JBL BASS15 User manual

SERVICE MANUALSERVICE 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-JBLBASS15/16
BASS15/16

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Powered Subwoofer BASS15/16
TABLE OF CONTENTS
Specifications .................................................................1
Features..........................................................................1
Powered Sub Test Setup...............................................2
Test Procedure...............................................................3
Bass15 Block Diagram...................................................4
Bass16 Block Diagram...................................................5
Bass15 (120V) Amplifier Exploded View.......................6
Bass16 (120V) Amplifier Exploded View .....................7
Bass16 (230V) Amplifier Exploded View .....................8
Bass15/16 Speaker Cabinet Assy Exploded View.......9
Bass15 Parts Lists .......................................................10
Bass16 Parts Lists .......................................................12
SCS115 & MUSIC 15 Packaging Views .....................14
Bass15 Printed Circuit Boards ...................................15
Bass16 Printed Circuit Boards ...................................17
Integrated Circuit Diagram ...........................................19
Bass15 (120v version) Schematic Diagram ...............20
Bass16 (120v version) Schematic Diagram ...............21
Bass16 (230v version) Schematic Diagram ...............22
SPECIFICATIONS
BASS 15/16
Amplifier Power (RMS) ...............100Watts
Low Frequency Woofer (2).............61/2" drivers, polypropylene
Design...........................Bass reflex enclosure, Grey or White
Inputs ...........................Speaker Level input
Outputs ..........................Full Range Speaker
Crossover Frequency ................150Hz
Frequency Response ................40Hz - 150Hz (+/-3dB)
External Dimensions (Inches)
Height ...........................15-3/4"
Width............................8-1/2"
Depth ...........................19-3/4"
External Dimensions (mms)
Height ...........................400
Width............................216
Depth ...........................502
Weight...........................35lbs (15.9kg)
FEATURES
nThe Bass15/16 powered subwoofer is part of the SCS
115 or MUSIC 15 System.
n100 watt output.
nVariable level control.
nSpeaker level inputs, outputs for full range satellite
speakers.
nUser friendly auto on circuit. Signal sensing
automatically turns the subwoofer on so you don’t have
to; the subwoofer is meant to be left on without
continual use of the power switch.

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Powered Subwoofer BASS15/16
BASS 15 POWERED SUB WOOFER TEST SETUP
(setup for Bass 15 & 16 are the same)
JBL continually 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 philosophy. For this reason, Bass Series loudspeakers
may differ in some respect from their published specifications and descriptions, but will always equal or exceed the original
specifications unless otherwise stated.

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Powered Subwoofer BASS15/16
TEST PROCEDURE
Equipment Needed:
nFunction generator/signal generator/sweep generator
nIntegrated Amplifier
nMultimeter
nSpeaker cables
UUT = Unit Under Test
General Function
1. Connect two pairs of speaker cables to high level input terminal on UUT. Cables should be co
Driver Function
1. Remove one or both drivers from cabinet; remove + and - wire clips.
2. Check DC resistance of driver.
Bass15 should be approximately 5.5 ohms.
Bass16 should be approximately 5.8 ohms.
3. Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier fed
by a signal generator. Turn on generator and adjust so that speaker level output is 5.0V.
4. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing or other unusual noises.
SERVICE NOTE (120v Version only)
Even though the Bass15 and 16 seem to have an on/off power switch, in fact the switch does not switch
the main power off to the amp assembly, even in the OFF position. All AC and DC voltages within the
amplifier are still active, so for safety concerns the AC power cord should be unplugged before any
servicing begins.

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Powered Subwoofer BASS15/16
BASS 15 (120v US Version) BLOCK DIAGRAM

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Powered Subwoofer BASS15/16
BASS 16 (120v US & 230v European Versions) BLOCK DIAGRAM

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Powered Subwoofer BASS15/16
BASS 15 AMPLIFIER EXPLODED VIEW

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Powered Subwoofer BASS15/16
BASS 16 (120v version) AMPLIFIER EXPLODED VIEW

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Powered Subwoofer BASS15/16
BASS 16 (230v version) AMPLIFIER EXPLODED VIEW

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Powered Subwoofer BASS15/16
BASS 15 & 16 SPEAKER CABINET ASSEMBLY EXPLODED VIEW

