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JBL PowerBass PB12 Service Manual

Other manuals for PowerBass PB12: Owner's Manual, Service Manual, Service Manual
Manual is about: PowerBass Series Powered Subwoofer

Summary of PowerBass PB12

  • Page 1

    Jbl incorporated 250 crossways park dr. Woodbury, new york 11797 rev2 10/2001 powerbass tm series pb12 subwoofer service manual.

  • Page 2: Pb12

    Pb12 table of contents safety information ……………………………………………………….3 basic specifications ………………………………….………………….4 detailed specifications ………………………………………………….5 controls and their function …………….……………………………….6 speaker connection …………………….……………………………….7 operation ………………………………….….………………………….10 troubleshoo...

  • Page 3

    Pb12 3 safety information.

  • Page 4

    Pb12 4 basic specifications pb12 subwoofer.

  • Page 5

    Pb12 5 detailed specifications pb12 subwoofer.

  • Page 6

    Pb12 6 pb12 subwoofer controls and their function 1. 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) unti...

  • Page 7

    Pb12 7 speaker connection when we designed the pb10 and pb12 powered subwoofers, our goal was to offer the user the best possible performance combined with the most flexible and complete installation options. Please look over the following three examples to determine which description best matches y...

  • Page 8

    Pb12 8 dolby pro logic (non-digital)-line level use this installation method for dolby pro logic applications (not dolby digital, dts or other digital processing), where the receiver/processor is equipped with a subwoofer output or a volume-controlled preamp (line-) level output: use rca-type patch ...

  • Page 9

    Pb12 9 dolby digital or dts (or other digital surround mode) connection use this installation method for dolby digital, dts or other digital surround processors: important: make sure that the lfe toggle switch on the subwoofer is in the “lfe” position. Use the line-level input jacks for the low- fre...

  • Page 10

    Pb12 10 operation power when the unit is plugged in and the power switch is on and no signal is received, the leds on the front of the unit will turn red. When a signal is present, the leds will turn green. Note: it will take several minutes for the leds to turn from green to red after the input sig...

  • Page 11

    Pb12 11 phase control the phase control determines whether the subwoofer’s piston-like action moves in and out in phase with the main speakers or opposite the main speakers. There is no correct or incorrect setting. Proper phase adjustment depends on several variables such as subwoofer placement and...

  • Page 12

    Pb12 12 pb12 test set up and procedure min max level 50 hz 150 hz lfe normal phase 180 0 crossover frequency line level in l r for lfe use l or r l high livel in r l high livel out r 00 22 9 cd player pre amp amplifier ac volt meter (6v) line level pb10 or pb12 under test speaker level from line-lev...

  • Page 13: Service Bulletin

    Jbl incorporated 250 crossways park dr. Woodbury, new york 11797 (516) 496-3400 service bulletin service bulletin jbl2001-03 - march 2001 this is considered a minor repair to: all jbl service centers models: pb10, pb12 subject: unit will not switch to standby mode when the power cord of the pb serie...

  • Page 14: Service Bulletin

    Jbl incorporated 250 crossways park dr. Woodbury, new york 11797 service bulletin service bulletin jbl2001-05 - june 2001 this is considered a minor repair to: all jbl service centers models: pb12 subject: popping every few seconds during play in the event you receive a pb12 subwoofer with the compl...

  • Page 15: Service Bulletin

    Jbl incorporated 250 crossways park dr. Woodbury, new york 11797 service bulletin service bulletin jbl2001-07 - november 2001 this is considered a minor repair to: all jbl service centers model: pb12 subject: possible missing diode d4 in the event you receive a pb12 subwoofer for any servicing reaso...

  • Page 16

    Pb12 16 exploded and packaging views 1 2 3 (image reduced) 4 5 00223 6 7 8 mechanical & packing parts list 1 12” woofer 203500 2 foot 203410 3 outer carton 203520 4 owner’s manual 120v 203430 5 amplifier complete not for sale 6 foot screw 203411 foam corners (package drawing): 7 top corner 4/carton ...

  • Page 17

    Pb12 17 amplifier exploded view 00263 1 2 5 6 3 4 7 legend 1 dual rca jack 108320 2 power transformer 80116 3 level pot 40402 4 crossover control 40707 5 fuse clips (2) 70323 6 2a sloblo t type fuse (3ag) 80117 7 power switch 70151.

  • Page 18

    Pb12 18 amplifier faceplate parts min max level 50 hz 150 hz lfe normal phase 180 0 crossover frequency line level in l r for lfe use l or r l high livel in r l high livel out r 00264 120v 60 hz, 180w jbl inc. Northridge, ca, usa made in canada caution risk of electric shock do not open r lr 110113 ...

  • Page 19

    Pb12 19 integrated circuit diagrams u1,u2 (lm324, tlo64)) 2 base 3 collector 1 emitter 1 2 3 q10,q11 (mpsa56) 2 base 3 collector 1 emitter 1 2 3 q12 (2n4401) 0 0 2 2 7 d s g n-chan jfet q1 2n5457 +6v 15 16 17 v+ 1 +6v 2 v+ 3 18 4 o/p 19 5 o/p 20 6 v- v- 21 7 22 8 sd 24 +15v 23 9 +15v 10 sd fr 25 11 ...

