Mitsubishi DA-C20 User manual

PRECAUTIONS
1. GENERAL
BE SURE TO USE YOUR A.C. POWER SOURCE
Your A.C. power is marked nn the side panel of this
unit. Connection to any other power source may
cause damage to this unit and/or severe electrical
shock.
DO NOT PLUG IN OR UNPLUG THE POWEB
CORD WITH WET HANDS
There is a great danger of severe electrical shock if
the power cord is plugged in or unplugged with wet
hands. Do not attempt to unplug the cord from an
A.C. outlet by pulling the cord. Firmly grasp the
plug to remove it f rom the A.C. outlet.
DO NOT ALLOW WATER OR ANY FOREIGN
MATTER TO GET INSIDE THIS UNIT
Should water or a metallic object accidentally fall
into this unit, immediately disconnect the power
cord and consult your authorized service dealer.
HANDLE THE POWER CORD WITH CABE
Do not bend sharply or twist the power cord. lf
the insulation becomes damaged, the conductor
breaks, or poor contacts occur, request service from
your authorized service dealer. Continued use under
these conditions, may cause f ire or electrical shock.
DO NOT TOUCH THE INSIDE OF THIS UNIT
There are high voltages inside this unit. Never re-
move the top or bottom cover. All inspections and
repair including fuse replacement, should be carried
out by your authorized service dealer.
DISCONNECT THE POWER CORD AT THE
FIRST SIGN OF TROUBLE
At the first sign of unusual noise, odor, or mal-
function, disconnect the power cord and consult
your authorized service dealer. Continued use under
these conditions, may increase damage or cause
additional problems.
2. LOCATION
AVOID PLACEMENT IN DIRECT SUNLIGHT,
NEAR AIR CONDITIONER ETC.
This unit can become unstable if operated in ex-
tremely high or low temperatures. Place lt in a well
ventilated area for proper heat dissipation. Avoid
placement in direct sunlight, near air conditioners,
poorly ventilated areas or in areas of excess humidi-
ty or dust. Do not block the ventilatlon holes.
3. CONNECTTONS
BE SURE TO TURN OFF THE POWER BEFORE
MAKING CONNECTIONS
This is to prevent damage to the speakers from the
popping noise which occurs when plugging and
unplugging cords.
USE EXTREME CARE IN MAKING THE
CORRECT CONNECTIONS
lf you reverse the R (right) and L (left) leads, you
will reverse the stereo location of R and L channels.
MAKE CONN ECTIONS SECUR ELY
lf any of the plugs should become loose or
connected, a hum may develop. lf this is
corrected, deterioration of sound quality
possible damage to the speakers may result.
USE ONLY SHIELDED CORD FOR THE LEADS
Use only shielded cords for interconnecting com-
ponents. Do not use cords longer than 2m (6'). Ex-
cessive lead lengths can deteriorate high frequency
response and are subject to interference that can
result in hum or noise.
WHEN NOT USING THE PHONO INPUTS, KEEP
THE SHORTING PLUGS INSERTED IN THE
INPUTS
This is to prevent hum and noise and to prevent the
popping noise which can occur when switching the
proqram selector switch without a turntable
connected.
WHEN USING THE COMPANION POWEB
AMPLIFIER (DA-A1ODC, DA.A1sDC) AND
SWITCHING TWO PAIRS OF SPEAKERS FROM
THIS UNIT, ENSURE THAT THE COMBINED
IMPEDANCE (BOTH PAIRS OF SPEAKERS
OPERATING) IS 4 OHMS OR ABOVE
lf the combined impedance is below 4 ohms, the
load impedance detector circuit may operate and
mute the power amplif ier output.
d is-
not
and
The combined impedance is determined with the
following formula.
COMBI NED IMPEDANCE = ffi IO"'I
u87t 8004H6B

