Service Manual SummaSign
REPLACING THE DRIVE DRUM
To replace the drive drum, proceed as follows:
145.Remove the left-hand cover (see Chapter 2. 1, Removing the left-hand cover).
146.Turn the unit upside down.
147.Remove the bottom plate (see Chapter 2.3, Removing the bottom plate).
148.Remove the four screws holding the fan motor in place. Put the fan motor to the side to expose the
drive drum.
149.Remove the screw of the sensor that goes across the drive drum. Put the sensor to the side to
expose the drum.
150.Remove the various screws holding the drum sleeves in place. The number of sleeves varies
depending on the cutter type.
151.Remove the three screws holding the X-motor(s) in place and put the motor to the side. It is not
necessary to disconnect the wires connected to the motor.
152.Remove the belt.
153.Loosen the two setscrews holding the drive drum pulley in place.
154.Pull the pulley out to its full extent. The pulley need not be removed from the unit.
155.Remove the drive drum.
92. Note:
93. Because all the sleeves of the drive drum are accurately matched, it is not
possible to replace just one sleeve.
To re-install, proceed as follows:
156.Put the drum into the shaft in the correct position. The largest sleeve should be to the side of the
keyboard.
157.Put the screws into the blocks but do not tighten them yet.
94. Note:
95. It is very important that the drive drum be stable and stationary to prevent the
media from shifting about. To achieve this, proceed as follows:
96. a.Secure the block to the left (or right) of the large sleeve by tightening its
screws. Make sure the block is positioned perpendicularly over the holes and that
the long sleeve is positioned in the middle of the hole in the base plate.
97. b.Press the block situatedto the right (or left) of the large sleeve firmly against
the sleeve and tighten the screws of the block.
158.
159.Now firmly tighten the screws of the other blocks. Make sure they are positioned straight and that
they do not have any play. Gently press the blocks against the sleeves when tightening the
screws.
160. Thoroughly clean the strip slot.
161.Push the pulley back into its place.
Replacement Guidelines 2-33
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