Panasonic SA-BTT790EE / SC-BTT790EEK Service Manual ▷ View online
77
Caution: During assembling, ensure that the SMPS P.C.B.
is properly located and fully seated onto the Bottom Chas-
sis.
is properly located and fully seated onto the Bottom Chas-
sis.
Step 7 Upset the SMPS P.C.B..
Step 8 Desolder Red Wire (TL11) and Black Wire (TL21) on
SMPS P.C.B..
Step 9 Remove the SMPS P.C.B..
Step 8 Desolder Red Wire (TL11) and Black Wire (TL21) on
SMPS P.C.B..
Step 9 Remove the SMPS P.C.B..
Caution: During assembling, replace the SMPS PC Sheet
Unit if damage.
Unit if damage.
78
12.23. Replacement of Switching Reg-
ulator IC (IC5701)
• Refer to “Disassembly of Top Cabinet”.
• Refer to “Disassembly of SMPS P.C.B.”.
• Refer to “Disassembly of SMPS P.C.B.”.
12.23.1. Disassembly of Switching Regula-
tor IC (IC5701)
Step 1 Place the SMPS P.C.B. on an insulated material.
Step 2 Desolder pins of the Switching Regulator IC (IC5701) on
the solder side of SMPS P.C.B..
Step 3 Desolder pins of the Diode (D5702) on the solder side of
SMPS P.C.B..
Step 4 Desolder pins of the Heatsink A.
Step 2 Desolder pins of the Switching Regulator IC (IC5701) on
the solder side of SMPS P.C.B..
Step 3 Desolder pins of the Diode (D5702) on the solder side of
SMPS P.C.B..
Step 4 Desolder pins of the Heatsink A.
Step 5 Remove the Switching Regulator Unit in the direction of
arrow.
Caution: Avoid touching the Switching Regulator Unit due
to its high temperature after prolonged use. Touching it
may lead to injuries.
arrow.
Caution: Avoid touching the Switching Regulator Unit due
to its high temperature after prolonged use. Touching it
may lead to injuries.
Step 6 Remove 1 screw from the Switching Regulator IC
(IC5701).
Step 7 Remove the Switching Regulator IC (IC5701) from the
Heatsink A.
Note: Refer to the diagrams of SMPS P.C.B. (Item 19.4) for
location of the part.
(IC5701).
Step 7 Remove the Switching Regulator IC (IC5701) from the
Heatsink A.
Note: Refer to the diagrams of SMPS P.C.B. (Item 19.4) for
location of the part.
79
12.23.2. Assembly of Switching Regulator
IC (IC5701)
Step 1 Apply grease to the back of Switching Regulator IC
(IC5701).
Step 2 Fix and screw the Switching Regulator IC (IC5701) to
the Heatsink A.
Caution: Ensure that the Switching Regulator IC (IC5701) is
properly fixed and fully screwed onto the Heatsink A.
(IC5701).
Step 2 Fix and screw the Switching Regulator IC (IC5701) to
the Heatsink A.
Caution: Ensure that the Switching Regulator IC (IC5701) is
properly fixed and fully screwed onto the Heatsink A.
Step 3 Fix the Switching Regulator Unit onto SMPS P.C.B..
Caution: Ensure that Switching Regulator Unit is properly
seated on the SMPS P.C.B..
Caution: Ensure that Switching Regulator Unit is properly
seated on the SMPS P.C.B..
Step 4 Solder pins of the Switching Regulator IC (IC5701) on
the solder side of SMPS P.C.B..
Step 5 Solder pins of the Diode (D5702) on the solder side of
SMPS P.C.B..
Step 6 Solder pins of the Heatsink A.
the solder side of SMPS P.C.B..
Step 5 Solder pins of the Diode (D5702) on the solder side of
SMPS P.C.B..
Step 6 Solder pins of the Heatsink A.
80
12.24. Replacement of Diode (D5702)
• Refer to “Disassembly of Top Cabinet”.
• Refer to “Disassembly of SMPS P.C.B.”.
• Refer to “Disassembly of SMPS P.C.B.”.
12.24.1. Disassembly of Diode (D5702)
Step 1 Place the SMPS P.C.B. on an insulated material.
Step 2 Desolder pins of the Switching Regulator IC (IC5701) on
the solder side of SMPS P.C.B..
Step 3 Desolder pins of the Diode (D5702) on the solder side of
SMPS P.C.B..
Step 4 Desolder pins of the Heatsink A.
Step 2 Desolder pins of the Switching Regulator IC (IC5701) on
the solder side of SMPS P.C.B..
Step 3 Desolder pins of the Diode (D5702) on the solder side of
SMPS P.C.B..
Step 4 Desolder pins of the Heatsink A.
Step 5 Remove the Switching Regulator Unit in the direction of
arrow.
Caution: Avoid touching the Switching Regulator Unit due
to its high temperature after prolonged use. Touching it
may lead to injuries.
arrow.
Caution: Avoid touching the Switching Regulator Unit due
to its high temperature after prolonged use. Touching it
may lead to injuries.
Step 6 Remove 1 screw from the Diode (D5702).
Step 7 Remove Diode (D5702) from the Heatsink A.
Note: Refer to the diagrams of SMPS P.C.B. (Item 19.4) for
location of the part.
Step 7 Remove Diode (D5702) from the Heatsink A.
Note: Refer to the diagrams of SMPS P.C.B. (Item 19.4) for
location of the part.
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