Panasonic SB-AKX78PN User manual

© Panasonic Corporation 2014. All rights reserved.
Unauthorized copying and distribution is a violation of
law.
PSG1403012CE
Speaker System
Model No. SB-AKX78PN
SB-AKW78PN
Product Color : (K)... Black Type
TABLE OF CONTENTS PAGE PAGE
1 Specifications ----------------------------------------------------- 2
2 Disassembly and Assembly Instructions ---------------- 3
2.1. Front Speakers (SB-AKX78PN-K) -------------------- 4
2.2. Subwoofer Speaker (SB-AKW78PN-K)-------------- 7
3 Wiring Connection Diagram ---------------------------------- 9
3.1. Front Speakers (SB-AKX78PN-K) -------------------- 9
3.2. Subwoofer Speaker (SB-AKW78PN-K)-------------- 9
4 Exploded View and Replacement Parts List -----------11
4.1. Front Speakers (SB-AKX78PN-K) Cabinet
Parts Location---------------------------------------------11
4.2. Subwoofer Speaker (SB-AKW78PN-K)
Cabinet Parts Location----------------------------------12
4.3. Packaging (For SC-AKX78)----------------------------13
4.4. Packaging (For SC-AKX58)----------------------------14
4.5. Replacement Parts List ---------------------------------15

2
1 Specifications
Front Speakers (SB-AKX78PN-K)
Speaker unit(s)
Super Woofer 20 cm cone type
Woofer 8 cm cone type
Tweeter 6 cm cone type
Impedance Hight 3 Ω/ Low 3 Ω
Dimensions (W x H x D) 300 mm x 401 mm x 292 mm
Mass 6.1 kg
Subwoofer Speaker (SB-AKW78PN-K)
Speaker unit(s)
Super Woofer 25 cm Cone type
Impedance 2 Ω
Dimensions (W x H x D) 360 mm x 401 mm x 271 mm
Mass Aprox. 7.7 kg
Notes:
1. Specifications are subject to change without notice.
Mass and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum ana-
lyzer.

3
2 Disassembly and Assembly Instructions
Caution Note:
• This section describes procedures for checking the operation and replacing the main components.
• For reassembly after operation checks or replacement, reverse the respective procedures.
• Special reassembly procedures are described only when required.
• Before carrying out the disassembly process, please ensure all the safety precautions & procedures are followed.
• During the disassembly and/or assembly process, please handle with care as there may be chassis components with sharp
edges.
• During replacement of component parts, please refer to the section of “Replacement Parts List” as described in the service man-
ual.
• Select items from the following indexes when disassembly or replacement are required.
Front Speakers (SB-AKX78PN-K)
• Disassembly of Front Panel Block
• Disassembly of Tweeter Speaker (SP1)
• Disassembly of Full Range Speaker (SP2)
• Disassembly of Woofer Speaker (SP3)
Woofer Speaker (SB-AKW78PN-K)
• Disassembly of Front Panel Block
• Disassembly of Woofer Speaker (SP61)
• Disassembly of Lighting Wire P.C.B. Assembly

4
2.1. Front Speakers (SB-AKX78PN-K)
2.1.1. Disassembly of Front Panel Block
Step 1 : Remove 4 screws.
Step 2 : Insert flathead screwdriver into the grooves.
Step 3 : Apply light force to push open Front Panel Block as
arrow shown.
Step 4 : Insert a steel rule between the Front Panel Block and
Speaker Cabinet Assembly.
Step 5 : Detach Front Panel Block slightly.
Caution : Do not exert strong force as it may damage the
Front Panel Block.
Step 6 : Detach speaker wire.
Step 7 : Remove Front Panel Block.

5
2.1.2. Disassembly of Tweeter Speaker
(SP1)
• Refer to “Disassembly of Front Panel Block”
Step 1 : Remove 4 screws.
Step 2 : Remove Tweeter Speaker (SP1).
2.1.3. Disassembly of Full Range Speaker
(SP2)
• Refer to “Disassembly of Front Panel Block”
Step 1 : Remove 4 screws.
Step 2 : Slightly lift up Full Range Speaker (SP2).
Step 3 : Detach speaker wire.
Step 4 : Remove Full Range Speaker (SP2).

6
2.1.4. Disassembly of Woofer Speaker
(SP3)
• Refer to “Disassembly of Front Panel Block”
Step 1 : Remove 4 screws.
Step 2 : Slightly lift up Woofer Speaker (SP3) as shown.
Step 3 : Detach speaker wire.
Step 4 : Remove Woofer Speaker (SP3).

7
2.2. Subwoofer Speaker (SB-AKW78PN-K)
2.2.1. Disassembly of Front Panel Block
Step 1 : Remove 4 screws.
Step 2 : Insert flathead screwdriver into the grooves.
Step 3 : Apply light force to push open Front Panel Block as
arrow shown.
Step 4 : Insert a steel rule between the Front Panel Block and
Speaker Cabinet Assembly.
Caution : Do not exert strong force as it may damage the
Front Panel Block.
Step 5 : Detach Front Panel Block slightly.
Caution : Do not exert strong force as it may damage the
wiring within.
Step 6 : Lift up himelon.
Caution : Replace himelon if they are torn during disas-
sembling.
Step 7: Detach 2P Socket.
Step 8 : Remove Front Panel Block.

8
2.2.2. Disassembly of Woofer Speaker
(SP61)
• Refer to “Disassembly of Front Panel Block”
Step 1 : Remove 4 screws.
Step 2 : Slightly lift up Woofer Speaker (SP61) as shown.
Step 3 : Detach speaker wire.
Step 4 : Remove Woofer Speaker (SP61).
2.2.3. Disassembly of Lighting Wire
P.C.B. Assembly
• Refer to “Disassembly of Front Panel Block”
Step 1 : Remove 2 screws.
Step 2 : Remove P.C.B. Cover.
Step 3 : Remove 2 screws.
Step 4 : Release 4P wire from Front Panel Block.
Caution : During assembling, inserted the 4P wire into the
opening of Front Panel Block as diagram shown.
Step 5 : Remove Lighting Wire P.C.B. Assembly.

9
3 Wiring Connection Diagram
3.1. Front Speakers (SB-AKX78PN-K)
3.2. Subwoofer Speaker (SB-AKW78PN-K)

10