FRONT PAI{EL TERMNOLOGY AI{D FI'NCTIONS
's'#+= 4 (ohms)
Nominal impedance of speaker A
Nominal impedance of speaker B
Please consult your audio dealer for additional
information.
4. OPERATIONS
BEFORE PLACING THE POWER SWITCH IN THE
ON OR OFF POSITION OR OPERATING
SWITCHES, ALWAYS TURN THE PREAMPLI-
FIER'S VOLUME (ATTENUATOB) CONTROL
ALL THE WAY DOWN
This is to protect the speakers from the damage,
that can occur if the volume level is set high and the
power is turned on.
THERE WILL BE NO SOUND FOR A FEW
SECONDS AFTER YOU TURN ON THE POWER.
THIS IS NOT A MALFUNCTION.
This unit is equipped with a power supply muting
circuit which prevents popping noise when the
power switch is turned onior off .
5. CARE
Wipe the cabinet with a soft cloth when it becomes
dusty. lf it should get really dlrty, dampen a soft
cloth in a weak solution of mild soap and water,
wring it out dry and wipe off. When finished, dry
completely with a soft dry cloth. Any volatile
materials such as alcohol, thinner, benzine, insecti-
cides, etc, may remove the paint or damage the
luster and should not be used.
UB71 BOO4H6B
1. SIGNAL (Signal Strength Meter)
This meter shows the signal strength level of AM
and FM broadcasts. For AM broadcasts, the best
position for reception ls obtained when the needle
of this meter reaches its maximum deflection to
the right. For FM broadcasts, the best position for
reception is obtained when the needle of this meter
reaches its maximum deflection to the riqht and the
needle of the TUN ING meter is centered.
2. TUNING (FM Genter Channel Tuning Meter)
This meter shows the most distortion-free position
for receiving the FM signal. When locating FM
broadcasts, first tune in the station with the
SIGNAL meter. Then use this meter for fine tuning
adjustments. When no FM signal ls being received,
the needle of this meter is in the center, As a
station is tuned in, the needle will move either to
the right or the left and then back'to the center
when the signal is tuned to its best position.
This meter does not function {or AM stations.
23
mm
15 ',14 13 12 11 10

3. lF BAND (Selectivity Switchl
This selectivity switch is for choosing the lF band-
width and may be swilched between the WIDE
(with 45 dB selectivity) and the NARROW (with 7b
dB selectivity) for reception.
WIDE For receiving an FM broadcast when
there is no interference from nearby
stalions. In this position, the lowest
distortion recept ion is obtained.
NABROW For receiving an F[,4 broadcast in a
crowded broadcast area to eliminate
interference f rom nearby stations.
4. MUTING/MODE (Muting Mode Selection
switch)
This switch is for selecting the mode of Fl\l re-
ception you desire.
ON/AUTO For receiving a FIVI stereo broadcast.
ln this position, the interstation noise is
eliminated while tuning.
OFF/MONO For receiving a monaural Fll broad-
cast. ln this position, the interstation
noise is not ellminated while tuning,
enabling weaker FlVl broadcasts to be
tuned in. Stereo broadcasts are also
received monaurally.
5. EAND SELECTOB (Band Setection Swirch)
This switch is for selecting FM or AM band re-
ception.
FM For receiving Fi\.4 broadcasts
AM For receiving Al\,,1 broadcasts
6, DIAL SCALE
This scale indicates FM or AM frequencies.
7. DIAL MARKER
This marker indicates receiving FM or AM fre-
quency.
8. STEREO (Stereo lndicatorl
This indicator lights up when a FM stereo broadcast
is being received. lf the MUTTNG/|V]ODE swjtch is
in the OFF/N4ONO position, this indjcator will not
light up even when a stereo station is tuned in.
9. TUNING (Tuning Control)
This control is for selecting the desired station on
AlVl or F[,4 bands. Tune in the desired station by
observing the position of SIGNAL meter and
TUN ING meter while rotating this control.
10, DUPLICATE (Duplicate Switches)
This switch is used for duplicating from tape to
tape. While duplicating, normal lisrening to the
program source set by the program SELECTOR
switch is possible since the duplicate function
operates independently.
11. TAPE MONITOR (Tape Monitor Switches)
This switch is used for monitoring either the pro-
gram source being recorded or the playback from a
tape deck. For more details, see page '13.
TAPE 1 For playing or record monitoring of
the lape deck connected to PLAY l
inputs.
SOURCE For reproducing program sources set by
the program SELECTOR switch.
TAPE 2 For playing or record monitoring of
the tape deck connected to PLAY 2
inputs.
12. MODE {Mode Switch}
This switch selects stereo or monaural.
STEREO The normal play position. Sounds on
the left channel are reproduced through
the left speaker, and sounds on the right
channel are reproduced on the right
speaker.
MONO Program material from both right and
left channels is combined and re,
produced through both speakers.
1*2 For duplicating from the rape deck 13. SUBSONIC FILTER (Subsonic Filter Switch)
connected to PLAY 1 inputs to the This filter attenuates the frequencies below'18 Hz
tape deck connected to REC 2 outputs. on the right and left channels at a 6 dB/oct rate.
SOURCE ln this position, you can record the The subsonic filter is used to remove unwanted low
program source set by the program frequency noise, and to prevent acoustic feedback.
SELECTOR switch with the tape decks
connected to the REC 1 and REC 2
outPUts.
For duplicating from the tape deck
connected to PLAY 2 inputs to the
tape deck connected to BEC 1 outputs.
2*1

