If the test of the entire printer chain fails, you must determine exactly which component is at fault. To isolate the error, perform the test one time for each piece of equipment. For example, if you have two channel printers, run the test three more times: once for each of the printers and once for the daisy-chain A set of devices (such as printers) connected in series. cables. Run the test with the test plugs installed on the first printer, run the test again with the test plugs installed on the daisy-chain cables, and then run the test with the test plugs installed on the second printer.
If the test fails at any stage, you will know exactly which device in the chain is at fault. For example, if the test passes when you connect the test plugs to the first printer but fails when you connect the test plugs to the daisy-chain cables, the daisy-chain cables are faulty. Correct the problem by repairing or replacing the faulty equipment. Then test the new equipment by attaching the test plugs to it and running the test again. Remember to continue the test for the rest of the components in case more than one device is faulty. Complete the following steps to isolate the error.
Bent pins on the cable’s Bus & Tag plugs or the printer’s
connectors In hardware, couplers used to join cables
or to join cable to devices.
can cause the test to fail. If the test fails, check the plugs and connectors
and straighten any bent pins.
After isolating and resolving the error, you
must start the Windows
spooler service.
Complete the following steps to test the first printer in the chain. The following diagram shows how to connect the cables and test plugs.
Remove the test plugs from the last printer.
Disconnect To break a communications link. the daisy-chain cables from the first printer.
Connect the test plugs to the first printer’s Bus Out and Tag Out connectors.
Run the test. If the test passes, go to the next test step. If the test fails, contact Barr Technical Support or your printer vendor for assistance and then repeat the test after you correct the problem.
To test the first printer in the chain, install the test plugs on the first printer.
Complete the following steps to test the first set of daisy-chain cables. The following diagram shows how to connect the cables and test plugs.
Remove the test printer.
Reconnect the daisy-chain cables to the first printer’s Bus Out and Tag Out connectors.
Disconnect the daisy-chain cables from the second printer and connect the test plugs to the free end of the daisy-chain cables.
Run the test. If the test passes, go to the next step. If the test fails, contact Barr Technical Support or your printer vendor for assistance and then repeat the test after you correct the problem.
To test the daisy-chain cables, install the test plugs on the daisy-chain cables.
Complete the following steps to test the next printer in the chain, as illustrated in the following diagram.
Remove the test plugs from the daisy-chain cables.
Re-attach the daisy-chain cables to the second printer’s Bus In and Tag In connectors.
Remove the terminator plugs Parts that end the cable paths on computer systems. The terminator plug is attached to the last device in a series. from the second printer.
Connect the test plugs to the second printer’s Bus Out and Tag Out connectors.
Run the test. If the test passes, go to the next test step. If the test fails, contact Barr Technical Support or your printer vendor for assistance, and then repeat the test after you correct the problem.
To test the second printer in the chain, install the test plugs on the second printer.
If you have more than two printers, repeat the daisy-chain cable test and printer test for each additional printer.
When you finish the test, remember to the terminator plugs on the last printer’s Bus Out and Tag Out connectors. Note where you store the test plugs in case you need them again.