Herunterladen Inhalt Inhalt
Teilen
Diese Seite drucken
NAMCO Time crisis 2 Dlxe Handbuch
  1. Anleitungen
  2. Marken
  3. NAMCO Anleitungen
  4. Videospiele
  5. Time crisis 2 Dlxe
  6. Handbuch
NAMCO Time crisis 2 Dlxe Handbuch

NAMCO Time crisis 2 Dlxe Handbuch

Vorschau ausblenden
Inhaltsverzeichnis

Werbung

Quicklinks

Diese Anleitung herunterladen
TIME CRISIS 2
Dlxe

Operators Manual

I
T IS THE RESPONSIBILITY OF THE OPERATOR TO MAINTAIN CUSTOMER SAFETY
,
AT ALL TIMES
AND IT IS IMPERATIVE THAT THE DETAILS SET OUT IN THIS MANUAL
.
ARE FOLLOWED PRECISELY
Part No. 90500049

Werbung

Inhaltsverzeichnis
loading

Verwandte Anleitungen für NAMCO Time crisis 2 Dlxe

Inhaltszusammenfassung für NAMCO Time crisis 2 Dlxe

  • Seite 1: Operators Manual

    TIME CRISIS 2 Dlxe Operators Manual T IS THE RESPONSIBILITY OF THE OPERATOR TO MAINTAIN CUSTOMER SAFETY AT ALL TIMES AND IT IS IMPERATIVE THAT THE DETAILS SET OUT IN THIS MANUAL ARE FOLLOWED PRECISELY Part No. 90500049...

  • Seite 3: Portable Appliance Testing

    P O R T A B L E A P P L I A N C E T E S T I N G Please Note: During testing of the machine with a portable appliance tester the insulation test will show a failure due to the fitting of two VDRs between Live/Earth and Neutral/Earth.

  • Seite 4: Safety Warning

    This machine is for indoor use only and should only be used for the purpose intended. Namco Ltd. bears no responsibility for accidents, injury or damage resulting from unauthorized changes to, or improper use of this machine.

  • Seite 5: Removing And Replacing Parts

    Do not make any alteration to this machine without prior approval. Doing so could cause unforeseeable danger. Only parts specified by Namco Europe Ltd should be used when replacing or repairing parts. (Including screws). Ensure that the power to the machine is turned OFF before commencing any maintenance work. (Trouble shooting, repairs etc.)

  • Seite 6: Allgemeine Sicherheitshinweise

    (Suchsysteme), die Weitergabe oder sonstiges Kopieren für den gewerblichen und privaten Gebrauch sind untersagt und bedürfen der vorherigen Genehmigung durch NAMCO EUROPE LIMITED. Die informationen in diesem Handbuch entsprechen den Tatsachen bei Drucklegung. NAMCO EUROPE LIMITED behält sich jedoch das Recht zu Änderungen ohne vorherige Bekanntgabe vor.

  • Seite 7: Aus- Und Einbau Von Komponenten Und Teilen

    Es dürfen keierlei Veränderungen ohne vorherige Genehmigung am Gerät vorgenommen werden. Zuwiderhandlungen stellen eine Gefahrenquelle dar. Für die Repartur dürfen nur Originalersatzteile (incl. Schrauben) von NAMCO EUROPE LTD. verwendet werden. Vor Beginn aller Wartungsarbeiten (Fehlersuche, Reparaturen etc.) muß der Netzstecker gezogen werden.

  • Seite 8: Generelle Sikkerhedsovervejelser

    Denne rnaskine er kun til indendørs brug og bør kun bruges til det beregnede formål. Namco Ltd. bærer intet ansvar for ulykker eller skader som er et resultat af uautoriserede ændringer eller fejlagtig brug af denne rnaskine.
  • Seite 9 Justeringer eller vedligehold af denne maskine bør kun udføres af kvalificeret personale. Skift ikke noget på maskinen uden godkendelse, det kan føre til uforudset fare. Der bør kun bruges dele specificeret af Namco Europe Limited når der skiftes eller repareres dele (inklusiv skruer).