14. SELECTOR (lnput Selection Switch)
This switch selects the desired program source.
PHONO lVlC This position is used for playing a
disc on the turntable equipped with a
MC (moving coil) cartridge and con-
nected to the PHONO MC inputs.
PHONO MM This position is used for playing a disc
on the turntable equipped with a l\,4M
(moving magnet) cartridge and con-
nected to the PHONO MM inputs.
TUNER For listening to programs on the AN,4/
FN,4 tuner.
AUX for playing a second tuner tur,lrable
with a high output ceramic cartridge,
tape deck for playback use, television
audio, or any suitable high output
sources connected to the AUX inputs.
15. ATTENUATOR (Volume Control)
This control adjusts the sound volume from the
speakers and the headphones. The volume is in-
creased by rotating clockwise, and decreased by
rotati ng countercl ockwise.
16. TREBLE (R & L) (Treble Controls)
These controls vary the sound level of the high
frequency range on the right and left channels.
lVoving clockwise from "0" increases treble, while
movinq counterclockwise from "0" attenuates
treble. Each step of these controls precisely adjusts
the treble at 2dB. Select the best positions to suit
the characteristics of your speakers and listening
room, or personal preference. At the "0" position, a
flat frequency respolse is obtained.
17. BASS (R & L) (Bass Controls)
These controls vary the sound level of the low
frequency range on the right and left channels.
l\loving clockwise from "0" increases bass while
moving counterclockwise from "0" attenuates
bass. Each step of these controls precisely adjusts
the bass at 2dB. Select the best positions to suit
the characteristics of your speakers and listening
room, or personal preference. At the "0" position,
a flat frequency response is obtained.
18. TONE (R & L) (Tone Defeat Switches)
This switch is used for cancelling the TREBLE and
BASS controls on the rioht and left channels.
Both TREBLE and BASS controls can
be adjusted.
ln this position, TREBLE and BASS
controls are removed from the siqnal
path and a flat trequency response is
obtained.
21. POWER (Power Srvitch)
This switch is for turning this unit on and off. When
in the ON position, the faces (SlcNAL, TUNING,
dial scale) are iiluminated.
22. SPEAKERS/OUTPUT (Speaker Selection
Switches)
When using the companion power amplifier (DA,
A'ioDC. DA'A1sDC), the speakers connected to the
power amplifier may be controlled with these
switches. The "speaker control cable" supplied with
the power amplifier must be connected, to utilize
these switches.
AB
t r For listening with headphones. Preamp"
lifier outputs are off and no sound will be
produced from the speakers.
^ I For listening to the speakers connected to
the A terminals on the power amplifier.
L r For listening to the ipeakers connected to
the B terminals on the power amplifier.
.- ^ For listening to the speakers connected to
both A and B terminals on the power am-
plifier.
23. LOCK (Lock lndicator)
This indicator lights up when a FlVl broadcast is
being received and tune in to the center of the
TUNING meter. This indicator does not work for
AN4 reception.
ON
D EFEAT
19. OUTPUT LEVEL (R & L) (Output Levet
Controls)
Moving these controls counterclockwise from their
"0" position reduces the volume of the right and
left channels. They are normally kept in the ,,0"
position or may be adjusted to any level in between.
20. PHONES (Headphone Ourputl
For stereo listening with headphones. plug the
headphgnes into this output. Listening by head-
phones is possible at all positions of theSPEAKEBS/
OUTPUT switches-

J
SIDE A\ID REAN PAI.IELS TERMINOGY AND CONNECNOI\IS
A.C. POWER CORD
This cord is pluqged into
the AC. wall outlet.
When using this unit with i1s companion power
amplifier (DA-AI0DC, DA-A]sDC). make the con-
nection between them as shown in the diagram.
For more details, see the instruction book of your
power amplifier.
Turntable
with MM cartridge Turntable
with MC cartridge
DA A1ODC
DA.AI5DC -{@
-y*EW

FM ANTENNA (3oOohms) FM ANTENNA {3ooohms) AM ANTENNA ,. ---.]l-Aoorox.12m (ru,l I l
E
o
o
l
Flvl Antenna
Suppli€d
with Tun6r
FM ANTENNA (7sohms)
cround Surface
At Least 1m (3.3')o^ I o o
I o " ifl. o copp€r Plare or
- 1'"f-o; au;do; B;J
cr,ur"oat pi"""s- "oE Bj

