• Code: 01
• Description: Ready LED won't light up.
• Causes: 1. No Power? 2. VCC(+5V)>= +4.5V? 3. U15-130(/POR) is HIGH? (+4.5V or over) 4. U15-153(/RST_OUT) is HIGH? (+4V or over)
• Remedy: 1. Check power(SMPS). 1) Cord connection 2) Check each power channel. (+5V, +11.75V, +30V) 2. Check power. 3. Check the circuit around U16. 4. Check data bus of U15. Exchange the main PBA.

• Code: 02
• Description: LF motor does not operate.
• Causes: 1. Check control signal of U15-141 - 145. 2. Check driving output and input signal of U27 and U28.
• Remedy: 1. Replace the main PBA if control signal is not generated though the other functions of the system are normal. 2. Replace U27 and U28 if driving output is defective though input signal is normal.

• Code: 03
• Description: CR motor does not operate.
• Causes: 1. Check control signal of U15-31 - 36. 2. Check driving output and input signal of U25 and U26.
• Remedy: 1. Replace the main PBA if control signal is not generated though the other functions of the system are normal. 2. Replace U25 and U26 if driving output is defective though input signal is normal.

• Code: 04
• Description: Paper Jam
• Causes: Check sheet feeder and ejector.
• Remedy: Get rid of jammed paper.

• Code: 05
• Description: Document Jam
• Causes: Check manual document feeder.
• Remedy: Remove jammed documents and insert it again.

• Code: 06
• Description: No Paper
• Causes: 1. No paper? 2. U17-24 is HIGH? (+4V or over)
• Remedy: 1. Feed paper. 2. If high, replace the paper empty sensor. If low, replace the main PBA.

• Code: 07
• Description: No Document
• Causes: 1. No document? 2. U15-125 is HIGH? (+4V or over)
• Remedy: 1. Insert documents. 2. If high, check SEN1 and the surrounding circuit. If low, replace the main PBA.

• Code: 08
• Description: No Cartridge
• Causes: 1. Check if ink cartridge is mounted. 2. Check contacted part of the head. 3. Check head checking circuit and driver.: Check U15-8,9,10,128,154,156, U17-23 control signals and head data.
• Remedy: 1. Mount ink cartridge. 2. Clean it. 3. Replace the main PBA.