JBL PowerBass PB10 Service Manual Download Page 29

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PB10 Block Diagram Revision 2 Only

Rin

Lin

Rout

Lout

DIF. AMP

SUMMI NG AMP

VOLUME CTRL

PHASE CTRL
SWITCH

HPF

18dB/Octave

12dB/Octave

HPF

LPF

12dB/Octave

LPF

Variable

SUMMI NG AMP

LIMITER /
LPF

MUTE

DC OFFSET
PROTECTION

THERMAL
PROTECTION

CURRENT
PROTECTION

LINEAR
POWER SUPPLY

* FUSE

MUTE

SIGNAL SENSE

ATO

SIGNAL SENEING

EXTERNAL LED INDICATORS

CONTROLLED
REGULATOR

CLASS D
AMPLIFIER

+15V SW

MUTE

OUTPUT-RELAY

4 OHMS

LFE

NORMAL

NOTE :
120 VAC T1.25A-250V
230 VAC T0.8A-250V

SPEAKER LEVEL

INPUT

Line Level
Input

RevNo

Revision note

Checked

Date

Signature

Summary of Contents for PowerBass PB10

Page 1: ...PowerBass Series PB10 Powered Subwoofer Service Manual JBL Consumer Products 250 Crossways Park Dr Woodbury New York 11797 Rev7 2 2004 ...

Page 2: ... 6 4 44 Printed Circuit Boards PCB version 7 2 45 Schematics Version 1 Preamp PCB version 6 3 7 0 48 Power Amp PCB version 6 3 49 Power Amp PCB version 7 0 50 Preamp PCB version 7 2 51 Power Amp PCB version 7 2 52 Schematics Version 2 53 PB10 DIFFERENCES IN REVISION 1 AND REVISION 2 REVISION 1 REVISION 2 Amplifier has main power switch Amplifier faceplate says Made in Canada Amplifier serial numbe...

Page 3: ...ted and corrected Critical Components All components identified with the IEC symbol in the parts list and schematic diagram designate components in which safety can be of special significance when replacing identified with Use only the replacement parts designated in the parts list or parts with the same rating of resistance wattage or voltage SAFETY INFORMATION List of Safety Components Requiring...

Page 4: ...Hz High Pass Frequency 150Hz when using Speaker Level Output Dimensions H x W x D 14 x 14 x 15 356mm x 356mm x 381mm with feet 16 x 14 x 15 406mm x 356mm x 381mm Weight 35 lb 15 9kg 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 00232 1 BAS...

Page 5: ...eaker in LP 2nd order variable 60 150 Hz 10 Subsonic filter HPF fixed 6th o Fixed LFE Low pass 2nd order fixed 200 LP 1K Hz Single input driven Speaker out HP filter Left Right 200 Hz 10 Speaker input Spkr out 4 Ohms Left Right 100 Hz 10 Speaker input Spkr out 8 Ohms Limiter YES Signal Sensing ATO Auto Turn On yes no YES functional Auto on selection switch in Auto ATO Input test frequency 50 Hz fu...

Page 6: ...n the Normal position but switch to LFE when playing Dolby Digital DTS or other digital surround modes see page 9 4 Phase Switch Changes the subwoofer s output to be in phase or 180 degrees out of phase with the program material 5 Crossover Frequency Sets the highest frequency the subwoofer will reproduce 6 Line Input Main Input connection to subwoofer preferred 7 Speaker In Jacks Main Input conne...

Page 7: ...le in the post then screw the collar back down until the connection is tight The holes in the center of the collars are intended for banana type connectors Dolby Pro Logic Non Digital Speaker Level Use this installation method for Dolby Pro Logic applications not Dolby Digital DTS or other digital processing where the receiver processor does not have a subwoofer output or a volume controlled pream...

Page 8: ...e that the LFE toggle switch on the subwoofer is in the Normal position Do not use the LFE position with Dolby Pro Logic only processors Note If your receiver or amplifier only has one subwoofer output jack then you may connect the subwoofer output on your receiver preamplifier to either the left or right line level input on the subwoofer It makes no difference which jack you choose Connect each s...