PHONO MC (Phono lnputs for MC Cartridge)
The input impedance of phono MC is '10 ohms. The
output leads from the turntable equipped with a
MC cartridge are connected here.
PHONO MM (Phono lnputs fol MM Cartlidge)
The input impedance of phono l\.41\,4 is 50k ohms.
The output leads from the truntable equipped with.
a l\y']\y' cartridge are connected here.
AUX (Auxiliary lnputs)
These lnputs may be used for a television audio or
any suitable high output sources.
PLAY 1, PLAY 2 (Tape Playback lnputs)
These inputs are for tape playback. Connect the
tape deck outputs here.
REC 1, REC 2 (Recording Tape Ourpurs)
These outputs are for use when recording on tape.
Connect the tape deck inputs here.
GND (Glound Terminal)
Sometimes, hum or other noise may develop when a
turntable is connected to this unit. ln such a case,
connect the ground wire of a turntable to this ter-
m ina l.
OUTPUT (Preamplif ier Outputs)
The preampliJier outputs are connected to the in-
puts of the power amplifier.
AM BAB ANTENNA
This is the antenna for receiving Al\l brradcasts.
This antenna is directional. lt should be put in the
posirion wh'ch brinqs the besr recept:on.
ANTENNA (Antenna Terminals)
These terminals are used for connecting an Fl\,4
antenna. For more details, page9and'10.
FM 75Q (75 ohms Antenna Terminals with
Holder)
For connecting 75 ohms coaxial cable.
FM 3O0O (Fl\4 300 ohms Antenna Terminals)
For connecting 300 ohms flat twin lead.
GND (Ground Terminall
For connecting ground wire when using an out-
door AN/l receiving antenna. A good earth
ground can be obtained bv burying a copper
plate or rod and connecting,all ground wiresto
it. Caution-Never connect the ground wires
to water or gas pipes.
AM (AM External Antenna Terminal)
For connecting an external AM antenna. When
using this unit in an area of poor AM reception,
connect an outdoor AN/ receiving antenna to
this terminal
MULTIPATH (Multipath Detector outputs)
These outputs are for detecting multipath dis-
turbance. For more details, see "FM MULTI-
PATH ADJUSTIVIENT" section on page11.
FM DET OUT (FM Detector Outputs)
These outputs are for connection to an Fl\,4 4
channel decorder when receiving FM 4 channel
broadcasts.
SwITCHED (A.c. Outle$)
A.C. power is available from these outlets when the
POWER switch is on. These may be used for power
amplifier, etc. The total output power must not
exceed 500w.
UNsWITcHED (A.C. Outlets)
A.C. power is available from these outlets whether
the POWEB switch is on or off. These may be used
for turntable, etc. The total output power must not
exceed 400W.
SPEAKERS CONTROL (Speaker Control Output
Terminal)
When using a companion power amplifier IDA-A10
DC, DA-A]sDC).this terminal is connected to the
"remote" terminal on the power amplifier by means
of the "speaker control cable" supplied with the
power amplifier. This allows control of the speakers
frorn the front panel of this unit.

INFORMANON ON ANTENNA
1, FM ANTENNA
For excellent reproduction of FM broadcasts, a
proper FIVI antenna is a necessity.
CHOOSE THE PROPER ANTENNA FORYOUR
AREA
O AREAS WHEBE THE STATIONS ARE
CLOSE AND THE SIGNALS ARE STRONG
The use of an outdoor Fl\,4 antenna is recom-
mended but the T shaped antenna provided
with this unit can also be used. When using
the T shaped antenna, connect it 10 the FM
300ft terminals. While listening to an Fl\,4
station, attach the antenna to the ceiling or
wall. The strength of the signal will change
with the direction of the horizontal part of
the antenna. (The top of the "T"). Orient it in
the direction that brings the strongest and
best reception.
AFEAS WHEBE SIGNALS ARE WEAK
BECAUSE OF LONG DISTANCE FROM FM
STATIONS OR WHERE BUILDING CON'
STRUCTION BLOCKS THE SIGNALS
Use an outdoor Fl\l antenna of from 3 to I
elements located in the highest possible place.
Usually 300 ohms flat twin lead is used be-
tween the antenna and the tuner. lt should be
connected to the F[/300O terminals.
AREAS WITH INTERFERENCE OR NOISE
lf you live in the city where there is a lot of
automobile traffic, near industrial plants. or
near hiqh voltage lines, you may encounter
noise even if you install an outdoor FIV
antenna. ln such areas it is necessary to
connect the antenna to the tuner with 75
ohms coaxial cable. When using 75 ohms
coaxial cable, connect it to the FM75S, ter-
m inals.
HOW TO ATTACH COAXIAL CABLE
Use a coaxial cable cutter or some other suitable
instrument such as a wire cutter, etc.
(D Cut back the outer insulation of the cable to a
distance of 15mm (5/8")
Coaxial Cable
O Peel the braided shield wire back over the
outer insulation of the cable.
O Cut the insulation from the inner conductor
to a distance of 1Omm (3/8").
lnsert the end of the coaxlal cable into the
holder of the Fl\,475Q terminals and fasten
the inner conductor down. Ihen tighten the
holder, over the braided portion 9f thecable.
Functions as a ground
o
Shield Wire
lnsulation

