Yamaha K-220 User manual

tance to rain or moisture,
NA
NA ARRA
RARA
deka
eine
Means sti
ot expose this appl
don
To prevent fire or shock hazard,
WARNING:
Pues
ae
Sea
3
ar
DRRR
AYBACK
TAPES/MAINTENANCE
TYPE NOISE REDUCTION
SPECIFICATIONS
PL
IRECORDING AND:
CASSETTE
DOLBY C-

"CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
BD : iu
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER (OR BACK). NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
e Explanation of Graphical Symbols
The lightning flash with arrowhead
symbol, within an equilateral triangle,
is intended to alert you to the presence ..
of uninsulated ‘dangerous voltage”
within the product’s enclosure that
may be of sufficient magnitude to
constitute a risk of electric shock to
persons.
The
exclamation
point
within
an
equilateral
triangle
is
intended
to
alert
you
to
the
presence
of
important
operating
and
maintenance
(servicing)
instructions
in
the
literature
accom-
panying
the
appliance.
/ o
SAFETY INSTRUCTIONS
1 Read Instructions — All the safety and operating
instructions should be read before the appliance is operated.
= Retain Instructions — The safety and operating
instructions should be retained for future reference.
3 Heed Warnings — AIl warnings on the appliance and in
the operating instructions should be adhered to.
4 Follow Instructions — All operating and other instruc-
tions should be followed.
= Water and Moisture — The appliance should not be
used near water — for example, near a bathtub, washbow!,
` kitchen sink, laundry tub, in a wet basement, or near
swimming pool, etc.
6 Carts and Stands — The appliance should be used only
with a cart or stand that is recommended by the manufac-
turer. '
/ Wal! or Ceiling Mounting — The appliance should be
mounted to a wall or ceiling only as recommended by the
manufacturer.
=> Ventilation — The appliance should be situated so that
its location or position does not interfere with its proper
ventilation. For example, the appliance should not be
situated on a bed, sofa, rug, or similar surface that may
block the ventilation openings; or placed in a built-in installe
tion, such as a bookcase or cabinet that may impede the flov
of air through the ventilation openings.
g Heat — The appliance should be situated away from
heat sources such as radiators, stoves, or other appliances
that produce heat.
1 O Power Sources — The appliance should be connect-
ed to a power supply only of the type described in the
operating instructions or as marked on the appliance.
“| “| Power-Cord Protection — Power-supply cords
should be routed so that they are not likely to be walked
on or pinched by items placed upon or against them, paying
particular attention to cards at plugs, convenience
receptacles, and the point where they exit from the
appliance.
4 = Cleaning — The appliance should be cleaned only
as recommended by the manufacturer.

4 3 Nonuse Periods — The power cord of the appliance
should be unplugged from the outlet when left unused for a
long period of time.
1 ra Object and Liquid Entry — Care should be taken
so that objects do not fall into and liquids. not spilled into
the inside of the appliance.
1 FS Damage Requiring Service — The appliance should
be serviced by qualified service personnel when:
A, The power-supply cord or the plug has been damaged:
or
B. Objects have fallen, or liquid has been spilled into the
appliance; or
C. The appliance has been exposed to rain; or
D. The appliance does not appear to operate normally or
exhibits a marked change in performance; or ;
E. The appliance has been dropped, or the cabinet damag-
ed.
1 © Servicing — The user should not attempt to service
the appliance beyond those means described in the operat-
ing instructions. All other servicing should be referred to
qualified service personnel.
1
The K-220 is a sophisticated stereo cassette deck. To en-
sure proper operation for the best possible performance,
please read this manual carefully.
2
Choose the installation of your K-220 carefully. Avoid
placing it in direct sunlight or close to a source of heat.
Also avoid locations subject to vibration and excessive
dust, heat, cold or moisture. Keep it away from such
sources of hum as transformers or motors.
3
Do not open the cabinet as this may result in damage to
the deck or electrical shock. If a foreign object should get
into the deck, contact your local dealer.
4
When removing the power plug from the wall outlet, al-
ways pull directly on the plug; never yank the cord.