  • Seite 10: Consideraciones Generales De Seguridad

    Esta máquina es únicamente para ser usada en interiores, y sólo debe usarse para aquello para lo que ha sido creada. Namco Ltd. queda exenta de cualquier responsabilidad por accidentes, heridas o daños causados por cambios no autorizados o uso indebido de esta máquina.
  • Seite 11 No realice alteraciones en esta máquina sin aprobación previa. De hacerlo así, pueden causar peligros imprevisibles. Sólo deben usarse las partes especificadas por Namco Europe Ltd. para reparaciones o reemplazos (incluidos los tornillos). Asegúrese de que la máquina está desconectada antes de comenzar cualquier trabajo de mantenimiento (reparaciones, resolución de problemas, etc.)

  • Seite 12: Mesures De Securite

    Malgré le fait que les informations contenues dans ce manuel soient données de bonne foi et étaient actualisées au moment de leur impression, NAMCO EUROPE LIMITED se réserve le droit de procéder à des changements ou à des modifications sans avis préliminaire.
  • Seite 13 Ne pas apporter de modifications sur cette machine sans autorisation préalable, faute de quoi cela pourrait entraîner un danger. Seules les pièces détachées Namco Europe Ltd. doivent être utilsées pour le remplacement ou la réparation de pièces (y compris les vis) S’assurer que l’interrupteur soit sor OFF avant de commencer tout travail de maintenance (localisation...

  • Seite 16: Considerazioni Generali Sulla Sicurezza

    Quest macchina deve essere usata solo in interni e deve essere usata solo per gli scopi per cui è progettata. Namco Europe Ltd non si assume responsabilità per incidenti, ferite o damni risultanti da cambiamenti non autorizzati o da uso improprio della macchina.
  • Seite 17 Quando si rimpiazza o si riparano delle parti (incluse le viti) si possono usare solo parti approvate dalla Namco Europe Ltd. Assicurarsi che la macchina sia SPENTA prima di incominciare qualsiasi lavoro di manutenzione (guasti, riparazioni etc.) Se state per iniziare un lavoro non descritto in questo manuale, contattate il vostro distributore per instruzioni poichè...

  • Seite 18: Vanlige Sikkerhetstiltak

    NAMCO EUROPE LIMITED. Da informasjonen i denne manualen er gitt i god tru og var korrekt da den ble utgitt, tillegger NAMCO EUROP LIMITED seg retten til å lage forandringer uten varsel.
  • Seite 19 Installasjon, service, justering eller rutine vedlikehold skal bare utføres av kvalifiserte personer. Ikke lag noen forandringer på denne maskinen uten godkjenning. Dette kan medføre uforutsette farer. Bare deler spesifisert av Namco Europe Ltd. skal benyttes ved utskifting eller reparasjon av deler (dette gjelder også skruer).

  • Seite 20: Algemene Veiligheidsoverwegingen

    Namco Europe Limited. Ofschoon de informatie in deze handleiding in goed vertrouwen is gegeven en nauwkeurig was ten tijde van het drukken, houdt Namco zich het recht voor om veranderingen en aanpassingen te maken zonder bericht.
  • Seite 21 Maak geen veranderingen aan deze machine zonder goedkeuring vooraf. Dit kan onvoorzien gevaar opleveren. Alleen onderdelen die door Namco Europe Ltd. zijn gespecificeerd dienen gebruikt te worden bij het vervangen of repareren van onderdelen (incl. schroeven). Zorg ervoor dat de machine UITgeschakeld is voordat er enig onderhoudswerk wordt verricht (troubleshooting, reparaties etc.)

  • Seite 22: Avisos De Segurança

    NAMCO EUROPA LIMITADA. A informação contida neste manual foi fornecida de boa fé, sendo rigorosa na altura da sua publicação. A NAMCO EUROPA LIMITADA, reserva-se o direito de proceder a mudanças e alterações sem qualquer aviso prévio.
  • Seite 23 A substituição ou reparação de peças deverá ser feita apenas com peças de origem ou especificadas pela “Namco Europa Ltd.” (incluindo parafusos) Certifique-se que a maquina se encontra desligada sempre que iniciar qualquer tipo de trabalho de manutenção.

