Sony TC-K620 Operating instructions

= ONY 3-751-741-21 (1)
Stereo
Cassette Deck
Operating Instructions
PROPERTY BF THE
KATIOKAL TECATICAL DEPT
FILE COPY
TC-K620 Do not remr ve
© 1990 by Sony Corporation
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION : TO REDUCE THE RISK OF ELECTRIC SHOCK,
DC NOT REMOVE COVER {OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
This symbol is intended to alert the
user 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.
This symbol is intended to alert the
user to the presence of important
operating and maintenance (servicing)
instructions in the literature
accompanying the appliance.
* The graphical symbols are on the rear enclosure.
Owner’s Record
The model and serial numbers are located at the rear.
Record the serial number in the space provided below.
Refer to these numbers whenever you call upon your
Sony dealer regarding this product.
Model No.TC-K620 Serial No.
INFORMATION
This equipment generates and uses radio frequency
energy and if not installed and used properly, that is, in
strict accordance with the manufacturers instructions,
may cause interference to radio and television reception.
it has been type tested and found to comply with the
limits for a Class B computing device in accordance with
the specifications in Subpart J of Part 15 of FCC Rules,
which are designed to provide reasonable protection
against such interference in a residential installation.
However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does
cause interference to radio or television reception, which
can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference
by one or more of the following measures:
Reorient the receiving antenna
Relocate the equipment with respect to the receiver
Move the equipment away from the receiver
Plug the equipment into a different outlet so that
equipment and receiver are on different branch
circuits.
If necessary, the user should consult the dealer or an
experienced radioftelevision technician for additional
suggestions. The user may find the following booklet
prepared by the Federal Communications Commission
helpful:
“How to Identify and Resolve Radio-TV Interference
Problems”.
This booklet is available from the U.S. Government
Printing Office, Washington, DC 20402, Stock No.
004-000-00345-4.
Table of Contents
Features
Getting started
Features coerce reece ear Ree erase eee nemennes 3
PreCaUtiONS «cover eee creer erence errr ennenee 3
Installation .............—.———————_.e-...eeirerennecineerieee ree renencenenecanecrnos 4
Connections ............. eee een reee re eneennenrensa ns 4
Identification of front panel parts........................— 5
Playback
Playing back ..................—....e.eieecececeaneneo rea Der rUD Deere 6
Locating a selection
— Automatic Music Sensor(AMS) ..................eee.eneeees 7
Playing back automatically after rewinding
lo LL (SJ 1 F= eee 8
Notes on cassettes .….…..….................…ccacrecencencenseneens 8
Locating a desired position using the counter
— Memory play .............e=.e=vreierireeereenenaa enero ner eneeme 8
The Accuracy of the digital linear counter ................ 8
Recording
Recording ....................ereeieereaciec reee eee necerecerrI EEE re Nene een 9
Adjusting the Recording Level ..................... mee... 10
Making an optimum recording according to the tape
type — Bias Adjustment..............——.————— 10
Monitoring the recorded Sound... 10
What is the Dolby HX PRO system? ................wewme. 11
Inserting a blank space during recording
— Record muting .............. rece eee 11
Using with a Timer
Timer-activated playback and recording ..............ecwme..—..... 12
Maintenance..................—......eeieearieeererceer eee rennecenreeareo re. 12
Specifications....................——....—.= reee e REA 13
Troubleshooting guide .………..….........…......…......…reriercessennenes 14
* Three-head system (separate recording, playback and
erase heads) which allows you to instantly check the
recorded sound while recording is in progress.
* Bias control to achieve the optimum bias current
setting for any tape.
* The Dolby HX PRO* system which improves the
linearity of the tape's high-range response during
recording.
* Easy-to-read digital linear counter which shows the
elapsed recording or playing time.
* The AMS function which provides easy access to a
desired selection.
* Dolby noise reduction and HX Pro headroom extension
manufactured under license from Dolby Laboratories Licensing
Corporation. HX Pro originated by Bang & Olufsen.
“DOLBY”, the doubie-D symbol 00 and “HX PRO” are trademarks
of Dolby Laboratories Licensing Corporation.