5
Do not use forece when operating switches and knobs.
6
When moving the deck be sure to first pull out the power
plug and remove all cords connecting the deck to ather
equipment.
7
Do not attempt to clean the K-220 with chemical solvents
as this may damage the finish. Use a clean, dry cloth.
8
Never allow metallic items (e.g. screwdrivers, tools, etc.) to
come near the record/playback head assembly. Doing so
may not only scratch or damage the head's mirror-smooth
finish, it may change the magnetic characteristics of the
heads, causing a deterioration in reproduction perfor-
mance quality.
9
Although the record/playback head used in the K-220 is a
high quality permalloy laminate head with outstanding
reproduction characteristics, it can become dirty through
the use of old tapes of from dust accumulation over time.
This can have a serious effect on reproduction quality.
Clean the heads regularly with one of the commonly avail-
able head cleaners or with cleaning solutions as explained
later in this manual.
10
Be sure to read the “Troubleshooting” section of this
manual for advice on common operating errors before
concluding that your K-220 is faulty.
11
Keep this manual in a safe place for future reference.

Be sure to connect the left (L) and right (R) channels consistently.
NOISE REDUCTION SYSTEM MANUFASTURCO UNDER
LICENSE PROM OOLBY LABORATORILS LICENSING
CORPORATION “OOLBY AND THE
DOUBLE-D SYM30L ARE TRACEMARAS, OF COLBY
LABORATORIES LICENSING CORPORATION
SS CAUTION, | Í
RISK CF ELECTRIC SHOCK }
O0 NOY OPEN j e
ATTENTION - R'SQUE Ok CHOC ELECTRIQUE NE 7AS
DIYRIR
WARNING - TO PREVENT FIRE OR SHOCK HAZARD, DO
NOT EXPOSE TIS APPLIANCE TO. RAIN OR MOISTURE.
@
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OVOLTS WATTS 6CHz
RIPPON GAKK CO. LTD.
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K-220 rear panel
l
HOW TO LOAD AND UNLOAD CASSET-
il
TES
. Open the cassette compartment cover by pressing
Connect to the Eject button,
Deck
side
Amplifier
side
an
AC
power
outlet
.
The
side
of
the
tape
you
wish
to
record
or
play-
LINE
IN/REC“#—™="REC
OUT
back
should
be
facing
the
front.
Insert
the
cassette
LINE
OUT/
with
the
exposed
tape
edge
down,
and
fit
it
into
the chamber.
PLAY BACK Sieg P
P
7
,
PLAY
AE
B
Push
the
cassette
cover
closed
until
you
hear
an
Verify Land A, then plugin audible slick
|
firmly.
To
unload
the
cassette,
press
the
Eject
button.
i
RECORDING
Remember
to
keep
the
cassette
compartment
cover closed when not using the deck to protect
h d d i
= REAR PANEL CONNECTIONS e
Connect the power cord to an AC outlet or to the AC outlet 9 "7
provided on the rear panel of your receiver, integrated
l nae The exposed edge of the tape should
amplifier, or control amplifier. P g P
be facing down when inserted into
the cassette compartment for
Make sure that power to both the K-220 and your amplifier either playback or recording,
(receiver, etc.) is turned off before making connections.
The White plug on the paired connecting cables corresponds
to the Left channel and the Red plug corresponds to the
Integrated amplifier, Right channel. The Line Out (Play jacks on the K-220
preamplifier or receiver. should be connected to the Tape PB (Playback Input) jacks
on your amplifier, and the Line In (Rec) jacks on the K-220
should be connected to the Rec Out (Rec Output) jacks on
*Plaase refer to the amplifier instructian your amplifier, Make sure that the left and right channel
manual for more detailed instructions connections are properly made, and that the plugs are
on connecting the deck to your system, insterted firmly.

YAMA A NATURAL SOUNU STERED CASSCTTC beck K-20
"PEAK LEVEL.
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@® Power Switch (POWER)
This is a “‘push-on, push-off” type power switch.
