11 — Main PCB
11–11
CX20/CX30/CX34 Service Manual
7
Switch on battery on main PCB (DIL switch SW4, Bit 4 to ON (1)).
8
Fit cross assembly by fitting two socket head screws attaching it to
transducer: check that arrow on cross assembly points towards front
(vendor) side of unit.
9
Fit case (refer to Section 3).
11.2.5
Removing the main PCB (CX34)
To remove the main PCB on the CX34, proceed as follows:
1
Make back–up of unit data (refer to Part 2, Programming Handbook for
use of the DCU).
2
Switch off machine and isolate it fro the mains power supply.
3
Remove front housing (refer to Section 3).
4
Gain access to the main PCB side of the chassis and remove the
A/D PCB protection plate by removing the two securing screws from the
chassis.
5
Remove the A/D PCB: disconnect the four transducer cables from
terminal block TB1 (noting their connections); compress barb on each
of the four plastic pillars which support A/D PCB and pull A/D PCB
away in straight direction, to avoid causing damage to PCB–mounted
electrical connectors.
6
Switch off battery on main PCB (DIL switch SW4, Bit 4 to OFF (0)).
7
Disconnect all cables attaching to main PCB (refer to Figure 11.1).
Connecting cables will vary according to model and specification of
individual machine.
8
Remove the four screws, one at each corner, securing main PCB to
pillars on chassis and lift main PCB away from unit.
11.2.6
Fitting the main PCB (CX34)
To fit main PCB to the CX34, proceed as follows:
1
Place main PCB on chassis pillars, one at each corner, and secure
using the four screws.
2
Connect all cables to main PCB (refer to Figure 11.1 and Table 11.1).
Connecting cables will vary according to model and specification of
individual machine.
3
Switch on battery on main PCB (DIL switch SW4, Bit 4 to ON (1)).
4
Attach A/D PCB to main PCB by fitting it over interfacing electrical
connector (PL1 on A/D PCB) and over four plastic pillars: check that
barb on each plastic pillar engages correctly. Connect the four
transducer cables to TB1.
5
Fit the A/D protection plate to the chassis using the two screws.
6
Fit front housing (refer to Section 3).
Summary of Contents for CX20 SERIES
Page 258: ...PL 1 CX20 CX30 CX34 Service Manual Section PL Parts List ...
Page 284: ......
Page 287: ......
Page 317: ...Addendum A Phase 1 4 and CX34 Parts List A 30 CX20 CX30 CX34 Addendum A ...
Page 318: ......
Page 321: ......
Page 323: ...Contents B 2 Addendum B ...
Page 343: ...Addendum B Phase 1 5 1 5 3 and New Main PCB B 22 Addendum B ...
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Page 351: ...PL Parts List Devlin Keyboard C 6 Addendum C ...
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