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SERVICE MANUAL
MONO POWER AMPLIFIER
TO ALPINE Home Page
2 / 04-A
68E36267S01
MRD-M501
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.
If you ignore this symbol and handle the product incorrectly or unsafely,
Warning serious injury or death may result.
If you ignore this symbol and handle the product incorrectly or unsafely,
Caution injury or only material damage may result.
*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.
Warning
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.
Caution
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.
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MRD-M501
Contents
Packing Assembly Parts List 4
Packing Method View 4
Specifications 5
Block Diagram 6
Parts Layout on P.W.Boards and Wiring Diagram 7,8
Schematic Diagram 9 , 10
Terminal Voltage of IC/ TR 11 to 13
Description of IC Terminal 14
Exploded View (Cabinet) 15
NOTE : Due to continuing product improvement, specifications and designs are subject to
change without notice.
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MRD-M501
Packing Assembly Parts List
Symbol Part No. Description Symbol Part No. Description
No. No.
101-1 03E36238S01 SCR(M4X20 TPG1,BLK) 101-6 47E35195S01 WRENCH (4mmX4.6mm)
101-2 03E36208S01 WRENCH BOLT(M3X12(WHT)) #1 102-1 68P04190K32 OWNERS MANUAL(AE)
101-3 15E36257S01 COVER TERMINAL(B) $1 102-1 68P04190K18 OWNERS MANUAL(GE)
101-4 47E22594S01 WRENCH (2.5mmX2.9mm) %1 102-1 68-00346Z15 OWNERS MANUAL(EU)
101-5 01E28659S01 WRENCH (2mmX2.3mm) $1 102-2 68P04190K19 OWNERS MANUAL(I.G.S)
NOTE : #1 : For North American Model Only, $1 : For European Model Only,
&1 : For Chinese Model Only, Others : Common.
Packing Method View
101 -2 101 -1
101 -3
101 -5 101 -4 101 -6
$1
102 -1
102 -2
NOTE : $1 : For European Model Only, Others : Common.
TO CONTENTS
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MRD-M501
Specifications
Power Output (20Hz, 100Hz) ................................................................................. 4ohm, 1% T.H.D., 14.4V : 260W
2ohm, 1% T.H.D., 14.4V : 500W
T.H.D. (100Hz) ................................................................................................................ 200W/ch/4ohm, 14.4V : 1%
S/N Ratio (Ref. Output 275W/4ohm, Input short, Gain Position 0dB) ................................................................. 81dB
Residual Noise (Input Short, Gain Position 0dB) ............................................................................................... 30mV
Frequency Response (Ref. 100Hz, 0dB) ........................................................................................... 20Hz : -0.5