Service manual

4. BOARD/UNIT DESCRIPTION
4.16 Service Manual BSM-4100
The recorder unit consists of thermal array head, paper drive motor, photo sensor,
gears, recorder chassis, sensor board and sensor control board.
The RACOON (ASIC) on the MAIN board allows the recorder unit to record the 3
channel waveforms, vital sign list and trendgraph.
Since the thick membrane type thermal array head is used, the adjustment of the
supply voltage to the head is not required. The lifetime of the heating elements on
the head is 100 million heating times.
A stepping pulse motor is used as the paper drive motor. The lifetime of the motor
is approx. 3000 hours continuous operation.
When the LED and photo sensor set on the sensor board is replaced with a new
one, the sensor control VR must be adjusted. See Section 7 ADJUSTMENT.
Recorder Unit (for BSM-4101/4102/4103/4104 only)