2
24
4
Ser
vicing P
rocedures - Control Unit
6. Servicing Procedures - Control Unit
Due to the complexity of the product and the use of surface mount technology, the electronic
circuitry is not serviceable without specialised training and equipment.
The repairs detailed in this manual are therefore limited to replacement of certain parts in the
control unit, and replacement of probe heads only.
Fault finding is limited to checking for the presence or absence of signals around suspect
components using an oscilloscope or multimeter.
Repairs should only be undertaken by suitably skilled service personnel.
RD2 probe or sensor is not field serviceable as custom equipment is required during its
alignment.
CAUTIONS:
Th
hiis e
eq
quiipme
ent c
co
onta
aiins sta
atiic
c se
ensiitiive
e d
de
eviic
ce
es. Re
efe
er to
o
Appe
end
diix A fo
or re
ec
co
omme
end
de
ed
d a
antii-ssta
atiic
c h
ha
and
dlliing pre
ec
ca
autiio
ons.
It iis e
esse
entiia
all th
ha
at th
he
ese
e pro
oc
ce
ed
dure
es, o
or e
eq
quiiva
alle
ent, a
are
e a
ad
do
opte
ed
d
to
o a
avo
oiid
d sta
atiic
c d
da
ama
age
e to
o th
he
e c
ciirc
cuiitry.
Due
e to
o th
he
e h
hiigh
h d
de
ensiity tra
ac
ckkiing a
and
d sma
allll siize
e o
of c
co
ompo
one
ents,
e
extre
eme
e c
ca
are
e iin h
ha
and
dlliing th
he
e PCB must b
be
e ta
akke
en a
at a
allll tiime
es.
W
Wh
he
en so
olld
de
eriing, ta
akke
e c
ca
are
e to
o e
ensure
e th
ha
at th
he
e miiniimum h
he
ea
at iis
a
applliie
ed
d to
o th
he
e b
bo
oa
ard
d a
and
d iits c
co
ompo
one
ents fo
or th
he
e miiniimum tiime
e
ne
ec
ce
essa
ary to
o e
ensure
e h
hiigh
h q
qua
alliity jo
oiints. Inspe
ec
ct th
he
e a
are
ea
a a
aro
ound
d
re
epa
aiirs fo
or so
olld
de
er splla
ash
he
es a
and
d b
briid
dge
es. Re
efe
er to
o a
appe
end
diix A
fo
or d
de
eta
aiills o
of re
ec
co
omme
end
de
ed
d so
olld
de
eriing te
ec
ch
hniiq
que
es.
6.1 Control Unit Dismantling Procedure (see figs 1,2,3)
1. Remove the battery cover by depressing and sliding down and away from the unit.
2. Lift the battery out.
3. Remove the 4 small screws from the rear case half. Do not remove the larger screw in the
top centre of the pocket clip.
4. Invert the unit and carefully separate the two case halves by hinging them apart from the
base up, freeing the cable grommet from the case as necessary. Pay special attention to
the labels on the side and top edges of the unit which adhere to both case halves.
Take care not to damage the locating lugs holding the top of the case halves together.
The PCB is now visible and the following components may be replaced without any further
dismantling:
• Loudspeaker
• LCD