[ 3 ] Communications related

Trouble

 

Check:

 

 

 

(1) No tone is transmitted.

Main PCB

 

NCU PCB

 

 

 

[ 4 ]

Paper/document feeding related

 

 

 

 

 

 

Trouble

 

Check:

 

 

 

 

(1)

Neither "COPY: PRESS

Sensors by using the maintenance-mode function code 32.

 

COPY" nor "FAX: NO. &

 

(Refer to Chapter V, Section 3.8, "Sensor Operational Check".)

 

START" message appears

Document front sensor actuator and rear sensor actuator

 

although documents are set.

 

• Main PCB

 

 

 

 

 

 

(2)

Document not fed.

ADF and its related sections

 

 

Drive motor and its harness

 

 

LF roller and its related gears

 

 

Solenoid and the planetary gear train

 

 

• Main PCB

 

 

 

 

(3)

Recording paper not fed.

Paper feed roller and its related sections

 

 

Drive motor and its harness

 

 

Platen and its related gears

 

 

Solenoid and the planetary gear train

 

 

• Main PCB

 

 

 

 

(4)

Document double feeding

ADF parts

 

 

 

 

VI - 14

Page 165
Image 165
Brother MFC-970MC, FAX-931, FAX-921 service manual Communications related, Paper/document feeding related