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Alpine 3544 Service Manual

Alpine 3544
26 pages
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AILPINE
wanuat
Bridgeable
Power
Amplifier
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Alpine 3544 Specifications

General IconGeneral
Power Output (RMS)50W x 4
RMS Power at 4 Ohms50W x 4
RMS Power at 2 Ohms75W x 4
Bridged RMS Power at 4 Ohms150W x 2
Frequency Response10Hz - 50kHz
Input Sensitivity200mV - 4V

Summary

Specifications

4-Ohm 2-Channel Stereo Mode

Details power output, input sensitivity, frequency response, etc. for 4-ohm stereo.

2-Ohm 2-Channel Stereo Mode

Details power output and current drain for 2-ohm stereo operation.

4-Ohm BTL Mono Mode

Details power output and current drain for 4-ohm BTL mono operation.

General Specifications

Covers fuse, power source, component count, dimensions, and weight.

Amplifier Features

2/1 Channel Operation Modes

Explains stereo and bridged operation modes and power outputs.

Status Monitor Indicator

Describes the function of the status indicator light for operation and protection.

Circuit Technologies

Details Duo-Beta, No Current Limiting, and S.T.A.R. circuit features.

Optional Speaker Level Input

Details using an accessory for head units without preamp outputs.

Switches and Terminals

Input Mode Selector Switch Settings

Details the "ST", "L (MONO)", and "L+R" positions for input signal selection.

Fixed/Variable Input Selector Settings

Explains "FIXED" and "VARIABLE" positions for input sensitivity adjustment.

Controls and Indicators

Input Gain Control Adjustment

Explains how to adjust the input gain control for optimal volume.

Status Monitor Indicator Function

Explains the green and orange status indicator lights and their meanings.

Characteristic Curves

Power vs. Distortion Curve

Graph showing Total Harmonic Distortion versus output power at 1kHz/4 ohms.

Frequency Response Curve

Graph showing frequency response from 20Hz to 100kHz at 1W/4 ohms.

Amplifier Connections

RCA Input and Speaker Output Terminals

Details the connection of RCA input jacks and speaker output terminals.

Power and Remote Connections

Explains connections for battery lead, ground lead, and remote turn-on lead.

Head Unit Interfacing

No Pre-Amp Output Installation

Details using speaker outputs with an interface for head units lacking preamp outputs.

Safety and Installation Precautions

Wiring Connection Precautions

Warns about improper wiring causing damage and emphasizes following instructions.

Battery Lead Connection

States the battery lead connection should be the last step after all others are made.

Connection Security

Stresses clean and secured connections for high-power output to prevent damage.

Mounting for Heat Dissipation

Advises mounting the amplifier for free air circulation and heat dissipation.

Fuse Replacement

Emphasizes using fuses of the same amperage to prevent component damage.

Disassembly Instructions

Bottom Cover Removal

Details removing the bottom cover using specific screws.

Main P.C.Board Removal

Outlines steps for removing the main PC board, including screws and components.

Adjustment Procedures

Power Supply Voltage Adjustment

Details connecting a meter and adjusting VR801 for the correct power supply voltage.

Idling Adjustment

Explains connecting a meter and adjusting VR501/VR502 for the correct idling voltage.

Block Diagram

Input and Output Interfaces

Shows RCA input, speaker terminals, and power/remote connectors.

Power Supply and Control Circuits

Depicts DC-DC converter, muting, remote control, and protection circuits.

Amplifier Stages

Illustrates buffer, amplifier stages, and driver circuits within the block diagram.

Parts Layout on P.C. Boards

RCA P.C. Board Layout

Shows component placement for the RCA input circuit board.

SP Out P.C. Board Layout

Shows component placement for the Speaker Output circuit board.

Main P.C. Board Layout

Details component placement on the main printed circuit board.

Schematic Diagram

Schematic - Left Section

Shows the left portion of the schematic diagram, including input and driver stages.

IC and Transistor Voltage Values

Secondary Ground IC Voltages

Lists voltage values for IC501, IC502, IC201, IC202 under secondary ground reference.

Primary Ground IC Voltages

Lists voltage values for IC503, IC801, IC802 under primary ground reference.

Transistor Voltage Values

Provides voltage measurements for various transistors under primary and secondary ground references.

Exploded View (Cabinet)

Cabinet Assembly Parts List

Electrical Parts List - ICs, Transistors, Diodes

Integrated Circuits (ICs)

Lists part numbers and descriptions for various ICs used in the amplifier.

Transistors

Lists part numbers and descriptions for transistors used in the amplifier.

Diodes

Lists part numbers and descriptions for diodes used in the amplifier.

Capacitors

Lists part numbers and descriptions for capacitors used in the amplifier.

Component Lists (Continued)

Capacitors and Coils

Lists part numbers and descriptions for capacitors and coils.

Thermistors, Switches, and Resistors

Lists part numbers and descriptions for thermistors, switches, and resistors.

Volumes and Miscellaneous Parts

Variable Resistors (Volumes)

Lists part numbers and descriptions for variable resistors (potentiometers).

Miscellaneous Components

Lists part numbers and descriptions for miscellaneous items like fuses and connectors.

Packing Information

Packing Method View

Illustrates the method used for packing the amplifier for shipment.

Packing Assembly Parts List

Lists the parts included in the packing assembly.

Semiconductor Lead Identifications

µPC4570C (IC201, 202) Identification

Shows the pinout and identification for the µPC4570C integrated circuit.

µPC1298V (IC501, 502) Identification

Shows the pinout and identification for the µPC1298V integrated circuit.

82675F02 (IC503) Identification

Shows the pinout and identification for the 82675F02 integrated circuit.

More Semiconductor Identifications

µPC494C and P52401 ICs

Shows lead identifications for µPC494C and P52401 integrated circuits.

Transistor Lead Identifications

Displays lead identifications for various transistors like 2SD1996, 2SC3423, 2SA1358, etc.

Additional Semiconductor Identifications

Various Transistor Identifications

Shows lead identifications for transistors 2SB1076M, 2SC4024, 2SD1065, etc.

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