Panasonic SA-BT300PX, Service Manual

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Step 1 Desolder pins of the rectifier diode (D5702) on the sol-
der side of SMPS P.C.B..
Step 2 Desolder pins of the heatsink unit B.
Step 3 Remove 1 screw from the switching regulator IC
(IC5701).
Step 4 Remove the heatsink unit B with rectifier diode (D5702)
in the direction of arrows.
Step 5 Remove 1 screw from the rectifier diode. (D5702).
Step 6 Remove the rectifier diode (D5702).
Caution: Handle the SMPS P.C.B. with care due to its high
temperature after prolonged use. Touching it may lead to
injuries.
Note: Refer to the diagrams of SMPS P.C.B. (Item 17.8) for
location of the electrical components.
9.22.2. Assembly of Rectifier Diode
(D5702)
Step 1 Apply grease to the heatsink unit B.
Step 2 Fix and screw the rectifier diode (D5702) to the heatsink
unit B.
Caution: Ensure the rectifier diode (D5702) is tightly
screwed to the heatsink unit B.
Step 3 Mount the heatsink unit B with rectifier diode (D5702) on
SMPS P.C.B. in the direction of arrows.
Caution: Ensure the heatsink unit B with rectifier diode
(D5702) are properly seated on SMPS P.C.B.
Step 4 Fix and screw the switching regulator IC (IC5701) to the
heatsink unit B.
Step 5 Solder pins of the rectifier diode (D5702) on the solder
side of SMPS P.C.B..
Step 6 Solder pins of the heatsink unit B on the pattern side of
SMPS P.C.B..