2 — General and Technical
2–12
CX20/CX30/CX34 Service Manual
The rear housing houses a main PCB, A/D PCB and customer display PCB. A
customer display screen is fitted externally towards the bottom of the rear
housing.
The printer assembly is fitted to both sides of a vertical printer spine which is
fitted to the chassis towards the right–hand side of the unit. A bracket, fitted to
the front of the printer spine, along with the chassis, printer door and printer
spine itself, form a printer compartment at the right–hand side of the unit. In this
compartment are: print head assembly, paper sensor and cassette locating bars
(label machines only), mains ON/OFF switch, operator keyswitch and DCU
connector. On the left–hand side of the spine are fitted the printer drive motors.
The printer door is held shut by magnets.
The suspension assembly, which incorporates the transducer assembly,
supports the cradle assembly and scoop. The top of the suspension assembly
(mounting boss) is secured to the top of the chassis. The bottom of the
assembly protrudes through a hole in the base of the unit; the cradle assembly
hooks over this.
The power supply PCB is fitted to four pillars attached to the left–hand side of
the chassis. It is secured with two screws (adjacent to left–hand side of unit)
and two hexagonal support pillars. An aluminium RFI cover (complete with
warning label) fits over the PCB and is secured to the two hexagonal pillars. It
has slits in its sides for ventilation and slots and cut-outs in its bottom edges for
cables and looms. Cables are protected by rubber rings when passing through
the slits in the aluminium cover and chassis.
The vendor display PCB is fitted over the aperture inside the front housing. It is
fixed to two narrow vertical brackets which, in turn, are fitted to four pillars (two
per bracket) which support it proud of housing.
The keyboard, which has 80 keys, is fitted to the outside of the front housing in
a specially moulded recess just below the display aperture. An operator’s
overlay is adhered to the front of the keyboard; in front of this is a transparent
sheet held in position by two rubber strips above and below the keyboard. The
transparent sheet protects the overlay and also holds in position a programming
overlay (supplied loose) as it is only fixed to the keyboard along its bottom edge.
The main PCB is fitted to the back of the chassis on four pillars, component side
outermost. A rectangular hole in the PCB allows looms to be passed through to
the other side of the unit, via a circular hole in the chassis. The main PCB has
four pillars on the component side for securing the A/D PCB; each pillar has an
internal, flexible barb for locking the A/D PCB in place.
The A/D PCB is fitted towards the top of the main PCB. It clips into a connector
on the main PCB and is held in place by the four pillars.
The customer display PCB is fitted to the inside of the rear housing. Its fixing is
similar to that of the vendor display PCB.
At the top of the unit, moulded into the front and rear housings, is a raised
section which is approximately 50 mm proud of the main unit. Cut–outs in the
top of the section allow the mounting boss to pass through it and give access to
the ISC and Host/Master connectors and mains input socket which are fitted to
the top of the chassis.
Содержание CX20 SERIES
Страница 133: ...11 Main PCB 11 4 CX20 CX30 CX34 Service Manual Figure 11 1 Main PCB Electrical Connections See Tables 11 1 and 11 2 ...
Страница 137: ...11 Main PCB 11 8 CX20 CX30 CX34 Service Manual Figure 11 2 Main PCB DIL Switches and Potentiometers ...
Страница 246: ...25 Appendices 25 9 CX20 CX30 CX34 Service Manual 1 Voids printed on receipt 2 Voids not printed on receipt ...
Страница 258: ...PL 1 CX20 CX30 CX34 Service Manual Section PL Parts List ...
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Страница 317: ...Addendum A Phase 1 4 and CX34 Parts List A 30 CX20 CX30 CX34 Addendum A ...
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Страница 323: ...Contents B 2 Addendum B ...
Страница 343: ...Addendum B Phase 1 5 1 5 3 and New Main PCB B 22 Addendum B ...
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Страница 351: ...PL Parts List Devlin Keyboard C 6 Addendum C ...
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