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Powered Subwoofer BASS15/16
MECHANICAL PARTS LIST
REF. NO. PART NO. DESCRIPTION QTY
1 BR1187 ALUM. BAR 4.8mmx12.7mmx40m 1
2 HS1102 HEAT SINK BASS15 1
3 FH1002 FUSE HOLDER 1/4x1-1/4 CHAS 1
4 SEE FUSES
5 LB1269 LABEL FOR HEATSINK FOR BASS15 1
7 MS1004 SILICONE GREASE #340 DOW
8 PM1366 GASKET FOR BASS20/15 1
9 TE1125 TERMINAL ULTRA FAST INS. 2
10 WI1637 WIRE #18 BLUE/WHITE TRACER 0.25FT
11 SC1194 SC 6-32x7/8 CUTT-THR HEX 1
12 WA1049 WASHER EXT. TOOTH #6 ZINC 3
13 XX1250 STRAIN RELIEF SPT-1 BLACK 1
15 SC1215 SC M3x1.25x10 PLAS-THR PAN 4
17 XX1174 AC CORD. 6FT UL/CSA APRO. 1
18 SP1020 SIL FOAM 3/8"Lx1/4"Wx3/16" 1
19 SP1073 SIL PAD TO-3P 1.0"x0.75" 2
20 XX1257 COVER PLASTIC JBL BASS15/20 1
21 XX1259 KNOB BLACK CUSTOM 1
22 SC1194 Sc 6-32x3/8 TAPT-THR HEX W 2
23 WA1032 WASHER PLAIN #6 ZINC FINISH 3
CT, LINE1, TE1175 TRMNL MALE TAB 0.032"x0.250" 3
LINE2
SPK1, SPK2 C01256 JACK SPEAKER QUAD PC 2
ELECTRICAL PARTS LIST
Capacitors
C1, C2 CP1545 CAP ALUM EL 4700uF 20% 50 2
C3, 20 CP1473 CAP CERAMIC 220pF 50V 2
C4, 24, 30, CP1415 CAP ALUM EL 2.2uF 20% 50V 6
31, 32,
33
C5 CP1528 SMD CAP 0.1uF 10% 50V X7R 1
C7 CP1578 CAP CERAMIC 0.1uF 10% 50V 1
C8, 10, 13 CP1552 SMD CAP 0.1uF 20% 100V Z5U 3
C9, 12 CP1417 CAP ALUM EL 22uF 20% 16V 2
C11 CP1495 CAP POLY FILM 0.1uF 5% 63V 1
C14, 16 CP1426 SMD CAP 0.1uF 20% 50V Z5U 2
C15 CP1621 SMD CAP 1.8nF 10% 100V X7R 1
C19, 28 CP1645 CAP AL EL 22uF 20% 63V 85 2
C21 CP1478 SMD CAP 330pF 5% 100V NPO 1
C22 CP1475 SMD CAP 33pF 5% 50V NPO 12 1
C23 CP1411 CAP ALUM EL 100uF 20% 16V 1
C1P CP1495 CAP POLY FILM 0.1uF 5% 63V P 1
REF. NO. PART NO. DESCRIPTION QTY
Diodes
CR1, 2, 3, DI1005 RECTIFIER 3A/200V 1N5401 4
4
D1, 2, 3, DI1132 SMD SWCH LL-34 PKG 1N4148 5
4, 5
Z1, 2 DI1150 SMD ZENER 15V 5% CP PKG 2
Fuses
F1(120V) FS1063 FAST BLOW 3A 250V 3AG 1
Integrated Circuits
IC1, 2, 3, IC1041 IC SMD DUAL J-FET NJM072B 5
4, 5 OP AMP
Resistors
J1, 2, 3, 4, RS1779 SMD RES ZERO ΩJUMPER 12 P 8
5, 6, 7,
10
R1, 2, 4, 5, RS1702 SMD RES 100KΩ5% 1/8W 12 P 6
42, 46
R3, 8, 14, RS1701 SMD RES 10KΩ5% 1/8W 120 12
18, 21,
23, 39,
45, 50,
52, 53,
54
R6, 7, 31 RS1700 SMD RES 1KΩ5% 1/8W 12 3
R9 RS1962 SMD RES 61.9KΩ1% 1/8W 120 P 1
R10 RS2081 SMD RES 121KΩ1% 1/8W 12 P 1
R11 RS1800 SMD RES 150KΩ5% 1/8W 12 P 1
R12 RS1716 SMD RES 33KΩ5% 1/8W 120 1
R16, 49 RS1715 SMD RES 5.6KΩ5% 1/8W 1 P 2
R17 RS1883 SMD RES 1.5KΩ5% 1/8W 12 P 1
R19 RS1878 SMD RES 10Ω5% 1/8W 120 P 1
R20, 40 RS1829 SMD RES 160Ω5% 1/8W 12 P 2
R22, 33, 34 RS1705 SMD RES 4.7KΩ5% 1/8W 12 P 3
R24, 47, 55 RS1767 SMD RES 1MΩ5% 1/8W 120 P 3
R25 RS1831 SMD RES 7.5KΩ5% 1/8W T/ P 1
R26, 28 RS1717 SMD RES 100Ω5% 1/8W 12 P 2
R29 RS1790 RES F/CHIP 2.67kΩ1% 1
R30 RS1711 SMD RES 220Ω5% 1/8W 12 P 1
R35 RS1912 SMD RES 11KΩ5% 1/8W 120 P 1
R37 RS1703 SMD RES 2.2KΩ5% 1/8W 12 P 1
R43, 44 RS1968 SMD RES 2.2MΩ5% 1/8W 12 P 2
R48 RS1710 SMD RES 3.3KΩ5% 1/8W 12 P 1
R51 RS1992 SMD RES 390Ω, 1%, 1/8W, 1206 1
R56 RS1722 SMD RES 392Ω1% 1/8W 12 P 1
R1P, R2P RS1868 RES. W/W 0.1Ω5W 5% RAD P 2
R5P, 6P RS1916 RES. C/F 5.1Ω5% 1/4W T/ P 2
R7P RS1245 RES. C/F 220Ω5% 1/4W T P 1
BASS 15 PARTS LIST

