Epson Expression 12000XL A3 Flatbed Photo Scanner Red light scanning problem repair

Описание: Issue: Red light during scanning / abnormal red illumination / scan output tinted red
📌 Reported Problem
Customer reported that the scanner shows:
Continuous red light while scanning
Red-tinted scanned images
Incomplete or distorted scan output
Scanner initialization failure in some cases
🔍 Diagnosis Summary
After inspection, the issue may be related to one or more of the following:
LED light source malfunction
Aging or failing RGB LED module
Red channel stuck or overpowered
CIS/CCD sensor issue
Sensor imbalance
Calibration failure
Partial sensor damage
Internal ribbon cable / connector fault
Loose or oxidized connection
Signal imbalance
Main board / power supply instability
Incorrect voltage to LED assembly
Driver circuit fault
Firmware / calibration corruption
Requires recalibration via Epson service utility
🛠 Repair Work Performed (Sample Description)
Disassembled scanner top assembly
Cleaned scanning bed and internal optical path
Checked LED module voltage output
Reseated ribbon cables and connectors
Performed internal calibration reset
Tested scan output under multiple resolutions
If required:
Replaced LED light module / CCD assembly
Repaired or replaced main PCB
Final testing completed successfully with normal white illumination and accurate color reproduction.
⚠️ Service Disclaimer
You can copy this section for invoice or service form:
📄 Repair Disclaimer
This repair addresses the reported red light scanning issue only.
Due to the complexity of optical and electronic components, long-term performance cannot be guaranteed if additional internal wear exists.
If CCD/LED module replacement is required, parts availability may affect turnaround time.
The customer acknowledges that opening and servicing the scanner voids any remaining manufacturer warranty.
Any unrelated faults discovered after repair are not included unless specifically agreed in writing.
Data, artwork, or originals placed on the scanner are the customer’s responsibility.