Table of Contents
Advertisement
SIEMENS
Pte Ltd
C55/2128 Level 2 Service Manual
7.3 PCB top-side
7.4 PCB bottom-side
The C55/2128 assembly concept differs from the previous models (P35 & K45
series) slightly. The C55/2128 is no longer employing the concept of "No
Screws". Instead of the previous upper & lower mounting frame to hold the PCB
and the housing together, the C55/2128 uses six screws to hold the light guide,
PCB and the mounting frame together.
As seen from the mechanical diagram, the C55/2128 also uses two other
different techniques from the previous models (P35 & K45 series). (1) The use of
a light guide on the front panel to disperse the light evenly throughout the keypad
& display area. (2) The use of a metal dome foil as keypad contact as opposed to
the carbon/metallic contact keypads used in the P35 & K45 series.
Copyright © Siemens Pte. Ltd.
All rights reserved
ICM MP CCQ ASP/ASC
Siemenes Techincal Support Center
10 of 28
Internal Service Use Only
Advertisement
Table of Contents
