KROHNE IFC 020 Converter EN - Manual (Page 62)

Installation and operating instructions IFC 020 8/5
8.4 Replacement of electronics unit of signal converter
8.5 IFC 20 K and IFC 020 F: Cleaning the signal converter housing
Switch off power supply before cleaning the housing!
Clean the signal converter housing (made of polycarbonate, PC) with a cotton cloth dipped in
solvent-free mild agent only !
Switch off power source before opening the housing !
IFC 020 K and IFC 020 F IFC 020 E
Refer to Sect. 8.1 for Figs. A to G.
1)
Unscrew the 4 recessed head screws
(Fig. A), and remove transparent cover.
2) Unscrew the recessed head screw
(Fig. B) and remove the black plastic
cover.
3) Carefully pull out the green connecting
plugs (power supply and outputs,
Fig. C).
4) Unscrew the 2 recessed head screws
(Fig. D) and remove the black metal
cover.
5) Carefully pull off the blue 9-pin plug
(connection to the primary head)
(Fig. D).
6) With a screwdriver, carefully remove
the 4 metal clips (Fig. E).
7) Remove the electronics unit
from the housing (Fig. F) and detach the
ground conductor.
8) Carefully transpose DATAPROM (IC 13)
on the amplifier-PCB (see Fig. in Sect.
8.8) from the “old” and the “new”
electronic unit (Fig. G). Watch the
position of the IC 13 when putting it on.
9) Check the power supply and fuse F1 on
the new electronic unit and transpose /
replace if necessary according to
Sect. 8.3 nos. 8) and 9).
10) Reassemble in reverse order,
points 7) - 1) above.
Refer to Sect. 8.1 for Figs. 1 to 3.
1)
Unscrew the 4 recessed head
screws (S1), on the front (Fig. 1).
2) Carefully remove the plug-in unit from the
subassembly support.
3) Unscrew the 4 recessed head screws
(S2) on the front (Fig.1).
4) Remove the ribbon cable from the
display unit. For that pull up the securing
clamp (Fig. 3). Note down the position of
the contact side of the ribbun connector.
5) Unscrew the 4 recessed head screws on
the back (Fig.2) and carefully pull the
electronic unit out of the cassette,
together with the back.
6) Carefully transpose DATAPROM (IC 13)
on the amplifier-PCB
(see Fig. in Sect. 8.9) from the “old”
and the “new” electronic unit .
Watch the position of the IC 13
when putting it on.
7) Check the power supply and fuse F1 on
the new electronic unit and transpose /
replace if necessary according to
Sect. 8.3 nos. 6) and 7).
8) Reassemble in reverse order,
points 5) - 1) above.