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SERVICE MANUAL
MONO POWER AMPLIFIER
Caution : The part marked with ! is generating a high voltage, so care will be necessary when working.
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6 / 04-A
68E36341S01
MRD-M1001
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-M1001
Contents
Packing Assembly Parts List 4
Packing Method View 4
Specifications 5
Block Diagram 6 to 8
Parts Layout on P.W.Boards and Wiring Diagram 9 to 12
Schematic Diagram 13 to 15
Terminal Voltage of IC/ TR 16 to 19
Description of IC Terminal 20
Exploded View (Cabinet) 21
NOTE : Due to continuing product improvement, specifications and designs are subject to
change without notice.
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MRD-M1001
Packing Assembly Parts List
Symbol Part No. Description Symbol Part No. Description
No. No.
#1 101 68-00493Z18 MANUAL,OWNER'S 104 15E36689S01 COVER,TERMINAL-C
$1 101-1 68-00493Z19 MANUAL,OWNER'S(GE) 105 03E36690S01 WRENCH,HEX. 2.5X2.9
$1 101-2 68-00493Z20 MANUAL,OWNER'S(I.G.S) 106 03E36691S01 WRENCH,HEX. 2X2.3
102 03E36238S01 SCR,M4X20 TPG1 107 03E36692S01 WRENCH,HEX. 4X4.6
103 03E36208S01 SCR,WRENCH M3X12(BOLT)
NOTE : #1 : For North American Model Only, $1 : For General Foreign Model Only, Others : Common.
Packing Method View
106 105
107
103 x2 104
102 x4
101
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MRD-M1001
Specifications
Power Output .................................................................................. 20Hz/100Hz, 4ohm, 1.0% T.H.D., 14.4V : 500W
20Hz, 2ohm, 1.0% T.H.D., 14.4V : 900W
100Hz, 2ohm, 1.0% T.H.D., 14.4V : 1,000W
T.H.D. (100Hz) ......................................................................... 400W/4ohm, 14.4V, Input Level : 0.5 to 8.0V : 1.0%
400W/4ohm, 14.4V, Input Level : 0.1 to 2.0V : 1.0%
Residual Noise (Input Short, Level Position : 0dB) ............................................................................................ 40mV
S/N Ratio (Ref. Output 500W/4ohm, Input short, Level Position : 0dB) .............................................................. 80dB
Frequency Response (Ref. 100Hz, 0dB) ........................................................................................... 20Hz : -0.5