  • Seite 24: Säkerhetsanvisningar

    återvinningssystem, översändas eller på annat sätt kopieras för offentlig eller privat användning, utan tillstånd från NAMCO EUROPE LIMITED. Eftersom informationen i denna manual lämnas ut i god tro och var korrekt när den trycktes, reserverar sig NAMCO EUROPE LIMITED för ändringar.
  • Seite 25 Gör inga ändringar på denna maskin utan ett godkännande i förväg. Detta kan förorsaka oförutsägbar fara. Endast delar som är specificerade av Namco Europe Ltd. ska användas vid utbyten eller reparation av delar (inklusive skruvar). Försäkra dig om att strömmen är avstängd innan underhållsarbete påbörjas (felsökning, reparationer etc.)

  • Seite 26: Yleiset Turvallisuusnäkökohdat

    Tästä julkaisusta ei saa ottaa missään muodossa kopioita yksityis- tai julkiseen käyttöön ilman NAMCO EUROPE LIMITED:in lupaa. Tässä ohjekirjassa olevat tiedot pitävät julkaisuhetkellä paikkansa. NAMCO EUROPE LIMITED:illä on kuitenkin oikeus muutoksiin ilman erillistä ilmoitusta. Tämä laite on valmistettu EC direktiivien mukaisesti. Se on testattu ja todettu noudattavan seuraavia direktiivejä: 89/336/EEC ja 72/23/EEC (EN55014, EN55104 ja EN 60335-1 standardit).
  • Seite 27 Tälle laitteelle ei saa tehdä mitään hyväksymättömiä muutoksia. Se voi aiheuttaa ennalta-arvaamattomia vaaroja. Vain Namco Europe Ltd:n määrittelemiä varaosia saa käyttää vaihtaessasi tai korjatessasi osia. (sisältäen ruuvit). Varmista, että laite on kytketty POIS PÄÄLTÄ ennen työn aloittamista.

  • Seite 28: Inhaltsverzeichnis

    Contents Operators Manual ......................1 PORTABLE APPLIANCE TESTING ................3 GENERAL SAFETY CONSIDERATIONS ............... 4 ALLGEMEINE SICHERHEITSHINWEISE ..............6 GENERELLE SIKKERHEDSOVERVEJELSER .............. 8 CONSIDERACIONES GENERALES DE SEGURIDAD..........10 CONSIGNES GENERALES DE SECURITE ..............12 ΕΞΕΤΑΣΗ ΓΕΝΙΚΗΣ ΑΣΦΑΛΕΙΑΣ CONSIDERAZIONI GENERALI SULLA SICUREZZA ..........16 VANLIGE SIKKERHETSTILTAK ...................

  • Seite 29: Specifications

    1. SPECIFICATIONS POWER SUPPLY:- 230volts / 450watts AC AMBIENT OPERATING +5°C to +25°C TEMPERATURE: MONITOR:- Pioneer 50” Projector Monitor COIN ACCEPTOR:- Mars CashFlow 4 Channel - Dispense DIMENSIONS:- Assembled 1500(w) x 1510(d) x 2090(h) Monitor Cabinet 1500(w) x 790(d) x 1730(h) Coin Tower 1100(w) x 720(d) x 1110(h)

  • Seite 30: How To Play

    2. HOW TO PLAY This is a gun shooting game where players press on a foot pedal to hide behind an object to avoid an enemy attack, then release the pedal to get out from behind the object and attack the enemy. HOW TO CONTROL Step on the pedal = attack position.

  • Seite 31: Major Components

    3. MAJOR COMPONENTS Page 31...

  • Seite 32: Moving The Machine

    4. MOVING THE MACHINE This machine is fitted with castors to make it easier to move. Take care when moving the machine on an inclined surface. The overall height of the machine is 2310mm. Take care of any overhead obstructions. (e.g. Light Fittings, Electric Cables etc.) When moving the game, ensure that the game is dis-assembled into 4 parts: Monitor Assemblies, Coin Tower, and Header Assembly.

