Panasonic SB-PM54GN User manual

Type 3 way, 3 speaker system
Speaker (s)
Woofer 10 cm cone type (6 Ω)
Tweeter 6 cm cone type (6 Ω)
Super tweeter 2.5 cm piezo type
Impedance 6Ω
Input power (IEC)
High 90 W (Max)
Low 90 W (Max)
Output sound pressure 80 dB/W (1.0 m)
Crossover frequency 2.2 kHz
Frequency range 45 Hz to 35 kHz (-16 dB)
1 System Combination 3
1.1. System Breakdown 3
2 Assembling and Disassembling 4
2.1. Disassembly flow chart 4
2.2. Disassembly of Net frame assembly 5
2.3. Disassembly of Front Panel 5
2.4. Disassembly of Piezzo ornament 6
2.5. Disassembly of Tweeter 7
©2007 Matsushita Electric Industrial 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 the speakers refer to
High frequency and Low speakers refer to High frequency and Low
frequency.
2.6. Disassembly of Woofer 8
2.7. Assembly of Speaker Unit 9
3 Connection of the Speaker Cables 10
4 Connection of the Wiring Diagram 11
5 Exploded view 12
5.1. Cabinet Parts Location 12
5.2. Packaging 13
Speaker System
Specification
CONTENTS
Page Page
ORDER NO. MD0702005CE

6 Replacement Parts List 14
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SB-PM54GN

1 System 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
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SB-PM54GN

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.
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SB-PM54GN

2.2. Disassembly of Net frame
assembly
Note: The disassembly process illustrates left speaker only. For
right speaker, the disassembly process 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.
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SB-PM54GN

Step 3: Insert a flathead screwdriver into the groove of the front
panel as shown. Ensure that the screwdriver is above the small
steel rule.
Step 4: 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.
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SB-PM54GN

Step 3: Remove glue from piezzo ornament.
2.5. 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.
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SB-PM54GN

2.6. Disassembly of Woofer
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.
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SB-PM54GN

2.7. Assembly of Speaker Unit
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.
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SB-PM54GN

· Be sure to connect speaker cables before connecting the
AC power supply cord.
· The load impedance of any speaker used with this unit must
be 6 Ω.
· Be sure to connect the cable from the right speaker to the
right terminal and the cable from the left speaker to the left
terminal.
1. Twist and pull off the vinyl tip of the speaker cords. If the
speaker cords do not have vinyl tips, connect them directly
to the terminals. Make sure the bare ends of the wires are
not unravelled.
2. Insert the wire to the rear panel of the unit and close the
lever.
Notes :
· To prevent damage to circuitry, never short-circuit positive
(+) 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 negatively affected.
Note
· Keep your speakers at least 10 mm away from the system
for proper ventilation.
· These speakers do not have magnetic shielding. Do not
place them near televisions, personal computers or other
devices easily influenced by magnetism.
· To avoid damage to the speakers, do not touch the speaker
cones if you have taken the nets off.
Connection
3 Connection of the Speaker Cables
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SB-PM54GN