Left Tray Guide Pu / Paper Size Sensor Pu / Room Temp Thermistor Pu - Brother MFC-9420CN Service Manual

5.1.57 Left Tray Guide PU / Paper Size Sensor PU / Room Temp Thermistor PU

(1) Remove the setscrew (BT3x8, 2 pieces) of the left tray guide PU.
(2) Pull out the left tray guide PU from the cassette side.
(3) Disconnect the connector connecting to the paper size sensor PU.
(4) Remove the connector tape.
(5) Remove the pin to remove the room temp thermistor PU.
(6) Disconnect the connector connecting to the room temp thermistor PU.
(7) Remove the setscrew (BT3x8, 2 pieces) of the paper size sensor PU and then remove the
paper size sensor PU from the left tray guide PU.
<Confirmation Items>
• Is the grounding wire securely installed to the indicated position?
• Isn't any harness caught?
• Is the appropriate screw used?
• After above confirmation, confirm the safety through the withstand voltage test or with
the insulation tester.
WARNING:
Replacement of the paper size sensor PU (PSU) requires the substantial disassembly and
also reassembly. As the inappropriate assembly procedures and the wrong use of screws
affect the product safety and the product performance, the appropriate assembly procedures
and the caution items must be respected. (This work requires the insulation withstand
voltage test and the measurement of the insulation resistance.)
Connector tape
Connector tape
BT3x8
Connector
Room temp
thermistor PU
Room temp
thermistor PU
Paper size sensor PU
Connector
BT3x8
BT3x8
Left tray guide PU
Fig. 5-104
5-67
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Left tray guide PU
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