Hi Phillip. I did some digging around and got this information.
Communication error between MCU-PF and LPH Unit (y) (data...
Communication error between MCU-PF and LPH Unit (Y) (data read error from LPH)
NOTE:
When turning the power OFF, turn OFF the Power Switch first and then the Main Power Switch.
Cause/Action
Check the following:
- The Flat Cable between the Motor Driver Main PWB P/J557 and the LPH Rear PWB (Y) P/J561 for open circuit, short circuit, and poor contact.
- The Flat Cable between the LPH Header PWB (Y) P/J569 and the Driver PWB (Y) P/J577 for open circuit, short circuit, and poor contact (connection within the LPH Unit)
- The connector ( P/J581) between the LPH Rear PWB (Y) and the LPH Header PWB (Y) for poor contact, damage, and foreign substances.
- The LPH Unit (Y) for improper installation
- The Drum Unit (Y, M, C, K) for improper installation (affected by the noises caused by improper installation)
- The connector ( J1) between the MCU-PF PWB and Motor Driver Main PWB for poor contact, damage, and foreign substances.
If no problems are found, replace the following parts in sequence:
- LPH Unit (Y) ( PL 2.1)
- LPH Cable Assembly ( PL 2.2)
- LPH Rear PWB (Y) ( PL 2.2)
- MCU-PF PWB (7830/35) ( PL 18.2A)
- MCU-PF PWB (7845/55) ( PL 18.2B)
You will need a Serivce manual to figure out that, I'm not a tech so I can't tell you what most of this means.