McIntosh MA 230 - SERVICS BULLETINS, Руководство пользователя

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gram source should be twisted together and
the ground wire from each source can be
wound or twisted in with these cables. To
avoid hum, make sure the ground wire does
not make any connections to shields of the
left and right channel cables except for the
connection provided with the MA230 ground
post.
TAPE OUTPUT CONNECTIONS
The TAPE OUTPUTS on the back panel
provide the program material with sufficient
level for feeding a tape deck or recorder. The
TAPE OUTPUT signal is not affected by
these front panel controls: VOLUME, BASS,
TREBLE, BALANCE, LOUDNESS, PHASE,
TAPE, MODE SELECTOR, SPEAKER, LF and
HF FILTERS. The INPUT SELECTOR and the
COMP switch (in Phono 1 and Phono 2) affect
the TAPE OUTPUTS. All recording volume
adjustments are made at the tape recorder.
The room listening volume of the MA230 can
then be set at any desired level without
affecting recording volume.
LEFT and RIGHT SPEAKER OUTPUT
Speaker systems of 4, 8, or 16 ohms im-
pedance connect to the SPEAKER terminals
on the back panel of the MA230.
Select the output impedance desired by
placing the wire pigtail with the lug under the
appropriate impedance screw on each chan-
nel. Tighten the screws firmly. Connect the
left speaker leads to the two screws under
the lettering marked LEFT SPEAKER. Con-
nect the right speaker leads to the two screws
under the lettering marked RIGHT SPEAKER.
The common or chassis ground tap on each
channel is marked C. Connect each speaker
in an identical manner.
AC POWER
Plug the AC power cord into a 120-125
volt, 50 or 60 cycle power line.
INPUT CONNECTIONS
The MA230 provides seven separate pro-
gram inputs controlled by the INPUT SELEC-
TOR switch. The input for tape monitor is
controlled by the TAPE switch.
12
CONNECTION
TAPE MONITOR
AUX
TAPE
TUNER
CONNECTION
PHONO 1 & 2
TAPE HEAD
FUNCTION
The tape monitor input accepts a signal from a tape
recorder with a monitor head and preamplifier
The auxiliary input accepts any auxiliary service requir-
ing flat frequency response, such as a T.V. set, tuner,
tape recorder with its own playback preamplifier, etc.
The tape input operates with tape machines containing
their own playback preamplifier
The tuner inputs accept AM and FM outputs from a
stereo tuner or a pair of stereo tuners or the multiplex
output of an adapter of multiplex tuner
FUNCTION
These jacks are to be used with magnetic cartridges,..
These jacks are to be used with a tape deck that does
not contain its own playback preamplifier
INPUT
SENSITIVITY
0.25 V
0.25 V
0.25 V
0.25 V
INPUT
SENSITIVITY
1.5 MV
1.5 MV
INPUT
IMPEDANCE
250K
250K
250K
250K
INPUT
IMPEDANCE
47K
1 megohm