Brother International DCP 8080DN Service Manual - Page 152
Others Problems
UPC - 012502622697
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13. OTHERS PROBLEMS ■ The machine is not turned on, or the LCD indication does not appear. Step Cause Check Result Remedy Harness Is the harness of the Reconnect the LCD panel 1 connection failure of LCD LCD panel PCB ASSY connected correctly? No PCB ASSY harness. panel PCB LCD panel PCB Is the problem solved Replace the LCD panel 2 failure after replacing the LCD Yes PCB ASSY. panel PCB ASSY? LCD panel failure Is the problem solved Replace the LCD panel 3 after replacing the LCD Yes ASSY. panel ASSY? Low-voltage 4 power supply failure Is the problem solved after replacing the PS PCB unit? Replace the PS PCB unit. Yes Main PCB 5 Is the problem solved after replacing the main PCB ASSY? Replace the main PCB Yes ASSY. ■ The fan does not work. (Verify the position of each fan referring to "4.19 Operational Check of Fans (Function code 78)" in Chapter 7.) Step 1 2 Cause Harness connection failure of the appropriate fan Charge HVPS PCB failure Low-voltage 3 power supply failure Main PCB 4 Check Is the harness of the appropriate fan connected correctly? Result Remedy Reconnect the harness of No the appropriate fan correctly. Is the problem solved after replacing the charge HVPS PCB ASSY? Is the problem solved after replacing the PS PCB unit? Is the problem solved after replacing the main PCB ASSY? Replace the charge HVPS Yes PCB ASSY. Replace the fuser unit fan (FU) and air intake fan (AIR). Replace the PS PCB unit. Yes Replace the LVPS fan (PS). Replace the main PCB Yes ASSY. 3-80 Confidential