JBL BASS550 User manual

SERVICE MANUAL
SERVICE MANUAL
Powered Subwoofer
JBL Consumer Products Inc.
80 Crossways Park West
Woodbury, N.Y. 11797
1 800 336 4JBL in the USA
A Harman International Company
Part No.: 1112 JBLBASS550
BASS550
120 Volt & 230 Volt Versions

1
Powered Subwoofer BASS550
TABLE OF CONTENTS
Specifications .................................................................1
Features..........................................................................2
Powered Sub Test Setup...............................................2
Test Procedure...............................................................2
Block Diagram ................................................................4
Cabinet Assembl Exploded View.................................5
Packaging Exploded View .............................................5
Amplifier Exploded View ................................................6
Parts Lists.......................................................................7
Revisions ......................................................................10
Printed Circuit Boards .................................................11
Integrated Circuit Diagrams .........................................15
Schematic Diagrams ...................................................16
SPECIFICATIONS
Amplifier Power (RMS)* ........250Watts Total
35x3@0.1% THD
23x1@0.1% THD
100x1@0.1% THD
Low Frequenc Woofer (2) .......SE6H 6-1/2" Pol -Cone Woofer
Design ..............Bass Reflex Enclosure
Inputs ..............RCAPhono plugs at “Source”;
13 pin Din plug to Subwoofer
Outputs .............(4)Full range Speaker;
(1) Subwoofer
Crossover Frequenc Subwoofer (-6dB) . . . 150Hz
Frequenc Response (-6dB)
S stem .............35Hz - 20kHz
Subwoofer ............35Hz - 150Hz
External Dimensions
Height .............15-3/4" (400mm)
Width .............8-1/2" (216mm)
Depth .............20"(508mm)
Weight ..............40lbs. (18.2 kg)
JBL continuall strives to improve its products. New materials, production methods and design refinements are introduced into
existing models without notice as a routine expression of our design philosoph . For this reason, the Bass550 Subwoofer ma
differ in some respect from its published specifications and descriptions, but will alwa s equal or exceed the original
specifications unless otherwise stated.

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Powered Subwoofer BASS550
FEATURES
nThe Bass550 powered subwoofer is part of the ESC550
S stem.
nAmplifiers for five satellite speakers and subwoofer.
n100 watt output.
nVariable level control.
nLine level input exclusivel from the “Source”.
nUser friendl “auto on” circuit. Signal sensing
automaticall turns the subwoofer on so ou don't have
to; the subwoofer is meant to be left “on” without
continuall using the power switch.
TEST PROCEDURE
Equipment nee e :
nThe “Source” AM/FM turner/CD pla er w/ remote control.
nFunction/signal generator/sweep generator.
nMultimeter.
nCable - Phono plugs (RCA) and speaker cables.
nRCA Y-cable
Subwoofer, General Function
1) Connect both right and left phono jack (RCA) inputs
to signal generator and the “Source” Tape/Aux. input
jacks. Use Y-cable if necessar from mono source.
2) Connect Bass550 subwoofer to the “Source” with
supplied 13 pin Din cable.
BASS550 POWERED SUBWOOFER TEST SETUP

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Powered Subwoofer BASS550
3) Plug in subwoofer, turn power switch on; red LED
should light.
4) Turn on generator, adjust to 100 mV, 50 Hz.
5) Push “power” button on the “Source”, (displa should
now be active); press “Tape/Aux” button, adjust
volume (on Source) so displa reads “VOLUME 30”.
6) Turn up level control on subwoofer full clockwise.
7) LED on subwoofer should c cle to green; bass
response should be heard and felt from port tube
opening.
Subwoofer, Sweep Function
1) Follow steps 1-7 above, using a sweep generator as a
signal source.
2) Sweep generator from 20Hz to 300Hz. Listen to the
cabinet and drivers for an rattles, clicks, buzzes or
an other noises. If an unusual noises are heard,
remove driver and test.
Subwoofer, Driver Function
1) Remove one or both drivers from cabinet; remove +
and - wire clips.
2) Check DC resistance of driver; it should be
approximatel 5.8 ohms.
3) Connect a pair of speaker cables to driver terminals.
Cables should be connected to an integrated amplifier
fed b a signal generator. Turn on generator and
adjust so that speaker level output is 4.0V.
4) Sweep generator from 20Hz to 1kHz. Listen to driver
for an rubbing, buzzing, or other unusual noises.
System, General Function
1) Connect Bass550 subwoofer to the “Source” with
supplied 13 pin Din cable.
2) Attach all five satellite speakers to the supplied
speaker cables, terminating in a molex connector
plugged into the subwoofer.
3) Plug in Bass550 subwoofer, turn power switch on; red
LED should light.
4) Push “power” button on the “Source”; (displa should
now be active).
5) Toggle “surround mode” button on front panel or with
remote control until “NORMAL” appears.
6) Toggle “rear speaker”button on front panel until
“REAR SPEAKERS” is displa ed in upper left corner.
7) Adjust volume (on Source) so displa reads
“VOLUME 30”.
8) Using remote control, press “TONE” button.
9) White noise should be heard, c cling from Left,
Center, Right and Rear speakers in succession.
10)Press “TONE” button again to halt test.