Page 9: ...Connect these jacks to the LFE output or subwoofer output on your receiver or amplifier Note If your receiver or amplifier only has one subwoofer output jack then you may connect the subwoofer output on your receiver preamplifier to either the left or right line level input on the subwoofer It makes no difference which jack you choose Connect each speaker to the corresponding speaker terminals on ...

Page 10: ...ISK OF ELECTRIC SHOCK DO NOT OPEN ON OFF The subwoofer Level Control adjusts the volume of the subwoofer relative to the rest of the system Proper level adjustment depends on several variables such as room size subwoofer placement type of main speakers and listener position Adjust the subwoofer level so that the volume of the bass information is pleasing to you Level Control Crossover Adjustments ...

Page 11: ...ke sure none of the speaker wires are frayed cut or punctured Review proper operation of your receiver amplifier If there is low or no bass output Make sure the connections to the left and right Speaker Inputs have the correct polarity and Make sure that the subwoofer is plugged into an active electrical outlet and switched on Adjust the crossover point Flip the Phase Control switch to the opposit...

Page 12: ...r turn VOLUME control fully counterclockwise disconnect RCA cables 6 Connect one pair of speaker cables to either high level input terminal on UUT Cables should be connected to an integrated amplifier fed by the signal generator 7 Turn on generator and adjust so that speaker level output is 1 0V 50Hz Turn VOLUME control full clockwise 8 Green LED should light immediate bass response should be hear...

Page 13: ...rm the following modification 1 Set the unit on a padded surface and remove all external cables 2 On the amplifier faceplate remove the 10 Phillips mounting screws around the perimeter 3 Remove the amplifier assembly from the enclosure If the amp is turned and supported correctly no other connectors need to be unplugged 4 Locate Zener Diode D10 and Resistor R42 22kΩ See illustration These parts mu...

Page 14: ...wer Transformer PB10 JBL part 80135 PB12 JBL part 80116 C Loud Hum under all circumstances It may be louder when LED s are Green vs Red it may be affected by the position of the Level control The subwoofer may thump or pop approximately every 10 seconds Reset the digital subwoofer amplifier by unplugging the AC power cord Wait 30 seconds then plug the cord back in Repeat this 2 3 times if necessar...

Page 15: ...See serial numbers on Page 3 for factory modified units Hum Buzz or Thumping Replace Power Amp Module S53AMI for symptoms described in C only PB12 Hum Buzz or Thumping Replace Power Amp Module S64AMI for symptoms described in C only Revision 1 of the PB10 12 Amplifier faceplate says Made in Canada Amplifier serial number starts with AM Black or silver potted non serviceable S53 64AMI output module...

Page 16: ...25 26266 26627 26273 26629 26278 26632 26282 26638 26286 26641 26643 26384 26645 26388 26655 26390 26391 26658 26399 26400 26662 26402 26665 26405 26406 26669 26408 26409 26671 26411 26673 26413 26415 26675 26677 26417 26680 26419 26686 26421 26692 26694 26432 26696 26697 26438 26439 26700 26443 26702 26451 26452 26706 26457 26458 26708 26460 26462 26713 26716 26465 26718 26720 26474 26722 26725 2...

Page 17: ...ternational Rectifier or Fairchild Replace both Q18 and Q22 MOSFET s in the circuit even if only one seems to be damaged Do NOT mix match these components from different manufacturers or batches They should be identical Late version PB10 or PB12 subwoofers Revision 2 in the service manual can be identified by Amplifier serial number starts with HA Output transistors in the open on a large black he...

Page 18: ...ual 120V 1 203430 338129 001 Survey Card 1 n a 331384 001 Warranty Card 1 n a 331994 001 5 PB10 Amplifier Complete 1 Not For Sale Not For Sale 6 Foot Screw 4 203411 763 31110 40 7 Foam corners Top Corners 4 203460 n a 8 Foam corners Bottom Corners 4 203470 n a 7 8 Foam End Pad Top Bottom 2 n a 338132 001 9 Port tube 1 Not For Sale 336804 001 10 Logo Badge 1 336485 001 336485 001 LED Ass y for Logo...

