Option Boards / Optional Cables; Connection Cables - Accuphase E-350 Instruction Manual

Option Boards
Three types of option boards can be used in the E-350: the Digital Input Board DAC-20, Analog Disc Input Board AD-20, and Line Input Board LINE-10. These boards
can be installed in the two rear-panel slots (OPTION 1 or 2), as required.
● Always turn the power of the E-350 off before inserting or removing any option board.
● Any board can be installed in any of the two slots.
● The Analog Disc Input Board AD-9/AD-10 and the Line Input Board LINE-9 can also be used.
Using Option Boards
Playback of CD or similar with digital input
Install the Digital Input Board DAC-20.
✽ The board can handle digital output signals from a CD player, MD recorder
or other digital component with a sampling frequency of up to 96 kHz. The
connection can be made with coaxial or optical fi ber cable.

Connection cables

COAXIAL: Use a digital coaxial cable with RCA plugs.
OPTICAL: This is a connector for JEITA standard optical fi ber cable.
Optical fi ber cable
If connector has a
connection
blind plug
Remove protective cover
Optical connector
from connector tip
If connector has a shutter
Plug
Push inwards to
Optical fi ber
open shutter
cable
Analog disc (AD) playback
Install the Analog Disc Input Board AD-20.
[When using the AD-10: The setting content is the same, but because the number
and position of DIP switches and the setting procedure are different, be sure to
consult the AD-10 documentation.]
Note:
Always turn the power of the E-350 off before inserting or removing any
option board.
Before inserting the board, the DIP switches (S1 - S3) on the board must
be set to the required positions.
Note: Use a sharp pointed object to move the switch levers and make sure
that the levers are set fully to one side. If a lever is set only half-way,
correct operation will be not be achieved.
A S1: MC LOAD
MC input impedance selector: 10/30/100 ohms
B S2, S3: FILTER
Subsonic fi lter on/off
C S4: MC/MM selection
Memo
In the E-350, the MC/MM button on the front panel has priority. Therefore
there is no need to set the S4 switch on the board.
AD-20 component side (location of switches S1 - S4)
10
Plug
Pull out blind plug
Align plug guide with
connector and insert
Plug
Playback
A Verify that the VOLUME control is turned fully down and then turn on the
E-350 and the other components. Set the INPUT SELECTOR to the position
for the option board slot in which the DAC-20 is installed (OPTION 1 or 2).
B Set the source component to the play condition and adjust the volume to a
suitable level.
Note:
● Do not connect both the COAXIAL output and the analog outputs (balanced/
unbalanced) of a component to the E-350 at the same time. Otherwise
ground loops may occur which can cause noise.
● When equipment is connected to both the COAXIAL and the OPTICAL
input (of the DAC-20), only one of the signals will be selected. To control
the selection, disconnect the cable for the component that is currently not
playing, or turn power of that component off.
A S1: MC LOAD – MC input impedance selector (Set on board)
As a general guideline, set this switch according to the
rated internal impedance of the MC cartridge.
Factory default
setting
20 ohms or more:
Less than 20 ohms:
● Generally, the input impedance setting should be
about 2 to 3 times the rated cartridge impedance.
However, since the requirements of some cartridges
may vary, the fi nal setting should be determined by
ear.
● This switch affects both the left and right channels.
B S2, S3: FILTER – Subsonic fi lter on/off (Set on board)
This fi lter has a cut-off frequency of 25 Hz and a steep
attenuation slope of –12 dB/octave. It cuts off unwanted
Factory default
setting subsonic signal components without affecting the audible
range. Removing subsonic noise components is useful
for example to stop excessive woofer excursions caused
by record warps or turntable rumble, etc.
● Be sure to set both switches to the same position.
C S4: MC/MM – Equalizer gain selection (Setting of MC/MM button
MM: For moving magnet cartridges with high
Factory default
setting
MC: For moving coil cartridges with low output
● This switch affects both the left and right channels.
Memo
When installed in the E-350, the DIP switch S4 on the AD-20 board need
not be set.
100 ohm position
30 ohm or 10 ohm position
5 on panel has priority)
output
Gain: 36 dB
Input impedance: 47 kilohms
Gain: 62 dB
Input impedance: As selected with S1