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Powered Subwoofer BASS550
BASS550 (120v US & 230v European Versions) BLOCK DIA RAM

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Powered Subwoofer BASS550
BASS550 CABINET ASSEMBLY & PACKAGING EXPLODED VIEWS

115
115
BL-1733
INWOOD,N.Y
.11096
INWOOD,N.Y. 11096
SIGNALTRANSFORMER
SIGNAL TRANSFORMER
24
24
12
12
24
24
48
48
00
0
12 12
13 13
14 14
66
77
88
99
10 10
11 11
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Bass550 Amplifier Exploded View
Bass550
Ref # Part No. Description Qty.
1 BR1187 Alum. Bar 4.8x12.7x40mm 4
2 BR1386 Transistor Bar TO-218 2
3 BR1395 Bracket ower Support 6
4 BR1411 Bracket Support 60 Deg 1
5 BR1421 Bracket "L" 0.9"x0.9" 1
6 BR1423 Front late 1
7 BR1495 Alum. Bar 1
8 FS1078 Fuse 6A 250V 3AG Slow Blow 1
BCDAEFGHI
11
22
33
44
55
Powered Subwoofer
BCDAEFGHI
Ref # Part No. Description Qty.
9 FH1002 Fuse Holder 1/4x1-1/4 1
10 XX1174 1
WI1597
11 HS1142 Heatsink Internal 1
12 MI1151 AG ower Transformer 120v 1
M1159
13 ST1025 Round Spacer 1/2x3/8 length 6
14 SW1075 JR Switch Rocker 2 2T Snap-I 1
15 XX1259 Knob Black (not shown) 1
16 XX1269 Gasket 1
17 XX1276 lastic Cover 1
18 NU1059 Nut 4-40 Keps-Thr. Hexag. Zinc 2
19 NU1057 Nut 6-32 Keps Zinc Hexag. 2
20 NU1049 Nut 8-32x1/4 Keps Hexag. 5
21 WA1049 Washer Ext. Tooth #6 Zinc 10
22 WA1080 Washer Flat #8 Steel Zinc 5
23 XX1250 Strain Relief S T-1 Black 1
24 SC1253 Screw 4-40x3/8 an hillips 2
25 SC1274 Screw 5-20x1/4 Thread Form. Z. 6
26 SC1192 Screw 6-32x3/4 Cutt-Thr. Hex. 8
27 SC1194 Screw 6-32x3/8 Tapt-Thr Hex. 17
28 SC1282 Screw 10-32x7/8 an-Torx Hd. 6
29 S 1073 Sil ad TO-3 1/0"x0.75" 12
30 S 1072 Sil ad TO-220 0.750" 3
31 ST1024 1/4 Hex Fem. Standoff 1-1 2
32 in Interconnect Cable 1
AG AC Cord 6ft. UL/CSA aprov. 120v
332630-001 13
AG AC Cord 6ft. UL/CSA aprov. 230v 1
AG ower Transformer 230v 1
25
17
16
23
10
9
14
28
26
13
4
11
12
20
22
31
26
1
2
30
3
29
21
7
27
19
5
18
6
24
6x
6x
6x
2x
2x
2x
8
6x
5x
5x
2x
8x
4x
2x
3x
6x
12x
10x
17x
reamp & Crossover CB
ower Supply CB
ower Amp Subwoofer
CB 1166
ower Amp CB 1165
Bass550 Amplifier
Exploded View
32

115
115
BL-1733
INWOOD,N
.Y.11096
INWOOD,N.Y. 11096
SIGNALTRANSFORMER
SIGNAL TRANSFORMER
24
24
12
12
24
24
48
48
00
0
66
77
88
99
Bass550 Amplifier Exploded Vie
w
11
22
33
44
55
Powered Subwoofer
BCDAEFGHI
Ref # Part No Description Qty
25
17
16
4
11
12
20
22
31
26
1
2
30
3
29
21
7
27
19
5
18
2x
2x
6x
5x
5x
2x
8x
4x
2x
3x
6x
12x
10x
17x
Preamp & Crossover PCB
Power Supp y PCB
Power Amp Subwoofer
PCB 1166
Power Amp PCB 1165
Bass550 Amplifier
Exploded View
32

