Replacement Of Switching Regulator Ic (Ic5701); Replacement Of Diode (D5802) - Panasonic SA-PT70EB Service Manual

Caution: During assembling, ensure that SMPS P.C.B. is
properly located & fully inserted onto Bottom Chassis.
8.9. Replacement of Switching Reg-
ulator IC (IC5701)
• Follow (Step 1) to (Step 6) of Item 8.3.
• Follow (Step 1) to (Step 3) of Item 8.5.
• Follow (Step 1) to (Step 4) of Item 8.8.
8.9.1. Disassembly of Switching Regula-
tor IC (IC5701)
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) from the
Heatsink Ext A.
Caution: Handle the Heatsink Ext A with caution 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 18.4) for
location of the part.
8.9.2. Assembly of Switching Regulator
IC (IC5701)
Step 1 Apply grease to the Heatsink Ext A.
Step 2 Mount the Switching Regulator IC (IC5701) to the
SMPS P.C.B..
Caution: Ensure pins of the Switching Regulator IC
(IC5701) are properly seated and soldered on SMPS P.C.B..
Step 3 Fix and screw the Switching Regulator IC (IC5701) to
the Heatsink Ext A.
Caution: Ensure the Switching Regulator IC (IC5701) is
tightly screwed to the Heatsink Ext A.
Step 4 Solder pins of the Switch Regulator IC (IC5701) on the
solder side of SMPS P.C.B..

8.10. Replacement of Diode (D5802)

• Follow (Step 1) to (Step 6) of Item 8.3.
• Follow (Step 1) to (Step 3) of Item 8.5.
• Follow (Step 1) to (Step 4) of Item 8.8.
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