10
HOW TO POSITION THE FM ANTENNA
a Locate the antenna where the broadcasting
station's signals can be received dlrectly with-
out obstruction, such as buildings, etc. ln
places where the radio signal cannot be re-
ceived directly. as in between tall buildings.
find the optimum location for the antenna by
rotating to the position of least noise and
distortion while listening to the signal.
. To avoid automobile ignjtion noise, place the
antenna as far from roads as possible.
o As a rule, the higher the antenna, the better
the reception. but in certain places medium
height is best.
. FM antennas have a characteristic called
"directivity" which means that they receive
signals best from a certain direction. Be sure
to orient the antenna so that it is pointing
toward the transmitting antenna of the
broadcasting station.
a Position your FlVl antenna in the direction
which will minimize multipath interference.
For more details, sea "Flvl l\IULTIpATH
ADJUSTMENT" section on page 1 l.
ATTENUATION
lf you experience audible distortion, or if you are
unable to get adequate station separation during
FlVl reception, this indicates that signals mav be too
strong. By using an attenuator, this problem can be
overcome. Please consult your authorized audio
dealer for additional information.
2. AM ANTENNA
FERRITE BAR ANTENNA
The built in ferrite bar AlVl antenna is highly
sensitive and an outdoor antenna should not be
necessary. Bend it out away from the rear Danel
and orient iI 10 the position where reception is best.
Be careful not to place the A.C. power cord or
other wires too close to the antenna since this may
cause unwanted noise.
How to use AM Bar Antenna
Move the bar horizontally and:et it at the place
betwoen poants A and B where reception is best.
EXTERNAL ANTENNA
ln areas where stations are especially weak, connect
an external anlenna (the standard is jm 124,'! hish
and 12m [40'] long] to the AM terminal.
3. GROUND
You can receive broadcasts without a ground wire,
however, we recommend the use of a good oround
for the elimination of noise and for safer operation.
CAUTION: Never connect the ground wire to a,gas
or Water pipe,
Positioning of FM Antenna
=\-
-\\\\\
.--\\'
_\\"

11
FI\d MI.]LTIPAITI ADJIJSTMENT
F[,4 radio signals behave somewhat like light waves,
and when there are buildings or other objects near
the receiver antenna, the signals are reflected as
shown in the diagram. When these reflect:d signals
enter the antenna at the same time as the direct
signals, the two interfere with each other and pro-
duce distortion in the receiver. This is termed
"multipath distortion". The result of multipath is
distortion in the sound and poor stereo separation.
To prevent such multipath interference, use the
most directional antenna you can obtain (one with
the most elements) and point it either directly at
the station's broadcasting antenna or in a direction
where no multipath effects are noticed. To deter-
mine the direction of least multipath interference,
this unit is equipped with a set of special outputs.
Adjust your antenna position by the following
method.
DIRECT WAVE AND
R EFLECTED WAVE
1. ADJUSTMENT WITHOUT AN
osctLLoscoPE
O lMake the connections shown in the diagram
and turn the SELECTOR switch to the
AUX position.
O Tune in a stereo broadcast. The sound coming
from the L channel speaker will be free of
distortion, while significant distonion is heard
from the B channel speaker.
O Adjust the OUTPUT LEVEL controls so that
sound is heard only from R channel speaker'
O Rotate the antenna until the volume of the B
channel speaker is lowest. At this point, multi-
path distortion will be minimized and the
antenna should be permanently iixed in this
position.
2. ADJUSTMENT WITH AN
oscrLLoscoPE
Connect an oscilloscope to the [/]ULTIPATH out-
puts as shown in the diagram. Use an oscilloscope
with a vertical deflection sensitivity of more than
lOmv/cm and a horizontal deflection sensitivity of
more than 50mV/cm. Tune in an Fl\,4 station and
adjust the oscilloscopd so that the wave pattern is
easy to see. Adjust your antenna so that the multi-
path interference is minimized as shown in the right
hand square in the diagram.
MULTIPATH outputs
on rear panel
(Shielded wire)
ffil
Lffi]I
Much Multipath
lnterference
tml
[ffi]r
Little Multipath
lnterference

