JBL PowerBass PB12 Service Manual
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JBL PowerBass PB12 Service Manual

Powerbass series
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See also: Service Manual , Owner's Manual
PowerBass
TM
Series
PB12
Subwoofer
SERVICE MANUAL
JBL Incorporated
250 Crossways Park Dr.
REV2 10/2001
Woodbury, New York 11797

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Summary of Contents for JBL PowerBass PB12

  • Page 1 PowerBass Series PB12 Subwoofer SERVICE MANUAL JBL Incorporated 250 Crossways Park Dr. REV2 10/2001 Woodbury, New York 11797...

  • Page 2: Table Of Contents

    Controls and their Function …………….……………………………….6 Speaker Connection …………………….……………………………….7 Operation ………………………………….….………………………….10 Troubleshooting………………………………………………………….11 Test Setup and Procedure ……………………………….…………….12 Service Bulletin JBL 2001-03 ………………………………………….13 Service Bulletin JBL 2001-05 ………………………………………….14 Service Bulletin JBL 2001-07 ………………………………………….15 Exploded and Packaging ………………………………...…………….16 Amplifier Exploded View ……………………………………………….17 Amplifier Faceplate …………………………………..…………………18 Integrated Circuit Diagrams…………………………………………….19...

  • Page 3: Safety Information

    PB12 SAFETY INFORMATION 100V 4.7uF...

  • Page 4: Basic Specifications

    PB12 BASIC SPECIFICATIONS PB12 Subwoofer...

  • Page 5: Detailed Specifications

    PB12 DETAILED SPECIFICATIONS PB12 Subwoofer...

  • Page 6: Controls And Their Function

    Front Panel Power - These lights will be red when the unit is plugged in and not receiving a signal; when the PB12 receives a signal, the lights will cycle to GREEN. If no signal is received after 10-15 minutes the lights will cycle back to RED (standby) until a signal is present again.

  • Page 7: Speaker Connection

    PB12 Speaker Connection examples to determine which the hole through the When we designed the PB10 and PB12 powered description best matches your centerpost is visible under the system and follow the collar. subwoofers, our goal was to offer the user the best possible...

  • Page 8: Dolby Pro Logic Line Level

    PB12 Dolby Pro Logic (Non-Digital)-Line Level Use this installation method for position with Dolby Pro Logic- Make sure your receiver or Dolby Pro Logic applications only processors. processor is configured (not Dolby Digital, DTS or correctly; Make sure that the...

  • Page 9: Dolby Digital Or Dts Connection

    PB12 Dolby Digital or DTS (or Other Digital Surround Mode) Connection Use this installation method for you may connect the The front left, front right, center Dolby Digital, DTS or other subwoofer output on your and rear speakers should be...

  • Page 10: Operation

    LEDs on the front of the unit input signal to the subwoofer is will turn red. When a signal is removed. Due to JBL’s present, the LEDs will turn unique, high-output, high- green. efficiency amplifier design,...

  • Page 11: Troubleshooting

    (PB12 switched on. and is switched on. only) switched on. •Check all wires and •Adjust the crossover point.

  • Page 12: Test Setup And Procedure

    PB12 PB12 TEST SET UP AND PROCEDURE AC VOLT METER (6V) LEVEL FROM LINE LEVEL LINE-LEVEL CD PLAYER NORMAL SOURCE PHASE CROSSOVER FREQUENCY 50 Hz 150 Hz PRE AMP PB10 or PB12 LINE LEVEL IN UNDER TEST USE L or R...

  • Page 13: Service Bulletin Jbl 2001-03

    Subject: Unit Will Not Switch To Standby Mode When the power cord of the PB series subwoofer is plugged into a wall outlet, (and for the PB12 only, the power switch is on), and an audio signal is present, the LED’s on the cabinet face will turn green, indicating the subwoofer is in the ON mode.

  • Page 14: Service Bulletin Jbl 2001-05

    All JBL Service Centers Models: PB12 Subject: Popping Every Few Seconds During Play In the event you receive a PB12 subwoofer with the complaint: “The subwoofer “thumps” or “pops” every few seconds of play”, follow the procedure below: Probable Cause: Inductor L1 (220uH) may be damaged.

  • Page 15: Service Bulletin Jbl 2001-07

    Subject: Possible Missing Diode D4 In the event you receive a PB12 subwoofer for any servicing reason, check for the presence of diode D4 on the Main PCB close to the Power Amp Module (see illustration). If D4 is missing or has been “cut out”...

  • Page 16: Exploded And Packaging

    PB12 Exploded and Packaging Views MECHANICAL & PACKING PARTS LIST 12” Woofer 203500 Foot 203410 Outer Carton 203520 Owner’s Manual 120V 203430 Amplifier Complete Not For Sale Foot Screw 203411 Foam corners (package drawing): Top Corner 4/carton 203460 Bottom Corner 4/carton...

  • Page 17: Amplifier Exploded View

    PB12 Amplifier Exploded View LEGEND Dual RCA jack 108320 Power Transformer 80116 Level Pot 40402 Crossover CONTROL 40707 Fuse Clips (2) 70323 2A SloBlo T Type Fuse (3AG) 80117 Power Switch 70151...

  • Page 18: Amplifier Faceplate

    PB12 Amplifier Faceplate Parts LEVEL KNOB 70313 PHASE SWITCH 70150 LFE DEFEAT LEVEL SWITCH 70150 NORMAL CROSSOVER PB12 FREQUENCY KNOB PHASE FACEPLATE 70313 70325 CROSSOVER FREQUENCY 50 Hz 150 Hz HI LEVEL I/O 108116 LINE LEVEL IN USE L or R...

