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Table of Contents
- 1 Table of Contents
- 2 Introduction
- 3 Test Procedures
- 4 Bias Alignment
- 5 Bias Adjustment
- 6 Gfa-5300 Service Parts List
- 7 Amplifier Pcb
- 8 Main and Standby Power Supply Pcb
- 9 Gfa-5300 Voltage Conversion
- 10 Converting from 115VAC to 230VAC
- 11 Converting from 230VAC to 115VAC
- 12 Gfa-5300 Specifications
- Download this manual
SERVICE MANUAL
2 CHANNEL
POWER AMPLIFIER
GFA-5300
TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . 1
Test Procedures . . . . . . . . . . . . . 1
Parts List . . . . . . . . . . . . . . . . . . 2
Specifications . . . . . . . . . . . . . . . 5
Chassis Layout . . . . . . . . . . . . . . . 5
PCB Layout . . . . . . . . . . . . . . . . . . 7
Wiring Diagram. . . . . . . . . . . . . . . . 8
Schematic . . . . . . . . . . . . . . . . . 9
10 Timber Lane
Marlboro, NJ 07746
USA
Tel: 732-683-2356
Fax: 732-683-9790
Web: http://www.adcom.com
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Table of Contents
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Summary of Contents for Adcom GFA-5300
- Page 1 SERVICE MANUAL 2 CHANNEL POWER AMPLIFIER GFA-5300 TABLE OF CONTENTS Introduction ....1 Test Procedures ... . . 1 Parts List .
- Page 2 BE ACCESSIBLE ONCE ITS TOP COVER IS REMOVED. DO NOT ATTEMPT FAMILIARIZATION, INSPECTION, OR ANY PROCEDURE WHATSOEVER UNLESS YOU HAVE DISCONNECTED THE GFA-5300 FROM THE WALL AC OUTLET OR OTHER SOURCE OF AC POWER AND THE POWER-SUPPLY CAPACITORS ARE COMPLETELY DISCHARGED. THESE INSTRUCTIONS ARE PROVIDED FOR USE ONLY BY COMPETENT TECHNICAL PERSONNEL.
- Page 3 GFA-5300 SERVICE PARTS LIST AMPLIFIER PCB FOR RIGHT CHANNEL REPLACE 0XX WITH 1XX SCHMATIC ADCOM PART NUMBER DESCRIPTION LOCATION C001 12005385 CAPACITOR ELEC 47uF 63V C002 12001415 CAPACITOR POLY 39pF 50V C004 12001275 CAPACITOR MYLAR 2.2uF 250v C005 12005325 CAPACITOR ELEC 4.7uF 50V...
- Page 4 R007 27004670 RESISTOR 100R SCHMATIC ADCOM PART NUMBER DESCRIPTION LOCATION R008 27004570 RESISTOR 221R R010,R012 27004200 RESISTOR R013 27004570 RESISTOR 221R R014 27004300 RESISTOR R015 27004110 RESISTOR R016 27004135 RESISTOR 4.99K 1/2W R017 27004570 RESISTOR 221R R018 27004400 RESISTOR 1.82K...
- Page 5 MAIN AND STANDBY POWER SUPPLY PCB SCHMATIC ADCOM PART NUMBER DESCRIPTION LOCATION C201 12005700 SPARK KILLER 4700pF 400V C202,C203 12005005 CAPACITOR ELEC 10000uF 63V C204,C205 12001235 CAPACITOR MYLAR 0.1uF 250V C206,C207 12005005 CAPACITOR ELEC 10000uF 63V C208,C209 12001235 CAPACITOR MYLAR 0.1uF 250V...
- Page 6 GFA-5300 VOLTAGE CONVERSION Certain versions of the GFA-5300 are cabable of operating at multiple voltages.The conversion described below is for multivoltage versions of the GFA-5300. Multivoltage versions of the GFA-5300 have removable power cords. Converting from 115VAC to 230VAC 1) With the Unit unplugged, remove the top cover of the GFA-5300.
- Page 7 GFA-5300 SPECIFICATIONS Power Rating (To FTC Requirements) 80 watts continuous average power per channel into 8 ohms at any frequency between 20Hz to 20kHz with all channels driven at less than 0.18% THD 125 watts continuous average power per channel into 4 ohms at any frequency between 20Hz to 20kHz with all channels driven at less than 0.18% THD...