12
OPERANONS
BEFORE OPERATING
Check the lollowing ilems before placing the pOW-
ER switch in the ON position
. All other componehts are properly connected.
. The SPEAKEBS/OUTPUT switches shoutd be in
the on (A, B or both) position. (When using a
companion power amp lif ier).
.The TAPE MONtTORand DUpLICATE switches
are in the SOURCE position.
*The BASS and TREBLE controls are in the ,.O,,
position.
. The OUTPUT LEVE L controls are in the ,,O,,
Position.
.The ATTENUATOB controt should be turned
fully counterclockwise.
Then place -the POWEB switch in the ON position.
NOTE: lf the ATTENUATOR control is in any
other position, the speakers may be
damaged when the POWEB switch is
moved to the ON position.
1, PLAYING DISCS
(D When playing a disc on a turntable connected to
PHONO l\,,lM {or PHONO l\.4C) inputs, rotate the
SELECTOR switch to PHONO MN.4 (or pHONo
MC).
2. LISTENING TO BROADCASTS
O Rotate rhe SELECTOB switch to the TUNEB
position.
SQECTOR
.^"70\*
tlt*
\\ //
O Operate the turntable.
O Select the desired volume with the ATTEN,
UATOB control.
NOTE: When using a high output power ampli-
fier, it is possjble to damaqe the speak-
ers with excessive volume levels. Be
extremely careful not to apply too
much input to the speakers when using
speakers with a maximum input rating
less than the amplifier's rated power
output.
@ For FM receprion, place the BAND SELECTOR
switch in the FIV position and MUTING/l\IODE
switch in the ON/AUTO position. For AlVl re,
ception, place the BAND SELECTOR switch in
the AlVl position.
@Tune in the desired station by
SIGNAL and TUNING rneters
TUN ING control
(, Select the desirecl volume with
ATOR control.
NOTE: If you experience excessive noise when
listening to a weak FM station, turn
the l\ilUT ING/t\,4ODE switch to the
OFF/IVONO position. The broadcast
will not be in stereo but the noise will
decrease. This measure should only be
necessary to reduce noise when listen-
ing to a very weak stereo broadcast.
observing the
while rotating
the ATTENU-

13
3. TAPE DECK RECORDING AND PLAY-
BACK
. RECORDING
O Rotate the SELECTOR switch to the program
source you wish to record.
. PLAYBACK
O Place the TAPE IVIONITOR switch in the TAPE 'l
(or TAPE 2) positiop according to the tape deck
you wish to commence playback.
4. PLAYING FROM OTHER SOURCES
O Rotate the SELECTOR switch to the AUX
position.
e Operate the tape deck in recording mode.
O Play the source to be recorded.
O By placing the TAPE IVIONITOR switch in the
SOURCE position, you can simultaneously
record while listening to the original program
source through the speakers. lf your tape deck is
of the three head variety (having independent
erase, playback and record heads), you can
monitor the recording being made by placing the
TAPE MON ITOR switch in the TAPE 1 (or
TAPE 2) position.
O Adjust the recording level with the "input" con-
trols on the tape deck.
NOTE: The ATTENU,ATOR, TREBLE and
BASS and other front panel controls
and s,witches have no effect on the re-
cording.
O Operate the tape deck in playback mode.
O Select the desired volume with the ATTEN-
UATOR control.
. DUPLICATING
O Place the DUP LICATE switch in the 1 , 2
(or 2.1) position.
O Operate the unit
sources).
O Select the desired
UATOR control.
(television audio, or other
volume with the ATTEN'
5. LISTENING WITH HEADPHONES
O Plug the headphones into the PHONES output.
O Select the desired volume with the ATTEN-
UATOR control.
NOTE: Use only low impedance headphones,
e.g. 8-16 ohms. lf high impedance head-
phones are used, sound volume may be
decreased.
@Operate one tape deck, in playback mode, con-
nected to PLAY 1 (or PLAY 2) inputs and an-
other tape deck, in recording mode, connected
to REC 2 (or REC 1) outputs.
sELICTOR
"-o=