Page 19: ...mplifier Exploded View Revision 1 Only 00225 1 2 5 6 3 4 LEGEND 1 Dual RCA jack 108324 2 Power Transformer 80135 3 Level Pot 40402 4 Low Pass Filter Pot 40707 5 Fuse Clips 2 70323 6 1 25A SLO BLO Fuse 3ag 80114 ...

Page 20: ... 6 4 7 8 9 3 MECHANICAL PACKING PARTS LIST Item Description Qty Revision 1 Part Revision 2 Part 1 Level Knob 1 70313 061 020000 000 2 LFE Defeat Switch 1 70150 074 030002 000 3 PB10 faceplate 1 70325 n a 4 HI LEVEL Input Output Jacks 4 108116 072 060170 000 5 Phase Switch 1 70150 074 030002 000 6 Crossover Frequency Knob 1 70313 061 020000 000 7 Strain Relief Plug 1 70305 061 314002 000 8 Power Co...

Page 21: ...position of label on top of the Module incorrectly replacing the Module 180 in the PCB slot will result in its destruction 2 All AC powered test instruments meters oscilloscopes etc must have a floating ground i e be connected to an isolation transformer 3 Align and position the Amp Module before soldering 4 Attach the Amp Module with the mounting screws before soldering or powering up 5 Use only ...

Page 22: ... DRIVER U7 2 Base 3 Collector 1 Emitter 1 2 3 2N5401 Q1 2 Base 3 Collector 1 Emitter 1 2 3 MPSW06RLRA MPSW56RLRAMPQ MPS2222ARLRA 2N2907A 2N5551 Q2 16 3 21 19 23 17 MOSFET IRF640 Q18 22 TIP31C Q4 MMBT3904LTI SOT23 MMBT3906LTI SOT23 DTC114EK SMT3 MMBT5401 LTI MMBT5551 LTI Q11 14 13 5 8 9 6 10 12 15 7 20 24 26 25 BEVEL 1 G 2 D 3 S 1 2 3 B C E ...

Page 23: ... P U1 1 P U1 7 RED 0Vrms 14VDC GREEN 12Vrms 14VDC 3 D C Operation Voltage measurements DVM on Power Amp Module Between 6V V O P V 15V S D FR I P GND 15V And This Point V GND GND GND GND V GND GND GND GND Get this Reading 5 75V 45 7v 0V 45 7V 15 5V 4 75V 0V 0V 0V 15 5V 4 Check Switching Frequency Oscilloscope Use scope EITHER USES AN ISOLATION TRANSFORMER OR ATTACHES THE PROBE TIP TO SPK and REFERE...

Page 24: ...LFE switch off Set Generator at 1 09V 50Hz Signal to High level input Voltage measurements 15 3V at speaker output 3 Low Pass Set up Set Generator at 100 mV 100Hz Signal to Low level input Measure voltage at speaker output Voltage measurement Low Pass Pot Setting Output CW 11 4V CCW 2 19V 4 LFE Set up Set Generator at 100mV 200Hz Signal to Low level input Measure voltage at speaker output LFE swit...

Page 25: ...ltage at the module Check fuse transformer CMC rectifier C1 and C2 Use scope to check switching frequency from the load 100KHz 10 1Vpp Check input of module wrt GND 0V D C Power up with no signal input LED RED OK OK OK OK OK OK OK OK Check C32 and Pre AMP Use scope to check O P at module wrt GND 80Vpp square wave shown Check L1 L2 C10 C11 Check 6V at the module wrt V 5 75V Replace Module MODULE OK...

Page 26: ...nge to GREEN Voltage measurements DVM OP AMP LED P U4 1 P U4 7 RED 0Vrms 8VDC GREEN 6 3Vrms 10 7VDC 3 D C Operation Voltage measurements DVM on CLASS D POWER AMP Between V Q4 E Q1 C Q10 C U7 1 U7 2 U7 4 U7 6 U7 7 U7 8 And This Point GND V GND GND GND GND GND GND GND GND Get this Reading 45 9V 0V 45 9V 0V 45 9V 45 7V 45 5V 0V 0V 4 7V 4 Check Switching Frequency Oscilloscope USE THE PROBE TIP TO U6 ...

