Internal Memory Errors; Security Function Lock Related Problems; Ink Cartridge Related Problems; Loud Printing Sound - Brother MFC-J3520 Service Manual

4.10.4 Internal memory errors

User Check
- Delete saved print data and fax data.
- Disconnect and insert again the power cord.
Step
1 Main PCB defective

4.10.5 Security Function Lock related problems

User Check
- Ask administrator to release security function lock.
- Delete the personal information to unlock the password.
Step
1 Main PCB defective

4.10.6 Ink cartridge related problems

User Check
- Check if incompatible ink cartridge is set.
- Reset the ink cartridge.
- Check if ink cartridge has been already set before instruction for ink cartridge setting
during initial installation.
Step
1 Ink sensor flat cable
connection failure
2 Each ink cartridge sensor, ink
remaining sensor, ink cartridge
detection sensor, or IC chip
PCB defective
3 Main PCB defective

4.10.7 Loud printing sound

User Check
- Set the silent mode enabled in the user menu.
Cause
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
Cause
Reconnect the ink sensor flat cable.
Replace the ink refill ASSY.
Replace the main PCB ASSY.
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Solution
Solution
Solution
Confidential