Replacement Of Switch Regulator Ic (Ic5701) - Panasonic SA-VK470EE Service Manual

9.23. Replacement of Switch
Regulator IC (IC5701)
• • • • Follow (Step 1) to (Step 3) of Item 9.3.
• • • • Follow (Step 1) to (Step 8) of Item 9.13.
• • • • Follow (Step 1) to (Step 6) of Item 9.19.
• • • • Follow (Step 1) to (Step 4) of Item 9.22.
Step 1 Desolder pins of the switch regulator IC (IC5701) on the
reverse side of SMPS P.C.B.
Step 2 Remove 1 screw from the switch regulator IC (IC5701).
Step 3 Remove the switch regulator IC (IC5701) from the
heatsink unit B.
Caution: Handle the heatsink unit B 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 20.5.) for
location of the part.
9.23.1. Assembly of Switch Regulator IC
(IC5701)
Step 1 Apply grease to the heatsink unit B.
Step 2 Fix and screw the switch regulator IC (IC5701) to the
heatsink unit B.
Special Note: Ensure the switch regulator IC (IC5701) is tightly
screwed to the heatsink unit B.
Step 3 Solder pins of the switch regulator IC (IC5701) on the
reverse side of SMPS P.C.B.
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SA-VK470EE