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Diagnostic Test 12 (Loop back Isolation Sequence)
This sequence starts all interface, buffer-initiated, and formatting-circuitry-initiated
loop back isolation sequences. All hardware areas used by loop backs will be
checked out. Each loop-back test is stepped through and a loop back problem
should be isolated. Each test will be started with a loop back check number (param-
eter A) of zero and will run all loop back checks.
The sequence:
Diagnostic Test 13 (Drive Controller Power-On Test Sequence)
This sequence is started by the drive controller at power on to check out all paths
and operation of the servo and motor drive circuits.
The sequence:
Diagnostic Test 14 (Buffer Controller Power-On Test Sequence)
This sequence is started by the buffer controller at power on and checks all paths
and operation of the buffer circuits.
The sequence:
Tect I S
P -
1
8-4
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Service Information
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