500300 Rev. U
Operating Instructions
3-3
Test #
(341X)
Test #
(340X)
Test Name
Comments
1
1
+5 V
Check the +5 volt supply
2
2
±15 V
Check both the +15 and -15 volt
supplies
3
3
±6 V
Check both the +6 and -6 volt
supplies
4
4
+22 V (Line Voltage)
Check the +22 volt supply; may fail
due to low line voltage.
5
5
Motion Communication Test
Check comm. link between Motion
and WREX PCBAs.
6
6
Verify Motion CPU Checksum
Motion PCBA microprocessor sanity
test
7
7
Check Drive Temperature
Check for over-temperature condition
8
8
Verify WREX CPU Checksum
WREX PCBA microprocessor sanity
test
9
N/A
Read Self Test
1
Read circuitry self-diagnostics
10
N/A
Read DSP Comm. Test
1
Check comm. link between WREX
and Read
microprocessor
11
N/A
Verify Read DSP Checksums
1
Read PCBA microprocessor sanity
test
12
9
Write DSP Communications
Test
Check communications link between
WREX and Write microprocessor
13
10
Verify Write DSP Checksums
Check Write DSP sanity
14
11
Write D/A Converter Test
Check write voltage generation
circuit
15
12
Write Power Test
Check for correct write current
16
13
Read Threshold D/A Conv. Test
Check read threshold generation
circuit
17
14
SCSI Communications Test
2
Check communications link between
WREX and SCSI microprocessor
18
15
Verify SCSI Checksum
2
Check SCSI chip, DMA chip, RAM,
and SCSI data buffer
19
16
Invoke SCSI Self-Tests
2
NOTES:
1
These tests are performed only on 341X models.
2
These tests are performed only on SCSI models.
Table 3-1 Power Up Self-Disgnostic Tests
3.3
Loading a Tape
Before loading a tape, remove the dust protector from the reel and check to see if a
write-enable ring is installed in the bottom of the reel. You will not be able to write
on the tape unless the write-enable ring is installed. See Figure 3-3.