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Powered Subwoofer BASS15/16
REF. NO. PART NO. DESCRIPTION QTY
Transistors
Q1 TR1135 PNP Transistor RXT2907 1
Q2 TR1108 SMD NPN Transistor 2SC2412 1
Q4 TR1134 NPN Transistor RXT2222 1
Q5 TR1167 NPN Transistor 2N5551 1
Q6 TR1131 SMD NPN Transistor DTC114TK 1
Q7 TR1063 NPN Transistor MPS2222 1
Q8 TR1166 PNP Transistor 1
Q1P TR1057 NPN Transistor TIP35E 1
Q2P TR1061 PNP TransistorTIP36E 1
Q3P TR1184 PNP Transistor TIP32E 1
Q4P TR1183 NPN Transistor TIP31E 1
Miscellaneous
L1 SA0000042 AIR CORE INDUCTOR 1.8uH 1
LED1 LE1032 LED BICOLOR RED/GREEN 5mm 1
POT1 RS1794 RES. POT 50KΩ20% LOG TAP P 1
SW1 SW1070 SWITCH SLIDE SP3T RIGHT 1
TRIAC TY1001 MAC224-4 TRAIC 1
XFORMER MI1128 POWER TRANSFORMER BASS15 1
Date Rev. No. Changes Made
3/21/96 1
R9 changed from 4.3K to 62K
R10 changed from 56k to 120k
R29 changed from 1.8K to 4.7K
R51 changed from 33K to 240K
C7 changed from 2.2 µFto.1µF radial
C15 changed from .022 µF to 1800 ρF
C11 changed from .22 µFto.1µF poly
6/20/96 2 ?
6/20/96 3
R11 changed from 27K to 150K
R12 changed from 51K to 33K
R39 changed from 47K to 10K
R54 changed from 47K to 10K
R22 changed from 15K to 4.7K
R34 changed from 15K to 4.7K
R33 changed from 4.3K to 4.7K
C19 changed from 22 µF/16V to 22 µF/63V
C28 changed from 22 µF/16V to 22 µF/63V
Date Rev. No. Changes Made
6/20/96 3 continued
R20 changed from 220 to 160
R40 changed from 220 to 160
R5P changed from 10 to 5.1
R6P changed from 10 to 5.1
7/29/96 4
R29 was changed to 2.7K
R9 was changed to 62K
R51 was changed to 390K
R10 was changed to 120K
C7 was changed to 0.1 µF 10%
R29 was added from 2.67K 1%
R9 was added from 51.9K 1%
R51 was added from 392K 1%
R10 was added from 121K 1%
REVISIONS (Bass15/16)