© Eject Button (EJECT)
To load a cassette tape, press the Eject button and the
cassette compartment cover will open. Keep cover closed
when the deck is not in use to protect heads and
mechanism from cust, etc,
@ Cassette Compartment
@ Tape Counter/Reset Button (TAPE COUNTER)
Before recording a tape, it’s a good idea to press the Reset
Button to set the tape counter to “000”. This allows you
to keep track of where on the tape individual selections
begin and end, so that setting the tape counter to “000
again before playback will let you use it as a guide in
locating selections on the tape during playback.
a 6 TIR |
TAPE COUNTER PLAY
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TAPE COUNTER
000”
“065”
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170”
Selection 1
Selection 2
Selection 3
Selection 4
Example:
@ Rec Indicator (REC)
When the Rec/Pause button is pressed, the Rec stand by
mode wil! be engaged, and this indicator wil! light.
It will flicker during the Auto Rec Mute mode.
@ Dolby NR Indicators (DOLBY NR)
The corresponding Dolby NR indicators will light up
when the Dolby NR switch is turned on, and either Dolby
B or C type noise reduction is selected.
K- P21
@ Rewind/Play/Fast Forward/Stop (Tape Travel
Operation Control Panel)
REW Press the “ << ” section of the control panel to
rewind the tape.
PLAY Press the “PLAY” section of the control panel
for playback. It is also necessary to use this
contro! to engage the record mode, To begin
recording, it is necessary to engage the Play mode
while in Rec Standby,
FFWD Press the ’ PP ” section of the control panel to
fast forward the tape.
STOP Press the “STOP” section of the control panel to
stop the tape while in any mode.
Rewind Fast Forward
Press the symbol lightly
The deck will stop automatically when the tape
reaches the end of a side during playback, record, fast
forward or rewind,
Pressing the control panel in between the indicated
sections instead of directly on them may give you a
mode other than the one you want.
© Rec/Pause Button (REC/PAUSE)
Pressing this button engages the Rec Standby mode, and a
red indicator “REC” will light. While in this mode, the
level meters will function, allowing you to monitor the
recording signal level of your program source and set the
proper recording level before beginning to record, (Please
refer to the “Setting the Recording Level” section of this
manual.) To initiate recording from the Rec Standby
mode, press the Play button. Pressing the Rec/Pause
button during actual recording engages the Pause mode,
and the Play button will be automatically released. To
begin recording again from the Pause mode, press the Play
button.
= Standby
(Adjust level, balance)

K-220
@ Rec Mute Button (MUTE)
During Recording: When the MUTE button is pressed at
any time during-recording, a 4-second blank interval is
automatically recorded on the tape. Then, the Rec Pause
mode is engaged automatically. (Auto Rec Mute
Operation)
In order to record a blank interval longer than 4 seconds,
press the MUTE button and hold it in for the desired
length of time, After the button is released, the 4-second
blank interval will also be recorded automatically, after
which the Rec Pause mode is engaged automatically. To
create a blank interval on the tape during continuous
recording, press the Play button during rec mute
operation.
@ Tape Selector (TAPE)
Press the appropriate button for the type af tape being
used—Normal (I/NORM}, Chrome (II/CrO2), or Metal
(IV/METAL). The K-220 will adjust the proper bias, level,
and equalization settings for the type of tape being used.
(Please refer to the ‘Cassette Tapes" section of this
manual).
* This deck is not suited for use with Ferrichrome
(FeCr) tapes.
@ Peak Level Meters (LEVEL)
Indicates the peak of the signal level during recording and
playback over a range from —10dB to +6dB.
® Dolby NR Switch (DOLBY NR)
Dolby noise reduction is an extremely effective method
of reducing background hiss on tapes. The K-220 incorpo-
rates both Dolby B NR and the newer Dolby C NR
system. Dolby C NR is approximately twice as effective as
Dolby B NR, providing new levels of noise-free perfor-
mance. Switch the Dolby NR system on with the button
on the left, then select Dolby B or C NR with the button
on the right.