Precautions
On safety
+ Operate the unit only on 120 V AC, 60Hz.
+ Should anything fall into the cabinet, unplug the unit and
have it checked by qualified personnel before operating it
any further.
* Unplug the unit from the wall outlet if it will not be used for
a long time. To disconnect the cord, pull it out by grasping
the plug. Never pull the cord itself.
On operation
* When the unit is not used, turn the power off to conserve
energy and to extend the useful life of your unit.
* Because of a safety mechanism, the function buttons will
not operate if the cassette holder is not completely closed, if
there is no cassette in the cassette holder, or if the cassette
has been incorrectly inserted into the cassette holder
On head cleaning
The head and tape path should be cleaned after every 10
hours of operation. Dirty heads and a dirty tape path may
cause:
— loss of high-frequency response
— loss of sound volume
— sound drop-out
Note on cassettes longer than 90 minutes
The use of cassettes longer than 90 minutes is not
recommended except for long continuous playback.
For detailed safety precautions, see the leaflet
"IMPORTANT SAFEGUARDS”.
If you have any questions or problems concerning your unit,
please contact your nearest Sony dealer.
Installation
Notes on installation
e Place the unit with the front panel facing you in a e Do not throw away the carton and the packing
location with adequate air circulation to prevent material! They will come in handy when transporting
overheating of the unit. the unit or shipping it for servicing.
* Do not place the unit:
— near heat sources such as radiators or air ducts.
— in places subject to direct sunlight, excessive dust,
mechanical vibration or shock.
— in an inclined position.
— on a rug or other soft surfaces that would block the
ventilation holes on the bottom of the unit.
Connections
Notes on Connections
* Turn off the power to all equipment to be connected
before making any connection.
e Note that the red plug of the supplied connecting cord
is for right-channei (R) connection and the white plug
for left-channel (L) connection.
* The connecting cords should be fully inserted into the
jacks. A loose connection may cause hum pickup.
Cp QUID Another tape deck
Amplifier
0008 0006
0:00 6 4006 f
To a wall outlet
For | }
recording For playback TC-K620
)
Lo — y T
To an AC outlet 7 —
To an AC outlet
/— Signal flow
| From another tape deck np
To an AC outlet
T ther t deck
| o another tape de TC-K620
Signal flow
Identification of Front Panel Parts
For details, refer to the page number indicated in @.
[1] POWER switch
[2] Cassette holder
[3 | COUNTER buttons @
RESET button/MEMORY button
[4 LINEAR COUNTER ©
[5| MEMORY indicator 6
|6 | PEAK LEVEL METER O
[7] TAPE TYPE indicator ©
Remote sensor
You can remotely control this cassette deck with:
— A remote commander that has an mark and
comes with a Sony amplifier or receiver and which
can be used to control a cassette deck.
— An optional Sony remote commander that has an
mark.
[9] MONITOR button ®
DISPLAY MODE button @
[11]MPX FILTER switch ©
12] REC LEVEL (recording level) control O ©
13| DOLBY NR switch @ ©
BALANCE control ©
(15) BIAS (bias adjust) control ©
LEVEL (headphones level) control
HEADPHONES jack (stereo phone jack) Q
[18] Tape operation buttons
4 (rewind) button
pp» (fast forward) button
№ (stop) button
> (play) button (AMS*)
11 PAUSE button
© REC MUTE (record muting) button O
6 REC (record) button
19| & OPEN/CLOSE button
[20] TIMER switch ©
* AMS is an abbreviation for Automatic Music Sensor.
Playing Back
Follow the procedure below to play back a cassette.
a POWER-ON |
1 Turn on the amplifier and select
the tape function.
2 Insert the cassette with the side to be played facing
outward.
OPEN/CLOSE
a
=
3 Select the Dolby NR system.
DOLBY NR
Ol
4 Start playback
To stop playback Press №.
Press 11.
To restart playback, press II or >.
To stop playback
momentarily
To advance the tape | Press pm».
To rewind the tape | Press «td.
