M3SR Series 4100 Scheduled Maintenance
7.2 Operating Manual 6175.4760.02 – 01
7.1 Scheduled Maintenance
It is mandatory to readjust the oscillators (temperature-compensated crystal oscillators
and oven-controlled crystal oscillator, part of synthesizer) one year after the radio was
first put into operation. Only this can guarantee that the specification is met. How to do
this is described in the relevant Service Manual.
The backup battery (part of motherboard) needs to be replaced once every five years
after installation. How to do this is described in the relevant Service Manual. The date of
battery replacement must be noted on the label (1, Figure 7.1) provided for this purpose
(use e.g. waterproof pen).
Figure 7.1 Label, e.g. XK 4115: Date of Battery Installation
1Label
ICN-4D-C-231000-R-D0894-00091-A-01-1
1
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