Procedure - Potentiometer R863 3 - 5
Siemens AG SPB7-230.841.03 Page 5 of 6 M300/1000/3000/3000 Nova
Medical Solutions Rev. 02 04.04 CS PS 24 Service
• Drive the compression slide manually into its uppermost position. During this observe
the cord carefully to determine whether the winding of its one end and the unwinding of
its other end occurs freely. It is essential that the winding cord does not obstruct the
unwinding one. If this is not the case, disentangle the windings of the cord on the pulley.
In the uppermost position, read the resistance measured, typically it will be around 1435
Ohm.
• Drive the slide fully down and re-check the resistance to ensure it is still within limits,
i.e. 230 Ohm +
20 Ohm.
• The procedure of driving the slide down and up and concurrently observing the winding
and unwinding of the cord, and then checking the resistance value at the lower limit, can
be repeated one or two times. The adjustment can be considered successful if the
measured resistance value is within the given tolerance; more important: the assembly
was successful if the winding/unwinding of the cord works well.
• Attach the curtain / filmstrip back onto the slide.
• Mount the left and right side cover.
• Fix the upper cover with locking pin; mount the knob and its lid back onto the shaft of the
potentiometer for F-max.
• Attach the lower cover. Reconnect securely the connector X874. Insert the connector
back into the space within the vertical part of the arm.
• Proceed with the calibration of compression as described in the paragraph Compression
Calibration, in the Chapter: Adjustment and Service Program, document print No.
SPB7-230114.03, (mainly Thickness top/bottom).
• Re-attach the plastic covers of the tube assembly.
• Demonstrate the unit in working condition and hand over to customer.
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