GE Eagle 1000, Инструкции по обслуживанию

Страница: 53 / 148

GE Medical Systems EAGLE 1000
Page 53
Information Technologies
Servicing Instructions 227 468 01 Rev. G
2.2.12 Recorder 50 Part No. 218 111 12
Construction
The Recorder 50 is a compact module comprising a drive and drive electronics. The drive
essentially comprises 2 shells in which the DC motor-transmission-speedo unit, rubber
cylinder, thermal-array printhead, paper container with paper feed flap are assembled.
The complete drive electronics is located on the PCB Recorder 50 in the drive.
2.2.12.1 Function
The circuit setup is shown in the circuit block diagram “Recorder block diagram” The two
main recorder components are the printhead and the motor for paper advance.
The printhead power supply comes from the through-connected battery voltage,
increased to +22 V by a transformer.
The printhead controller acts on the printhead and the motor indirectly. It can be reset by
the host processor or by the printhead electronics.
The printhead controller acquires its data from the host processor and returns relevant
information. It acts on the printhead via a protective circuit which measures the print
head temperature and processes this. This protective circuit also receives information on
the requested heating pulse duration, which can be adjusted, and which can be modified
in accordance with the printhead temperature.
The Eagle 1000 uses only one motor speed, 25 mm/s. This is preset by the motor con-
troller and can be adjusted.
The motor current signal “MISEN”, which is passed on to the host processor, is used to
protect the motor.