Panasonic SA-BT300PX, Service Manual

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9.21. Replacement of Switching Reg-
ulator IC (IC5701)
9.21.1. Disassembly of Switching Regula-
tor IC (IC5701)
• Follow (Step 1) to (Step 3) of Item 9.3.
• Follow (Step 1) to (Step 6) of Item 9.6.
• Follow (Step 1) to (Step 7) of Item 9.20.
Step 1 Desolder pins of the switching regulator IC (IC5701) on
the solder side of SMPS P.C.B..
Step 2 Remove 1 screw from the switching regulator IC
(IC5701).
Step 3 Remove the switching regulator IC (IC5701).
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 part.
9.21.2. Assembly of Switching Regulator
IC (IC5701)
Step 1 Apply grease to the heatsink unit B.
Step 2 Mount the switching regulator IC (IC5701) on to SMPS
P.C.B.
Step 3 Fix and screw the switching regulator IC (IC5701) to the
heatsink unit B.
Caution: Ensure the switching regulator IC (IC5701) is
tightly screwed to the heatsink unit B.
Step 4 Solder pins of the switching regulator IC (IC5701) on the
solder side of SMPS P.C.B..
Caution: Ensure pins of the switching regulator IC (IC5701)
are properly seated and soldered on SMPS P.C.B..
9.22. Replacement of Rectifier Diode
(D5702)
9.22.1. Disassembly of Rectifier Diode
(D5702)
• Follow (Step 1) to (Step 3) of Item 9.3.
• Follow (Step 1) to (Step 6) of Item 9.6.
• Follow (Step 1) to (Step 7) of Item 9.20.