Brother International DCP 8080DN Service Manual - Page 143
No bell ring
UPC - 012502622697
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■ No bell ring. Step 1 2 3 4 Possible cause Ring delay Ring volume Connection between main PCB and NCU PCB Harness between main PCB and NCU PCB Check Ring delay is set to "0". Ring volume is set to "OFF". Are the main PCB and NCU PCB connected properly? Is the harness damaged? Result Remedy Yes Change the ring delay settings to another value. Yes Change the ring volume setting to another value. Reconnect the connector No properly. Replace the harness with a Yes normal one. Speaker 5 NCU PCB 6 Main PCB 7 Is the problem solved after replacing the speaker? Is the problem solved after replacing the NCU PCB ASSY? Is the problem solved after replacing the main PCB ASSY? Replace the Speaker. Yes Replace the NCU PCB Yes ASSY. Replace the main PCB Yes ASSY. 3-71 Confidential
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