JBL PB12 Service Manual
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JBL PB12 Service Manual

Powerbass series
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Table of Contents

See also: Service Manual , Owner's Manual
PowerBass
Series
PB12
Subwoofer
PRELIMINARY
SERVICE MANUAL
JBL Incorporated, Inc.
250 Crossways Park Dr.
Woodbury, New York 11797

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Summary of Contents for JBL PB12

  • Page 1  PowerBass Series PB12 Subwoofer PRELIMINARY SERVICE MANUAL JBL Incorporated, Inc. 250 Crossways Park Dr. Woodbury, New York 11797...

  • Page 2: Table Of Contents

    - CONTENTS - BASIC SPECIFICATIONS ……….……………….…….……………..……………..2 DETAILED PB12 SPECIFICATIONS…………………….……….……..……………..3 CONNECTIONS…………………………………………………..……………..………..4 OPERATION………………………………….……………………………………..…….8 TROUBLESHOOTING…………………….…………….………………..….……..…….9 ELECTRICAL PARTS LIST ……………….…………..…………..……………….…10 MECHANICAL/PACKING PARTS LIST……………….……..……….…………….…15 PCB DRAWINGS……………….…………..……………….………..….………………16 SCHEMATICS ………..……………………..………………...…….………………..19...

  • Page 3: Basic Specifications

    (with feet) 17 1/2" x 15" x 16" 445mm x 381mm x 406mm Weight 40 lb/18.2kg Refinements may be made on occasion to existing products without notice but will always meet or exceed original specifications unless otherwise stated. PowerBass is a registered trademark of JBL Incorporated.

  • Page 4: Detailed Pb12 Specifications

    JBL PB 12 250W Powered Sub Amp LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes US 120vac/60Hz 108-132 Vrms Normal Operation EU 230vac/50-60Hz 207-264 Vrms Normal operation, MOMS required QA Test Parameter Specification Unit Limits Conditions Notes Amp Section Type (Class AB, D, other)

  • Page 5: Connections

    S P E A K E R C O N N E C T I O N When we designed the examples to determine which post is visible under the collar. PB10 and PB12 powered description best matches your Insert the bare end of the wire subwoofers, our goal was...

  • Page 6: Speaker Connection/Level

    S P E A K E R C O N N E C T I O N When we designed the examples to determine which post is visible under the collar. PB10 and PB12 powered description best matches your Insert the bare end of the wire subwoofers, our goal was...

  • Page 7: Dolby Pro Logic Line Level

    Dolby Pro Logic (Non-Digital) – Line Level Use this installation method use the “LFE” position with Make sure your receiver or for Dolby Pro Logic appli- Dolby Pro Logic-only processor is configured cor- cations (not Dolby Digital, DTS processors. rectly: Make sure that the sub- or other digital processing), woofer is configured as “On.”...

  • Page 8: Dolby Digital Or Dts Connection

    Dolby Digital or DTS (or Other Digital Surround Mode) Connection Use this installation method then you may connect the center and rear speakers for Dolby Digital, DTS or other subwoofer output on your should be set to “Small” or digital surround processors: receiver/preamplifier to either “Large”...

  • Page 9: Operation

    Power When the unit is plugged in from green to red after the turned off, whenever desired. and (for the PB12 only) the input signal to the subwoofer The PB10 must be unplugged power switch is on and no is removed. Due to JBL’s...

  • Page 10: Troubleshooting

    (PB12 only) switched on. • Check all wires and con- • Check all wires and • Adjust the crossover point. nections between receiver/ connections between •...

  • Page 11: Electrical Parts List

    Electrical Parts List - PB12 PB12 POWERAMP PCB Version 6.3. Part# Designator Description 50100 BR RECT RS604 6AMP Bridge rectifier 50105 1N4744A 1w Zener 50112 1N5242B .5w Zener 50104 1N4148 Sig Diode 50112 1N5242B .5w Zener 50104 1N4148 Sig Diode...
  • Page 12 Part# Designator Description Resistors R100 NOT USED 40105 R10A 0.1R metal 40105 R10B 0.1R metal 40105 R10C 0.1R metal 40420 .25W carbon 40420 .25W carbon 40417 .25W carbon 40718 .25W carbon NOT USED 40735 metal 40735 metal 40735 metal 40405 .25W carbon 40736...
  • Page 13 0.187" PCB Tabs 70323 PCB Fuse Holders 70325 PB12 faceplate PB12 faceplate 80105 Power cord Power cord 70305 Strain relief Strain relief PB12 PREAMP PCB Version #6.3 Part# Designator Description Semiconductors 60102 TLO 64 OP amp 60100 LM324 OP amp Capacitors...
  • Page 14 Part# Designator Description 30502 100nF mono ceramic 30502 100nF mono ceramic 30502 100nF mono ceramic 30101 220pF mono ceramic NOT USED 30101 220pF mono ceramic 30101 220pF mono ceramic 30101 220p mono ceramic 40730 .25W Metal Resistor Resistors 40405 .25W carbon 40409 .25W...
  • Page 15 Miscellaneous 108320 RCA CONNECTOR DUAL RCA-yellow 108116 HI LEVEL I/O Binding Post Binding Post 108116 HI LEVEL I/O Binding Post Binding Post 40402 LEVEL 5k POT Log (A) Pot 40707 Crossover CONTROL 20k POT Lin (B) Pot. 70150 LFE switch SW SPDT mini-Toggle 70150...

  • Page 16: Mechanical/Packing Parts List

    PB12 MECHANICAL & PACKING PARTS LIST Part# Description 203500 12” Woofer 203410 Foot 203520 Outer Carton 203430 Owner’s manual 120V 203550 Amplifier complete...

  • Page 17: Pcb Drawings

    Vers63.gbl (Board layer 1) Scale=1.20 Wed May 17 08:26:14 2000...
  • Page 18 Vers63.gtl (Board layer 1) Scale=1.20 Wed May 17 08:36:44 2000...
  • Page 19 Vers63.gto (Board layer 1) Scale=1.36 Wed May 17 08:38:34 2000...

  • Page 20: Schematics

    From PwrAmp To Pin 14 U1/U2 NOT USED 100nF From PwrAmp NOT USED NOT USED NOT USED Title B12 PREAMP (6.3 pcb) Size Number Revision Tabloid Date: 20-Apr-2000 Sheet of File: T:\PB12 sch Folder\..\PB12 preamp Rev5.sch D rawn By: MS/LL...
  • Page 21 On Faceplate 100nF AC Feed SW SPST BR RECT 2A SloBlo 2m2H AC Return 100nF RS604 Title B12 PwrAmp (6.0 PCB) 2200uF Size Number Revision 2200uF Date: 20-Apr-2000 Sheet of File: T:\PB12 sch Folder\..\PB12 PwrAmp Rev5.sch Drawn By: MA / LL...

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