Riso Error A16-525 |link| 〈WORKING〉

Troubleshooting Guide: Decoding and Fixing RISO Error Code A16-525

If you are a print shop operator or a maintenance technician for a RISO high-speed inkjet printer (specifically the ComColor series like GD, GH, or GL models), seeing the error code A16-525 flash on your control panel is a moment that demands immediate, focused attention.

Reflective Strip Issues: Risograph machines use a small black velvet light-absorber strip (part number 023-17004) to detect the presence of a master. If this strip is worn, dusty, or replaced with a non-original version, light reflects off the drum surface, causing a false positive. riso error a16-525

The Riso error A16-525 is a common "service call" code on Risograph digital duplicators, typically indicating that the machine is awaiting master removal from the print cylinder. While it primarily signals that a used master is still attached to the drum when the machine expects it to be gone, it often appears as a "false" error even when no master is present. Common Causes of Error A16-525 Troubleshooting Guide: Decoding and Fixing RISO Error Code

Disposal Compression Plate: Inside the disposal unit, a plate compresses the masters to save space. If this plate is stuck or its home-position sensor is dirty, the A16-525 error will trigger. The Riso error A16-525 is a common "service

5. Parts Likely to Replace (if cleaning & reseating fails)

| Part Number (Example) | Description | When to replace | |-----------------------|-------------|------------------| | 970-11205-XXX | Home position sensor assembly | Sensor gives no signal or intermittent signal | | 940-20410-XXX | Encoder disc (color-specific) | Cracked or missing timing marks | | 910-50001-XXX | Drum drive belt | Slipping, cracked, or teeth missing | | 910-40012-XXX | Drum drive motor (stepper) | Motor stalls or fails to rotate drum consistently |

3. Verify Print Drum Alignment

Check the print drum for proper alignment and ensure it is not damaged. Consult the machine's manual for instructions on how to check and adjust the drum.

: If the drum isn't returning to its exact home position (Position-A), the sensor may miss the absorber strip. Test Mode Adjustment : Some technicians use Test Mode (e.g., code