Bose 500PM Service Manual Download Page 9

9

Figure 2. Model 500PM Loudspeaker Test

Setup Diagram

Note: Refer to Figure 1. Model 500PM
Driver Wiring Diagram, for the following
procedure.

1. Phase Test

1.1 Remove the speaker grille using
Disassembly/Assembly procedure 1.

1.2 Observing polarity, apply an +8Vdc
level to the input terminals on the rear of
the loudspeaker. The drivers should move
outward.

1.3 Replace the grille using procedure 2.

Note: Refer to Figure 2. Model 500PM
Loudspeaker Test Setup Diagram, for the
following tests.

2. Rub and Tick Test

2.1 Remove the grille using procedure 1.

2.2 Apply a 6Vrms, 60Hz signal to the input
terminals on the rear of the speaker
cabinet.

2.3 Listen carefully for any buzzes, rattles,
or other extraneous noises from the drivers
or trim parts.

TEST PROCEDURES

Note: There is a normal suspension noise.
To distinguish between a rub or a tick and
suspension noise, displace the driver cone
slightly with a finger.  If the noise stays the
same, it is suspension noise.

2.4 Replace the grille using procedure 2.

3. Air Leak Test

3.1 Remove the grille using procedure 1.

3.2 Apply a 6Vrms, 60Hz signal to the
input terminals on the rear of the speaker
cabinet.

3.3 Test duration should be 15 seconds
minimum.

3.4 Listen carefully for air leaks along all
glue joints, at the binding post connector,
and at transducer mounting locations.  Air
leaks will be heard as a hissing or sputter-
ing sound. All repairs must be hidden.

3.5 Replace the grille using procedure 2.

4. Power Sweep Test

4.1 Apply a 6Vrms, 10Hz signal to the input
terminals on the rear of the speaker
cabinet. Leave the speaker port open.

4.2 Sweep the input frequency from 10Hz
to 5kHz, and then back down to 10Hz.

Note: The whooshing noise from the port
at approximately 60Hz  is acceptable.

4.3 Replace any transducer that has a
buzzing noise. There shall not be any
buzzes or rattles from the internal
connecting wires or components.
Redress any buzzing wires.

Power Amplifier

Frequency
Generator

Loudspeaker

+

-

+

-

+

-

+

-

-

+

DMM

Summary of Contents for 500PM

Page 1: ...Model 500PM Loudspeaker Service Manual 1998 Bose Corporation Part Number 197275 REV 00...

Page 2: ...sover PCB Topside Component and Etch Layout Diagram 15 Figure 6 Model 500PM Loudspeaker Crossover PCB Bottom Side Etch Layout Diagram 16 Figure 7 Model 500PM Loudspeaker SmartProtect Crossover Assembl...

Page 3: ...n or heel straps that connect to conductive floor mats Avoid touching the leads or contacts of ESDS devices or PC boards even if properly grounded Handle boards by the edges only Transport or store ES...

Page 4: ...Impedance 6 nominal 4 8 minimum from 20Hz to 20kHz Power Handling 200W 34 6Vrms continuous per IEC 268 5 Sensitivity 85dB SPL 1W 1m free field per IEC 268 5 for octave band centered at 400Hz SmartProt...

Page 5: ...by R6 and C6 AC voltage divider R15 R14 and C7 defines the frequency dependent threshold of current protection The protection portion of the circuit works as follows When monostable multivibrator Q2 Q...

Page 6: ...ome free 3 4 Note the driver wiring color code and cut the wires from the harness assembly 3 as close to the terminals as possible 4 StarDriver replacement 4 1 Observing polarity solder the wires from...

Page 7: ...e woofer assembly in series Retain it for use on the replacement woofer assembly 6 Woofer Replacement 6 1 Using the wiring diagram solder the blue and red wires to the correct terminals on the woofer...

Page 8: ...abinet 7 2 Gently pull the binding post connector straight out of the speaker cabinet until you see the crossover assembly 8 7 3 Angle the binding post connector so that the crossover assembly can be...

Page 9: ...cone slightly with a finger If the noise stays the same it is suspension noise 2 4 Replace the grille using procedure 2 3 Air Leak Test 3 1 Remove the grille using procedure 1 3 2 Apply a 6Vrms 60Hz...

Page 10: ...87233 001 3 7 CONN BINDING POST GREY 187232 003 1 8 CROSSOVER ASSY 500PM 189781 1 9 SCREW HILO 6 X 375 PAN XREC 175972 06 4 10 GASKET WOOFER 6 5 104794 08 2 11 WOOFER ASSY 5 25 DUAL 189824 001 2 12 BE...

Page 11: ...1 10 19 8 18 7 9 2 20 12 14 6 5 4 1 13 16 20 2X 2X 8X 6X DETAIL A 4X 4X 2X 2X 2X 12X 3X 3X 6X 2X DETAIL A TYPICAL INSERT ASSEMBLY SCALE 1 1 REF REF REF REF 15 15 15 2 2 2 Figure 3 Model 500PM Loudspea...

Page 12: ...1 4W 5 120968 1055 R4 5 20K CF 1 4W 5 120968 2035 R6 8 11 12 51K CF 1 4W 5 120968 5135 R7 19 3 3K CF 1 4W 5 120968 3325 R9 10 270K CF 1 4W 5 120968 2745 R13 1 5K CF 1 4W 5 120968 1525 R14 2 7K CF 1 4...

Page 13: ...09 1 L1 130uH 17 FERRITE 189787 1 L2 0 8mH 189783 1 L3 500uH 173008 1 PTC1 POLYSWITCH 60V 4MM 190348 1 1 PTC2 3 POLYSWITCH 60V 4MM 191995 1 2 W1 2 CONN TERMINAL 1 POS FEMALE 147946 2 CLIP HEATSINK 18...

Page 14: ...eaker Packing View PACKING LIST Model 500PM Loudspeaker see Figure 4 1 3 1 2 2X Item Number Description Part Number Qty Note 1 PACKING END CAP 500PM 189770 2 2 BAG POLY 13 5x33 5x9 13 3mil 106595 2 3...

Page 15: ...Figure 5 Model 500PM Loudspeaker Crossover PCB Topside Component and Etch Layout Diagram 15...

Page 16: ...Figure 6 Model 500PM Loudspeaker Crossover PCB Bottom Side Etch Layout Diagram 16...

Page 17: ...Z TP19 Z TP32 Z TP18 Z 2SC536K E Q7 3 2 1 Q9 IRLI540N G S D C7 047 R15 1 2K TP14 Z TP13 Z TP12 Z TP11 Z TP10 Z TP9 Z TP8 Z TP7 Z TP6 Z D3 1N4148 TP5 Z PTC1 0 25A RXE025 R9 270K TP28 Z 2SC536K E Q6 2S...

Page 18: ...FICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE Bose Corporation The Mountain Framingham Massachusetts USA 01701 P N 197275 REV 00 08 98 FOR TECHNICAL ASSISTANCE OR PART ORDERS CALL 1 800 367...

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