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NHM-2/5nx,ny/6/9
Troubleshooting
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Prior to any tuning the phone should be initialised:
Start Wintesla-Service-Software and
Select
Product
Open...
Select:
Product
Initialise
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Different repairs require different tuning. In general it is necessary to determine in which section the
repair was done to establish which tunings to perform. To determine if RF tuning is necessary after
repair it is important that the functionality of the repaired circuit is understood well. In case the circuit is
not fully understood it might be wise to play it safe and do RF tunings in accordance with the table
below.
In general repairs in the TX part will require tuning of "TX Power" and "TX I/Q" tuning.
In general repairs in the RX part or PLL will always require "RX Calibration" and in some cases require
AM Suppression tuning (Automatic) and RX Filter Calibration (Automatic).
Other parts interfacing to TX, RX or PLL might require tuning, but common sense should be used.
In the table below guidelines for what to tune when can be seen (if it can be ruled out that a component
will change RF performance, e.g. the microphone B200 there is no need to do any RF tuning).
Repairs affecting
component number
100-199
200-399
400-499
500-599
600-699
Full factory setting
3DJH
NHM-5
Normal Mode
RX
calibration
suppression
Yes
Yes
Yes
Yes
Yes
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PAMS Technical Documentation
Alt+p
Alt+p
Alt+I
F5
Required tuning
AM
RX filter
calibration
Yes
Yes
TX power
TX IQ
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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