  • Seite 33: Das Gerät Darf An Folgenden Plätzen Nicht Aufgestellt Werden

    This machine is designed for INDOOR USE ONLY. Do not install in the following places. Outdoors Direct Sunlight, places with excessive humidity or dust, places where there is water leakage, near air-conditioning or heating equipment, places with excessive heat or cold temperature. Places where it would be in the way of emergency exits or fire extinguishing equipment.
  • Seite 34 CETTE MACHINE EST DESTINEE UNIQUEMENT A UN USAGE INTERIEUR NE PAS INSTALLER LA MACHINE DANS LES ENDROITS SUIVANTS A l’extérieur. Directement exposée au soleil, aux endroits excessivement humides ou poussiéreux, aux endroits où il y a des risques de fuite d’eau, près de ventilateurs ou source de chaleur, aux endroits très chauds ou froids.
  • Seite 35 DEZE MACHINE IS ALLEEN VOOR GEBRUIK BINNENSHUIS ONTWORPEN INSTALLEER DE MACHINE NIET OP DE VOLGENDE PLAATSEN Buiten In direct zonlicht, op plaatsen met een zeer hoge vochtigheidsgraad of met veel stof, op plaatsen waar een waterlek is, dichtbij airco’s of verwarmingsapparatuur, op plaatsen met een zeer hoge of koude temperatuur.

  • Seite 36: Joining The Monitor (L) And (R) Assemblies

    5-1 Joining the Monitor (L) and (R) Assemblies Place the monitor (L) and (R) assemblies together in their final location and lower the eight, (4 on each monitor), level adjusters until the castors are raised approx 5mm from the ground. NOTE:- When adjusting the level adjusters, ensure that the top and front faces of the monitor assemblies are level with each other.
  • Seite 37 Fit the joint bracket with the supplied 4off flange socket head screws (M8x20) Fit the supplied 4off flange socket head screws (M8x40) to the front of both monitor (L) and (R) assemblies finger tight, leaving a clearance of approx. 5mm. Page 37...
  • Seite 38 Fit the joint assy, (shipped with Header Assy), to the monitors and tighten the 4off flange socket head screws (M8x40). Pull the loom connectors from the monitor assemblies. Page 38...

  • Seite 39: Fitting The Header Assembly

    5-2 Fitting the Header Assembly The Header Assembly has a forward centre of gravity, so it is important that at least two people are used to fit or remove the Header Assembly. The fitting position of the Header Assembly is very high, and it is important that a means of reaching the height safely, without stretching, is available.

  • Seite 40: Fitting The Coin Tower

    5-3 Fitting the Coin Tower Place the coin tower up to the Joint Assy. Fit the supplied 4off flange socket head screws (M8x20) to fix the Coin tower to the Joint Assy. Pull the harness out from the coin tower. Connect the six connectors.

  • Seite 41: Fitting The Pedal Assembly

    5-4 Fitting the Pedal Assembly Connect the connector between the pedal assy and coin tower assy. Slacken the Flange socket head screws (M6x20) retaining the pedal brackets. Place the pedal assy between the pedal brackets and fit, finger tight, the supplied 4off flange socket head screws (M5x12) taking care not to trap any wires.

  • Seite 42: Adjustments

    6. ADJUSTMENTS Adjustment or maintenance on this machine should be carried out by qualified personnel only. Aufstellung, Service, Einstellung und Wartung dürfen nur von dafür qualifiziertem Fachpersonal durchgeführt werden. Justeringer eller vedligehold af denne maskine bør kun udføres af kvalificeret personale. Los ajustes y el mantenimiento de esta máquina deben ser realizados sólo por personal cualificado.

  • Seite 43: Adjustment Switches

    6-2 Adjustment Switches The Adjustment switches are located inside the coin door. Service Switch. Press this switch to obtain game credits without incrementing the play meter. Test Switch Slide the test switch ON to enter test mode. Test mode allows testing and the changing of game settings. (Refer to section 6-3 "Test Mode"...

  • Seite 44: Test Mode

    6-3 Test Mode Open the coin door and slide the test switch “ON”. The “Menu Screen” will be displayed on the monitor. Select the test required by using the select up/down switch. The colour of the selected test will change. Activate the test by pressing the Enter switch.

  • Seite 45: Coin Options

    6-3-1 Coin Options Select “COIN OPTIONS” on the menu screen to set the game cost and related settings. The following screen is displayed. Use the Select Up/Down switch to choose the required item then press the Enter button. Use the Up/Down switch to change the setting. Press the Enter button after the changes have been made to return to the options.

  • Seite 46: Game Options

    6-3-2 Game Options Select “GAME OPTIONS” on the menu screen to set the game variables. The following screen is displayed. Use the Select Up/Down switch to choose the required item then press the Enter button. Use the Up/Down switch to change the setting. Press the Enter button after the changes have been made to return to the options.

