M2000-00
Introduction To Servicing
3.5
Copyright TEL 31/10/96
3.2 Disassembly Instructions
Caution:
To carry out alignment it is necessary to remove only the top cover (1) and
logic PCB retaining screws (3). It is essential that the bottom cover (13) and
microprocessor shield (5) with its three retaining screws (4) are torqued
down as specified in Figure 3.3.
Caution:
Various electronic components within the radio can be damaged by elec-
trostatic discharge. A properly grounded earth mat and wrist strap should
be used at all times (refer to Section 3.1.4).
3.2.1 To Gain Access To The Logic PCB
Refer to Figure 3.3.
Remove the top cover (1) by unscrewing the four bottom cover screws (14).
Remove the three logic PCB retaining screws (3).
It should now be possible to open out the logic PCB (2), giving access to both sides
of the logic PCB, and access to the RF PCB (11) tuning points, audio, plug-in
TCXO PCB and loop filter components.
3.2.2 To Remove The Bottom Cover And Microprocessor Shield
Refer to Figure 3.3.
Remove the top cover and logic PCB screws as instructed in Section 3.2.1, then
remove the three microprocessor shield retaining screws (4).
Remove the screw securing the earthing wire from the control head to the micro-
processor shield.
It should now be possible to lift off the microprocessor shield (5) and the bottom
cover (13).
This will give access to both sides of the RF PCB and IF PCBs, and enable the con-
trol head to be removed.
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