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Table of Contents
- 1 Table of Contents
- 2 Specifications
- 3 Features
- 4 Powered Sub Test Setup
- 5 Test Procedure
- 6 Important Service Note
- 7 Block Diagram
- 8 Amplifier Exploded View
- 9 Cabinet Assembly Exploded View
- 10 Parts Lists
- 11 Packaging View
- 12 Printed Circuit Boards
- 13 Integrated Circuit Diagram
- 14 Schematic Diagrams
- Download this manual
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Table of Contents
Related Manuals for JBL BASS20
Summary of Contents for JBL BASS20
- Page 1 BASS20 Powered Subwoofer SERVICE MANUAL SERVICE MANUAL 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-JBLBASS20...
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Page 2: Table Of Contents
Width . Depth . Weight. 42lbs (19.1kg) FEATURES The Bass20 powered subwoofer is part of the SCS120 or Line level or Speaker level inputs, outputs for full range MUSIC 20 System. satellite speakers. 150 watt output. User friendly auto on circuit. Signal sensing automatically turns the subwoofer on so you don’t have... -
Page 3: Powered Sub Test Setup
BASS 20 POWERED SUB WOOFER TEST SETUP 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. -
Page 4: Test Procedure
SERVICE NOTE (120v Version only) Even though the Bass20 seems 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. -
Page 5: Important Service Note
Create solderable surface on PCB, (just above R49) by scaping the green mask from the board with Exacto knife or similar tool. Attach R41, 470W 1W resistor (JBL #RS2180) to new surface and C1 (-) pad. Resistor should "stand off" from PCB; secure with RTV or epoxy if desired. -
Page 6: Block Diagram
Powered Subwoofer BASS20 BASS 20 (120v US & 230v European Versions) BLOCK DIAGRAM... -
Page 7: Amplifier Exploded View
Powered Subwoofer BASS20 BASS20 (120V & 230V versions) AMPLIFIER EXPLODED VIEW... -
Page 8: Cabinet Assembly Exploded View
Powered Subwoofer BASS20 BASS20 CABINET ASSEMBLY EXPLODED VIEW... -
Page 9: Parts Lists
LABLE FOR HEATSINK (230V) CP1552 SMD CAP 0.1uF 20% 100V Z5U P MS1004 SILICONE GREASE #340 DOW C5P, 6, 17 CP1579 33µF 16V NPE PM1366 GASKET FOR BASS20 CP1808 0.1µF 250V TE1125 TERMINAL ULTRA FAST INS. CX1, CX2, CP1844 0.01µF 200V SMD WI1637 WIRE #18 BLUE/WHITE TRACER 3"... - Page 10 Powered Subwoofer BASS20 REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION R26, 28 RS1717 SMD RES 100Ω 5% 1/8W 12 P Miscellaneous RS1716 SMD RES 33.2K 1% 1/8W 120 P SA0000042 AIR CORE INDUCTOR 1.8uH MI RS1711 SMD RES 220Ω 5% 1/8W 12 P...
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Page 11: Packaging View
Powered Subwoofer BASS20 BASS20 PACKAGING VIEW (MUSIC20 & SCS120) -
Page 12: Printed Circuit Boards
Powered Subwoofer BASS20 PRINTED CIRCUIT BOARDS (TOP VIEW) - Page 13 Powered Subwoofer BASS20 PRINTED CIRCUIT BOARDS (BOTTOM VIEW)
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Page 14: Integrated Circuit Diagram
Powered Subwoofer BASS20 INTEGRATED CIRCUIT DIAGRAM... -
Page 15: Schematic Diagrams
Powered Subwoofer BASS20 120V SCHEMATIC DIAGRAM... - Page 16 Powered Subwoofer BASS20 120V SCHEMATIC DIAGRAM...
- Page 17 Powered Subwoofer BASS20 230V SCHEMATIC DIAGRAM...
- Page 18 Powered Subwoofer BASS20 230V SCHEMATIC DIAGRAM...