  • Seite 47: I/O Test

    6-3-3 I/O Test Select “I/O TEST” on the menu screen to switches and lamps. The following screen is displayed. Use the Select Up/Down switch to choose the required item then press the Enter button to enter the test. Select “EXIT” and press the Enter button to return to the menu screen. I/O TEST DIP 4 12345678 [ON:OFF]...

  • Seite 48: I/O Pcb Check

    DIP 4 12345678 [ON:RED] LINK ON 2 I/O PCB CHECK Master TX 3536 NAMCO LTD. Time Crisis 2 ; Ver1.00 ; JPN 1/0 PCB Connect OK namco ltd. TSS-I/O;Ver2.02;JPN;GUN-EXTENSION EXIT SELECT SW : CHOOSE ENTER SW : ENTER Page 48...

  • Seite 49: Gun Initialize

    6-3-3-2 Gun Initialize Select ‘GUN INITIALIZE’ from the I/O Test Screen. The following screen is displayed:- GUN INITIALIZE GUN INITIALIZE (CRT) ...... (a) GUN INITIALIZE (PROJECTOR) ...... (b) EXIT SELECT SW : CHOOSE ENTER SW : ENTER Use the Up/Down switch to select ‘GUN INITIALIZE (PROJECTOR)’, and press the Enter switch.
  • Seite 50 AIM AT CENTER OF THE CROSS AND PULL GUN TRIGGER The gun aim is set by aiming and shooting at three points on the screen: the middle, top and bottom. While the above screen is displayed, aim at the centre of the cross displayed in the middle of the screen.
  • Seite 51 AIM AT CENTER OF THE CROSS AND PULL GUN TRIGGER While the above screen is displayed, aim at the centre of the cross displayed at the bottom of the screen. After firing the gun aiming is now set, and the screen will return to the original ‘Gun Initialize’ screen.

  • Seite 52: Switch Test

    6-3-3-3 Switch Test Select “Switch Test” on the I/O menu screen to test the switches. The following screen is displayed. The display shows the current state of the switches. Press the Up Select switch and the Enter switch together to EXIT and return to the I/O menu screen SWITCH TEST DIP 4 123456787 [ON/OFF]...

  • Seite 53: Solenid Test

    6-3-3-4 Solenid Test Select “solenoid Test” on the I/O menu screen to test the switches. The following screen is displayed. I/O TEST DIP 4 12345678 [ON:RED] ON 2 LINK SOLENOID TEST PULL GUN TRIGGER TO ACTION EXIT SELECT SW : CHOOSE ENTER SW : ENTER The gun recoil solenoid will operate each time the trigger is pressed.

  • Seite 54: Monitor Test

    6-3-4 Monitor Test Select “MONITOR TEST” on the menu screen to test and adjust the Monitor. The following screen is displayed. Use the Select Up/Down switch to choose the required item then press the Enter button. To return to the Monitor Test Menu from a test pattern press the Enter button.

  • Seite 55: Sound Test

    6-3-5 Sound Test Select “I/O TEST” on the menu screen to switches and lamps. The following screen is displayed. Use the Select Up/Down switch to choose the required item then press the Enter button. Use the Up/Down switch to change the setting. Press the Enter button after the changes have been made to return to the options.

  • Seite 56: Ads Data

    6-3-6 ADS Data By selecting ADS Data from the menu screen, all of the bookkeeping details can be read and/or reset. 6-3-7 Others Select “OTHERS” on the menu screen. The following screen is displayed. Use the Select Up/Down switch choose the required item then press the Enter button.

  • Seite 57: Removing And Replacing Assemblies And Parts

    7. REMOVING AND REPLACING ASSEMBLIES AND PARTS 7-1 Removing the Monitor from the Monitor Base The monitor is heavy. approx 100kg At least five (5) people are required to remove the monitor. Remove the 4off pozi head screws (M5x35) and remove the front cover. Disconnect the two connectors and then remove the 2off hex head screws (M10x130), spring washers and square flat washers Page 57...
  • Seite 58 Remove the 2off pozi head screws (M5x30) and remove the cover strip. Remove 2off pozi head screws (M5x30), unlock and remove the rear door. Remove the 2off hex head screws (M10x130), spring washers and square flat washers. Lift the Monitor approx 10cm from the monitor base and then move it forwards or backwards clear of the monitor base.

