Avery Berkel CX20 SERIES, Service Manual

Page: 210 / 353

20 — Label and Receipt Printer
20–10 CX20/CX30/CX34 Service Manual
20.3.10 Changing the photodetector
To change photodetector, proceed as follows:
1 Remove printer as detailed in Sections 20.3.1 and 20.3.3, as
appropriate.
2 Detach stepper motor from printer spine (refer to Section 20.3.7): there
is no need to cut the cable tie.
3 Remove paper cassette by setting print head arm upwards (so lifting
print head) and pulling cassette outwards.
4 Remove photodetector and bracket by removing nut (with integral
shakeproof washer) from bracket, then removing the screw with
shakeproof and plain washers, from the nut which is attached to the
spine: photodetector and bracket are now free.
5 Cut the cable tie securing the photodetector loom to the stand–off pillar.
6 Withdraw photodetector complete with flying connector by pulling
through aperture in printer spine.
7 Insert new photodetector in aperture in printer spine.
8 Fit bracket to printer spine by positioning over stud (in printer spine) and
securing with nut with integral shakeproof washer.
9 Locate new photodetector over stud in printer spine and secure to
bracket with screw and shakeproof and plain washers: this also helps to
secure bracket to spine.
10 Attach the photodetector loom to stand–off pillar (adjacent to slot) with
a cable tie.
11 Attach stepper motor to printer spine (refer to Section 20.3.7).
12 Fit printer as detailed in Sections 20.3.2 and 20.3.4, as appropriate.
13 Fit paper cassette (push–fit) and secure by setting print head arm
downwards (so setting print head).
14 When installed in a unit, adjustment of photodetector must be checked
by printing a variety of tickets and labels.
20.3.11 Changing the printer mechanism
Caution
When pulling out printer head mechanism, be careful to
keep the print head away from the roller and thrust
bearing.
To change the printer mechanism (head, case and rollers, but excluding motors),
proceed as follows:
1 Remove paper cassette by setting print head arm upwards (so lifting
print head) and pulling cassette outwards. Print head is to remain lifted
throughout following procedure.