Codan NGT 2010 RF Technical & Service Manual page 731

3012—Fault finding
Advanced fault finding
It is strongly recommended that fault diagnosis be performed to board level only. If a
faulty board is identified, the complete board should be replaced.
WARNING
WARNING
What you need
You may require a multimeter and a pozi-drive screwdriver (1 point) when conducting
fault tests.
Dismantling the data modem
To dismantle the data modem for testing see
310
The following tests should only be performed by a technician familiar
with the HF Data Modem 3012.
Removing or substituting components may damage them and/or the
PCBs. In some cases, it is impossible to remove components without
destroying them.
Figure 5 and follow the procedures below.
NGT Transceiver System Technical Service Manual