Replacement Of Switch Regulator Ic (Ic5701) - Panasonic SA-PT460 Service Manual

Step 3 Detach 8P cable at the connector (CN5500) on D-Amp
P.C.B.
Step 4 Detach 11P cable at the connector (CN5802) on SMPS
P.C.B.
Step 5 Remove 8P cable (SMPS P.C.B. to D-Amp P.C.B.) from
the big wire holder.
Step 6 Remove SMPS P.C.B.
Special Note: During reassembling procedures, ensure the
P.C.B. is seated properly at the locators.
9.22. Replacement of Switch
Regulator IC (IC5701)
• • • • Follow (Step 1) to (Step 3) of Item 9.3.
• • • • Follow (Step 1) to (Step7) of Item 9.15.
• • • • Follow (Step 1) to (Step 6) of Item 9.21.
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.
9.22.1. 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.
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SA-PT460EB / SA-PT460EG