Service Manual

GSM-205-523
Digital module replacement (MCUF, NIU, FMUX, BPSM, Alarm)
31st Oct 01
Maint. 2–32
Maintenance Information: Horizon macro indoor
CONTROLLED INTRODUCTION
68P02902W09-B
Digital module replacement (MCUF, NIU, FMUX, BPSM, Alarm)
Introduction to
digital module
replacement
CAUTION MCUF removal during flash memory programming may
result in bootcode corruption. This is only repairable by
returning the MCUF to Motorola. For this reason, the
MCUF should not be removed while the code load is
taking place, indicated by a flashing LED.
A faulty master MCUF, FMUX or BPSM will cause a redundant module (if fitted)
to take over until the faulty module is replaced. Faulty MCUF, FMUX and BPSM
modules can be hot swapped without harm to the module or effect on normal
operation, provided the equivalent redundant module has taken over.
Removal of a faulty digital module that has not had its function taken over by a
redundant module, and is still partially functional, will affect service. Inform the
OMC-R before replacing out such modules.
Diagram of
digital modules
Figure 2-13 shows the location of modules within the digital module shelf.
ig.322.rh
ALARM
MODULE
NIU B0
NIU B1
BPSM
BPSM
FMUX
FMUX
MCUF A
MCUF B
NIU A0
NIU A1
REDUNDANT (B)
MASTER (A)
DIGITAL
MODULE SHELF
Figure 2-13 Digital and BPSM module locations, including optional redundancy