Avery Berkel CX20 SERIES, Service Manual

Page: 168 / 353

15 — CX30 TK Machine
15–3 CX20/CX30/CX34 Service Manual
15.1 General
The CX30 TK machine is a customer self–service, label only machine. The
CX30 TK is based on the CX30 LS but has a large keyboard, in place of the
vendor keyboard, for customer self–service. The customer self–service
keyboard can be column or remotely mounted and each machine can have
either, or both together. The keyboard keys are supplied in two sizes, small and
large. On machines fitted with a single keyboard there is the option of 64 large
keys or any combination of small and large keys (128 maximum). On machines
with two keyboards the keyboards must have 64 large keys each.
On the remote version of the CX30 TK machine the customer self–service
keyboard is mounted on a stand and is connected to the machine externally via
a cable which is plugged into the machine’s DCU socket.
On the column mounted version of the CX30 TK the keyboard is fitted to the
front of the column. This version incorporates a taller column than the CX30
range of machines to accommodate the self–service keyboard which is mounted
on the vendor’s side. There are also two additional feet, fitted to a bracket at
the rear of the machine, to support the keyboard. The printer door has a key
operated lock to deny unauthorised access to the printer compartment.
Connection between machine and self–service keyboard is via internal looms
routed from the main PCB and DCU socket, up through the column and into the
back of the keyboard. The column mounted version of the CX30 TK is supplied
in kit form and is fitted retrospectively.
For the fitting instructions for the column mounted TK keyboard kit, see
Page xvii in the Overview section.
15.2 Mechanical Description
The keyboard comprises: rear moulding, keyboard controller PCB,
communications loom, keyboard assembly, earth lead, plastic keys and front
moulding.
The keyboard assembly comprises: a steel plate, switch PCB, 256 switches,
connecting loom (to keyboard controller PCB) and four pillars for securing the
keyboard controller PCB. The switches are soldered to the switch PCB. Each
switch fits through a cut-out in the steel plate and is secured at the other side of
the plate via an integral plastic clip. The connecting loom is fixed to the
left–hand side of switch PCB. The four pillars protrude from the rear of the
switch PCB adjacent to the connecting loom.
An earth lead clips onto the switch PCB and is connected to the rear moulding
securing screw.
The rear moulding, which is secured to the display column or stand by two
screws, houses the keyboard controller PCB and keyboard assembly.
The keyboard controller PCB is secured to the rear of the keyboard assembly by
four plastic pillars. Connections to the keyboard controller PCB are the
communications loom and the switch PCB loom.
On the remote keyboard the communications loom exits the customer
self–service keyboard through a hole in the bottom left–hand corner of the rear
moulding and is terminated in a D–type plug. The communications loom on the
column mounted keyboard exits the keyboard through the centre of the rear
moulding and enters the column; it then goes down through the column and into
the machine where it is connected to the main PCB and DCU socket.