  • Seite 59: Replacing The Fluorescent Tube Or Starter

    7-2 Replacing the Fluorescent Tube or Starter Remove 4off tork screw (M5x15) and remove the top retaining bracket and header acrylic. Replace the fluorescent tube or starter. Refit the header acrylic and top retaining bracket. Page 59...

  • Seite 60: Replacing The Pedal Switch

    7-3 Replacing the Pedal Switch Remove 4off security screw (M5x12) and remove the switch cover plate. Remove 2off pozi head screw (M3x16) and remove the switch. When replacing the switch, ensure that the wires are fitted to the correct terminals. Slacken the 2off whizztite nuts (M4) and adjust the microswitch bracket so that the switch plunger operates the switch correctly without bending the switch lever against the switch body.

  • Seite 61: Greasing The Pedal Assy Plunger

    7-4 Greasing the Pedal Assy Plunger Remove 4off security screw (M5x12) and remove the switch cover plate. Remove 2off whizztite nuts (M4) and remove the switch. Remove 4off whizztite nuts (M4) and remove the plaunger assembly. Note: The plunger is spring loaded. Keep the plunger pressed in when removing the assy and release the plunger slowly.

  • Seite 62: Replacing The Pedal Plunger

    7-5 Replacing the Pedal Plunger Remove the plunger assembly. (See 7-4 page 61) Pull the plunger out of the holder. Replace with the new plunger. (The new plunger should have grease applied all over prior to fitting). Wipe off any old grease and dirt from the pedal plate and regrease. Reassemble in reverse order.

  • Seite 63: Gun Assembly

    7-6 Gun Assembly 7-6-1 Replacing the Gun Assembly Remove 8off security screws (M8x20) and remove the gun pod complete with the gun. Disconnect the connectors and remove the 2off whizztite nuts (M6). Remove the gun assembly from the gun pod. Note: When replacing the gun assembly ensure that the earth wires are located on to the studs before fitting and tightening the whizztite...

  • Seite 64: Removing The Gun Slide

    7-6-2 Removing the Gun Slide Remove 4off cap screws (M3x10), 1off button screw (M4x25), and 1off hex nut (M4), and detach the gun slides (L) and (R). Reassemble in reverse order. Page 64...

  • Seite 65: Removing The Gun Cover

    7-6-3 Removing the Gun Cover Remove the gun slides (L) and (R). (See 7-6-2 page 64) Place the gun (L) face down, and remove the 4off button screws (M4x10), 1off button screw (M4x25), 4off hex nuts (M4), and 1off cap screw (M3x10).

  • Seite 66: Replacing The Solenoid

    7-6-4 Replacing the Solenoid Remove the gun cover and gun slide (R). (See 7-6-2 page 64 7-6-3 page 65) Disconnect the solenoid connector. Remove 1off cap screw (M3x10) on the gun cover (L) and remove the solenoid bracket. Remove 1off cup screw M (M3x8) and detach the earth wire. Loosen the nuts (16mm dia.) and remove the solenoid.

  • Seite 67: Replacing The Trigger Switch

    7-6-5 Replacing the Trigger Switch Remove the gun cover and gun slide (R). (See 7-6-2 page 64 7-6-3 page 65) Replace the microswitch. Take care when replacing the switch that the correct wires are fitted to the correct terminals. Reassemble in reverse order. 7-6-6 Replacing the Flexible Gun Conduit.

  • Seite 68: Parts

    8. PARTS Page 68...
  • Seite 69 e t I i r c " 0 e l l Page 69...
  • Seite 70 e t I i r c c i l c i l ’ 4 ’ 4 ‰ " Page 70...
  • Seite 71 i f i l i f i … " … " ‰ " … " Page 71...
  • Seite 72 Page 72...
  • Seite 73 e t I i r c l i a i l e i l e Page 73...
  • Seite 74 Page 74...
  • Seite 75 e t I i r c d i l d i l d i l d i l d i l l i a p i l d i l d i l d i l d i l d i l c t i e l i Page 75...
  • Seite 76 e t I i r c c t i Page 76...
  • Seite 77 e t I i r c c t i c t i d i l c t i Page 77...

  • Seite 78: Schematics

    9. SCHEMATICS Page 78...
  • Seite 79 Page 79...
  • Seite 80 Page 80...
  • Seite 81 Page 81...

Inhaltsverzeichnis