14
BEFORE TAKING YOTIR TI]NER.PREAMPLIFIER IN FOR SERVICING....
Finit check to €nsure that allother componentsare proporly connected to this unlt and are operating normally, Then.heck the fottowing irems,
SYMPTOM CAUSE REMEDY
o Power does not come on when the POWEB switch oPower cord nol complerely plugoed in, o P ug in comp ete y.
oConsult vour authorized se ice deaier
oSELECTOB, TAPE MONITOF or SPEAKEBS/OUTPUT
witchesare in the wrong position,
oNominal speaker impedance is less rhan 4 ohms and protstion
cir.uit on the power amplifier is operating,
oSpeaker leads or plug oot comple.tely plloqed in.
ospeaker {+) and ( ) leadsarerouchins.
oLelt and riqht channels arc olt of balance,
OPLa.e swltches in the proper posirion.
otlse speakers with nominal impedance of 4 ohrns or above.
oAdiust OUTPUT LEVEL conrroh
oTurntable sround wire not attached.
oTurntable outpur cod tooclose to power cod,
oPluos not complelely pluqged in.
oantenna not connected properly or not ser in the proper diroction.
oConnect ground wire to the GND termjnal.
oConnect the antenna properly or set in the proper direction.
Continuous hisinq in between statjons. (FM)
More noise on sterco tban monaural. (Ftul
High frequency whistling solnd {louder at
niaht) (aM)
lnierference caused by amateur radio siqnals.
Oifficulty in listening to the station b&ause it
is weak and covered by noise.
c)
d)
s)
h)
oNoise from electrical appliances (ftourescent tights. TV, motors,
o UnfavoEble listening location or probtem at the radio station,
oAuro isnition noise
oNormal noise on the FM band
oThis is due to the f6cr ihat ir requires more siqnatstrength to
secure better srereo broadcast than monaural_
oNoise from electrical appliance (fluorescenr tishts, TV, morors,
oNoise from TV or a beat sound caused by jnterference of other
radio nations.
olnterference noise by high or low harmonics from amateur radio
@,io'"rion,lE
being transmitred to the turntijble.
oBemove as faras possible from the noie source or
eliminate the appliances,
oDiflicult to correct.
1. Change antenna direction.
2. Move ourdoorantenna as fars posibte from the
3. Substitule co6xial.able for3O0 ohms flat twin led. {FtV)
4, Oifficult to corecl withour eliminatino sourceof noise.
oT!rn the tvlUTlNG/MODE swirch to ON/AUTO, and
this noise should not be heard.
ol. Turn the MUTING/MOOE switch to the OFF/MONo
2. Installoutdoor FM antenna.
o1. lnstalloutdoor antenna and attach a qood ground.
2. Difficulr to correct without eliminating the sour.e of
2. Difficutt ro comptetetv do awav with becalse irt a
problem with the AM from oi broadcasting.
oDis.uss with the amateur radio operators.oncerned.
o(F[,4) Install outdoor F\4 antenna.
(AM) 1 . Chanse the orientation of the bar antenna.
2, Put up an external AM antenna.
ffi
It h also helpful to put an insul6lor under theturntable,
ONo stereo effect and poor bss
oNo sound for 3-5 seconds after pow€r is switched on.
oStereo indicator not ljqhting on stereo broadcasts.
oVol!me level differen.e between toner and records.
oToo much power apDiied to soeakers.
o Not properly tuned in.
o nadio s;gnals too strong.
o RadiosiSnals too weak.
oPluos {+) and ( ) connections are reve6ed.
oMuting circuit is operating to eliminare the popptng nois when
poh€r is turned on.
oMUTING/MODE switch is in the OFF/MONO position-
o Rec6iver signal strenght and 160rd levelare different,
oAdjust the ATTENUATOB contrcl.
o lnstallan attenlator between theantenna and the antenna
olnstall outdoor antenna
oCorret the pluOs connetions.
oThis is not a rnalfunction.
o lnsl8lloltdoor FM anlenna.
oPlace the MUTING/MODE switch in the ON/AUTO
olt is not always possible to remedy this comptetely.