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Powered Subwoofer BASS15/16
BASS 16 PARTS LIST
MECHANICAL PARTS LIST
REF. NO. PART NO. DESCRIPTION QTY
1 BR1187 ALUM. BAR 4.8mmx12.7mmx40m 1
2 HS1102 HEAT SINK BASS15 1
3 FH1002 FUSE HOLDER 1/4x1-1/4 CHAS 1
7 MS1004 SILICONE GREASE #340 DOW
8 PM1366 GASKET FOR BASS20/15 1
11 SC1194 SC 6-32x7/8 CUTT-THR HEX 3
12 WA1049 WASHER EXT. TOOTH #6 ZINC 3
13 XX1250 STRAIN RELIEF SPT-1 BLACK 1
15 SC1215 SC M3x1.25x10 PLAS-THR PAN 4
16 MD0105011 POWER MODULE BASS15 1
18 SP1020 SIL FOAM 3/8"Lx1/4"Wx3/16" 1
19 SP1073 SIL PAD TO-3P 1.0"x0.75" 2
20 XX1257 COVER PLASTIC JBL BASS15/20 1
21 XX1259 KNOB BLACK CUSTOM 1
23 LB1291 LABEL FOR HEATSINK BASS16 (120V) 1
24 SA0116121 MAIN PCB ASSEMBLY 1
25 HA1085 AC CORD. 6FT UL/CSA APRO. 1
26 HS1151 HEAT SINK, JBL, SUBWOOFER, BASS16 1
27 FH1003 FUSE HOLDER 5x20mm 1
29 SC1192 SC 6-32x3/4 TAPT-THR HEX 1
31 LB1293 LABEL FOR HEATSINK BASS16 (230V) 1
32 SA0116231 MAIN PCB ASSEMBLY (230V) 1
33 HA1099 AC CORD. 6FT UL/CSA APRO. (230V) 1
34 SC1194 SC 6-32x3/8 CUTT-THR HEX 4
35 WA1032 WASHER PLAIN #6 ZINC FINISH 4
CT, LINE1, TE1175 TRMNL MALE TAB 0.032"x0.250" 3
LINE2
SPONGE SP1082 SPONGE W/ADHESIVE L=1/4", W=1/4" 2
Thick=3/16"
SPK1, SPK2 C01256 JACK SPEAKER QUAD PC 2
LB1265 BAR CODE TRACEABILITY LABEL 2
ELECTRICAL PARTS LIST
REF. NO. PART NO. DESCRIPTION QTY
Capacitors
C1, C2 CP1545 CAP ALUM EL 4700uF 20% 50 2
C2P, 3P CP1480 SMD CAP 470pF 5% 100v NPO 2
C3, 20 CP1473 SMD CAP 220pF 10% 50V 2
C4, 24, 30, CP1415 CAP ALUM EL 2.2uF 20% 50V 6
31, 32,
33
C5, 7, 11 CP1495 CAP POLY FILM 0.1uF 5% 63V 3
REF. NO. PART NO. DESCRIPTION QTY
C6, 5P, 17 CP1579 CAP ALUM EL 33uF 20% 16V NP 3
C8, 10, 13 CP1552 SMD CAP 0.1uF 20% 100V Z5U 4
4P
C9, 12, 27 CP1417 CAP ALUM EL 22uF 20% 16V 4
29
C14, 16 CP1426 SMD CAP 0.1uF 20% 50V Z5U 2
C15 CP1534 SMD POLY FILM 15nF 5% 63V 1
C19, 28 CP1645 CAP AL EL 22uF 20% 63V 85 2
C21 CP1478 SMD CAP 330pF 5% 100V NPO 1
C22 CP1475 SMD CAP 33pF 5% 50V NPO 12 1
C23 CP1411 CAP ALUM EL 100uF 20% 16V 1
CIP CP1528 SMD CAP 0.1uF 10% 50V X7R 1
CX1, X2, CP1844 SMD CAP CERAMIC 0.01uF 10% 4
X3, X4 200V X7R 1206 T/R
Diodes
CR1-4 DI1005 DIODE 3A/200V 1N5401 4
D1-5 DI1132 SMD DIODE 1N4148 5
Z1, 2 DI1150 SMD ZENER 15V 5% CP PKG 2
Fuses
F1 (120V) FS1063 FUSE FAST BLOW 3A 250V ACG 1
F1 (230V) FS1067 FUSE FAST BLOW 2A 250V ACG 1
F2 870-5460 SLO-BLOW 6A GMC 5x20mm 250V 1
Integrated Circuits
IC1, 2, 3, IC1041 IC SMD DUAL J-FET NJM072B 5
4, 5 OP AMP
Resistors
J1-16 RS1779 SMD RES ZERO ΩJUMPER 120 P 16
R1, 2, 4, 5, RS1702 SMD RES 100KΩ5% 1/8W 120 P 9
11, 24,
46, 57,
58
R1P, R2P RS1868 RES. W/W 0.1Ω5% 5W 2
R3, 8, 14, RS1701 SMD RES 10KΩ5% 1/8W 120 15
18, 21,
23, 27,
32, 38,
39, 45,
50, 52,
53, 54
R3P RS1994 RES C/F 100Ω5% 1/4W T/R 1
R5P, 6P RS1916 RES. C/F 5.1Ω5% 1/4W T/R 2
R6, 7, 31 RS1700 SMD RES 1KΩ5% 1/8W 120 3
R7P RS1245 RES. C/F 220Ω5% 1/4W T/R 1
R9 RS1962 SMD RES 28KΩ1% 1/8W 120 P 1
R10 RS2162 RES F/CHIP 60.40KΩ1% 1/8W 120 P 1
R12 RS1716 SMD RES 33KΩ5% 1/8W 120 1