How to use the DOLBY NR switch
Set the DOLBY NR switch to the same position (B, C, or
OFF) that was used when the cassette was recorded.
Use the DISPLAY MODE button to select the display
mode
You may choose among three display modes by pressing
the DISPLAY MODE button: (1) all indications are
displayed; (2) only the linear counter is displayed; or (3)
no display.
The TIMER switch must be set to OFF
Otherwise, recording or playback will start automatically when
the power is turned on.
What is the Dolby NR system?
The Dolby NR (noise reduction) system reduces tape hiss
noise in low-level, high-frequency signals by boosting the
signals during recording and lowering them during playback.
Is it necessary to set the tape type being used?
No. The deck has an automatic tape type detection system. Of
the four major types of tapes, your unit can use Type |
(normal), Type Il (CrO,) and Type IV (metal). The tape detection
system automatically adjusts the equalization and bias current
to the optimum level for the type of cassette detected.
To change to recording mode during piayback
Keeping [> pressed, press @. The unit immediately switches
from playback to recording without stopping the tape. This is
useful when editing previously recorded material.
For headphone listening
Connect the headphone plug to the PHONES jack. The
listening level can be controlled with the LEVEL control.
Is it necessary to set the MONITOR button for playback?
No. The TAPE mode is automatically selected and TAPE is
displayed.
Note
The Dolby HX PRO System is effective only during recording,
not during playback.
Locating a Selection — automatic Music Sensor (AMS)
The AMS function detects the blank space between
selections, allowing you to quickly locate the beginning
of desired selections.
During playback, press pi» or 4d referring to the
following table.
Desired selection
Next selection Selection being played
>> <<
The PLAY indicator blinks while the AMS searches for
the beginning of the selection.
After locating the beginning of the selection, playback
will start automatically.
To ensure proper operation of the AMS?
There must be a blank of four seconds or longer between
selections. Use the record muting function to insert a blank
space when recording.
The AMS may skip a selection
If there is noise in the space between selections.
If the space is less than four seconds long.
If the «qq or >» is pressed immediately before the following
selection.
The AMS will treat the following as bianks:
— a long pause in the music
— a passage of low frequencies or very low volume
— a gradual increase or decrease in volume
To start operations while the cassette holder is open
Operations may be started while the cassette holder is open.
For example, when >> is pressed while the cassette holder is
open, the cassette holder will close and playback will start.
Similarly, pressing «a >, or IN while the cassette holder is
open will close the cassette holder and start the respective
operation.
Playing Back Automatically
After Rewinding—Auto Play
Locating a Desired Position
Using the Counter—memory Play
The Auto Play function automatically starts playing back
a cassette after rewinding it to the beginning.
| 1 2Y if MEMORY is displayed,
: | press the MEMORY button
to turn it off.
While holding down ">,
press «4.
After the tape is completely
a
|= |=
Nn
REC MUTE ' .
rewound, the unit will
automatically start playback.
Notes on Cassettes
To recover a cassette for
recording
Cover the respective slot
with tape.
To protect a recording
on side A or B
Break out the respective
tab. side A
© Tab for
side A
Tab for
side B
When using Type Il (CrO,) or Type IV (metal) cassettes
Be careful not to cover the detector slots which are
necessary for automatic tape type detection.
Type |l (CrO,) Type IV (metal)
Detector slots
Detector slots
Cassette care
* Avoid touching the tape surface of a cassette to prevent
contamination of the heads by dirt, dust, or oil on the skin.
* Keep cassettes away from equipment with magnets, such as
speakers and amplifiers, as erasure or distortion on the
recorded tape could occur.
* Do not expose cassettes to direct sunlight, extremely cold
temperatures or moisture.
The Memory Play function allows you to use the counter
to record a desired position on a cassette for fast
relocation and automatic playback later.
At the desired position.
[ ]memory]
[RESET [| >
V
- 000
200 The desired position is
memorized.
= To return to the desired position:
rz While holding down «4,
| > A | в | © press [>.
The tape is rewound to 0.00 and playback starts.
If you press only the «++ button, the tape will be
rewound and the unit will stop when the counter reaches
0.00 (Memory Stop).
