ATI Audio DA2008 운영 및 유지보수 매뉴얼 - 페이지 5

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Caution: Balanced differential outputs have active drivers for both HI and LO

output terminals. DO NOT GROUND either HI or LO terminals. Two separate

600 ohm unbalanced loads can be driven from each output without interaction by

connecting one between HI and GND and the other between LO and GND. The

two loads thus driven will be out of phase with each other.

Maintenance Notes

IC power supply voltages are + and –16 VDC nominal. If zeners are replaced,

remove ICs and check output voltage before plugging ICs back into the circuit.

Remove power when inserting or removing or ICs.

IC output DC voltages (no signal conditions) should measure OVDC + .5 VDC.

Significant deviation indicates IC or circuit problem. Measurable DC difference

between + amplifier inputs (other than due to meter loading) indicates IC failure.

MODIFICATIONS

230 VAC Operations

Your DA is wired for 115 VAC 50/60 HZ operations unless otherwise requested

at the time of ordering. It can be modified for 230 VAC use by removing the

power transformer primary jumpers J1 and J3 and inserting a jumper in the J2

holes.

Gain

To increase gain by 10db, change R25 (R26) to 680 ohms, and increase C23

(C24) to 68 microfarads.

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