Tapes recorded with Dolby B NR should be played back
with Dolby B NR on, and tapes recorded with Dolby C
NR should bs played back with Dalby C NR on. Tapes
not Dolby NR-encocded should be played back with-Dolby
NR off.
DOLBY NR
The Dolby NR switch is
set to the same position
on record and play.
OFF A BTY
ON æ C TYPE
CJC
* Dolby and the double D mark are trademarks of
Dolby Laboratories Licensing Corp, Dolby noise
reduction system manufactured under license from
Dolby Laboratories Licensing Corp.
® Auto Mode Switch (AUTO MODE)
Repeat: This will initiate repeat playback for one entire
side of the cassette tape. After the tape has been
reproduced, it will be rewound to the beginning, and it
will be played back again. This function will stop after
16 consecutive operations.
Timer Play: By using a separately available timer, this
function permits timer activated playback, so you can
wake-up to your favorite music, etc. (See page 7.)
Timer Rec: By using a separately available timer, this
function allows you to carry out unattended recording.
(See page 7.)
* Turn the corresponding switches off when not using
the repeat playback feature or the timer feature,
Especially for the TIMER REC position, the unit will
stay in the recording mode as long as the power is on,
and therefore can accidentally erase the prerecorded
contents of the tape.
@® Headphone Jack (PHONES)
Connect a set of headphones here for monitoring
recording or playback.
® Recording Level Controls (REC LEVEL)
These controls are used to adjust the input level of the
signal coming from the rear panel input jacks for
recording, and the adjustable signal level is displayed on
the Level meters. (Please refer to the “Setting the Record-
ing Level’ section of this manual for an explanation of
how to set proper recording levels.)
* Auto Source Change
When tape playback has finished and the auto stop
function has cancelled the play mode, the LINE IN
signal (if the tuner is connected to the LINE IN
inputs, then the tuner output signal) will automati-
cally be switched to. Signal level can then be adjusted
with the REC Volume control.
# SETTING RECORDING LEVEL
In order to make recordings with the best possible signal-
to-noise ratio, it is important to set the recording level at
the highest level possible without introducing distortion,
Push the Rec/Pause button to engage the rec standby
mode, and play a section of the pragram to be recorded.
Watch the level meters and adjust the recording level so
that the average meter reading is between —5dB and
+3dB, with occasional peaks no higher than +6dB, Adjust
the level balance as necessary. Now you are ready to
begin recording,
Set so peaks reach +6dB
occasionally. Exceeding
this point can cause
distortion,
In normal cases, set
so the maximum
value is in this range,
PEAK LEVEL\’
= JEE
Use the Rec Level
controls to set the
proper level.

RECORDING
Prior To Recording:
Make sure that all power cord connections and all con-
nections between components are properly made.
Check that the AUTO MODE switch is off, then turn
on the Power swtich,
Open the cassette compartment cover by pressing the
Eject button.
Load a cassette tape and briefly fast forward the tape
to get past the leader tape on the beginning of the
cassette,
Leader tape
Cassette shell
Select the proper Tape Selector setting for the type of
tape being used — Normali {(I/NORM), Chrome
(II/CrO.), or Metal (IV /METAL).
For recording to be made with Dolby NR, turn the
Dolby NR switch on, and select either Dolby B or C.
Press the Rec/Pause button to engage the Rec Standby
mode.
Run a sample of the program source to be recorded
through the deck so that a proper recording level can
be set using the Rec Level controls and the Level
meters. (Please refer to the previous instructions regard-
ing level setting.)
Press thie reset button to reset the tape counter to the
“000” position to reference the position of individual
selections on the tape. The tape counter may thus be
used as a program guide during later playback,
Starting To Record:
When the Play” section of the control panel is pressed,
the deck will begin recording.
You can monitor the recording by connecting head-
phones or through speakers connected to the amplifier.
When MUTE button js pressed during recording, a
4-second blank interval is automatically recorded on the
tape, after which the rec pause mode is engaged,
(Please refer to page 5” @ Rec Mute Button")
If you wish to suspend recording temporarily, pressing
the Rec/Pause button engages the Rec Standby mode
which serves the same function as a Pause button found
on other decks. To begin recording again, press the
“Play” section of the control panel.