15
SPECIFICAMONS
1.(1} FM TUNER SECTION
Usable sensitivity
MONO
STEREO
50dB quieting sensitivity
MONO
STEREO
Signal to noise ratio
MONO
STEBEO
Frequency response
Total harmonic distortion
(at lkHz,65dBt)
MONO
STEREO
Capture ratio
Alt€rnate channel selectivity
Spurious response ratio
lmage response ratio
lF rosponse ratio
AM suppression ratio
Stereo separation
WIDE
NARROW
Subcarrier product ratio
SCA reiection ratio
Tuning range
(IHF}
11 .zdBt \2.0 pv)
22.7dBI l7 .5 pv)
19.2d Bf {5.0 rV)
39.2dBf (50pV)
80dB
75d B
il dB from 30Hz to lskHz
1-(2} FM TUNER SECTION
Sensitivity
(at 40kHz deviation)
MONO (S/N 26dB)
STEREO (S/N 46dB}
lmage frequency reiection
(at 98MHz)
lF reiection
(at 98MHz)
Spurious reiection
(at 98MHz)
AM suppression
Selectivity
(at 40kHz deyiation,
+300kHz)
Signal to noise ratio
(at 40kHz deviationl
MONO
STEREO
Total harmonic distortion
(at lkHz, 40kHz deviation)
MONO
STEREO
Stereo separation
(at 1kHz, 40kHz deviation)
Frequency response
2-(1} AM TUNER SECTION
Usable sensitivity
(bar antenna)
Selectivity
Total harmonic distortion
lmage lesponse ratio
lF response ratio
Hum and noise
Tuning range
(DIN)
1.2pV
32 pY
78dB
85dB
90dB
60dB
55dB
40d B
70dB
75d B
72dB
o.06% (wrDE)
0.15% (NABBOW)
0.08% (wlDE)
0.3% (NABBOW)
45dB (WrDE)
35dB (NARROW)
tldB from 30 Hz to 15kHz
(rHF)
45dB
30dB
o.gvo
40d B
70d B
50dB
525kHz to 1605kHz
(WIDE)
(NAB BOW)
(WIDE)
(NAB FOW)
0.05% (wrDE)
0.2% (NAHHOW)
0.08% (wtDE)
0.5% (NARBOW)
0.8d8 (wrDE)
1.5d8 (NARHOW)
45dB (WrDE)
75dB (NABBOW)
90dB
80dB
80dB
55dB (WrDE)
sodB (NAHBOW)
45dB at 1kHz,
35dB at 1okHz
40dB at 1 kHz,
30dB at 1OkHz
70dB
70dB
88MHz to 108M Hz

16
2.121 AM TUNER SECTION (DIN)
Selectivity
(bar antenna. at 30%
modulation, S/N 26dB)
Signal to noise ratio
(at 5mV/m, 30% modulationl
Selectivity (at +9kHz)
lmage frequency reiection
(at lMHzl
lF reiection (at lMHz)
Total harmonic distortion
(at 30% modulation)
3 PREAMPLIFIER SECTION
lnput sensitivity/impedance
PHONO MC
PHONO MM
AUX, PLAY 1, PLAY 2
Output level/impedance
OUTPUT
REC 1, BEC 2
PHONES (8 ohms)
Equivalent input noise level
(lHF, A network)
PHONO MC
PHONO MM
AUX, PLAY 1,PLAY 2
Signal to noise ratio
(lHF, A network, at rated
outpuil
0.1mV/10 ohms
2.3mV/50k ohms/100pF
i 50mV/50k ohms
1V (rated output)/600 ohms
18V (maximum output)
15OmV/600 ohms
6OOmV (at output 1V)/15 ohms
650mV {maximum output) (headphone
impedance from I ohms to '16 ohms)
-157dB(V) (47 ohms terminated )
-1 36dB(V) (closed circuit)
-1 26dB(V) (closed circuit)
PHONO MC
PHONO MM
AUX, PLAY 1, PLAY 2
Signal to noise ratio (DlN)
PHONO MC
PHONO MM
AUX, PLAY I,PLAY 2
Total harmonic distortion
(at rated output attenuator
-20dB from 20Hz to 20kHz
PHONO MC
PHONO MM
AUX, PLAY 1. PLAY 2
Channel separation
PHONO MC,
PHONO MM
PLAY 1. PLAY 2
Frequency response
PHONO MC,
PHONO MM
PLAY 1, PLAY 2
Tone control
BASS
TREBLE
Subsonic filtel
Phono overload level
(at lkHz with 0.1% THD)
PHONO MC
PHONO MM
Power consumption
Dimensions
(WxHxD)
Weight
Supplied with: T shaped antG[na
77dB (47 ohms terminatedj
84dB (colsed circuit)
1 10dB (colsed circuit)
72dB {47 ohms terminated)
73dB 12.2k ohms terminated )
106d8 (colsed circu;t)
92dB @7k ohms/250pF terminated )
0.005%
0.oo3yo
0.003%
Crosstalk is less than noise
level at'lkHz. 80dB at 20kHz
Crosstalk is less than noise
level at 'lkHz, 100dB at 2OkHz
+O.2dB from 20Hz 1o 2OkNz
(F rAA STD)
,r8sdB from 1OHz to 100kHz
t1odB at 100kHz
+10d B at '10kHz
l BHz (-6d B/oct)
12mV
290mV
30w
425x170x292mm
(16-3/4 x 6-3/4 x 11-112")
7.5ks (16-1l2 lbs)
300 pVlm
50dB
30dB
40d B
70dB
o.8v,
MELCO SALES, tNC.
3030 East Victoria Street, Compton, Catifornia 9022j, U.S.A_
T et.: 121 3) 537.1 132,'telex: 0673278
Toll Free: l80q) 421,1132 (Outside of Catifornia)
Design and specifications are subject to change without notice for improvemenis.
lB-1075-2 Prinred in Japan