Ribbon End Sensor - Intermec EasyCoder 601 XP Service Manual

7.4 Ribbon End Sensor

Intermec EasyCoder 601 XP – Service Manual Ed. 2
Description
The ribbon end sensor is a photoelectrical device that detects
whether there is any thermal transfer ribbon in the printer or not. It
is fitted to the centre-line wall immediately behind the print
mechanism by means of a single #T10 Torx screw. The sensor
assembly consists of a sensor with cable and connector, and a
combined mirror/bracket.
Bracket
Working Principles
The ribbon end sensor works like this. A narrow beam of light is
emitted from the sensor and is either absorbed by the black transfer
ribbon, or reflected back by a mirror to a receiver in the sensor. The
firmware compares the signal from the sensor with the printer's
setup in regard of media type in order to avoid printing on the wrong
type of media:
Setup
Thermal transfer media
Thermal transfer media
Direct thermal media
Direct thermal media
The ribbon end sensor is connected to P52 on the CPU board.
Chapter 7 Transfer Ribbon Mechanism
Sensor
Mirror
Detection Error
Ribbon OK
No ribbon Error 1027 Out of transfer ribbon
No ribbon OK
Ribbon OK
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