ASM SIPLACE 03109668 is identified in SIPLACE parts references as an MHCU CPL module. The main purchasing issue is not simply finding an MHCU-related board; it is confirming which MHCU assembly level is actually required.
In the same machine and gantry documentation, 03109668S02 is listed separately from 03090990 complete MHCU and 03090998 MHCU-BA connection PCB. These references describe different service items and should not be collapsed into one generic MHCU replacement.
This distinction is particularly important when maintenance reports only state an MHCU-area fault. The machine symptom should first be tied to the actual failed assembly before a CPL module, connection PCB or complete MHCU is ordered.

03109668 MHCU Specifications
| Part Number | 03109668 |
| Documented Reference | 03109668S02 MHCU CPL |
| Part Type | MHCU CPL module |
| Application | SIPLACE gantry and head-control architecture |
| Related Larger Assembly | 03090990 — MHCU complete |
| Related PCB | 03090998 — MHCU-BA connection PCB |
| Selection Point | Confirm the exact failed MHCU-level assembly before ordering |
When troubleshooting this area, separate the module from the surrounding power, connections, MHCU-BA PCB and connected head-side path. The purpose is not to follow a generic board-replacement sequence, but to determine where the fault remains in the MHCU chain.
If the installed 03109668 module has a different suffix from the documented S02 reference, send the complete label rather than ordering by the seven-digit base P/N alone. Revision interchangeability should not be assumed without confirmation.
For high-value MHCU repairs, customers can send the label, machine configuration, installation photos, alarm details and fault video for remote technical troubleshooting. Depending on the unit and condition, exchange-repair service can also be discussed. Related head-control assemblies can be reviewed under ASM SIPLACE SMT head parts.