Brother MFC-J3520 Service Manual page 364

■ Precautions for replacement work
(1) When replacing the condenser, put on a grounding wristband.
(2) Do not touch the tip of the soldering iron to the condenser's external sleeve, the sleeve
will melt or break.
(3) Do not touch the tip of the soldering iron to the body of condenser. In use the soldering
iron (30W or under), solder at iron tip temperature not more than 350°C within 4
second. Solder the condenser three times or less at intervals of 15 second or more.
(4) The lead wires and terminals are plated for solderability. Rasping or filling lead wires or
terminals might damage the plating layer and degrade the solderability.
(5) Do not use a condenser more than once after it has been mounted on the PCB.
Excessive heat stress is applied when detaching it from the PCB.
■ Replacement procedures
(1) Remove the Main PCB ASSY from the machine.
(2) Turn over the Main PCB ASSY, put the soldering iron to the soldered part of the
Condenser, and remove the Condenser from the Main PCB ASSY.
Main PCB ASSY
Condenser
Condenser
Fig. App 4-1
App. 4-2 Confidential