12 12
13 13
14 14
66
77
88
99
10 10
11 11
6
B
ass550 Amplifier Exploded View
Bass550
Ref # Part No. Description Qty.
1 BR1187 A um. Bar 4.8x12.7x40mm 4
2 BR1386 Transistor Bar TO-218 2
3 BR1395 Bracket Power Support 6
4 BR1411 Bracket Support 60 Deg 1
5 BR1421 Bracket "L" 0.9"x0.9" 1
6 BR1423 Front P ate 1
7 BR1495 A um. Bar 1
8 FS1078 Fuse 6A 250V 3AG S ow B ow 1
BCDAEFGHI
Ref # Part No. Description Qty.
9 FH1002 Fuse Ho der 1/4x1-1/4 1
10 XX1174 1
WI1597
11 HS1142 Heatsink Interna 1
12 MI1151 AG Power Transformer 120v 1
M1159
13 ST1025 Round Spacer 1/2x3/8 ength 6
14 SW1075 JR Switch Rocker 2P2T Snap-I 1
15 XX1259 Knob B ack (not shown) 1
16 XX1269 Gasket 1
17 XX1276 P astic Cover 1
18 NU1059 Nut 4-40 Keps-Thr. Hexag. Zinc 2
19 NU1057 Nut 6-32 Keps Zinc Hexag. 2
20 NU1049 Nut 8-32x1/4 Keps Hexag. 5
21 WA1049 Washer Ext. Tooth #6 Zinc 10
22 WA1080 Washer F at #8 Stee Zinc 5
23 XX1250 Strain Re ief SPT-1 B ack 1
24 SC1253 Screw 4-40x3/8 Pan Phi ips 2
25 SC1274 Screw 5-20x1/4 Thread Form. Z. 6
26 SC1192 Screw 6-32x3/4 Cutt-Thr. Hex. 8
27 SC1194 Screw 6-32x3/8 Tapt-Thr Hex. 17
28 SC1282 Screw 10-32x7/8 Pan-Torx Hd. 6
29 SP1073 Si Pad TO-3P 1/0"x0.75" 12
30 SP1072 Si Pad TO-220 0.750" 3
31 ST1024 1/4 Hex Fem. Standoff 1-1 2
32 Pin Interconnect Cab e 1
AG AC Cord 6ft. UL/CSA aprov. 120v
332630-001 13
AG AC Cord 6ft. UL/CSA aprov. 230v 1
AG Power Transformer 230v 1
25
17
16
23
10
9
14
28
26
13
4
19
5
18
6
24
6x
6x
6x
2x
2x
2x
8
6x
Preamp & Crossover PCB

