Yamaha gc2020 compressor service manual

Page 1

2-Channels Compressor/ Limiter

I FRONT PANEL

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, ' SERVICE MANUAL

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I CONTENTS ( a 3X)

IMPORTANT NOTICE , .................. 1 EXPLODED VIEw (MEI) ............... 9
SPECIFICATIONS (that) ................. 2 MECHANISM PARTS (x 73385:) ...... _ ...... 10
DIMENSIONS (fiifil) .................. 2 CIRCUIT BOARDS & ELECTRICAL PARTS
CIRCUITRY OUTLINE ................... 3/5 (>- I autism) .................... 11
Elam; ............................. 4/5 SCHEMATIC DIAGRAM (11313311.) ......... 12
CIRCUIT BOARDS (>- 11:21) ............. 6/7 BLOCK DIAGRAM (7'1: y79'477'5/A) 13
ADJUSTMENTS (mfiflzfi) ............... 8 V

NIPPON GAKKI CU. LTD. HAMAMATSU JAPAN
.25K- 702 IE]® Printed in Japan 85. 3

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GC202O

I SPECIFICATIONS ({iIi)
CHANNEL 2-channels FNAOrC/TITSLRICT'ON 5-segments LED
MODE STEREO Mode/DUAL MONO MOde COMPRESSOR/LIMITER THRESHOLD LEVEL CONTROL
FREQUENCY RESPONSE +2dB, -2dB, 20Hz ~20kHz
INPUT CONTROL at 0 position +32dB ~+5dB
TOTAL HARMONIC L h 0 030/
DISTORTION 955 I an ° ° INPUT CONTROL at Center position +20dB ~-20dB
NOISE LEVEL Less than ~87dB (lHF-A) INPUT CONTROL at 10 position +5dB ~-35d8
INPUT Unbalanced (RCA pin jack, 1/4" mono phone jack) EXPAND NOISE GATE THRESHOLD LEVEL CONTROL
INPUT IMPEDANCE 30k ohms INPUT CONTROL at 0 position OdB ~ --40dB
NOMINAL INPUT LEVEL --IOdB INPUT CONTROL at Center position ~25d8 ~-65dB
MAXIMUM INPUT LEVEL +32dB (INPUT Level Control at ,- INPUT CONTROL at I0 position -40dB ~-80dB
m'mmum ATTACK TIME CONTROL 0.2msec ~20msec
OUTPUT Unbalanced (RCA pin jack, 1/4" mono phone jack) RELEASE TIME CONTROL 50msec ~ 2sec
OUTPUT IMPEDANCE 600 ohms

POWER REQUIREMENTS
NOMINAL OUTPUT LEVEL --10dB

Japanese model ACIOOV, 50/60 Hz
MAXIMUM OUTPUT LEVEL +20d3 US. 8: Canadian models 120V, 60Hz
DETECTOR INPUT Unbalanced RCA pin lack General model 110-120/220-240, 50/60Hz
INPUT IMPEDANCE 30k ohms POWER CONSUMPTIONS
MAXIMUM INPUT LEVEL +20dB Japanese model 11W
DETECTOR OUTPUT Unbalanced RCA pin jack U.S. & Canadian models 18W
OUTPUT IMPEDANCE 600 ohms General model 13W
MAXIMUM OUTPUT LEVEL +20dB DIMENSIONS (W x H x 0) 480mm x 44mm x 235mm
RATIO CONTROL 1 : 1 ~00: 1 l18-7/8"x1-3/4x 9-1/4")
MAXIMUM LIMITING 32dB WEIGHT 3kg (6.6 lbs.)

0d8 is referenced to 0.775 V HMS.
' Specifications subject to change without notice.

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I DIMENSIONS(TJ'$2+:-)

428 (16-7/8") A

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