Disassembling The Ac Inlet, Power & Sub Power P.c.b; Disassembly Of Digital Amp Ic; Disassembly Of Regulator Ic; Disassembly Of Switch Regulator Ic (Ic5701) - Panasonic SA-HT640WP Service Manual

SA-HT640WP / SA-HT640WPC
10.10. Disassembling the AC Inlet,
Power & Sub power P.C.B
· Follow the (Step 1) to (Step 4) of Item 10.6.
· Follow the (Step 1) to (Step 4) of Item 10.7.
Step 1 Remove 2 screws. (side fan unit)
Step 2 Detach fan unit. (CN5714)
Step 3 Remove the 2 tie wraps (used for black/red wires
between AC Inlet P.C.B. and Power P.C.B.) to the side of
bottom chassis.
Step 4 Remove shield.
Step 5 Remove 4 screws.
Step 6 Detach the FFC cables from connectors (CN5701,
CN5708, CN5050).
Step 7 Remove the AC Inlet, Power & Sub power P.C.B.
Caution: Remember to use tie wraps to tie the black/red
wires to the side of bottom chassis after repair or
troubleshooting.

10.11. Disassembly of Digital Amp IC

· Follow (Step 1) to (Step 7) of Item 10.10.
Step 1 Desolder all IC5000, IC5200, IC5300 pins.
Step 2 Release the claws.
Step 3 Remove the D. Amp IC.
Note: Refer to the diagrams of Power P.C.B. (Section 19.3) for
location of the parts.

10.12. Disassembly of Regulator IC

· Follow (Step 1) to (Step 7) of Item 10.10.
Step 1 Desolder all pins of D5711, D5712, D5716, Q5740.
Step 2 Desolder 2 pins of Regulator IC.
Step 3 Remove the Regulator IC.
Note: Refer to the diagrams of Power P.C.B. (Section 19.3) for
location of the parts.
10.13. Disassembly of Switch
Regulator IC (IC5701)
· Follow (Step 1) to (Step 7) of Item 10.10.
Step 1 Desolder all pins of IC5701.
Step 2 Desolder 2 pins of Switch Regulator IC.
Step 3 Remove the Switch Regulator IC.
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