Page 27: ...d LFE switch off Set Generator at 1 15V 50Hz Signal to High level input Voltage measurements 15 3V at speaker output 3 Low Pass Set up Set Generator at 100 mV 100Hz Signal to Line level input Measure voltage at S speaker output Voltage measurement X OVER FREQ Setting Output CW 10 72V CCW 2 165V 4 LFE Set up Set Generator at 100mV 200Hz Signal to Line level input Measure voltage at S speaker output...

Page 28: ...heck 15V MOD 15V voltage at U 6 8 U6 4 Discharge C37 Check fuse transformer L4 rectifier C6 and C8 Use scope to check switching frequency U6 7 100KHz 10 22Vp p Check Q4 E TO V 0V D C Power up with no signal input LED RED OK OK OK OK OK OK OK OK Check MUTE 8V and Q24 Q25 Q26 Use scope to check O P U7 6 and GND 90Vp p square wave shown Check L2 L3 C71 C72 C73 C74 I P 10mv 50HZ Check 15V SW Q4 E TO V...

Page 29: ...MUTE DC OFFSET PROTECTION THERMAL PROTECTION CURRENT PROTECTION LINEAR POWER SUPPLY FUSE MUTE SIGNAL SENSE ATO SIGNAL SENEING EXTERNAL LED INDICATORS CONTROLLED REGULATOR CLASS D AMPLIFIER 15V SW MUTE OUTPUT RELAY 4 OHMS LFE NORMAL NOTE 120 VAC T1 25A 250V 230 VAC T0 8A 250V SPEAKER LEVEL INPUT Line Level Input F 1 E D 3 2 C B A 1 2 3 4 7 6 8 F E D 5 RevNo Revision note 6 7 C B Checked 8 Date Sign...

Page 30: ... MPSA56 120V PNP 600mA 60154 Q11 MPSA56 120V PNP 600mA 60156 Q12 2N4401 40V NPN 600mA Capacitors 30706 C1 4700uF 50V 80 20 Electrolytic 105C 30712 C10 10uF 100V 0 2 BP NP Electr DF 1 30502 C11 100nF 50V 0 2 mono ceramic 30706 C2 4700uF 50V 80 20 Electrolytic 105C C20 NOT USED 30502 C21 100nF 50V 0 2 mono ceramic 30502 C22 100nF 50V 0 2 mono ceramic 30526 C24 220nF 50V 0 1 mono ceramic 30529 C25 1n...

Page 31: ...10 R28 732 ohms 0 5W 0 01 metal 40110 R29 732 ohms 0 5W 0 01 metal 40719 R2A 2k2 1W 0 05 metal 40719 R2B 2k2 1W 0 05 metal 40719 R2C 2k2 1W 0 05 metal 40702 R3 6M8 25W 0 05 carbon 40723 R30 2k2 2W 0 05 metal 40417 R31 47k 25W 0 05 carbon 40417 R32 47k 25W 0 05 carbon 40427 R33 23k7 25W 0 01 metal 40724 R34 8k87 25W 0 01 metal 40725 R4 15k 0 5W 0 01 metal 40420 R40 1k 25W 0 05 carbon 40701 R41 1000...

Page 32: ...10 faceplate 80105 Power cord Power cord 70305 Strain relief Strain relief PB10 PREAMP section of PCB Version 6 3 Part Ref Designator Description Semiconductors 60100 U1 LM324 LM324 op amp 60100 U2 LM324 LM324 op amp Capacitors Film Caps may be used in any position EXCEPT C1 C2 30707 C1 200uF 50V 0 2 BP Electrolytic 30526 C10 220nF 50V 0 1 mono ceramic 30514 C11 47nF 50V 0 1 mono ceramic 30504 C12...

