Avery Berkel CX20 SERIES, Service Manual

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20 — Label and Receipt Printer
20–11 CX20/CX30/CX34 Service Manual
2 Free the printer ribbon cable loom from top of printer spine.
3 Release but do not remove print head bracket by removing three sets
of Posidrive screws and shakeproof washers.
4 Carefully remove bracket, noting position of two shafts (one
spring–loaded) which locate within bracket: bracket must be
disengaged from print head arm.
5 Remove the thin flexible washer at the end of the non–spring loaded
shaft.
6 Remove print head lever (noting its position) by unscrewing slotted
screw at spring end.
7 Carefully withdraw print head assembly, complete with two shafts, and
withdraw ribbon cable through aperture over printer spine.
8 Printer should not require further disassembly.
9 Before fitting new printer, carefully fold ribbon cable such that electrical
receptacle faces outwards from stepper motor side (red trace colour to
outside of bend): do not fold too tightly.
10 Position printer assembly over print head arm (in raised position) and
engage two shafts (one spring loaded) in applicable holes in printer
spine.
11 Feed ribbon loom through slot in top of spine.
12 Fit thin flexible washer onto spindle (non–spring loaded).
13 Engage bracket to print head arm and to two shafts of print head
assembly.
14 Secure bracket using three sets of Posidrive screws and shakeproof
washers.
15 Replace arm.
16 Secure ribbon loom to T and B connector on top of printer spine.
17 Fit paper cassette (push–fit) and secure by setting print head arm
downwards, so setting print head.
18 When installed in a unit, adjustment of print density must be checked,
and adjusted if necessary (refer to Section 20.3).