Adcom GFA 5503 Service Manual

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Adcom GFA 5503 Service Manual

Extracted text from Adcom GFA 5503 Service Manual (Ocr-read)


Page 1

SERVICE MANUAL

ADCOM®

details you can hear

3 CHANNEL
POWER AMPLIFIER

GFA-5503

TABLE OF CONTENTS

Introduction ................ 1
Test Procedures ............. 1
Parts List .................. 2
Voltage Conversion ............ 5
Specifications ............... 7
Schematic ................. 8

8551 East Anderson Drive, Suite 105
Scottsdale, Arizona 85260
USA
Tel: 480-607—2277
Fax: 480—348—9876

Web: http://www.adcom.com

Page 8

GFA-5503 SPECIFICATIONS

Power Rating (To FTC Requirements)
200 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
350 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

IM Distortion (SMPTE)
1 watt to 200 watts into 8 ohms
1 watt to 350 watts into 4 ohms

S 0.05%
.. S 0.05%

IM Distortion (CCIF, Any Combination trom 4kHz to 20kHz)
200 watts into 8 ohms .. g 0.04%
350 watts into 4 ohms .. s 0.04%

THD + Noise at 200 watts into 8 ohms (Typical)

20HZ ..... 0.018%
1kHZ ..... 0.02%
10kHZ... 0.07%
20kHZ ..... 0.13%

THD + Noise at 350 watts into 4 ohms (Typical)

20Hz.. . 0.018%

1kHz.. 0.02%

10kHZ... 0.08%

20kHz... .. 0.16%
Frequency Response @ 1 Watt into 8 ohms (10Hz to 20kHz) ... +0, -0.25dB
Power Bandwidth (-3dB) ... 3H2 to 130kHz
Dynamic Headroom into 4 ohms ... 1.7 dB
Signal to Noise Ratio, “A” Weighted (200 watts into 8 ohms) . 2 100dB
Gain .... 29dB
Input Sensitivity

for 1 Watt ..... .. 0.1 volts

.. 1.4 volts

for 200 Watts..


Input Impedance .. 49.9kQ
Damping Factor (20Hz to 20kHz) .... 2 700
Rise Time (5kHz, 90V, peak-to-peak square wave, 20% to 80%) .. 1.5pS
Power Consumption (Continuous, All Channels Driven)
Quiescent. .. 199VA
Maximum.. .. 855VA
80 watts into 8 ohms. 1440VA
125 watts into 4 ohms.. ..... 720VA
Power (Available in 230VAC on special order) ..... 115VAC - 50/60Hz
Chassis Dimensions . 7” (178mm) x 17” (432mm) x 16” (406mm)
Maximum Dimensions. 7 1/4” (184mm) x 17” (432mm) x 16” (406mm)
Weight .. .. 57 lb. (20 kg)


Weight, Packed .. . 63 lb. (23 kg)