Page 33: ...W 0 05 carbon 40713 R20 5k6 25W 0 05 carbon R21 0r Jumper 40713 R22 5k6 25W 0 05 carbon R23 0r Jumper 40109 R24 604 ohms 25W 0 01 metal 40412 R25 33k2 25W 0 01 metal 40405 R26 4k7 25W 0 01 metal 40109 R27 604 ohms 25W 0 01 metal 40412 R28 33k2 25W 0 01 metal 40406 R3 100k 25W 0 05 carbon 40714 R30 14k 25W 0 01 metal 40715 R33 9k09 25W 0 01 metal 40716 R34 60k4 25W 0 01 metal 40451 R35 137k 25W 0 0...

Page 34: ...0718 R14 3k3 25W 5 carbon 40406 R15 100k 25W 5 carbon 40405 R21 4K7 25W 5 carbon 40720 R22 42K2 25W 1 metal 40721 R23 237k 25W 1 metal R24 NOT USED R25 NOT USED 40722 R26 6k8 25W 5 carbon 40723 R27 2k2 2W 5 metal SAFETY 40110 R28 732 ohms 0 5W 1 metal 40110 R29 732 ohms 0 5W 1 metal 40723 R30 2k2 2W 5 metal SAFETY 40417 R31 47k 25W 5 carbon 40417 R32 47k 25W 5 carbon 40427 R33 23k7 25W 1 metal 407...

Page 35: ...ctors 50105 D1 1N4744A 15V 1w Zener 50105 D2 1N4744A 15V 1w Zener 50101 D3 1N5256B 30V 5w Zener 50104 D4 1N4148 5 Sig Diode 50113 D5 1N4735A 6 2V 1W 50107 D6 1N5234B 6 2V 5w Zener 50104 D7 1N4148 5 Sig Diode 50104 D8 1N4148 5 Sig Diode 50112 D10 1N5242B 12V 5 5w Zener 50104 D11 1N4148 Sig Diode 50112 D12 1N5242B 12V 5w Zener 50104 D13 1N4148 Sig Diode 50104 D14 1N4148 Sig Diode 60157 Q1 2N5457 25V...

Page 36: ...on 40406 R6 100k 25W 5 carbon 40717 R8 2k7 25W 5 carbon 40717 R9 2k7 25W 5 carbon 40409 R10 10k 25W 5 carbon 40708 R11 57k6 25W 1 carbon 40454 R12 45k3 25W 1 metal 40412 R13 33k2 25W 1 metal 40709 R14 68k1 25W 1 metal 40710 R15 11k3 25W 1 metal 40711 R16 1k3 25W 1 metal 40712 R17 243k 25W 1 metal 40441 R18 13k7 25W 1 metal 40441 R19 13k7 25W 1 metal 40713 R20 5k6 25W 5 carbon R21 0r Jumper 40713 R...

Page 37: ... 20 mono ceramic 30100 C19 330pF 50V 20 mono ceramic 30519 C20 100nF 50V 20 mono ceramic 30519 C21 100nF 50V 20 mono ceramic 30519 C22 100nF 50V 20 mono ceramic 30519 C23 100nF 50V 20 mono ceramic C30 NOT USED Semiconductors 50104 D50 1N4148 5 Sig Diode 50104 D51 1N4148 5 Sig Diode 50104 D52 1N4148 5 Sig Diode 50104 D53 1N4148 5 Sig Diode 50104 D54 1N4148 5 Sig Diode 50104 D55 1N4148 5 Sig Diode 6...

Page 38: ...98 120 SMD Resistor 220 ohms 1 8W J 1 R90 024 220498 121 SMD Resistor 2K2 1 8W J 3 R1 87 61 024 220598 120 SMD Resistor 22K 1 8W J 3 R50 52 118 024 220798 120 SMD Resistor 2M2 1 8W J 2 R80 121 024 237598 120 SMD Resistor 23K7 1 8W F 1 R48 024 237698 100 SMD Resistor 237K 1 8W F 1 R45 024 243698 100 SMD Resistor 243K 1 8W F 1 R36 024 270498 120 SMD Resistor 2K7 1 8W J 2 R64 73 024 300398 120 SMD Re...

