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Harman JBL GTO-751EZ Service Manual
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Harman JBL GTO-751EZ Service Manual

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GTO-751EZ
subwoofer amplifier
Service Manual

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Summary of Contents for Harman JBL GTO-751EZ

  • Page 1 GTO-751EZ subwoofer amplifier Service Manual...
  • Page 2 GTO-751EZ - CONTENTS - SPECIFICATIONS ………………………………………..2 CONNECTIONS……………………………………………3 BASIC TROUBLESHOOTING… ………………..……..6 PACKAGING EXPLODED VIEW ……………....7 EXPLODED VIEW …..………..…….….….…………..8 ELECTRICAL PARTS LIST……………………………..9 PCB DRAWINGS…………….……….……….…….……19 BLOCK DIAGRAM…………………………..…..……21 SCHEMATIC………..….…….……………….…...….…..22 GTO-751EZ Number of Channels: Power Output (CEA 2006A): 500W RMS x 1 channel at 4 ohms, 14.4V DC, <1.0% THD 750W RMS x 1 channel at 2 ohms, 14.4V DC, <1.0% THD Max Power: 1200W x 1 channel at 2 ohms (50Hz), 15.5V DC, 10% THD...

  • Page 3: Connecting The Power And Ground

    GTO-751EZ CONNECTING THE POWER AND GROUND The GTO subwoofer amplifiers are capable of delivering extremely high power levels, and require a heavy-duty and reliable connection to the vehicle’s electrical system to achieve optimal performance. Please adhere to the following instructions carefully. Using the Connectors GTO subwoofer amplifiers use the same type of screw terminals for power and speaker connections.

  • Page 4: Subwoofer Connection

    GTO-751EZ Power Connection 1. Connect a wire (minimum 6AWG – 13.2mm – for the GTO-1001EZ; minimum 8AWG – 8.4mm –for the GTO-751EZ and GTO-501EZ) directly to the battery’s positive (+) terminal. 2. Install a fuse holder for a 120A fuse (GTO-1001EZ), 80A fuse (GTO-751EZ) or 50A Fuse (GTO-501EZ) on this wire within 18"...

  • Page 5: Input Connections

    GTO-751EZ INPUT CONNECTIONS Input Connectors Use RCA audio cables to connect source units with preamp-level outputs to the amplifier; use the supplied bare wire- to-RCA adapters to connect to source units that don’t have RCA output connectors. Use a small Phillips screwdriver to loosen the adapter’s set screws and insert the speaker wires into the holes on the back of the adapter.

