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Debugging Aids for NSE
• The following table describes the various faults that might develop in NSE cards
and also the proposed solution for each case.
No.
1
RESET LED (ON
NCP) glowing Red
continuously
2
RESET LED glows
red intermittently
3
CARD FAIL LED
glows
34
Symptom
(i) EPROMs not mounted
properly
(ii) Pins of EPROMs bent or
broken
(iii) Processor not mounted
properly
(iv) PSU on NCP failed
(v) Processor in Halt state
due to address error/bus
error caused due to
short/open in address/data
bus
(i) PSU of NCP card failed
(ii) No watchdog signal to
DS12320
(i) NIO card not jacked in
properly
(ii) PSU on NIO card facility
(iii) Jumper setting on NIO
not proper
(iv) EPLDs and FPGA in NIO
not mounted properly
Chapter 6.
Possible Reasons
Action
(i) Mount the PROMs
as per release
information
(ii) Check the output
voltage at point on
NCP card (VCC
print).
(i) Noise spikes can
be seen in +5V VCC
on CRO
(ii) Check all jumper
settings on NCP card
(i) Check power LED
(DS1) on front panel
of NCP
(ii) Check jumper
settings on NIO card
C-DOT NSE
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