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CHAPTER 5: Troubleshooting

5. Troubleshooting

If you encounter a problem when you install or operate the SCSI Switch II,
please review this section for likely causes and what to do if you eliminate
these possibilities but the problem remains.

5.1 Common Problems

Problem 1. LEDs are not lit:

Check whether the power supply is the one supplied with the SCSI Switch II.
You can use a different power supply, but it must have a rating of 9 or 12 volts
DC, 1 amp maximum with the positive terminal on the inside of the
connector. Also, check whether the power supply is connected to a live power
outlet.

Problem 2. Branch-indicator LED flashes constantly:

This is an indication that the main bus and the formerly selected branch bus
(the branch corresponding to the number on the front-panel display) are
busy with data traffic, but a different branch has been selected (button has
been pushed to a new setting). This condition will resolve itself when, after
traffic stops for at least eight seconds, the Switch disconnects the formerly
selected branch bus and connects the new branch.

Содержание SCSI Switch II

Страница 1: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 1996 Black Box Corporation All rights reserved...

Страница 2: ...E technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail inf...

Страница 3: ...SCSI SWITCH II TRADEMARKS USED IN THIS MANUAL UL is a registered trademark of Underwriters Laboratories Incorporated All applied for and registered trademarks are the property of their respective owne...

Страница 4: ...erated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measure...

Страница 5: ...ato el ctrico debe ser montado a la pared o al techo s lo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s all a lo descrito en las in...

Страница 6: ...r una antena externa deber ser localizada lejos de las lineas de energia 16 El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado deb...

Страница 7: ...2 3 Caring for the Switch 10 3 Installation 11 3 1 Preinstallation Guidelines 11 3 2 Installing the Switch 11 4 Operation 12 5 Troubleshooting 13 5 1 Common Problems 13 5 2 Contacting Your Supplier 15...

Страница 8: ...ection Port A B or C Indicators 1 Power 3 Branch connected LEDs Connectors 1 P5 2 1 mm female power jack 4 high density 68 pin SCSI 3 Enclosure ABS plastic Operating Temperature 32 to 158 F 0 to 70 C...

Страница 9: ...ures that data transfer will not be interrupted Its compact size allows the SCSI Switch II to be set up for many different configurations 2 1 The Complete Package You should have received these items...

Страница 10: ...is no difference between the main bus and the three branches except for the way they are routed through the Switch Figure 2 1 Routing of Main Bus and Thre Branch Buses The SCSI Switch II supports the...

Страница 11: ...or extreme electrical fields Also though the Switch can withstand a lot of heat keeping it away from high temperatures will extend its life When you install the SCSI Switch II as with all computer dev...

Страница 12: ...u attach a SCSI adapter cable to the Switch you must make sure that Pin 1 on the cable s connector goes to Pin 1 on the Switch s connector 3 2 Installing the Switch To set up the SCSI Switch II on a d...

Страница 13: ...The LED for the last branch connected will light up If it blinks rapidly it s transmitting data If it stays constantly lit there is no data currently transmitting To switch branches push the button l...

Страница 14: ...or 12 volts DC 1 amp maximum with the positive terminal on the inside of the connector Also check whether the power supply is connected to a live power outlet Problem 2 Branch indicator LED flashes c...

Страница 15: ...Switch or you ve hit a SCSI bug If the communication still fails try these measures Check power to all SCSI devices Check the ID codes of all devices throughout the system and correct any conflicts O...

Страница 16: ...re and duration of the problem when the problem occurs the components involved in the problem and their SCSI ID numbers and any particular application that when used appears to create the problem or m...

Страница 17: ...ngle ended SCSI The first and last devices on a SCSI bus and only those devices should have terminators installed Thus a SCSI bus should have two terminators one at each end The SCSI Switch II acts as...

Страница 18: ...normal termination arrangement with the SCSI Switch II the wedge shapes represent terminators Figure 6 1 Normal Termaination An exception to the illustration above is the case where a branch bus may h...

Страница 19: ...tion normally found at the end of the main bus with terminators the top of each branch no farther than another few centimeters another two or three inches from the SCSI Switch II Figure 6 2 Alternate...

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