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Powered Subwoofer BASS550
REF. NO. PART NO. DESCRIPTION QTY
Power Supply PCB 1163
Connector
CONN1 CO1335 CONNECTOR 6410 SERIES 6 T 1
-V, +V CO1347 CONNECTOR 41791 SERIES 3 2
GND CO1348 CONNECTOR 41791 SERIES 4 1
+, 1, CT(5), GND TE1175 TERMINAL MALE TAB 0 032"x0 25 4
AC(7), AC(9), TE1185 TERMINAL MALE TYPE QUICK-FIT 3
CT(8)
Capacitor
C1-4 CP1545 ALUM EL 4700uF 20% 50V 4
C5, 6, 11, 12, CP1426 SMD 0 1uF 20% 50V Z5U 12
15, 16, 19,
20, 21, 22,
23, 24
C7 CP1552 SMD 0 1uF 20% 100V Z5U 1
C8 CP1520 SMD 0 01uF 10% 50V T/R 1
C9, 10 CP1624 ALUM EL 2200uF 20% 35V 2
C13, 14, 25 CP1417 ALUM EL 22uF 20% 16V T/R 3
C17, 18 CP1424 ALUM EL 10uF 20% 16V T/R 2
C26, 27 CP1690 0 01uF 100V 2
Diodes DI1185 Main Diode Bridge 1
D1-5 DI1010 1N4002 1A/100V AXIAL 5
D6-10 DI1132 SMD 1N4148 LL-34 PKG T/R 5
ZD1 DI1129 MBZ5240B 10V ZENER 1
Fu e
F1 (120V Version) FS1078 FUSE 6A 250V 3AG SLOW BLOW 1
F1 (230V Version) FS1078 FUSE 3 15A 250V 3AG SLOW BLOW 1
F3, 4, 5 FS1055 FUSE FAST 3A/125V PICO T/R 3
F6, 7(230V Version) FS1055 FUSE FAST 3A/125V PICO 2
Integrated Circuit
IC1 IC1048 VOLTAGE REG +12V TO-220 1
IC2 IC1110 VOLTAGE REG -12V TO-220 1
IC3 IC1258 VOLTAGE REG +9V TO-220 1
Re i tor
R1, 5 RS1725 SMD 15KΩ5% 1/8W 2
R3 RS1701 SMD 10KΩ5% 1/8W 1
R4 RS1702 SMD 100KΩ5% 1/8W 1
R6 RS1703 SMD 2 2KΩ5% 1/8W 1
R7 RS1700 SMD 1KΩ5% 1/8W 2
R8 RS1706 SMD 47KΩ5% 1/8W 1
Tran i tor
Q1 TR1108 SMD NPN 2SC2412J 1
Q2 TR1125 SMD PNP 2SA1037K 1
Wire
JW1, 2, 4, WI1553 WIRE #22 BARE SOLID TINNED 6
8, 12, 13 1 FOOT
Cro over & Preamp PCB 1164
Connector
CONN1 CO1335 CONNECTOR 6410 SERIES 6 T 1
CONN2, 3, 4 CO1336 CONNECTOR 6410 SERIES 5 3
CONN5 CO1341 RIGHT ANGLE WITH PEGS 5569 1
REF. NO. PART NO. DESCRIPTION QTY
CONN6 CO1339 STR SQ 0 156" CENTER HE 1
DIN CO1337 CONNECTOR MULTI-POLE NON 1
Capacitor
C1, 1A, 1B, CP1415 ALUM EL 2 2uF 20% 4
1C
C2, 2A, 2B, 2C CP1473 SMD 220pF 10% 50V NPO 4
C3, 3A, 3B, CP1352 ALUM EL 22uF 20% 25V 6
3C, 16, 17
C4, 4A, 4B, CP1344 POLY FIL 0 33uF 10% 4
4C
C5, 5A, 5B, 5C CP1632 POLY FILM 0 033uF 5% 4
C8 CP1412 ALUM EL 47uF 20% 16V 1
C9, 11, 12 CP1495 POLY FILM 0 1uF 5% 63 3
C10 CP1534 POLY FILM 15nF 5% 63V 1
C14, 14A, 14B, CP1426 SMD 0 1uF 20% 50V Z5U 12
14C, 15, C15A,
15B, 15C, 18,
19, C20, 21
C22-25 CP1442 SMD 4 7nF 10% 100V 4
Diode
D1, 2, 3 DI1132 SMD DIODE 1N4148 LL-34 PKG 3
Intergrated Circuit
IC1, 2, 3, 4 IC1041 NJM072 DUAL J-FET OP-AMP 4
IC5 IC1162 NMJ074 QUAD J-FET OP-AMP 1
Re i tor
J1-10, 12-15, RS1779 SMD ZERO ΩJUMPER 19
18, 23, 26,
27, 32
P1 RS1794 POT 50KΩ20% LOG TAPER 1
R1, 1A-1C, 22, RS1700 SMD 1KΩ5% 1/8W 8
24, 29, 32
R2, 2A, 2B, 2C RS1706 SMD 47KΩ5% 1/8W 4
R3, 3A-3C, RS1705 SMD 4 7KΩ5% 1/8W 6
9, 26
R4, 4A-4C, 7, RS1701 SMD 10KΩ5% 1/8W 13
10, 15-17,
R21, 23, 25,
28
R5, 5A, 5C RS2282 SMD 4 32KΩ1% 1/8W 3
R5B RS1876 SMD 7 5KΩ1% 1/8W 1
R6, 6A, 6C RS2281 SMD 24 3KΩ1% 1/8W 3
R6B RS1934 SMD 15KΩ1% 1/8W 1
R8, 19 RS1767 SMD 1MΩ5% 1/8W 2
R11 RS2165 SMD 28KΩ1% 1/8W 1
R12 RS2162 F/CHIP 60 40KΩ1% 1/8W 1
R13 RS1863 SMD 9 09KΩ1% 1/8W 1
R14 RS2163 SMD 143 KΩ1% 1/8W 1
R18 RS1702 SMD 100KΩ5% 1/8W 1
R20 RS1883 SMD 1 5KΩ5% 1/8W 1
R30 RS1703 SMD 2 2KΩ5% 1/8W 1
R31 RS1711 SMD 220Ω5% 1/8W 1
R33, 35, 36 RS1872 SMD 51KΩ5% 1/8W 3
Tran i tor
Q3, 9, 11 TR1063 NPN MPS2222A TO-92 3
Q4, 5 TR1183 NPN POWER TIP31C 2
Q6, 10 TR1010 PNP MPS2907A TO-92 2
BASS550 ELECTRICAL PARTS LIST