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2 Assembling and Disassembling

“ATTENTION SERVICER”

Some chassis components may have sharp edges. Be careful when disassembling and servicing.

 1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main

components.

 2. For reassembly after operation checks or replacement, reverse the respective procedures.

Special reassembly procedures are described only when required.

 3. Select items from the following index when checks or replacement are required.
 4. Refer to the Parts No. on the page of “Parts Location and Replacement Parts List” (Section 6), if necessary.

Below is the list of disassembly sections

    

·

    

Disassembly of Net frame assembly

    

·

    

Disassembly of Front panel

    

·

    

Disassembly of Piezzo ornament

    

·

    

Disassembly of Tweeter

    

·

    

Disassembly of Woofer

2.1. Disassembly flow chart

The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the
servicing.
To assemble the unit, reverse the steps shown in the chart as below.

4

SB-PM54GN

Summary of Contents for SA-PM54

Page 1: ... Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law SB PM54GN Colour M Wood Type 50 Hz to 31 kHz 10 dB Dimensions W x H x D 144 x 249 x 200 mm Mass 2 0 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 analyzer 3 The labels HIGH and LOW on the rear or...

Page 2: ...6 Replacement Parts List 14 2 SB PM54GN ...

Page 3: ...m Combination 1 1 System Breakdown Note The table below show the breakdown for speaker combinations used in main unit systems System SC PM54GN K Music center SA PM54GN K Speaker system SB PM54GN M 3 SB PM54GN ...

Page 4: ...required 3 Select items from the following index when checks or replacement are required 4 Refer to the Parts No on the page of Parts Location and Replacement Parts List Section 6 if necessary Below is the list of disassembly sections Disassembly of Net frame assembly Disassembly of Front panel Disassembly of Piezzo ornament Disassembly of Tweeter Disassembly of Woofer 2 1 Disassembly flow chart T...

Page 5: ...is the same Step 1 Remove net frame assembly as arrow shown Step 2 Remove 4 net holders 2 3 Disassembly of Front Panel Follow step 1 in item 2 2 Step 1 Remove 4 screws Step 2 Insert a small steel rule into the grooves of the front panel and lift up to make a gap allowance between the front panel and rear cabinet as arrow shown 5 SB PM54GN ...

Page 6: ... At the boss area push up to open the bosses as arrow shown Caution Do not exert strong force as it may damage front panel 2 4 Disassembly of Piezzo ornament Follow step 1 in item 2 2 Follow step 1 to step 4 in item 2 3 Step 1 Remove 2 screws Step 2 Insert the steel rule in between the piezzo ornament and rear cabinet as arrow shown 6 SB PM54GN ...

Page 7: ... Disassembly of Tweeter Follow step 1 in item 2 2 Follow step 1 to step 4 in item 2 3 Step 1 Remove 4 screws Step 2 Insert the steel rule in between the tweeter and rear cabinet as arrow shown Step 3 Detach the black and black wires 7 SB PM54GN ...

Page 8: ...ofer Follow step 1 in item 2 2 Follow step 1 to step 4 in item 2 3 Step 1 Remove 4 screws Step 2 Insert the steel rule in between the woofer and rear cabinet as arrow shown Step 3 Detach the red and black wires 8 SB PM54GN ...

Page 9: ... Step 1 Scrape off using the scriber and clean up the remaining glue at the 8 bosses and 8 holes of the front panel and rear cabinet and replace with new glue Step 2 Fix the front panel firmly back to the rear cabinet 9 SB PM54GN ...

Page 10: ...ive and negative speaker wires Be sure to connect only positive red gray wires to positive terminals and negative black blue wires to negative terminals Placement of speakers Place the speakers so that the tweeter is on the inside Use only the supplied speakers The combination of the main unit and speakers provide the best sound Using other speakers can damage the unit and sound quality will be ne...

Page 11: ...4 Connection of the Wiring Diagram 11 SB PM54GN ...

Page 12: ...5 Exploded view 5 1 Cabinet Parts Location SB PM54GN 12 ...

Page 13: ...5 2 Packaging SB PM54GN 13 ...

Page 14: ... L M 1 RFKHBPM54GNR SPEAKER CAB ASS Y R M 2 RYBV0048 K NET FRAME ASSY M 3 RGKX0372 K PIEZZO ORNAMENT M 4 RGNV0299 SPEC LABEL M 5 RGPX0254 K FRONT PANEL L M 5 RGPX0255 K FRONT PANEL R M 6 RHD40019 S SCREW M 7 RKA0072 KJ LEG CUSHION M 8 RMG0520 K NET HOLDER M 9 RMQ1485 EVA PACKING TWEETER M 10 RMQ1496 EVA PACKING WOOFER M 11 XTB4 16AFJK SCREW STAND M CAPACITOR C1 ECA1HAY4R7S 4 7uf 50V M PACKING MATE...

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