. When you have finished recording, press the ’’Stop”
section of the contro! panel,
Pw
PLAYBACK
Prior to Playback:
Make sure that all connections between components
and all power cord connections are made properly and
securely.
Make sure that the AUTO MODE switch is set to the
OFF position.
Turn the Power switch on,
Open the cassette compartment cover by pressing the
Eject button.
Load a recorded cassette tape. l
Select the proper Tape Selector setting for the type of
tape being used — Normal (I/NORM), Chrome
(II/CrO,), or Metal (IV /METAL).
For tapes recorded with Dolby NR, make sure that the
Dolby NR switch is turned on, and select either Dolby
B or C as appropriate,
Set the auto mode switch to the REPEAT FULL
position when carrying out repeat playback.
Beginning Playback:
. When the “PLAY” section of the control panel is
pressed, the Play mode will be engaged.
Adjust the Balance, Volume, and Tone controls of
your amplifier to the desired settings.
Press the STOP” section of the control panel to end
play.

K-220
# TIMER RECORDING/PLAYBACK A, Set the AUTO MODE switch to the TIMER REC
When using the Timer Rec/Play switch in combination position,
with a conventional audio timer such as the Yamaha DT-2, 5. Set the timer to the desired times. It is advisable to set
the timer to begin recording slightly before the actual
recording time, and to end slightly before the actual
recording time, so that you leave some roam for later
editing.
The timer will send power to the amplifier, tuner and
deck at the preset time, turning all the components on
and initiating the recording mode,
CAUTION:
If the tape cannot be ejected after time recording, turn the
AUTO MODE switch off and the K-220's power switch on;
the tape can then be ejected,
it is possible to make recordings and initiate playback at
‘any time automatically by presetting the deck in advance.
è Timer Recording:
1. Refer to the Connection Diagram and make sure that 6.
all power cord connections between the timer and
amplifier are properly made, No change in any of the
other connections between deck and amplifier, ete., is
necessary. .
2. After turning on the power to each component, select
the station on your FM tuner which you want to
record and turn down the volume on your amplifier.
This will have no effect on the recording signal level.
Remember to set the proper recording level for taping
from the tuner (as explained earlier in this manual)
prior to setting the deck for timer recording.
3. Following the instructions given in the "Prior To
Recording” section of this manual, put the K-220 into
the Rec mode.
Set the bet |
e Connection for timer
recording/playback
FED ERO org amar PDO
Make sure all
Power switches
are turned on,
Sees Werte aaaea
| The power cord of both
' deck and tuner should be
4 connected to the amplifier’s |
rear panel AC outlet,
No change in con-
nections between
Amplifier
The power cord of the amplifier
should be connected to the AC
outlet on the audio timer.
annuarnonmarr?
— a
Timer Playback:
AIl connections are the same as for timer recording.
Following the instructions given in the “Prior To Play-
back" section of this manual, put the K-220 into the
Play mode,
Turn on the amplifier and adjust the Balance, Volume
and Tone controls,
Set the input mode selector of your amplifier to the
Tape mode,
Set the timer to shut off at the time you wish to end
playback.
Set the AUTO MODE switch on the K-220 to the
TIMER PLAY position,
At the preset times, the timer with turn power on to the
amplifier and tape deck and begin playback, It will shut
power off, at the preset time as well, ending playback.

= CASSETTE TAPES
There are many different types of cassette tapes sold on
the market; however, they all conform to standard specifi-
cations so that any brand may be used with the K-2720.
@ Classification of Cassette Tapes By Recording Time
Cassette tapes are available in a number of forms according
to the amount of time in minutes it takes to record or
playback both sides of the tape.
Record/Playback Time
Length of Tape
One way (m)
(Min.)
