Beginning with serial number 320500 series, most machines will have the EMI cover assembly (PN: 32232-XX) installed. Older machines will have the 32188 series EMI cover (PN: 32188) installed. Due to problems with the harnesses being damaged when the cover is not carefully installed, it is recommended that the old type covers be replaced as the machine is serviced in the field, or when damaged harnesses are found (damaged from being bent underneath the old style covers).
Figure 1 - 32188 Series EMI Cover Mounted
Removal of the EMI Cover:
1. Engage the emergency stop by pressing 
in or turn the machine OFF.
2. Carefully remove the screws, being careful not to strip them. Break them loose first. Set the screws aside where they can not be dropped accidentally onto the main PCB underneath the EMI Cover.
3. Remove the cover.
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CAUTION!! Use extreme care not to drop metallic objects, tools, or other conductive material on the Main PCB when you have the base cover removed. If you drop such objects on the Main PCB, it can severely damage the electronics which will be very expensive to repair. |
Installation of 32188 Series EMI Cover:
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CAUTION!! Use extreme care not to damage the Main PCB during the installation of the EMI cover. Do not put stress on the harness connections or the harnesses. Avoid sharp bends in the harnesses as that may damage the harness beyond repair. Failure to exercise this caution during installation of the EMI cover can result in severe damage to the Main PCB and will be very expensive to repair. |
Prior to installing the EMI cover, make sure you have sufficient slack in the harnesses where they extend to the Main PCB without stressing the connectors or the harnesses themselves. If there is any stress at all on the harnesses you will probably damage either the harnesses or the Main PCB. Most of the extra slack in the harnesses should be in the bed cavity of the lower arm casting. If the harnesses are too tight, cut the cable ties that bundle them along the back of the machine and pull additional slack through to the main board. Then replace the cable ties, routing the harnesses in the same position before you cut the cable tie.
Figure 2 - Harness Positioning at Back of Main PCB
Position the harnesses that connect to the back edge of the Main PCB as shown above so that they run behind the right rear standoff and to the access hole as shown in Figure 2 above.
Figure 3 - Harness Positioning at Right side of Main PCB
Adjust the position of all the harnesses along the right side of the Main PCB as shown in Figure 3 above. There should be absolutely no stress on the connectors or the harnesses. The harness wiring should dip slightly between the Main PCB and the reinforcing rib of the casting.
Make sure all of the connectors along the right side of the Main PCB are secure and properly seated in the connector.
Reposition the ferrite block on the User Interface Harness as shown in Figure 3 above, pulling available slack to the front of the machine.
Figure 4 - User Interface Harness and Right LED Cluster Harness Positioning
Position the User Interface Harness and the right LED Cluster Harness as shown in Figure 4 above. Be careful not to put stress on the connectors or a sharp bend in the harnesses or you might damage them. Note the amount of slack between the ferrite block and the User Interface Harness connector.
Figure 5 - Ethernet Harnesses and Left Side Connectors
Reposition the ferrite block on the Ethernet Harnesses so that you have plenty of slack in the harness as shown in Figure 5 above.
Position the Left LED cluster and all the harnesses as shown in Figure 5 above so that there is absolutely no stress on the connectors or any sharp bends in the wiring.
Carefully, position the EMI cover in place aligning the screw holes to the standoffs. You should be able to position the cover in place with a minimum amount of pressure.
Mount the EMI cover to the standoffs as shown in Figure 1 with ten M4x8mm pan head Phillips screws w/star (PN: 009863-08). Tighten the screws to Melco Torque Specifications.
