Arcam RDAC - Panduan Servis - Halaman 2

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Halaman Cetak

Overview

The rDac is a D to A convertor featuring Optical / Coaxial and USB inputs and utilizes a simple

push button to cycle between the input option – when locked on to data the LED in front of the

relevant source will light Green and audio should be present if the LED is RED in color the input

is not locked onto relevant data.

Compatible formats include.

All PCM 2 channel

Input / bit depth

USB 16 & 24 Bit

Optical 16 & 24 Bit

Coaxial 16 & 24 Bit

Wireless 16 Bit

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Power supply

circuit page 5

A external 6v 600ma D.C power supply is used to supply the required power to the Connector

at location CON400 this is then switched by the rear panel mounted power switch at location

SW400, D400 is used for PSU monitor by associated circuitry formed by IC105 and IC104, D401

is used to prevent reverse bias of the PSU, the supply is then filtered by the network of L400

and C400 to form the main PSU source of +6v D.C.

The rDac features 7 separate regulated powers supplies details appear in the table below

Regulator

Voltage (d.c)

locations

REG400

+5v

REG401

+3V3

REG402

+3V

REG403

+5v

REG404

+3v3

REG405

+5v

IC400

‐5v

IC107

+1.8

32kHz 44.1kHz 48kHz

Yes

Components associated

Kleer option, optical input rec, LED array via IC102

IC 100, 103, 104, 108, 107, 200, 201, 202, 203, 204, 205, 206, 301

mute circuit

SPDIF receiver

Output stage +5v

Oscillator

DAC

Output stage ‐5v

Main micro core voltage

88.2kHz 96kHz 176kHz 192kHz

Yes

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