Accuphase AD-50 instruction manual [ja]

	AD-50

AD-50

LEFT, RIGHT

GND

S , S , S …

ON	OFF
S1 MC/MM
S SUBSONIC FILTER	S2	S3
ON/OFF
S3 MC IMPEDANCE	FILTER	IMPEDANCE
	SUBSONIC	MC
MC
3 /10 /3 Ω	S1
MC/MM
	MC/MM
	AD-50 S1 S3
S1

S MC/MM─

MM MM
								40dB
MM							kΩ
	ON 1	2	1, 2	: OFF
					MC MC
MC	ON 1	2	1, 2	: ON				66dB
							S3

S SUBSONIC FILTER─ ON/OFF

									Hz dB/
									octave
	OFF
		ON 1	2	3	4	5	6	1, 2, 3, 4, 5, 6 : OFF
	ON							1, 2, 3, 4, 5, 6 : ON
		ON 1	2	3	4	5	6

S3 MC IMPEDANCE─MC

	300Ω
		ON 1	2	3	4	1, 2, 3, 4 : OFF
	100Ω					1, 2 : ON
		ON 1	2	3	4	3, 4	: OFF
	30Ω					1, 2	: OFF
		ON 1	2	3	4	3, 4	: ON

MCΩ Ω 3 0ΩΩ Ω 0Ω

● 目安にしますが、実際に試聴して良い音質の得られ るインピーダンスを決定してください。

			E-650
1
2
	1		2

●

● ください。

	- - -
	TEL [phone]

J171.3X

820-3317-00 (B1) Printed in Japan

Analog Disc Input Board AD-50

INSTRUCTION MANUAL

Thank you for your purchase of the AD-50 Analog Disc Input Board. This optional board mounts into the rear panel of your supporting Accuphase device, allowing the unit to connect to and play from analog disc players.

Operation of this board varies according to the Accuphase device in which it is mounted. Please refer to the documentation for your Accuphase device before using this board.

Using the AD-50

LEFT and RIGHT analog player input jacks

Connects to the output cables from the analog record player.

GND terminal

Connects to the ground cable from the analog record player.

Before installing the board, set board DIP switches S1to S3 as explained below.

Note: Use a pointed object to set the DIP-switch bits, and be sure that all bits are set correctly. The board may not function properly if any of the bits are out of position.

ON	Push key down until it
	stops.

S1 : MC/MM

Equalizer gain swit

S2 : SUBSONIC FILTER

Subsonic filter ON/OFF

S3 : MC IMPEDANCE

Selects MC input impedance: 30, 100, or 300 ohms.

SI settings are meaningless if you are mounting the board into a unit that includes an MC/MM switch on its panel, as the panel setting takes precedence.

OFF	Push key up until it
	stops.

(Illustration shows side view of switch.)

		S2			S3
SUBSONIC					MC
FILTER					IMPEDANCE
S1
MC/MM

AD-50 Component Side (DIP-switch locations)

S1: MC/MM Equalizer gain switch

Illustrations show front view of switch.

MM			Factory setting
	ON 1	2	1,	2	: OFF
			1,	2	: ON
MC	ON 1	2

MM: Moving-magnet cartridge (high output voltage) Gain: 40 dB

Input Impedance : 47 kilohms

MC: Moving-coil cartridge (low output voltage) Gain : 66 dB

Input Impedance : As set by S3.

S2: SUBSONIC FILTER Subsonic filter ON/OFF

Illustrations show front view of switch.

	OFF							Factory setting
		ON 1	2	3	4	5	6	1, 2, 3, 4, 5, 6	: OFF
								1, 2, 3, 4, 5, 6	: ON
	ON	ON 1	2	3	4	5	6

This is a low-cut filter with a cutoff frequency of 25 Hz and a steep attenuation curve (-12 dB/octave). Its purpose is to filter out very low frequency noise that might otherwise adversely affect audible ranges. It is very effective for removing rumble noise from warped records and for preventing woofers from bottoming out.

S3: MC IMPEDANCE Selects the MC input impedance.

Illustrations show front view of switch.

	300Ω					Factory setting
		ON 1	2	3	4	1, 2, 3, 4 : OFF
	100Ω					1, 2 : ON
		ON 1	2	3	4	3, 4	: OFF
	30Ω					1, 2	: OFF
		ON 1	2	3	4	3, 4	: ON

In general, you should set this according to the MC cartridge’s rated internal impedance, as follows.

20 ohms or higher: Set to 100 or 300 ohms. Below 20 ohms: Set to 30 or 100 ohms.

●As a guideline, the impedance setting should be about 2 to 3 times the cartridge’s internal impedance. But you should test the setting by ear, and feel free to change it to get the best sound.

	How to install		Illustration shows installation on the E-650.
Turn off the device power.		Guide rail
On the rear panel, remove the sub panel of the slot you
wish to use. (See Fig. 1. )
Retain the sub panel for future use.
Insert the option board into the slot, along the slot’s
upper and lower guide rails (see Fig. 2. ). When the rear			Subpanel
of the board reaches the internal connectors, give a				Option
gentle push to snap the connection into place, so that				board
the front of the board becomes flush with the panel.
Secure the board by screwing in the top and bottom		Guide rail
screws.	while power is on may damage the equipment.	Fig. 1.		Fig. 2.
Caution
	● Turn off the device power before installing or removing option boards. Installing a board

●Keep fingers out of the opened slot. Do not place anything other than the board into the slot.

●Avoid touching the board’s soldered areas, connector contacts, and components. Touching these areas may damage the circuitry or the contact. Hold the board by the edges or along its panel.

●Tightly screw in the two screws all the way (by hand). If screws are loose, terminals may separate from ground, resulting in poor contact or equipment damage.

●Do not use electrical contact enhancers or conductivity agents on input jacks and connectors, as these may cause aging in resin parts and lead to damage.

ACCUPHASE LABORATORY, INC.

YOKOHAMA, JAPAN

J171.3X

820-3317-00 (B1) Printed in Japan