Page 39: ... 100525 300 Electrolytic Capacitor 10uF 25V M 1 C35 034 100625 300 Electrolytic Capacitor 100uF 25V M 1 C64 034 220525 301 Electrolytic Capacitor 22uF 25V M 6 C39 50 53 41 4 9 034 220615 301 Electrolytic Capacitor 220uF 16V M 1 C37 034 330525 300 Electrolytic Capacitor 33uF 25V M 1 C1 034 330615 300 Electrolytic Capacitor 330uF 16V M 2 C12 78 034 470415 301 Electrolytic Capacitor 4u7 50V M 1 C2 03...

Page 40: ...041 115001 000 Bead Coil YT 10911 1 L5 043 300101 000 Inductor 30uH YT 10033 1 L2 043 324300 000 Inductor 324uH YT 10778 1 L4 043 560200 000 Inductor 56uH YT 10779 1 L1 043 700101 000 Toroidal Inductor 70uH YT 10682 1 L3 072 010007 000 RCA Housing SCJ 1020 2P G WHT RED 1 CONN1 072 040039 000 Terminal PC205 t 0 8m m T205MA 1 S 072 040064 000 Terminal PC250 t 0 8 T250MA 1 S 072 040096 000 Terminal t...

Page 41: ...41 PB10 PCB version 6 3 7 0 Revision 1 Only ...

Page 42: ...42 PB10 PCB version 6 3 7 0 Revision 1 Only ...

Page 43: ...43 PB10 PCB version 6 3 7 0 Cont Revision 1 Only ...

Page 44: ...PB10 PCB version 6 4 Power Amp Only Revision 1 Only ...

Page 45: ...PB10 PCB version 7 2 Revision 1 Only ...

Page 46: ...PB10 PCB version 7 2 Revision 1 Only ...

Page 47: ...PB10 PCB version 7 2 Revision 1 Only ...

Page 48: ...OL 1 20k POT LO PASS CONTROL 2 20k POT U2 C10 220nF C12 100n C13 47n C11 47nF R21 0r Jumper R19 13k7 R22 5k6 R23 0r Jumper LoPass Defeat Sw SW SPDT LO PASS CONTROL 3 NOT USED LO PASS CONTROL 4 NOT USED 13 12 14 13 14 12 3 2 1 7 6 5 6 5 7 8 10 9 1 3 2 1 2 3 1 2 3 4 5 6 7 8 9 11 12 10 R1 4k7 R2 4k7 15V 15V C21 100nF C20 100nF C23 100nF C22 100nF 15V GND GND SIG 15V mute To From PWRAMP R25 33k2 B10 P...

Page 49: ...er R10B 0 1R R10C 0 1R R10A 0 1R Q10 MPSA56 R11 1k Q11 MPSA56 R13 47k R14 3k3 R12 1k Q12 2N4401 CZ NOT USED CW NOT USED SP Neg SP Pos V V TRX MCI4932 CMC 2m2H C7A 100nF C7B 100nF R2B 2k2 C1 4700uF C2 4700uF 3AG FUSE 1 25A SloBlo AC Feed AC Return 9 8 10 R8A 4k7 R8B 4k7 R1B 2k2 R1C 2k2 R2C 2k2 R2A 2k2 12 13 14 R27 2k2 4 11 R7A 5k6 15V GND GND SIG 15V mute 2 3 1 5 6 7 R21 4K7 R42 10k D7 1N4148 D8 1N...

Page 50: ...USED V V TRX M CI5024 CM C 2m 2H C7A 100 nF C7B 100 nF R2B 2k2 C1 4700 uF C2 4700 uF 3AG FUSE 1 25A Sl oBl o 9 8 10 R8A 4k7 R8B 4k7 R1B 2k2 R1C 2k2 R2C 2k2 R2A 2k2 12 13 14 R27 2k2 4 11 R7A 5k6 15V GND GND SI G 15V m ut e 2 3 1 5 6 7 R21 4K7 R42 10k D7 1N4148 D8 1N4148 D10 1N5242B R50 2k2 R100 NOTUSED 4 11 4 11 ToU1 P i n 4 To U1 P i n 11 SHORTCI RCUI T P ROTECT SI GNALLED AUTO M UTE To Fro m P RE...

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Page 53: ...53 PB10 Revision 2 Schematic Diagrams PREAMP ...

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