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™
Studio Series
S120PII
Powered Subwoofer
Service Manual
JBL Consumer Products
250 Crossways Park Dr.
Woodbury, New York 11797 Rev3 2/2006
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- CONTENTS - BASIC SPECIFICATIONS …………….……..…………..1 DETAILED SPECIFICATIONS ……….……..…………..2 CONNECTIONS………………………...……..…...…..…4 OPERATION ……..………………….……...…….….…...7 BASIC TROUBLESHOOTING..…………………… ……8 BULLETIN JBL2003-06………..…………….………..….9 S120PII AMPLIFIER BLOCK DIAGRAM………………10 S120PII EXPLODED VIEW…………….…………….....11 S120PII TEST SET UP AND PROCEDURE….……....12 S120PII ELECTRICAL PARTS LIST ..……….…….….13 P.C.B. DRAWINGS….……………………………...…….20 S120PII IC/TRANSISTOR PINOUTS..…….
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S120PII Studio Series S120PII 300W Powered Sub/ Plate Amp LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes US 120vac/60Hz Yes 108-132 120 Vrms Normal Operation EU 230vac/50-60Hz Yes 207-264 230 Vrms Normal operation, MOMS required QA Test Parameter Spec Unit Limits Conditions Notes Amp Section Bridge type amplifier, None of the speaker terminals must be connected to system GND at Type (Class AB, D, other) D n/a n/a any time. Load Impedance (speaker) 6 Ohms n/a Nominal Limiter prevents continuo
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S120PII Studio Series QA Test Parameter Spec Unit Limits Conditions Notes Transients/Pops ATO Transient 5 mV-peak n/a @ Speaker Outputs Turn-on Transient 50 mV-peak 2v-pp @ Speaker Outputs AC Line cycled from OFF to ON Turn-off Transient 50 mV-peak 2v-pp @ Speaker Outputs AC Line cycled from ON to OFF Efficiency Efficiency 70 % 65 Rated power Nominal Line voltage 120 VAC Maximum allowable input power under nominal Input voltage and frequency, in stand-by mode Stand-by Input Power 12 Watts 1
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S120PII Studio Series SPEAKER CONNECTION When we designed the description best matches under the collar. Insert the S120PII powered subwoofer, your system and follow the bare end of the wire through our goal was to offer the user corresponding hookup the hole in the post, then the best possible performance instructions. screw the collar back down combined with the most until the connection is tight. To use the binding-post flexible and complete The holes in the center of the speaker terminals
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S120PII Studio Series Dolby Pro Logic (Non-Digital) – Line Level Use this installation method in the “Normal” position. Do terminals on your receiver or for Dolby Pro Logic appli- not use the “LFE” position amplifier. cations (not Dolby Digital, DTS with Dolby Pro Logic-only Make sure your receiver or or other digital processing), processors. processor is configured cor- where the receiver/processor Note: If your receiver or rectly: Make sure that the sub- is equipped with a subwoofer amplifier
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S120PII Studio Series Dolby Digital or DTS (or Other Digital Surround Mode) Connection Use this installation method Note: If your receiver or Make sure that you have for Dolby Digital, DTS or other amplifier has only one configured your surround digital surround processors: subwoofer output jack, sound processor for then you may connect the “Subwoofer On” or “LFE On.” IMPORTANT: Make sure that subwoofer output on your The front left, front right, the LFE toggle switch ™ on receiver/preamplifier
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S120PII Studio Series OPERATION Power The S120PII is equipped with Auto As long as no audio return to Standby mode, both a master Power switch signal is received, the indicated by the LEDs ‚ and an Auto turn-on/turn- subwoofer is in Standby turning red. off switch £. In order to mode to conserve Off The subwoofer is off at function, the S120PII must power, indicated by the all times, even if an be plugged into an active red color of the LEDs on audio signal is present electrical outlet (but not
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S120PII Studio Series Phase Control subwoofer placement and you happen to rearrange your listener position. Adjust the listening room and move Phase switch ¡ to maximize your speakers, you should bass output at the listening experiment with the Phase position. switch ¡ in both positions, and leave it in the position The Phase Control ¡ Remember, every system, that maximizes bass determines whether the room and listener is different. performance. subwoofer’s piston-like action There are no right
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Service Bulletin Service Bulletin JBL2003-06 - April 2003 This is considered a Minor repair To: All JBL Service Centers Model: S120PII Subject: Distortion When Coming Out Of Standby In the event you receive an S120PII subwoofer with the complaint “There is a brief chirping sound, or short oscillation that occurs when the unit is in the AUTO mode, in Standby, when it’s triggered ON with a music signal”, follow the procedure below to correct this condition: Sy