* Yamaha suggests that you not use C-120 cassettes since
the extreme thinness of the tape in these cassettes
makes them susceptible to mechanical and electrical
problems,
ə Classification of Cassette Tapes by Formulation
Cassette tapes are available in four basic types depending
on their formulation, ar type of magnetic material and
manufacturing process. These four types are commonly
known as Normal: Type I (LH), Chrome: Type H (CrO2),
Ferrichrome (FeCr}, and Metal: Type IV (Metal), and they
each require specific bias, level, and equalization settings
for optimum performance. The K-220 provides a tape type
selector which gives you the proper bias, level, and equaliza-
tion settings according to which type you have selected.
* The K-220 does not have the required setting for
Ferrichrome {FeCr} tape, since this tape formulation
is not widely used, Should you use a Ferrichrome tape,
it should be recorded and played back at the Normal!
(LH) settings. This will result in an unnatural high fre-
quency emphasis. But this effect may be compensated
for somewhat by adjusting the tone controls of your
amplifier.
m PROTECTION YOUR RECORDING
All cassette tapes are provided with erasure protection
noles to prevent recorded tapes from being accidentally
erased. There is a smal! tab covering the hole on each
cassette, and it should be broken off with a screwdriver
after recording a tape. Without this tab covering the hole,
it is impossible to record on that tape again; thus, you can
keep any recorded tape for as long as you wish without
fear of accidental erasure. Should you wish to use a cassette
tape protected.in this way for later recording, simply
covering the hole with scotch tape will permit erasure and
re-recording.
Break off tab with
screwdriver,
scotch tape
e TAKING UP SLACK IN THE TAPE
Slack in the tape inside of the cassette shell can be cor-
rected by simply inserting a pencil into one of the spools
and winding it until all the slack is taken up,
# STORAGE OF YOUR CASSETTE
After putting a cassette back into its case, store in a loca-
tion away from exposure to direct sunlight, humidity,
high temperatures, and magnetic fields (away from televi-
sion sets, speakers, etc.). High temperatures and humidity
will damage the tape itself, while exposure to magnetic
fields may cause a loss of recorded material.
E MAINTENANCE OF YOUR K-220
After using your K-220 for a certain length of time,
it is possible that the sound of your tapes may deter-
lorate with fading, vibration, or noise as a noticeable
result, This is caused by an accumulation of dirt or
dust on the heads, capstan, or pinch roller, and
magnetization of the heads. It is advisable to periodi-
cally clean and demagnetize the heads and to clean
the capstan and pinch roller. Use a commonly avail-
able cotton swab and head cleaning solution to do
this, or use a special head cleaning tape. Head demag-
netizers are also commonly available.
* When cleaning the heads, be careful not to apply
unnecessary pressure. When demagnetizing the
heads, be sure to follow the instructions of the
head demagnetizer carefully.
For better access to the head assembly, the cassette
compartment cover is detachable by pulling
upward on it after it has been opened, To re-attach
it, reverse the same procedure,
Rec/PB head T Eac n Capstan
VW VW fi fi
Erase head ‘S Pinch roller

With cassette tapes, the most noticeable form of noise is
high-frequency hiss. To reduce this hiss noise, the K-220
has been equipped with a newly developed Dolby C noise
reduction system in addition to its conventional Dolby B
NR. Either type of noise reduction may be selected with
the switch provided,
Dolby B NR has a noise-reduction effect of about 10dB in
the high-frequency range. The corresponding figure with
Dolby C NR is about 20 dB, but this is over the entire
rnage where the human ear is most sensitive to noise
(2 kHz to 8 kHz). Dolby C NR alsa improves the tape’s
MOL. {maximum output level).
Dolby C NR has two new circuits: a spectral skewing cir-
cujt and ari anti-saturation network. By improving the
saturation lavel of the tape it is possible to prevent high-
frequency loss and encode/decode error, etc., improve
dynamic range and signal-to-noise ratio, and make it easier
+10
: Frequency response C Tyne
dB
ee B Type
” {—10dB) =~
=EN “ (—20d8) w~
Level (dB}
L ©
—60 Dolby off
Noise reduction effect
—80
20 100 500 ik 2K 5K 10K 20K
Frequency (Hz)
to set the recording level. With Dolby C NR, it is possible
to achieve the same noise reduction effect at both high
and low signal levels and to set the recording level at a
point where side effects such as “breathing” are eliminated.
