ALPINE MRV-F345 CAR POWER AMPLIFIER Service Manual

SERVICE MANUAL 4 CHANNEL POWER AMPLIFIER 1 / 05-A 68E37844S01 MRV-F345 "Schematic Diagram cannot use a reference function"

<Cautions for Safe Repair Work> The following cautions will prevent accidents in the workplace and will ensure safe products. *The symbols indicate caution is needed to prevent injuries and damage to property. The symbols and their meanings follow. *The following symbols indicate two levels of cautions. When you see this symbol, you have to be very careful. When you see this symbol, you have to follow the instructions there. Do not look squarely into the laser light Fuse Caution coming from the pickup. Always use a designated fuse. You may loose you sight. Use of an incorrect fuse may result in a fire. Do not allow wiring to be caught in the Battery Caution screw/chassis. Use the designated battery. If wiring is caught in the screw/chassis, it may Confirm the correct polarity and seat of the cause a short circuit, resulting in a fire. battery. An incorrect battery or an improperly connected or seated battery may result in a fire. High Temperature Caution Designated Parts Caution Touching the heat sink may cause severe burns. Look up the part list and ensure that only designated parts are used to prevent problems or accidents. Reverse Power Supply Connections or Wiring Caution Misconnections Caution Ensure that the wiring is correct when rewiring to Reverse power supply connections or prevent problems with ignition/breakdown. misconnections may cause ignition problems and smoke may result. Soldering Caution Wear Gloves Hot solder from solder splash may cause severe Wear gloves to prevent electrical shocks or injury burns. from the end face of the metal. If you ignore this symbol and handle the product incorrectly or unsafely, injury or only material damage may result. If you ignore this symbol and handle the product incorrectly or unsafely, serious injury or death may result. Warning Caution Warning Caution

MRV-F345 Contents Packing Assembly Parts List 4 Packing Method View 4 Specifications 5 Extension Cable 6 Block Diagram 7 Parts Layout on P.W.Boards and Wiring Diagram 8 to 10 Schematic Diagram 11 to 17 Terminal Voltage of IC/TR 18 to 21 Description of IC Terminal 22 Exploded View (Cabinet) 23 NOTE : Due to continuing product improvement, specifications and designs are subject to change without notice.

MRV-F345 Packing Assembly Parts List Part No. Part No. 101-1 03E38301S01 SCR,M4X20 BLK 101-2 03E38302S01 WRENCH,M2.5 101-3 03E38303S01 WRENCH,M4 #1 102 68-02278Z39 OWNER'S MANUAL $1 102 68-02278Z40 OWNER'S MANUAL $1 102 68-02278Z41 OWNER'S MANUAL NOTE:#1:For North American Model Only,$1:For General Foreign Model Only,Others:Common. Packing Method View Description No. No. Symbol Symbol Description 101 -1 101 -2 101 -3 MRV-F345

Specifications Power Output ............................................................................. 4ohm x 4ch, 0.3% T.H.D.+N, 20Hz to 20kHz : 75W ch 3/4 : 2ohm & 2ohm, 0.8% T.H.D.+N, 20Hz to 20kHz : 150W ch 3/4 : 4ohm-BTL, 0.8% T.H.D.+N, 20Hz to 20kHz : 300W T.H.D. ............................................................................................. 4ohm x 4ch, 75W Power, 20Hz to 20kHz : 0.08% ch 3/4 : 2ohm & 2ohm, 150W Power, 20Hz to 20kHz : 0.8% ch 3/4 : 4ohm-BTL, 300W Power, 20Hz to 20kHz : 0.8% Input Sensitivity (RCA Voltage) ................................. Input Gain 0.2V position, 17.4V sine wave output : 0.25±0.5V Input Gain 4.0V position, 15.0V sine wave output : 4.0±0.5V Pre Out Level (Input 0.5Vrms) ...................................................................................................................... 0.5±0.1V Frequency Response (1kHz 0dB, 1W) .............................................................................................. 20Hz : -1 to 0dB 50kHz : -1 to 0dB Channel Separation (Input shorted, 1kHz, 1W) .................................................................................................. 55dB S/N Ratio (Input shorted, Signal : 75W) ............................................................................................................. 90dB Remote Voltage (ON/OFF) ........................................................................................................................... 5 to 7.5V Current Drain ...................................................................................... Remote (Remote Voltage 14.4V) : 1.3±0.3mA No Signal : 0.7 to 2.5A 75W x 4 Output (4ohm x 4ch, 1kHz) : 43±4A Back up (15 seconds later) : 5mA Fuse Requirement .................................................................................................. 30A (Peak) x 2 (For Battery Line) Power Source ......................................................................................................................... DC14.4V (10.5 to 16V) Dimensions (W x H x D) ............................................................................................................. 330 x 61 x 227.8mm Weight ................................................................................................................................................................ 3.5kg NOTE : Due to Continuing product improvement, specifications and designs are subject to change without notice. MRV-F345

