Panasonic SA-BTT790EE / SC-BTT790EEK Service Manual ▷ View online
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Caution: During assembling, ensure that D-Amp P.C.B. is
properly located and fully seated onto the Bottom Chassis.
properly located and fully seated onto the Bottom Chassis.
12.20. Replacement of Digital Ampli-
fier IC (IC5200/IC5300)
• Refer to “Disassembly of Top Cabinet”.
• Refer to “Disassembly of D-Amp P.C.B.”.
• Refer to “Disassembly of D-Amp P.C.B.”.
12.20.1. Disassembly of Digital Amplifier IC
(IC5200/IC5300)
Caution: Handle the D-Amp P.C.B. with caution due to it's
high temperature after prolonged use. Touching it may
lead to injuries.
Step 1 Place D-Amp P.C.B. on an insulated material.
Step 2 Remove 4 screws.
high temperature after prolonged use. Touching it may
lead to injuries.
Step 1 Place D-Amp P.C.B. on an insulated material.
Step 2 Remove 4 screws.
Step 3 Lift up D-Amp P.C.B. as arrow shown.
Caution: Keep the Heatsink Spacers in safe place. Avoid
denting it, place it back during assembling.
Caution: Keep the Heatsink Spacers in safe place. Avoid
denting it, place it back during assembling.
Step 4 Desolder the pins of Digital Amplifier IC (IC5200).
Step 5 Remove Digital Amplifier IC (IC5200).
Note 1: For disassembling of Digital Amplifier IC (IC5300),
repeat (Step 1) to (Step 5) of 12.20.1.
Note 2: Refer to diagram of D-Amp P.C.B. (item 19.3) for loca-
tion of part.
Step 5 Remove Digital Amplifier IC (IC5200).
Note 1: For disassembling of Digital Amplifier IC (IC5300),
repeat (Step 1) to (Step 5) of 12.20.1.
Note 2: Refer to diagram of D-Amp P.C.B. (item 19.3) for loca-
tion of part.
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12.20.2. Assembly of Digital Amplifier IC
(IC5200/IC5300)
Step 1 Fix the Digital Amplifier IC (IC5200) onto the D-Amp
P.C.B..
Step 2 Solder the pins of Digital Amplifier IC (IC5200).
Caution: Ensure that the pins of Digital Amplifier IC
(IC5200) is positioned correctly on D-Amp P.C.B. before
soldering.
P.C.B..
Step 2 Solder the pins of Digital Amplifier IC (IC5200).
Caution: Ensure that the pins of Digital Amplifier IC
(IC5200) is positioned correctly on D-Amp P.C.B. before
soldering.
Step 3 Fix Heatsink spacers onto D-Amp Heatsink.
Caution: Ensure that Heatsink Spacers are properly
located and seated flatly onto D-Amp Heatsink.
Step 4 Apply grease to the D-Amp Heatsink as indicate in the
diagram.
Caution: Ensure Grease thickness is about 0.2mm.
Caution: Ensure that Heatsink Spacers are properly
located and seated flatly onto D-Amp Heatsink.
Step 4 Apply grease to the D-Amp Heatsink as indicate in the
diagram.
Caution: Ensure Grease thickness is about 0.2mm.
Step 5 Upset the D-Amp P.C.B..
Step 6 Fix 4 screws.
Note: For assembling of Digital Amplifier IC (IC5200) and
(IC5300), repeat the (Step 1) to (Step 6) of 12.20.2.
Step 6 Fix 4 screws.
Note: For assembling of Digital Amplifier IC (IC5200) and
(IC5300), repeat the (Step 1) to (Step 6) of 12.20.2.
12.21. Disassembly of AC Inlet P.C.B.
• Refer to “Disassembly of Top Cabinet”
Step 1 Remove 1 screw.
75
Step 2 Remove 2 screws.
Step 3 Release the Red Wire (TL10) and Black Wire (TL20)
from Wire Holder.
Caution: During assembling, ensure that Red Wire (TL10)
and Black Wire (TL20) are dressed into the Wire Holder
properly.
Step 4 Lift up the AC Inlet P.C.B..
Step 3 Release the Red Wire (TL10) and Black Wire (TL20)
from Wire Holder.
Caution: During assembling, ensure that Red Wire (TL10)
and Black Wire (TL20) are dressed into the Wire Holder
properly.
Step 4 Lift up the AC Inlet P.C.B..
Caution: During assembling, ensure that the AC Inlet
P.C.B. is properly located and fully seated onto the Bottom
Chassis.
P.C.B. is properly located and fully seated onto the Bottom
Chassis.
Step 5 Upset the AC Inlet P.C.B..
Step 6 Desolder Red Wire (TL10) and Black Wire (TL20) on AC
Inlet P.C.B..
Step 7 Remove the AC Inlet P.C.B..
Step 6 Desolder Red Wire (TL10) and Black Wire (TL20) on AC
Inlet P.C.B..
Step 7 Remove the AC Inlet P.C.B..
Caution: During assembling, replace the AC In PC Sheet
Unit if damage.
Unit if damage.
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12.22. Disassembly of SMPS P.C.B.
• Refer to “Disassembly of Top Cabinet”.
Step 1 Release catch and remove the Top Insulator.
Caution: During assembling, ensure Top Insulator fully
inserted at the bottom chassis.
Step 2 Detach 9P Bridge connector at the connector (CN2309)
on Digital P.C.B..
Step 3 Detach 4P Cable at the connector (CN5400) on D-Amp
P.C.B..
Step 4 Release the Red Wire (TL11) and Black Wire (TL21)
from Wire Holder.
Caution: During assembling, ensure that Red Wire (TL11)
and Black Wire (TL21) are dressed into Wire Holder prop-
erly.
on Digital P.C.B..
Step 3 Detach 4P Cable at the connector (CN5400) on D-Amp
P.C.B..
Step 4 Release the Red Wire (TL11) and Black Wire (TL21)
from Wire Holder.
Caution: During assembling, ensure that Red Wire (TL11)
and Black Wire (TL21) are dressed into Wire Holder prop-
erly.
Step 5 Remove 4 screws.
Step 6 Lift up the SMPS P.C.B..
Step 6 Lift up the SMPS P.C.B..
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