Also, by expanding the operating frequency range to two
octaves more than that of Dolby B NR, overall noise
balance is obtained and the system also becomes effective
against high frequencies from the power supply.
The graph shows the frequency response and the noise-
reduction effect of recording and playback with Dalby B
NR and Dolby C NR. The noise reduction effect of Dolby
C NA is larger — approximately 20 dB.
Dolby noise reduction is a 2-part process that acts both on
recording and playback; be sure that the Dolby NR switch .
is set to the same position on record and play.
* Noise in the source material can not be reduced with
the Dolby NR system,
TV BO pea ee ak eS wae ee. 4-track, 2-channel record-
ing and playback stereo
cassette tape deck
Heads
Rec/Play head ........ Hard permalloy
Erase head, ......,..-.. Ferrite
Motors
Capstan g ore. circa le: a d DC servo motor
PRO! tg hoe eee Bh ee Ss a Flat torque DC motor
Wow and Flutter ........ No more than +0.15% W.peak
0.08% W.RMS
Fast winding time ....... Approx. 95 seconds (C-60)
Frequency response
Normal tape (—20dB) .... 40 to 16,000 Hz +3dB
Chrome tape (—20dB) .... 40 to 16,000 Hz +3dB
Metal tape (~20dB) ...... 40 to 16,000 Hz +3dB
Signal to Noise ratio
Dolby off x uteri. oe Gt dy he Vans ' 68 dB
Dolby BON age cw sk et .. 66dB
Dolby Con 3-44 ata scx 740B
Harmonic distortion ...... Less than 1%
Input Sensitivity/Impedance
EINS? ce gti hcg! Be Sots, fe oige N 45 mV/50 k-ohms
Output Level/Load Impedance
LING: soared, Oe, a ard 360 mV/47 k-ohms
Headphones.......... 40mV/8 ohms
Power supply .......... AC120V, 60Hz
Power consumption. ...... 15W
Dimensions (W x Hx D). ... 435x112 x 225 mm
(17-1/8" x 4-3/8" x
8-7/8"')
Weight .............. 4.0kg (8 Ibs 13 oz)
Specifications subject to change without notice.

Before
assuming
that
your
amplifier
is
faulty,
check
the
following
troubleshooting
list
which
details
the
corrective
action
you
can
take
yourself
without
having
to
call
a
service
engineer.
If
you
have
any
doubts
or
questions,
get
in
touch
with
your
nearest
Yamaha
dealer,
ə Tape doesn’t move (in recording and playback). Power plug not properly plugged in.
End of tape. Replace with new cassette tape.
Slack tape, or tape spillage caught around capstan
@ Tape stops in the middle of recording, or playback, Remove tape.
Cover the hole remaining after removal of tab with scotch
tape.
Protective tab broken off,
REC LEVEL control turned down.
Too high REC level.
® Fails to record.
Properly re-adjust REC level,
®
The
recorded
sounds
are
distorted.
Properly
re-adjust
REC
level,
Replace with new cassette tape.
Tape worn,
: Replace with new cassette tape,
e Excessive noise, Tape worn
® Sounds become faint and sometimes inaudible,
Connection cord improperly inserted,
Check connection, and reinsert plug properly.
Head is magnetized.
Demagnetize head with head demagnetizer.
Wipe off dust and dirt with commonly available cotton
swab dipped into head cleaning liquid.
Head js dirty.
Wipe off dust and dirt with commonly available cotton
swab dipped into head cleaning liquid.
Dirty capstan, pinch roller, etc,
Tape is unevenly wound,
Dolby NR switch not properly set.
Excessive Wow (Wavering of the sound).
Rewind tape using F. FWD button, or REW button,
Dolby B-encoded tapes: play back with Dolby B on.
Dolby C-encoded tapes: play back with Dolby Con,
Others: Dolby off. .
e Playback sounds are poorly balanced,
TO

SINCE 1887 Lop AKA
NIPPON GAKKI CO., LTD. HAMAMATSU, JAPAN
BWgG.B Printed in Japan G