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Service Guide DOC-IT3000/4000
Chapter 4 Failure & Repair Analysis
4.4.05 Controller Board Test
· The Controller Board Test is performed by the i960 microprocessor. The primary function of this
test is to verify that the Doc-It Controller can access the onboard memory. If a failure occurs
during this test and you receive a memory bank error, you should replace that bank (if that bank is
replacable). Otherwise you must replace the entire Doc-It Controller Board. Additionally, the IRQ,
host IRQ, and DMA loopback tests are performed. The IRQ test checks that the Doc-It Controller
Board can signal the PC. If this test fails, make sure that you do not have an IRQ conflict with any
other hardware device. The host IRQ test checks that the PC can signal the Doc-It Controller
Board. The DMA test is used to check the direct memory acess ability of the Doc-It Controller
Board.
Summary of Contents for DOC-IT3000
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