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Powered Subwoofer BASS15/16
REF. NO. PART NO. DESCRIPTION QTY
R16, 42, 48, RS1710 SMD RES 3.3KΩ5% 1/8W 1206 P 4
49
R17 RS1883 SMD RES 1.5KΩ5% 1/8W 120 P 1
R19 RS1878 SMD RES 10Ω5% 1/8W 120 P 1
R20, 40 RS1829 SMD RES 160Ω5% 1/8W 12 P 2
R22, 33, 34 RS1705 SMD RES 4.7KΩ5% 1/8W 12 P 3
R25 RS1831 SMD RES 7.5KΩ5% 1/8W T/ P 1
R26, 28, 4P RS1717 SMD RES 100Ω5% 1/8W 1206 P 3
R29 RS1863 SMD RES 9.09KΩ1% 1/8W 1206 1
R30 RS1711 SMD RES 220Ω5% 1/8W 12 P 1
R35 RS1912 SMD RES 11KΩ5% 1/8W 1206 P 1
R36, 41 RS2180 RES M/O 470Ω5% 1W 2
R37 RS1703 SMD RES 2.2KΩ5% 1/8W 1206 P 1
R43, 44 RS1968 SMD RES 2.2MΩ5% 1/8W 1206 P 2
R47, 55 RS1767 SMD RES 1MΩ5% 1/8W 120 P 2
R51 RS2163 SMD RES 143KΩ1% 1/8W 1206 P 1
R56 RS1722 SMD RES 470KΩ5% 1/8W 1206 P 1
Transistors
Q1, 8 TR1166 PNP Xster 2N5401 2
Q1P TR1057 TRANSISTOR NPN TIP35C 1
Q2 TR1108 SMD Xster NPN 2SC2412K 1
Q2P TR1061 PNP Pwr Xster TIP36C 1
Q3P TR1184 PNP Pwr Xster TIP32C 1
Q4, 5 TR1167 NPN Xster 2N5551 2
Q4P TR1183 NPN Pwr Xster TIP31C 1
Q6 TR1131 SMD Xster NPN DTC114TK 1
Q7 TR1063 NPN Xster MPS2222A 1
Miscellaneous
L1 SA0000042 AIR CORE INDUCTOR 1.8uH 1
LED1 LE1032 LED BICOLOR RED/GREEN 5mm 1
POT1 RS1794 POTENTIOMETER 50KΩ20% LOG 1
SW1 SW1070 SWITCH SLIDE SP3T RIGHT 1
36 SW1075 SWITCH ROCKER 2P2T SNAP 1
XFORMER MI1128 POWER TRANSFORMER (120V) 1
MI1161 POWER TRANSFORMER, (230V) 1

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Powered Subwoofer BASS15/16
BASS 15/16 PACKAGING VIEWS (SCS115 & MUSIC15)

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Powered Subwoofer BASS15/16
BASS 15 PRINTED CIRCUIT BOARDS (TOP VIEW)

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Powered Subwoofer BASS15/16
BASS 15 PRINTED CIRCUIT BOARDS (BOTTOM VIEW)

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Powered Subwoofer BASS15/16
BASS 16 PRINTED CIRCUIT BOARDS (TOP VIEW)

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Powered Subwoofer BASS15/16
BASS 16 PRINTED CIRCUIT BOARDS (BOTTOM VIEW)

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Powered Subwoofer BASS15/16
INTEGRATED CIRCUIT DIAGRAM