JBL L8400P Service Manual
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JBL L8400P Service Manual

Studio l series amplifier/subwoofer
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See also: Owner's Manual
Studio L Series
L8400P
Amplifier/Subwoofer
SERVICE MANUAL
JBL Consumer Products
250 Crossways Park Dr.
Rev1 3/2006
Woodbury, New York 11797

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Summary of Contents for JBL L8400P

  • Page 1 Studio L Series L8400P Amplifier/Subwoofer SERVICE MANUAL JBL Consumer Products 250 Crossways Park Dr. Rev1 3/2006 Woodbury, New York 11797...

  • Page 2: Table Of Contents

    EXPLODED VIEW……………………………………………….…9 120V BLOCK DIAGRAM..……………………………………..….10 PCB DRAWINGS………………..………………………………...11 120V ELECTRICAL PARTS LIST …………….…….…………..15 INTEGRATED CIRCUIT/TRANSISTOR PINOUTS………..19 120V SCHEMATICS.……….………………………..…. ………20 L8400P BASIC SPECIFICATIONS Amplifier Power (RMS) 600 Watts Peak Dynamic Power * 1200 Watts Frequency Response (–3dB) 22Hz – Low-pass crossover frequency Low-Pass Crossover Frequencies 50Hz –...

  • Page 3: Packaging

    ITEM DESCRIPTION QTY. PART NO. DESCRIPTION QTY. PART NO. 1. Owner’s Manual 354038-001 6. Pad, Foam, Top, Bottom L8400P 353592-001 2. Front Grille 353234-001 7. Y-Adapter Cable 354058-001 3. Warranty Card, JBL 5YR/1YR 338381-001 8. Foot, Bump-On 3M, SJ5744 330104-001 4.

  • Page 4: Detailed Specifications

    8400P L series L8400P Powered Sub/ Plate Amp LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes Vrms Normal Operation US 120VAC/60Hz 108-132 EU 230VAC/50-60Hz 207-264 Vrms Normal operation, MOMS required QA Test Parameter Spec. Unit Limits Conditions Notes Amp Section...
  • Page 5 8400P L series QA Test Parameter Spec. Unit Limits Conditions Notes Amp Section Phase switch 0-180 functional Volume pot Taper (lin/log) functional 5K A Taper 4th Order LP Filter, 2nd order fix and 2nd functional order variable. Variable crossover 50-150 Hz functional Pass through from the speaker input section HP Speaker out...

  • Page 6: Connections

    L8400P L series DOLBY* DIGITAL OR DTS ® (OR OTHER DIGITAL SURROUND MODE) CONNECTION IMPORTANT: Make sure that the subwoofer from possible the LFE/Normal toggle switch damage. Connect this jack to ∞ is in the “LFE” position. the LFE output or subwoofer...
  • Page 7 L8400P L series DOLBY PRO LOGIC (NON-DIGITAL) – SPEAKER LEVEL Use this installation method for Dolby Pro Logic applica- tions (not Dolby Digital, DTS or other digital processing), where the receiver/processor does not have a subwoofer output, or a volume-controlled...

  • Page 8: Operation

    L8400P L series OPERATION Power Move the Master Power switch If you will be away from home used, switch the Master ¢ to the “On” position to use Power switch ¢ to the “Off” for an extended period of time, the L8400P subwoofer.

  • Page 9: Basic Troubleshooting

    L8400P L series Phase Control The Phase Control § deter- Phase switch to maximize having to move your speakers. bass output at the listening If at some time in the future mines whether the sub- position. you happen to rearrange your woofer’s pistonlike action...

  • Page 10: Exploded View

    L8400P Exploded View ITEM ITEM DESCRIPTION QTY. PART NO. DESCRIPTION QTY. PART NO. 1. Woofer Assembly 12" DCR=3.7Ω ±10% 353112-001 7. Assembly, Foot 353354-001 2. Front Grille 353234-001 8. Assembly, Logo 353284-001 3. Grille Cup, BLK 333249-001 9. Screw (Foot) #8 X 1, PB, TRPH CR BLK 903101-016 Grille Cup, BE &...

  • Page 11: 120V Block Diagram

    8400P L series L8400P BLOCK DIAGRAM...

  • Page 12: Pcb Drawings

    8400P L series NOTE: DESIGNATORS ARE WRONG (SWAPPED) FOR L8 AND L11. BOTH DRAWING AND ACTUAL PCB ON MODEL FIFTEEN...
  • Page 13 8400P L series...
  • Page 14 8400P L series...
  • Page 15 8400P L series...

  • Page 16: 120V Electrical Parts List

    8400P L series L8400P (120v) ELECTRICAL PARTS LIST Part Number Description Reference Designator Main Amp/Supply PCB Resistors 024-000098-120 GS SMD resistor 0R 1/8W J 0805 (R8) 024-100498-120 SMD resistor 1K 1/8W J 0805 (R110) R110 R5,7,16,118,121,122,125,1,126,128,138,165,17 024-100598-120 GS SMD resistor 10K 1/8W J 0805...
  • Page 17 8400P L series Part Number Description Reference Designator Main Amp/Supply PCB 054-414803-100ZR GR SMD DIODE PN:LL4148GSO8 (Vishay)() D4-5,13,14,21,22,31,33,38,41,45,48,34,6,90,91, 054-540100-100 SMD Transistor (PNP) PN:MMBT5401 LT1 SOT-23 (Q1) 054-555100-100 SMD Transistor (NPN) PN:MMBT5551 LT1 (ON)(Q2) 051-002301-000 MOSFET N CHANNEL PN:FB23N20D Q11,13,15,17 052-400080-000 Bridge Rectifier PN:RS804 400V,8A (BR1) 053-257400-100...
  • Page 18 8400P L series Part Number Description Reference Designator Drive board Semiconductors 054-000100-100 GS SMD DIODE: PN:ES1D 200V 1A (D35,43) D35,43 054-001002-100 SMD ZENER DIODE PN:BZX84C10 10V SOT-23 (D42,49) D42,49 054-005501-100 SMD ZENER DIODE PN:BZV55C3V6 (PHILIPS)(D60) 054-007200-100L SMD IC: PN:M072M-TE1 DMP8 (JRC) DUAL OP-AMP U9,10 054-033906-100 SMD transistor PN:MMBT3906LT1 SOT23 (ON(Q34,35)
  • Page 19 072-040096-000 Terminal T187MA(PCB TYPE) (t=0.8mm) PC187(0.8) TER1,3,4 Miscellaneous/Mechanical parts 042-010139-000 Power Transformer PN:YT-13438 CSW-10 120V/60Hz 063-252623-900 Front Panel (L8400P 120V) 10"x10"x0.0984" SPCC black 073-014084-500 Bracket 6.64"x3.5"x3.2" SPCC 074-020018-000 ROCKER SW (POWER) PN:RF1003-BB4-0 086-021836-000 Power Cord SPT-2 #18 12 ft. +T187膠套...

  • Page 20: Integrated Circuit/Transistor Pinouts

    8400P L series...

  • Page 21: 120V Schematics

    8400P L series...
  • Page 22 L8400P L series...
  • Page 23 L8400P L series...
  • Page 24 8400P L series...

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