Adcom gcd 575 service manual

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SERVICE MANUAL
GOD-575

SPECIFICATIONS
FREQUENCY RESPONSE : 5Hz~20kHz, +0.1. 415.15
SlGNAL-TO-NOISE RATIO : 10503
DYNAMIC RANGE : 93cm
THD : 0002504,

IMD (TOHz ditterence)

IMD (SMPTE) :
CHANNEL SEPARATION (1 kHz) :
INTERCHANNEL PHASE SH|FT
OUTPUT IMPEDANCE

OUTPUT LEVEL

2 5kHz~0t0001B°/o

10kHz - 0-˜00030/n
15kHz ~Di0015%
0.00!5%

95GB

: 20 kHz - Less than 13°
: Fixed 7 1009

Variable - 1009
Digital - 759

: Fixed - 2.5V RMS

Variable 7 Greater than 4.5V
RMS
Digital - 05V peek-topaak

,- DANGER 1
Invisible laser radiation when open and interlock tailed ordeleated. AVOID DIRECT EXPOSURE TO BEAM.

L J
(- CONTENTS w \
SPECFFICATIONS .................... Front Cover TROUBLESHOOTING ....................... 37
FEATURES ................................. 2 EXPLODED VIEW ......................... 42
FRONT AND REAR PANEL, .................. 3 REPLACEMENT PARTS LIST .................. 44
DISASSEMBLY .............................. 4 BLOCK DIAGRAM ........................... 48
ADJUSTMENT PROCEDURES ................. 6 PRINTED WIRING BOARD .................... 49

DESCRIPTION OF PARTS .................... 11 CIRCUIT DIAGRAM .......................... 51 J
SAFETY PRECAUTIONS \

The following precautions should be observed when servicing.

1t Since many parts in the unit have special safety related characteristics. always use genuine replacement
parts. Especially critical parts in the power circuit block should not be replaced with any substitutes. Critical
parts are marked with A in the schematic diagram and circuit board diagram.

2-˜ Before returning a repaired unit to the customer. the service technician must thoroughly test the unit to
ascertain that it is completely safe to Operate without danger of electrical shock.

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FORMAT : Optical

LASER : GaAIAs semiconductor
SAMPLING RATE : 176.4 kHz
QUANTIZATION BITS : 16-bit linear

POWER 1 120V ACISOHZ
POWER CONSUMPTION I 24 Watts

CHASSIS DIMENSIONS ; 17'1430mm) x

MAXIMUM DIMENSIONS

WEIGHT
ACCESSORIES

1W16"(260mm)x 3"(76mm)

: 17"(430mm) x 11-1!4"(285mm)

x 3-7/16"(87 mm)

: 12lbs. (5.5kg-˜)
: Remote Transmitter AIR-575

Two AA, 1.5V batteries
Low-loss audio cable