Brother International HL-3400CN Service Manual - Page 244

HL-3400CN SERVICE MANUAL 4.3.9 Toner key sensor (TNK) (1) Remove the set screws ST3x6 (4 pcs.) from the toner key sensor PCB. (2) Disconnect the connector (1 pc.) connected to the IOD1 PWB. (3) Remove the toner key sensor PCB. Toner key sensor Fig. 7-56 4.3.10 Toner sensor (TTR) (1) Remove the set screw ST3x6 (2 pcs.) to remove the metal plate. (2) Remove the set screws ST3x6 (2 pcs.) from the toner sensor PCB. (3) Disconnect the connector and remove the toner sensor PCB. NOTE: There are two sets of tappedholes for the metalplate. Be sure to attach the metal plate onto the one closest to the toner sensor. Metal plate Toner sensor (TTR) Fig. 7-57 7-39