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POWER SUPPLY PCB 

 

 

 

 

 

 

SCHEMATIC ADCOM 

PART 

NUMBER DESCRIPTION 

 

LOCATION  

 

 

C01 

 

CAPACITOR ELEC 

1000uF 25V 

C18  

SPARK 

KILLER 

 

C02 

 

CAPACITOR ELEC 

220uF 16V 

D1-D6  

DIODE 

1N4004 

F1  

MAIN 

FUSE 

12A 

F2  

STANDBY 

FUSE 

1A 

K1  

TURN-ON 

RELAY   

LED1 

 

POWER LED 

LTL1204 (RED) 

Q1  

TRANSISTOR 

MPSA13 

R1  

RESISTOR 

1K 

1W 

R2  

RESISTOR 

3.32K 

R3  

RESISTOR 

10K 

R4  

RESISTOR 

3.32K 

T1  

STANDBY 

TRANSFORMER 

 

TH1  

THERMISTOR 

CL100 

U2  

REGULATOR 

IC 

7812 

  

POWER 

SWITCH  

 

 

 

 

OTHERS  

 

 

 

 

 

 

SCHEMATIC ADCOM 

PART 

NUMBER DESCRIPTION 

 

LOCATION  

 

 

T2 
T2 

 MAIN 

TRANSFORMER 

MAIN TRANSFORMER 

Multi Voltage Models
115VAC only Models

  

FOOT 

 

  

FRONT 

PANEL   

  

HEATSINK 

 

  

POWER 

BUTTON  

 

 

POWER BUTTON FRAME 

 

  

TOP 

COVER 

 

 
 

Summary of Contents for GFA-7605

Page 1: ...TABLE OF CONTENTS Introduction 1 Test Procedures 1 Parts List 2 Voltage Conversion 5 Specifications 7 PCB Layouts 8 Schematic 9 8551 East Anderson Drive Suite 105 Scottsdale Arizona 85255 USA Tel 480...

Page 2: ...LONGEVITY OF THE AMPLIFIER BIAS ALIGNMENT The component references are the same for all channels Operate the amplifier without load or input connection for this adjustment 1 Turn the amplifier on and...

Page 3: ...F 100V C17 CAPACITOR ELEC 22uF 35V C18 CAPACITOR ELEC 10000uF 63WV C19 CAPACITOR ELEC 10000uF 63WV C20 CAPACITOR MYLAR 0 22uF C21 CAPACITOR MYLAR 0 22uF C22 CAPACITOR ELEC 100uF 16V C23 CAPACITOR ELEC...

Page 4: ...8 RESISTOR 100 R19 RESISTOR 475 R20 RESISTOR 37 4 R21 RESISTOR 37 4 R22 RESISTOR 75 R23 RESISTOR 2 74K R24 RESISTOR 1K R26 RESISTOR 392 R27 RESISTOR 392 R28 RESISTOR 10 R29 RESISTOR 49 9 R30 RESISTOR...

Page 5: ...N RELAY LED1 POWER LED LTL1204 RED Q1 TRANSISTOR MPSA13 R1 RESISTOR 1K 1W R2 RESISTOR 3 32K R3 RESISTOR 10K R4 RESISTOR 3 32K T1 STANDBY TRANSFORMER TH1 THERMISTOR CL100 U2 REGULATOR IC 7812 POWER SWI...

Page 6: ...tch is different in both versions In the multivoltage unit this connecting block has 5 pair of mounting leads as is shown in the figures below In the 120VAC only version the connecting block has only...

Page 7: ...shown in figure 2 4 Add heavy gauge wire between screw down portion of terminals as shown 4 Change the rear panel AC fuse from 6A to 12A AGC Place a sticker on the rear panel at the fuse holder to sho...

Page 8: ...1kHz 0 0012 10kHz 0 02 20kHz 0 025 THD Noise at 150 watts into 4 ohms Typical 20Hz 0 025 1kHz 0 025 10kHz 0 035 20kHz 0 045 Frequency Response 1 Watt into 8 ohms 10Hz to 20kHz 0 0 25dB Power Bandwidth...

Page 9: ...8...

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