Function and Integration
CMD controller
01750060162 A
Cash Media Dispenser Version 4 - Service Manual
2-29
Photosensor electronics
The photosensor electronics cover generation and control of the photosensor
LED transmit stream and measurement of the receive voltage of the
phototransistors.
The optimum values for the transmit stream and amplification of the evaluation
logic are identified for every photosensor in the course of automatic
initialization of the photosensor parameters. Amplification of the evaluation
logic can be switched on four levels.
The transmit diodes are operated with pulsed current. The receive logic only
evaluates the pulse. This reduces the influence of light from external sources
on the receive signal.
The photosensors are polled one after another. Each photosensor operates
with its own specific parameters (current and amplification). These parameters
are constantly readjusted during operation. The photosensor parameters are
stored in a table in CMOS and are not lost when the CMD-V4 is turned off.
i
Upon initial start-up or after clearing of the photosensor CMOS area,
initialization takes place automatically when the device is turned on.
For the initialization process it is essential for the light paths of all
photosensors to be free. If this is not the case, error message <22>
will appear on the status display (see the "Troubleshooting" chapter).
Summary of Contents for CMD-V4
Page 1: ...Cash Media Dispenser Version 4 Service Manual Self Service Systems ...
Page 3: ...Cash Media Dispenser Version 4 Service Manual Edition April 2003 ...
Page 6: ...0 2 Cash Media Dispenser Version 4 Service Manual 01750060162 A ...
Page 36: ...Abbreviations Introduction 1 24 Cash Media Dispenser Version 4 Service Manual 01750060162 A ...
Page 233: ...01750060162 A Cash Media Dispenser Version 4 Service Manual Notes ...