Troubleshooting (MSO/DPO5000 Series)
apredefined thr
eshold in a specific amount of time. (See Table 4-19 on
page 4-51.)
Example 1: A se
ries of four flashes with a period of 500 ms and a
four-second pause before the four flashes repeat indicates that the +3.3 V
DC/DC converter had an output voltage that went out of tolerance. To
protect the system, all supplies would have been shut down as a result
of this fault.
Example 2: A series of seven flashes with a period of 500 ms and a
four-second pause before the seven flashes repeat indicates that the
internal VPI probe 12 V current limit was exceeded.
Table 4-1
8: DS10 Errors by speed and duration
Period LED “On” time
Delay before flash pattern
is repeated
Error
number Error type
00
LED always on. No flashes.
0 Microcontroller code is
corrupt. Internal CRC
verific
ation failed.
2s 1s 16s 1
Startu
p or shutdown failed
or output voltage is out of
tolerance.
1 s 500 ms 8 s 2
Output voltage is high.
500 ms 250 ms 4 s 3
Output voltage is low.
Table 4-19: DS10 Errors by number of flashes, with related voltages
Number of flashes Channel
Under
(Error 3)
Low
(Error 1)
High
(Error 1 )
Over
(Error 2)
1 +12 V 9.8 V 10.8 V 13.2 V 14.4 V
2
+12 VM (switched +12 V
to COM-E module and
SATA HDD)
9.8 V 10.8 V 13.2 V 14.4 V
3 +5 V 4.1 V 4.5 V 5.5 V 6 V
4 +3.3V 2.6V 3V 3.6V 4V
6 VPI probe power
external 12 V
8.2 V 10.2 V 14 V 16.2 V
7
VPIprobepowerinternal
12 V load current
200 mA 500 mA 1.2 A 1.5 A
11 ADT7476 requested a shut down because temperature is too high
12
ADT7476 fan controller did not respond to programming
MSO70000/C, DSA70000B/C, DPO70000B/C, D PO7000, MSO5000, DPO5000 Series 4–51
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