NRI—Fault finding
276 NGT Transceiver System Technical Service Manual
Accessing the NRI Microcontroller PCB
To gain access to the NRI Microcontroller PCB inside the NRI:
1 Access the inside of the NRI (see page 275, Accessing the inside of the NRI).
1 Remove the shielding screen by levering each corner of the screen with a
screwdriver.
The NRI Microcontroller PCB (Codan part number 08-05854-001) and its plug-in
NRI Vocoder PCB are exposed.
Accessing the NRI User Connect PCB
To gain access to the NRI User Connect PCB inside the NRI:
1 Access the inside of the NRI (see page 275, Accessing the inside of the NRI).
1 Remove the four countersunk M3 screws (Codan part number 31-03008-782)
connecting the rear panel to the chassis of the NRI.
1 Remove the single M3 taptite screw (Codan part number 31-03010-582) connecting
the rear panel to the lower cover.
1 Carefully unplug the four looms (Codan part numbers 08-05851-001,
08-05852-002, 08-05863-001, 08-05852-001) and remove the rear panel assembly
with the NRI User Connect PCB (Codan part number 08-05865-001) attached.
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