit)
1 –100 (Tickets)
1, 2, 3,…10 Credit
1,2,3,…20 Tickets
50 Tickets
Number of Bonus to reach High Score 999
P12
1 –100
1,2,3,….100
20
Number of points per Tickets
P13
0 –10
1,2,3,…10
8
Number Of Minimum Tickets
P14
No Max, 5 –100
No, 5, 6, 7…50, 55 ...100
0 (No)
Number Of Maximum Tickets
P15
ON or OFF
ON or OFF
OFF
Dispense Ticket in Free Mode
P16
10 –500
10,15,…100,110,..500
500
Default high Score adjustment
P17
10 –999
10,15,…100,110,..999
500
Current High Score Adjustment
P18
ON or OFF
ON or OFF
ON
Retain High Score Value
P19
No, Tic, Cap
No, Tic, Cap
Tic
Dispense Type Option
P20
0 –2
0,1,2
0
Game link type
P21
1 - 4
1,2,3,4
1
Error Message Option
P22
ON or OFF
ON or OFF
ON
Common Coin Option
P23
ON or OFF
ON or OFF
OFF
Double Player –one credit
P24
On or OFF
ON or OFF
OFF
Card System
P25
OFF,1 –4
OFF,1,2,3,4
OFF
Competition Mode

Operator's Manual –Speed Of Light
© LAI GAMES
Page 14
PROGRAMMABLE ADJUSTMENTS DETAILED
P01 = COIN 1: NUMBER of COINS PER CREDIT
(Default 01) (Adjustable 1 –20, Free)
This sets the number of coins that need to be inserted into coin mechanism one,
for each credit. It can be set between 1 to 20 coins for one credit. The default
setting is 1. Setting this to “Free” enables free play mode. This stays active when
the machine is switched on and off.
P02 = COIN 1: NUMBER of GAME PLAYS PER CREDIT
(Default 01) (Adjustable 1 –20)
This sets the number of games for each credit inserted into coin mechanism 1. It
can be set between 1 to 20 plays for each credit. The default setting is “1”.
P03 = COIN 1: ACTIVATE MULTIPLE BONUS PRICING
(Default OFF) (Adjustable ON –OFF)
Note: Settings P 03 and P 03-1 thru to P03-6 are only used for the setting of
Bonus credit levels e.g. $0.50c/1 play, $1/3plays, $2/7plays, $5/20 plays
This turns on the multiple bonus credit system and activates the settings for up to
3 bonus levels on coin mechanism 1. It can be set to ON or OFF. The default
setting is “OFF” this mean the multiple bonuses is disabled, if the setting is
changed to ON the multiple bonus setting will be active and open the next sub-
menu P03-1 and so on.
P03 - 1 = COIN 1: NUMBER of COINS REQUIRED TO REACH
BONUS CREDIT LEVEL 1
(Default OFF) (Adjustable OFF –99)
This sets the number of coins (or Bill Acceptor pulses) that need to be inserted
into coin mechanism 1 to reach the bonus credit level 1. It can be set to either OFF
for no bonus or 1 to 99 coins, (OFF=No bonus), the default setting is “OFF” this
means that the P03-2 will not open
Examples
(Base price $0.25c)
(Base Price $0.50c
(Base Price $0.50c)
(Base Price $1.00)
P Setting
Adjustment
1 play $ 0.25c
1 play $ 0.50c
1 play $ 0.50c
1 play $ 1.00
3 plays $ 0.50c
3 plays $ 1.00
3 plays $ 1.00
3 plays $ 2.00
7 plays $ 1.00
7 plays $ 2.00
8 plays $ 2.00
8 plays $ 5.00
($0.25c coins or
DBA set on $0.25c
pulses)
($0.25c coins or
DBA set on $0.25c
pulses)
22 plays $ 5.00
18 plays $ 10.00
($0.25c coins or
DBA set on $0.25c
pulses)
($0.25c coins or
DBA set on $0.25c
pulses)
P01 / P04
1
2
2
4
P02 / P05
1
1
1
1
P03 / P06
ON
ON
ON
ON
P3-1 / P6-1
2
4
4
8
P3-2 / P6-2
1
1
1
1
P3-3 / P6-3
4
8
8
20
P3-4 / P6-4
3
3
4
3
P3-5 / P6-5
OFF
OFF
20
40
P3-6 / P6-6
OFF
OFF
12
8

Operator's Manual –Speed Of Light
© LAI GAMES
Page 15
P03 - 2 = COIN 1: NUMBER of BONUS CREDITS GIVEN AT
BONUS LEVEL 1
(Default OFF) (Adjustable OFF –99)
This sets the number of bonus credits that are given when credit Level 1 is
reached. This Bonus amount is the additional number of credits required above
the base price. It can be set to either OFF, or between 1 to 99 bonus credits; the
default setting is “OFF” this mean that the P03-3 will not open.
Note: The Base Price is the normal price setting for one game.
e.g. If the game is set for $0.25c/1play then the base price is $0.25c, if the game is
set for $0.50c/1play then the base price is $0.50c, if the game is set for
$1.00/1play then the base price is $1.00.
P03 - 3= COIN 1: NUMBER of COINS REQUIRED TO REACH
BONUS CREDIT LEVEL 2
(Default OFF) (Adjustable OFF –99)
This sets the number of coins (or Bill Acceptor pulses) that is needed to be
inserted into coin mechanism 1 to reach the bonus credit level 2. It can be set to
OFF for no bonus or between 1 to 99 coins, but the setting value must be higher
than setting value of P03-1, the default setting is “OFF” and if set to OFF this
means that the P03-4 will not open.
P03 - 4 = COIN 1: NUMBER of BONUS CREDITS GIVEN AT
BONUS LEVEL 2
(Default OFF) (Adjustable OFF –99)
This sets the number of bonus credits that are given when credit Level 2 is
reached. This Bonus amount is the additional number of credits required above
the base price. It can be set to either OFF, or between 1 to 99 bonus credits; the
default setting is “OFF” this mean that the P03-5 will not open.
P03 - 5= COIN 1: NUMBER of COINS REQUIRED TO REACH
BONUS CREDIT LEVEL 3
(Default OFF) (Adjustable OFF –99)
This sets the number of coins (or Bill Acceptor pulses) that is needed to be
inserted into coin mechanism 1 to reach the bonus credit level 3. It can be set to
OFF for no bonus or between 1 to 99 coins, but the setting value must be higher
than setting value of P03-3, the default setting is “OFF” and if set to OFF this
mean that the P03-6 will not open.
P03 - 6 = COIN 1: NUMBER of BONUS CREDITS GIVEN AT
BONUS LEVEL 3
(Default OFF) (Adjustable OFF –99)
This sets the number of bonus credits that are given when credit Level 3 is
reached. This Bonus amount is the additional number of credits required above
the base price. It can be set to either OFF, or between 1 to 99 bonus credits; the
default setting is “OFF”