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APENDIX A – REPLACING SOFTWARE EPROM
Warning. Switch off the monitor and electrically isolate it
before carrying out the following steps.
A.1 Access the Transmitter Unit – Fig. A.1
Caution. Employ normal antistatic precautions while
handling chips and PCBs.
Caution. To avoid damaging EPROM, base or PCB, it is
essential that you use an approved IC extractor in this
procedure.
For example, a PLCC Extractor, RS Stock Number:
404-727
Hinged Case
Microprocessor Unit
Open microprocessor unit –
2
see Fig. A.2.
Fig. A.1 Procedure to Open the Enclosure
A.2 Access the PCB – Fig. A.2
Undo locks and
swing open the case
1
to reveal the
microprocessor unit.
Unlock and open cover plate and
hinge out to expose captive
screws.
Unscrew captive screws and
swing front cover upwards. Lock
into position using the hinged
stay on the right hand side.
Remove processor PCB.
3
See Fig. A.3
Fig. A.2 Procedure to Access the Processor PCB
1
2
39
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