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ND-46550 (E) CHAPTER 4
Page 67
Revision 2.0
CHAPTER 4 TROUBLESHOOTING
This chapter describes the method for fault diagnosis and troubleshooting when maintenance personnel detected
the fault occurrence by lamp indication on DAIA, DAIB, and DAIC cards. For other system faults, refer to the
Maintenance Manual. Table 4-1 shows contents of the fault and the remedial action on each lamp status.
Table 4-1 Remedial Action on Each Lamp Status
CARD NAME LAMP STATUS FAULT CONTENT REMEDIAL ACTION
PN-DAIA (DAIA) RUN lamp is not flashing Abnormal operation of
DAIA card
➀ Reset MB switch.
(Down→Up→Down)
➁ Check setting of SW1.
1: FP No.1
2: FP No.2
3: FP No.3
0, 4-F: Not used
➂ If fault cannot be cleared,
replace card.
LINK lamp is not on Layer 2 link connection
failure between DAIA and
DAIB
➀ Check whether cable between
DAIA and DAIB is correctly
connected. (Refer to Chapter 3,
Section 2.3.)
➁ Reset MB switch.
(Down→Up→Down)
RED lamp is on PCM signal loss or Frame
Alignment signal loss
➀ Check whether cable between
DAIA and DAIB is correctly
connected. (Refer to Chapter 3,
Section 2.3.)
RMT lamp is on Remote alarm ➀ Check whether cable between
DAIA and DAIB (sending side)
is correctly connected. (Refer
to Chapter 3, Section 2.3.)