  • Page 20

    Pb12 20 testing procedure.

  • Page 21

    Pb12 21 integrated circuit diagrams (cont.).

  • Page 22

    Pb12 22 integrated circuit diagrams (cont.).

  • Page 23

    Pb12 23 pb12 electrical parts list pb12 power amp pcb version 6.3 - 7.0. Part # designator description.

  • Page 24

    Pb12 24 pb12 electrical parts list (cont.) pb12 power amp section of pcb version 6.3 - 7.0 part # designator description.

  • Page 25

    Pb12 25 pb12 electrical parts list (cont.) pb12 power amp section of pcb version 6.3 - 7.0 part # designator description.

  • Page 26

    Pb12 26 pb12 electrical parts list (cont.) pb12 preamp section of pcb version 6.3 - 7.0 part # designator description.

  • Page 27

    Pb12 27 pb12 electrical parts list (cont.) pb12 preamp section of pcb version 6.3 - 7.0 part # designator description.

  • Page 28

    Pb12 electrical parts list version 7.2 part# ref. Designator description poweramp section of pcb version 7.2 resistors 40735 r1a 7k5 2w 5% metal safety 40735 r1b 7k5 2w 5% metal safety 40735 r1c 7k5 2w 5% metal safety 40735 r2a 7k5 2w 5% metal safety 40735 r2b 7k5 2w 5% metal safety 40735 r2c 7k5 2w...

  • Page 29

    Part# ref. Designator description 40726 r49 15k .25w 5% carbon 40727 r50 2k2 .25w 5% carbon capacitors 30710 c1 2200uf 100v +80/-20 electrolytic 105c safety 30710 c2 2200uf 100v +80/-20 electrolytic 105c safety 30502 c3 100nf 50v 20% mono ceramic 30502 c6 100nf 50v 20% mono ceramic 30521 c7a 100nf 2...

  • Page 30

    Part# ref. Designator description 80122 l3 8u5h 5 amp 5% ferrite bead 80122 l4 8u5h 5 amp 5% ferrite bead 80138 cmc 3m6h 5 amp choke safety 70322 led 3 molex 2 header male connector 108326 led harness molex 2 socket glued into cabinet with 2 bi-color led 70323 3ag type 3ag pc clip 2 pcb-mount fuse c...

  • Page 31

    Part# ref. Designator description 30707 c1 200uf 50v 20% bp electrolytic 30707 c2 200uf 50v 20% bp electrolytic 30101 c3 220pf 50v 20% mono ceramic 30101 c4 220pf 50v 20% mono ceramic 30101 c5 220pf 50v 20% mono ceramic 30101 c6 220p 50v 20% mono ceramic c7 0r c8 0r 40730 c9 1k .25w 1% metal resisto...

  • Page 32: Pb12 Pcb’S Version 6.3

    Pb12 32 pb12 pcb’s version 6.3.

  • Page 33: Pcb’S Version 6.3

    Pb12 33 pcb’s version 6.3 (cont.).

  • Page 34: Pcb’S Version 6.3

    Pb12 34 pcb’s version 6.3 (cont.).

  • Page 35

    H:\brands\jbl\pb10-12ewrev\vers64 (current screen) scale=0.46 wed oct 24 10:52:35 2001.

  • Page 36

    H:\brands\jbl\pb10-12\pb10newrev\vers72 (current screen) scale=0.45 tue oct 23 10:18:50 2001.

  • Page 37

    H:\brands\jbl\pb10-12\pb10newrev\vers72 (current screen) scale=0.45 tue oct 23 10:20:58 2001.

  • Page 38

    H:\brands\jbl\pb10-12\pb10newrev\vers72 (current screen) scale=0.45 tue oct 23 10:21:54 2001.

  • Page 41

    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 a b c d e f g h i 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 i h g f e d c b a part no: date: drawn: rev. Version 7.0 (pwramp) 14-feb-2001 ms/ll 1 sheet: 2 of 2 1 2 3 4 5 6 un-designated connector not used br rect rs604 r40 1k r41 1000k u1 tlo64 c41 1uf d12 1n5242b d14 1...

  • Page 42

    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 a b c d e f g h i 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 i h g f e d c b a part no: date: drawn: rev. Revision 7.2 (preamp) 25-oct-2001 ms/ll 1 sheet: 1 of 2 6 5 4 3 2 1 conn 1 not used u1 u2 u1 tlo64 u1 r16 not used c9 1k c8 0r c7 0r r15 not used r17 56k2 r14 68k1 r...

  • Page 43

    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 a b c d e f g h i 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 i h g f e d c b a part no: date: drawn: rev. Revision 7.2 (pwramp) 25-oct-2001 ms/ll 1 sheet: 2 of 2 6 5 4 3 2 1 conn 2 not used diode bridge rs604 r40 1k r41 1000k u1 tlo64 c41 1uf d12 1n5242b d14 1n4148 c42 1...