MRV-F345 Extension Cable *Always connect the Extension Cable when making checks of voltage and repair. CN702 CN501 CN502 MAIN P.W.Board CN520 CN540 VR1 P.W.Board VR2 P.W.Board (2) (1) (3) (1) No Extension * (2) No Extension * (3) 01E37824S01 CN602 * It is possible to use by existing cable in product. LCD P.W.Board

Block Diagram MRV-F345 RCA INPUT 4CH MIX MIX MIX MIX 2CH LINE OUT ISO. AMP BUFFER VOLUME IC VARIABLE FILTER VARIABLE FILTER FLAT FLAT LPF LPF HPF HPF ch1 ch2 ch3 ch4 INPUT SELECTOR FILTER X20 FREQ VR MUTE MUTE ch2 POWER AMP ch1 POWER AMP SPEAKER TERMINAL ch1 ch2 VOLUME IC VARIABLE FILTER VARIABLE FILTER FLAT FLAT LPF LPF HPF HPF FILTER X20 FREQ VR MUTE MUTE ch4 POWER AMP ch3 POWER AMP SPEAKER TERMINAL ch3 ch4 VOL_CONTROLL MUTE DRIVE MUTE DC-OFFSET , OUTPUT-CURRENT-LIMIT CE1 , CE2 , CL , DI FREQ , X20 OUTPUT THERMAL DETECT OUT_THRM 9V REG 5V REG to VOLUME IC to LCD POW P1 LM20 AD THRM DET THERMAL DETECT 2 AD THRM VOLTAGE DETECT AD VOLT VOLTAGE DETECT AD VOLT BD5243G B DET BD5242G RESET BR24L01A I2C (SDA SCL) FAN DRIVE FAN1 , FAN2 uPC494 POW P2 38V to AMP 15V REG to OP-AMP LCD CE,DI,CLK,INH KEY AD-KEY LED LED BUFFER DIN,DOUT,CLK AMPLINK DIN 6P uCOM 5V REG REM-ON to uCOM POWER TERMINAL +B REM GND DC/DC Conv. DC FAN 40V

Orange Color Pattern:Component Side Pattern Blue Color Pattern:Foil Side Pattern MRV-F345 Parts Layout on P.W.Boards and Wiring Diagram(1/3) MAIN P.W.Board (Component Side View) 11 1 1 17 17 16 2 2 1 B E B E B E B E B E B E B E 1 1 1 1 1 1 1 1 1 4 1 5 1 3 4 2 1 1 3 3 1 3 1 1 B G D G D G D G D E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E 3 2 4 6 3 4 16 From LCD P.W.Board (CN602) BLK WHT(1) WHT(5) WHT(4) WHT(2) WHT(6) WHT(9) WHT(7) WHT(8) WHT(10) WHT(3) To CN702 1 11 17 1 To CN501 2 16 To VR2 P.W.Board (CN540) To VR1 P.W.Board (CN520) 16 2 To CN502 1 17 1 2 3 4 5 A F G E D C B

Orange Color Pattern:Component Side Pattern Blue Color Pattern:Foil Side Pattern MRV-F345 Parts Layout on P.W.Boards and Wiring Diagram(2/3) MAIN P.W.Board (Foil Side View) B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B 1 2 5 3 1 2 5 3 1 2 5 3 1 2 5 3 3 1 4 5 3 1 4 5 E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E B E 1 2 3 4 5 A F G E D C B

Orange Color Pattern:Component Side Pattern Blue Color Pattern:Foil Side Pattern VR1 P.W.Board (Component Side View) MRV-F345 Parts Layout on P.W.Boards and Wiring Diagram(3/3) VR2 P.W.Board (Component Side View) LCD P.W.Board (Component Side View) VR1 P.W.Board (Foil Side View) VR2 P.W.Board (Foil Side View) LCD P.W.Board (Foil Side View) 17 1 To MAIN P.W.Board (CN501) To CN520 To CN540 To MAIN P.W.Board (CN502) 1 17 1 11 To CN602 WHT(3) WHT(10) WHT(8) WHT(7) WHT(9) WHT(6) WHT(2) WHT(4) WHT(5) WHT(1) BLK To MAIN P.W.Board (CN702) CN601 ASS'Y,WIRE 11P 2 1 To CN603 ASSY,FAN F4010BQ-12 FAN1 M BLK RED E 2 1 B E B E 32 17 1 16 32 17 1 16 B 1 2 3 4 5 A F G E D C B CABLE,FLAT 17P CN521 CABLE,FLAT 17P CN541

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ALPINE MRV-F345 CAR POWER AMPLIFIER Service Manual

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