Accuphase A-60 User Manual

Attention mark indicating critical components for safety.
Replacement must be made with identical parts of special part number.
このマークのついている部品は、安全上重要な部品です。
必ず指定されている部品番号の部品を使用して下さい。
Authorized Technical Service Only
These servicing instructions are for use by qualified personnel only.
To reduce the risk of electric shock do not perform any servicing
other than that contained in the operating instructions unless you are
qualified to do so. Refer all servicing to qualified service personnel.
ここに記載したサービスに関する指示事項は、サービスに関する資格を
有する者のみが使用するものです。感電防止の観点から、サービス資格
を有していない方は、取扱指示事項以外のサービスは絶対に行わないよ
うにして下さい。
CAUTION /
回路図
Bi-lingual
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Accuphase A-60 Specifications

Power Ratings

stereo power at 1 ohm	480 watts per channel
stereo power at 2 ohms	240 watts per channel
stereo power at 4 ohms	120 watts per channel
stereo power at 8 ohms	60 watts per channel
monophonic power at 2 ohms	960 watts
monophonic power at 4 ohms	480 watts
monophonic power at 8 ohms	240 watts

Total Harmonic Distortion

stereo operation distortion at 2 ohms	0.07 %
stereo operation distortion at 4 to 16 ohms	0.05 %
monophonic operation distortion at 4 to 16 ohms	0.03 %

Frequency Response

rated output frequency response	20 - 20, 000 Hz +0, -0.2 dB
1 watt output frequency response	0.5 - 160, 000 Hz +0, -3.0 dB

Voltage Gain

max gain	28.0 dB
-3 dB gain	25 dB
-6 dB gain	22 dB
-12 dB gain	16 dB

Power Supply

AC voltage	120 V / 230 V, 50 / 60 Hz
power consumption idle	300 watts
power consumption IEC-65	550 watts

Weight and Dimensions

width	465 mm
height	238 mm
depth	545 mm
weight net	45.1 kg
weight in shipping carton	54.0 kg

Summary

Authorized Technical Service Only

CAUTION / 注意

Safety instructions for qualified personnel to reduce electric shock risk.

Safety Component Marking

Mark indicates safety-critical parts requiring identical replacement parts.

Explanation of Surface Parts

In-rush Protector Assembly

Diode (A) Assembly

Diode (B) Assembly

Input Assembly

Protection Assembly

Power Amp Assembly

Logic Assembly

Lamp Assembly

Display Assembly

LED (L) Assembly

LED (R) Assembly

Circuit Adjustment

Bias Current Adjustment for Power Amp

Adjusting bias current for left and right channels of the power amplifier.

Meter Calibration

Procedure for verifying and adjusting meter readings for output voltage.

Adjustment Mode

Entering Adjustment Mode

Function Settings Mode

Simultaneous Display Setup

Half Bias Operation

AC Line Voltage Selection

Voltage Selection Procedure

Steps for changing the AC line voltage, including wiring and component selection.

Voltage Selection Table

Table detailing voltage settings, assembly numbers, and required parts.

Service Bulletin: Voltage Decrease Countermeasure

Countermeasure Details

Details on preventing instability due to voltage decrease by changing a capacitor.

Preparation Parts

Block Diagram

Master Circuit Diagram

Input Assembly Circuit

Power Amp Assembly Circuit

Detailed circuit diagram for the power amplifier assembly.

Protection Assembly Circuit

Detailed circuit diagram for the protection assembly.

Logic Assembly Circuit

Display Assembly Circuit

Specifications

Continuous Average Output Power

Total Harmonic Distortion

Frequency Response

Input Sensitivity

Power Requirements