The Accuracy of the Digital Linear Counter
This counter is not a digital clock, and thus the indicated
number will not exactly equal the actual elapsed time.
The difference between the number and the elapsed time
will vary depending on the type of tape being used. This
counter has been designed using Sony cassette tapes as
a standard.
You may want to check the accuracy of the counter
when using cassette tapes other than Sony's or tapes of
a special length.
C80 (thin hub)
C54 (thin hub)
Ч
C60, C0 (thin hub)
C46 {thin hub) C46 (thick hub)
Minute —1 0 +1 +2 +3
The counter indication is less The counter indication is more
than the actual tape running time. than the actual tape running time.
Do not turn off the power while using the counter
Turning the power off and then on again resets the counter to
0.00.
Recording
Follow the procedure below to record a program source
on a cassette.
| POWER—ON |
1 Insert the cassette with the side to be recorded facing
outward.
OPEN/CLOSE
a
2 Select the Dolby NR system.
DOLBY NR
Е
The unit will enter recording pause mode.
3 | >
PAUSE
u
4 Play the program source to be recorded.
5 Adjust the recording level and balance (see page 10).
REC LEVEL BALANCE
О ©
6 To start recording,
PAUSE (REC MUTE
To stop recording, press Ml.
|
If playback starts instead of recording
The cassette tab has been removed. To record on this
cassette, cover the slot with tape. (See page 8).
The TIMER switch must be set to OFF
Otherwise, recording or playback will start automatically in a
tew seconds when the power is turned on.
Is it necessary to set the MONITOR button for recording?
No. The source mode is automatically selected and SOURCE
is displayed. If you wish to monitor the recorded sound, press
the MONITOR button to select the TAPE mode.
To start recording while the cassette holder is open
If you press the REC @ button while the cassette holder is
open, the holder will close automatically and the unit will
switch to recording pause mode. This function allows you to
start recording at a moment’s notice.
How to check the total recording time of a tape
1 Press the RESET button at the beginning of a tape to reset
the counter to 0.00.
2 Press pp» 10 fast forward the tape to the end. The number
on the counter shows the approximate recording time.
To check the approximate remaining recording time on the
tape
1 Press the RESET button to reset the counter to 0.00.
2 Advance the tape to its end using a.
The number on the counter shows the approximate time
remaining on the tape.
Using the MPX filter to record FM broadcasts
When recording FM broadcasts with the DOLBY NR system,
set the MPX FILTER switch to ON ( the “FILTER” indicator will
be displayed). This tums on the MPX filter which eliminates
remnants of the 19 kHz stereo carrier and 38 kHz subcarrier
signals which may impair the operation of the DOLBY NR
system. Be sure that Dolby NR switch is turned on since the
MPX filter will not function otherwise. Note that the MPX
FILTER switch must be turned on only when the tuner is not
equipped with its own MPX filter or the equipped filter still
results in sound degradation during recording with the Dolby
NR system.
Recording
Adjusting the Recording Level
The optimum recording level, which differs according to
the tape type, is indicated on the Peak Level Meter for
each tape type.
Adjust the REC LEVEL control as high as possible
without exceeding the recommended range for the tape
type being used.
Recommended maximum PEAK LEVEL METER reading
Saturation level of Type | (normal)
and Type || (Cr0,) tapes
-30-20 —10 —4 о +2 ha +6 +8
8
|
de —-
L
R
ovu 00
Saturation level of
Type IV (metal) tapes
Tips on recording level adjustment
e If the recording level setting is too high, the recording
will be distorted; if it is too low, the tape will produce a
hissing sound. Therefore, the recording level should be
set as high as possible without causing distortion.
e |f the program source to be recorded has many high-
frequency signals, set the level to a relatively low
position.
Making an Optimum Recording According to the
Tape Type — Bias Adjustment
To obtain the optimum frequency response, use the BIAS
contro! to adjust the bias current according to the tape
type being used. Reducing the bias boosts high
frequencies but increases distortion. Increasing the bias
decreases distortion but suppresses high frequencies.
Balance the bias according to your listening preferences.