  • Page 6: Troubleshooting

    GTO-751EZ TROUBLESHOOTING If your amplifier isn’t performing the way you think it should, check to see if the problem is covered in this section before calling your dealer or contacting JBL customer service. PROBLEM CAUSES AND SOLUTIONS No sound (the amplifier’s •...
  • Page 7 GTO-751EZ...
  • Page 8 GTO-751EZ...
  • Page 9 GTO-751EZ name spec position AGTO751M0002 GTO-751EZ Harman-US,GTO-751EZ, PCBA semi-finished GTO-751EZ,AMP board,DIP process 88AM03200264 products test AV2,-8.4-13AN (WR) 2 holes on the 1.20203E+11 RCA jacks RCA1 white the red 4-pin 6PIN black 90 1.21103E+11 Phone jack DIP 10 milliohms ± 1% of Manganese...
  • Page 10 GTO-751EZ name spec position 1533 #28/ 1C+S 2468 #26/7P ,11PIN,2.54MM,L=100MM , 1533 # 28 / (1C + S) * 2 1.70503E+11 Shielded cable shielded cable Black + UL # 2468 26/7P red and white row, 11PIN 2.54MM, L = 100MM, double-headed with XH terminal DIP, 2PIN, JSZ2-25, black plastic, nickel- 1.20903E+11...
  • Page 11 GTO-751EZ name spec position DIP, 55UH, 45A, feet away from the 30123000118 Power inductors 51mm two-pin yellow paper wrapped around pin 23 mm tinned PCBA semi-finished GTO-751EZ, amplifier board, AI 88AM03100264 products processing outsourcing. DIP 100uF/25V ± 20% 6.3 * 7mm 105 Electrolytic C107,C108,C111,0C112, 20513000083...
  • Page 12 GTO-751EZ name spec position 10103000017 chip resistor SMD 1K 1/10W ±1% 0603 R63,R64,R70,R71 10103000403 chip resistor SMD 1K 1/8W ±1% 0805 R65,R68 10103000560 chip resistor SMD 10K 1/4W ±5% 1206 10103000026 chip resistor SMD 1M 1/10W ±1% 0603 R11A D22,D23,D24,D25,D37,D 38,D38M,D39M,D40,D40 M,D41M,D42,D43,D44,D 40103000020...
  • Page 13 GTO-751EZ name spec position R75,R76,R77,R79,R80,R 10103000501 chip resistor SMD 47 1/8W ±5% 0805 10103000278 chip resistor SMD 4.99K 1/10W ±1% 0603 R102 SMD, 5.1V, DO-213AA, 0.5W, ± 2%, 40203000050 Zener diode 0.1mA test current regulator value in the D35,D36,D51 4.85-5.25 range. Q1,Q04,Q7,Q8,Q9,Q10, 50103000038 Transistor...
  • Page 14 GTO-751EZ name spec position Electrolytic DIP 33uF/50V ± 20% 6.3 * 11MM 105 20513000197 C116 capacitor feet away from the 5MM Tape DIP 2.2uF/50V ± 20% 5 * 11 105 ° C Electrolytic 20513000131 spacing of 5mm braid low leakage C152 capacitor orange...
  • Page 15 GTO-751EZ name spec position DIP, C50K , ± 10%, double, L12, semi- 10703000233 Potentiometer circular handle, horizontal DIP,PTC,200-300 ,300- ,P=5.0 DIP, the PTC, 200- 80513000007 Thermistor-PTC 300 ,300-500 packaged separately, P = 5.0 PCBA semi-finished GTO-751EZ, pre-board AI processing 88FA03100194 products outsourcing.
  • Page 16 GTO-751EZ name spec position GTO1001EZ, double, puzzle a fight 5, 120 * 35 * 1.6mm FR-4, REV: T3-01, 23FA03000197 PCB PCB two-sided green oil, antioxidant treatment 60103000380 SMD TL072 SO-8 U3,U4,U5,U6,U2,U9 10103000128 chip resistor SMD 22K 1/10W ±1% 0603 DIP 224/63V ± 5% yellow braid feet 20743000048 MET capacitance C30,C29...
  • Page 17 GTO-751EZ name spec position LS0201000241 Screw BT3 * 10 is plated with zinc and hard PM3 * 4 \ black zinc plating \ Hard \ LS0101000066 Screw resistance fall. LS0101000227 Screw BM2.6 * 5MM plated colorful LEDPCB1,LEDPCB2 Aluminum alloy, the ADC-12, the GTO- 751EZ, drilling and tapping the paint SR0201100033 heatsink black textured, high-gloss screen...
  • Page 18 GTO751 Box L370 * W305 * H121MM, A3, high strength, mounted 350 grams CH0102000313 color Box gray copper, Harman, four-color, specifically, GTO751 HARMAN, K = K, 388 * 258 * 325MM, WX0302000264 Carton the GTO751 special wheat head, HARMAN BZ0102000142 Pearl film bag 450 * 320 * 0.5MM to play two holes.
  • Page 19 GTO-751EZ...
  • Page 20 GTO-751EZ...
  • Page 21 GTO-751EZ to REMOTE Class D LP pass bass boost crossover INPUT LEVEL REMOTE 50mV-1.5V Integrator Driver LEVEL CONTROL comparator switch 40Hz-200Hz 12dB/ oct 45Hz 0-12dB L input R input simple LED(s) Orange switch green GROUND power supply +12V power(green)/protection(Red) LED block...
  • Page 22 GTO-751EZ +SP1 +SP1 1N4148 D46 1N4148 1N4148 1N4148 TLP181 R116 R117 R118 R119 2.2K SUB SIN RCA-PRO +15V +5V-1 10U/25V R103 -15V 5551 5551 K117 5551 5551 8.2K 100R R106 5401 MUTE 4.7K R114 R115 AO4G JP10 JRC4560 PGND SUB IN R105 SUB SIN JRC4560...
  • Page 23 GTO-751EZ to 12/12 RCA1A C146 100P SX1 NG R159 C140 R165 L3C L-4 47.5K R170 47.5K 10uF/25V SX2 NG 110K R161 +15V 120R/2W R163 U12A R171 C141 R157 R166 R168 JRC4560 RCA-PRO 4.7K 110K 47.5K 10uF/25V HI 1 C144 100uF/35V C139 -15V HI 2...
  • Page 24 GTO-751EZ P+12V 60UH 10R/100M +12V PGND POWER 105/63V 60UH 6A10 1N4148 P+12V T2222 4007 3.3K L7812 -VCC+12V RS1D 10uF/25V Vout 2.7K 10uF/50V/NP 2.2K 10uF/25V 5401 1N4148 3.9V -VCC 5551 ESD1 681/100V RS1D 15KV 4148 4.7K 100uF/25V +12V.D J90MM +12V.D 5551 -VCC 4007 +15V...
  • Page 25 GTO-751EZ R30A D10A +15V 1.3M 1N4148 5551 30.1K SUB SP+ 1N4148 R18A LM393 +15V +15V R16A CON3 R19A R17A LED1 +15V RED HI SUB SP+ +15V +15V R15A 5551 2.2K D11A R31A 5551 R14A 1N4148 1N4148 2.2K R10A R12A LED3 green R11A LM393...
  • Page 26 GTO-751EZ 5V-1 +15V 1N4148 -15V +15V +VCC1 -VCC1 R-IN L-IN R-OUT L-OUT DATA CLOCK +15V -15V -15V JP10 SUB IN SUB SIN TP10 REM1 TP11 +15V TP04 -15V TP12 +VCC-1 TP13 -15V -VCC-1 TP14 TP15 MUTE2 5V-1 TP06 11PIN...