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S120PII Studio Series 10
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S120PII ™ Studio Series EXPLODED VIEW Top Plate 337898-001 Port Tube 337859-001 Top Plate Gasket 338012-001 (12) Screws LED Indicator Assembly PB, HXS. #8 x .75" 335650-001 903802-012 (4) Grille Retainers 333249-001 12" Woofer 338008-001 Amplifier Assembly Not for Sale (4) Rubber Foot Assembly 338037-001 (8) Screws PB, HXS. #8 x .75" 903802-012 Front Grille 338007-001 11 S120PII Studio Series
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S120PII Test Set Up and Procedure SYSTEM AURAL SWEEP TEST Equipment needed: • Function/signal generator/sweep generator • Integrated Amplifier • Multimeter • Speaker cables • RCA phono cables (pair) General Unit Function (UUT = Unit Under Test) Switches/knobs on the amplifier faceplate: Crossover Frequency Adjust full CW (150Hz) Phase switch – either position Normal/LFE switch – Normal Auto On/Off - either position 1. From the signal generator, Connect both right and left
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S120PII Studio Series S120PII ELECTRICAL PARTS LIST Part Number Qty Description Reference Designator Amplifier PCB Resistors 021-100401-020 1 Metal oxide film resistor 1K 1W J FK TYPE R173 021-620303-020 2 Metal oxide film resistor 620R 3WS J 8x20 KINK R76,78 022-005105-020 1 cement resistor PN:SQM 0R05 5W J 25x13 R2 0024-00098-120 1 SMD resistor 0R 1/8W J 0805 TAPING R8 024-100498-120 2 SMD resistor 1K 1/8W J 0805 TAPING R110,169 024-100598-120 14 SMD resistor 10K 1/8W J 0805 TAPING R5,7,16,11
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S120PII Studio Series Part Number Qty Description Reference Designator Semiconductors 051-000600-100 1 Transistor NPN MPSW06RLRA TO-92 TAPING Q6 051-005600-100 1 Transistor NPN MPSW56RLRA MPQ TO-92 TAPING Q8 051-290700-100 4 Transistor P2N2907A TO-92 TAPING Q12,14,16,18 051-540101-000 1 Transistor PNP 2N5401 TO-92 TAPING Q3 051-640000-100 4 MOSFET N-Channel IRF640 TO-220 Q11,13,15,17 052-400080-000 1 Diode Bridge PN:RS804 400V,8A BR1 053-257400-100 1 IC;DIP 8P LM2574 HVN-15V 0.5A Step-Down Volt
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S120PII Studio Series Part Number Qty Description Reference Designator 024-100698-120 1 SMD resistor 100K 1/8W J 0805 TAPING R37 024-110598-120 2 SMD resistor 11K 1/8W J 0805 TAPING R74,99 024-200598-120 2 SMD resistor 20K 1/8W J 0805 TAPING R95,141 024-220398-120 2 SMD resistor 220R 1/8W J 0805 TAPING R136,167 024-220498-121 1 SMD resistor 2K2 1/8W J 0805 TAPING R134 024-220798-120 2 SMD resistor 2M2 1/8W J 0805 TAPING R87,93 024-270498-120 3 SMD resistor 2K7 1/8W J 0805 TAPING R80,84,157 024-3
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S120PII Studio Series Part Number Qty Description Reference Designator Miscellaneous 072-040229-000 1 Header, Right Angle PN:211-107-000-400 7PIN PIN2 072-040230-000 1 Header, Right Angle PN:211-111-000-400 11PIN PIN1 Pre/Input PCB Resistors 021-121598-100 1 metal film resistor 12K1 1/8W F TAPING R204 021-121698-100 1 metal film resistor 121K 1/8W F TAPING R214 021-301498-100 1 metal film resistor 3K01 1/8W F TAPING R220 021-680498-100 2 metal film resistor 6K8 1/8W F TAPING R208,209 024-000098-
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S120PII Studio Series Part Number Qty Description Reference Designator 031-100343-100 2 SMD capacitor 100pF/50V J 0805 NPO TAPING C222,204 031-100344-100 7 SMD capacitor 0u1/50V K 0805 X7R TAPING C227,232,233,229,234,235,230 031-220244-101U 1 SMD capacitor 0u022/50V K 0805 X7R TAPING C202 031-220344-100 2 SMD capacitor 220pF/50V J 0805 NPO TAPING C210,200 031-470144-101 1 SMD capacitor 0u0047/50V K 0805 X7R TAPING C219 031-680144-100 1 SMD capacitor 0u0068/50V K 0805 X7R TAPING C212 033-200695-3
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S120PII Studio Series Part Number Qty Description Reference Designator 074-030018-000 1 Toggle Switch PN:L103-T2-B4 SW202 Control Pot PCB 021-301498-100 2 metal film resistor 3K01 1/8W F TAPING R231,232 026-200595-269 1 VR 20Kx2 FREQ PN:RD163121R03D-20KBx2(EJ) R233 026-500595-254 1 VR 50K LEVEL P/N:RK163111R405-EJ R216 038-100363-300 2 MPE capacitor P:5 0u1/100V J TAPING C218,213 072-040251-000 1 Header, Right Angle PN:211-104-000-400 4PIN 072-040253-000 1 Header, Right Angle PN:211-103
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Part Number Qty Description Reference Designator 071-060280-500 4 nut washer 8#-32 zinc plated 8.5 t=3m/m For Transformer 071-100606-060 2 flat washer PN:WS3-2 OD=6 ID=3.t=2mm nylon For Q11,Q13 073-014044-000 1 Bracket 6.64"x3.50"x3.20" SPCC cadium plated 074-020018-000 1 Rocker Switch (Power) PN:RF1003-BB4-0 SW4 082-022241-000 1 Wire #22 UL1007 L=410mm blk/wht XH2P+HWAFER 082-072620-000 1 Wire #26 UL1007 L=200mm XH7Px2 blk+whtx6 086-021836-000 1 Double insulated cable SPT-2 #18 12feet +T187 Pow
