• Code: 929.01 ... 929.03
• Description: Sensor (toner empty) sensor failure. The sensor (toner empty) does not provide toner level feedback or the print cartridge is damaged. 1. Check the toner pulse wheel on the print cartridge for damage and replace the print cartridge if needed. 2. Check the sensor (toner empty) for proper operation.
• Remedy: 1 Check the sensor (toner empty) for proper installation. Is the above component properly installed? go to step 2. Reinstall the sensor (toner empty) 2 Check the sensor (toner empty) for proper operation. 1. Enter the diagnostic mode 2. Select Base sensor test 3. Observe the line item “toner” Does the display on the operator panel, change every time the sensing area of the above sensor is interrupted or blocked? The sensor is working properly. Go to step 3. 3 Check the above sensor for proper connection. Is the above sensor connected properly? Replace the sensor (toner empty). Go to “Sensor (toner empty) removal (T650, T652, T654)”. Replace the connection.

• Code: 930.00
• Description: Incorrect printhead or intermittent Hsync A non supported printhead is installed. Hsync signal is intermittent or noisy. Printhead ID resistor circuit is not to spec.
• Remedy: Replace the printhead assembly.

• Code: 931.00
• Description: No first laser H sync The hsync signal is missing or not at the correct voltage.
• Remedy: Replace the printhead assembly.

• Code: 932.00
• Description: Printhead lost laser H syncs. The hsync signal is missing or not at the correct voltage.
• Remedy: Replace the printhead assembly.

• Code: 933.00
• Description: Polygon mirror motor locked. No first laser H sync received. The hsync signal is missing or not at the correct voltage.
• Remedy: Replace the printhead assembly.

• Code: 934.00
• Description: Mirror motor lost lock. The signals driving the polygon motor may have been corrupted, or the cable may be loose, or the motor may be bad.
• Remedy: 1. Check all connections on the printhead assembly. 2. Check all connections on the system card assembly. 3. Replace the printhead assembly.

• Code: 935.00
• Description: Polygon mirror motor control failure. The signals driving the polygon mirror motor may have been corrupted, or the cable may be loose, or the motor may be bad.
• Remedy: 1. Check all connections on the printhead assembly. 2. Check all connections on the system card assembly. 3. Replace the printhead assembly.

• Code: 936.10 ... 936.91
• Description: Main drive motor assembly failure
• Remedy: 1. Check all connections on the system card assembly. 2. Check all connections on the main drive motor assembly. 3. Replace the main drive motor assembly. Go to “Output cover assembly removal (T650, T652, T654)”. 4. Replace the system card assembly if problem remains.