  • Page 19: Integrated Circuit Diagrams

    PB12 Integrated Circuit Diagrams S53AMI/S64AMI - Power Amp module SAFETY PART NOTE: THE FOLLOWING PROCEDURES MUST BE FOLLOWED WHEN INSTALLING NEW S53AMI/S64AMI AMP MODULES: +6V 15 FAILURE TO FOLLOW ONE OR MORE OF THESE STEPS MAY RESULT IN THE INSTANT DESTRUCTION OF THE MODULE WHEN POWERED UP.

  • Page 20: Testing Procedure

    PB12 Testing Procedure...
  • Page 21 PB12 Integrated Circuit Diagrams (Cont.)
  • Page 22 PB12 Integrated Circuit Diagrams (Cont.)

  • Page 23: Electrical Parts List (Pcb Version 6.3 - 7.0)

    PB12 PB12 Electrical Parts List PB12 POWER AMP PCB Version 6.3 - 7.0. Part # Designator Description...
  • Page 24 PB12 PB12 Electrical Parts List (Cont.) PB12 POWER AMP section of PCB Version 6.3 - 7.0 Part # Designator Description...
  • Page 25 PB12 PB12 Electrical Parts List (Cont.) PB12 POWER AMP section of PCB Version 6.3 - 7.0 Part # Designator Description...
  • Page 26 PB12 PB12 Electrical Parts List (Cont.) PB12 PREAMP section of PCB Version 6.3 - 7.0 Part # Designator Description...
  • Page 27 PB12 PB12 Electrical Parts List (Cont.) PB12 PREAMP section of PCB Version 6.3 - 7.0 Part # Designator Description...

  • Page 28: Electrical Parts List (Pcb Version 7.2)

    PB12 Electrical Parts List Version 7.2 Ref. Designator Description Part# POWERAMP section of PCB Version 7.2 Resistors 40735 metal SAFETY metal SAFETY 40735 40735 metal SAFETY 40735 metal SAFETY metal SAFETY 40735 40735 metal SAFETY .25W carbon 40703 40740 metal...
  • Page 29 Part# Ref. Designator Description 40726 .25W carbon .25W carbon 40727 Capacitors 30710 2200uF 100V +80/-20 Electrolytic 105C SAFETY 2200uF 100V +80/-20 Electrolytic 105C SAFETY 30710 30502 100nF mono ceramic 30502 100nF mono ceramic 100nF 250V ceramic/film SAFETY 30521 30521 100nF 250V ceramic/film SAFETY...
  • Page 30 70323 3AG FUSE 2A fuse SloBlo, 3AG SAFETY 80117 0.187" Tabs 0.187" PCB fastons 70324 0.250" Tabs 0.250" PCB fastons 70328 PB12 faceplate PB12 faceplate 70325 80105 Power cord Power cord SAFETY 70305 Strain relief Strain relief SAFETY 70151 Switch...
  • Page 31 Ref. Designator Description Part# 30707 200uF BP Electrolytic 30707 200uF BP Electrolytic 30101 220pF mono ceramic 220pF mono ceramic 30101 220pF mono ceramic 30101 220p mono ceramic 30101 .25W Metal Resistor 40730 100nF mono ceramic 30504 30504 100nF mono ceramic 30504 100nF mono ceramic...

  • Page 32: Printed Circuit Boards (Pcb Version 6.3 - 7.0)

    PB12 PB12 PCB’s version 6.3...
  • Page 33 PB12 PCB’s version 6.3 (Cont.)
  • Page 34 PB12 PCB’s version 6.3 (Cont.)

  • Page 35: Printed Circuit Boards (Pcb Version 6.4)

    PCB version 6.4 (Power Amp only)

  • Page 36: Printed Circuit Boards (Pcb Version 7.2)

    (PCB version 7.2)
  • Page 37 (PCB version 7.2)
  • Page 38 (PCB version 7.2)

  • Page 39: Preamp (Pcb Version 6.3 - 7.0)

    SCHEMATIC DIAGRAMS Pre Amp (PCB version 6.3)

  • Page 40: Power Amp (Pcb Version 6.0-6.3)

    Power Amp (PCB version 6.0-6.3)

  • Page 41: Power Amp (Pcb Version 7.0)

    Power Amp (PCB version 7.0) LED1/2 Preamp LED1/2 Preamp 1000k SIGNAL LED & AUTO MUTE Not Connected V+ LED LED Harness 470K 1N4148 TLO64 R100 NOT USED Un-designated Connector TLO64 On Harness On Harness MOLEX 2 MOLEX 2 1N4148 To U1 Pin 11 1N4148 +15V mute...

  • Page 42: Preamp ( Pcb Version 7.2)

    Pre Amp (PCB version 7.2) 3rd Order Hi-Pass DUAL RCA 5k POT 68k1 604r NOT USED SW SPDT REMOTE R In 33k2 LEVEL 330pF 220p 45k3 330pF TLO64 Phase Switch NOT USED 33k2 L In 33k2 137k NOT USED 56k2 RCA CONNECTOR 604r 1N4148...

  • Page 43: Power Amp (Pcb Version 7.2)

    Power Amp (PCB version 7.2) LED1/2 Preamp LED1/2 Preamp 1000k SIGNAL LED & AUTO MUTE Not Used 470K LED 3 LED Harness 1N4148 TLO64 Molex 2 TLO64 Not Used Molex 2 On Harness On Harness CONN 2 Header Socket 1N4148 To U1 Pin 11 1N4148 +15V...

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