Bias reduced Bias increased
(high (high .
frequencies frequencies ду | Bias reduced (-)
boosted) suppressed) o
— E
BIAS 25
= 2
ol
Bias increased (+)
Frequency in Hz
In the case of Type IV cassette tapes, the frequency change
for any given bias setting will be minimal.
10
Monitoring the Recorded Sound
As this unit has three separate heads for recording,
playback and erasure, you can check the quality of a
recorded sound by comparing it with the input signal
before recording. (See the “MONITOR indication and
signal flow”)
While recording, use the MONITOR button to check that
there is no distortion due to excessive level settings or
sound degradation due to head contamination.
How to use the MONITOR button
To listen to the input signal before recording, press the
MONITOR button to select SOURCE.
To listen to the recorded sound from the tape, press
the MONITOR button to select TAPE.
MONITOR indication and signal flow
MONITOR
indication
Signal flow
Band REC LEVEL
| Recording O) LINE IN
head SOURCE
NIT
SOURCE o Q LINE OUT
TAPE
Playback head HEADPHONES
The signal to be recorded can be
monitored.
Band REC LEVEL
Recording LINE IN
head
TAPE LINE OUT
TAPE
Playback head HEADPHONES
| The recorded signal can be monitored.
Inserting a Blank Space
during Recording
— Record Muting
The Record Muting function allows you to insert a four-
second blank space on the tape to enable you to locate
the selection later with the AMS function (see page 7).
The Dolby HX PRO system provides improved linearity in You can also use the button to replace unwanted input
high-range frequency response during recording. Tapes with a blank space.
recorded with this system retain the same high quality
even when played back on other tape decks.
PAUSE REC MUTE
il O
High ? Î
| 2 1
Distortion |
output |
“10 kHz
|
|
| Nui 315 Hz distortion 1 While recording, press O and release it
L immediately.
Bias current —= High
Established bias current Y
— [reo] —
As shown above, characteristics such as output level and The indicator will start to blink. During this time,
distortion differ widely according to the bias (high- no incoming signals are recorded on the tape. After
frequency) current. In conventional systems, the bias four seconds, the Il indicator lights up and the unit
current is susceptible to variations in certain recording enters the recording pause mode.
signals (see diagram below) which can cause fluctuations
in frequency response, distortion, or other unwanted 2
characteristics. Resume recording.
PAUSE
lt
High | |
4 Fluctuation
Output
Frequency — High
With the Dolby HX PRO system, the effective bias
amount added to the bias current is controlled in
millisecond units to greatly reduced distortion, improving
linearity in high-range response and ensuring high-
intensity recording with minimal distortion and noise.
To create a blank longer than four seconds
Press O) for the desired length of time. The indicator will
blink with greater rapidity after four seconds. When you
release the button, the unit goes into the recording pause
mode.
Press II to resume recording.
11
Timer-Activated Playback and
Recording Maintenance
By connecting an optional timer, recording or playback Cleaning the Heads and Tape Path
can be performed automatically at a preset time.
Clean all surfaces over which the tape travels after every
ten hours of operation to guard against:
— low-quality sound
— a decrease in sound level
— excessive wow, flutter or dropout
— incomplete erasure
— impairment of recording function
To obtain high-quality recorded sound, cleaning before
every recording is recommended.
a Capstan в
Recording
head
Erase Playback head
head Pinch roll
u inch roller
To a wall
outlet
1 Insert a cassette and prepare the unit for
. The cassette holder does not open unless the power is
playback or recording.
on.
For playback | Follow steps 1 through 3 on page 6.
1 Keeping the power on, turn the volume control on the
Close the holder completely.
amplifier to minimum.
For recording | Follow steps 1 through 5 on page 9. 2 Press £ to open the cassette holder.
3 Wipe the heads, the pinch rollers and the capstans
with a cotton swab slightly moistened with alcohol or
2 Set the timer to the desired time. commercially available cleaning fluid for tape decks.
Power to the unit will be cut off.
3 Set the unit’s TIMER switch to PLAY or REC.
Playback or recording will start at the preset time.
When the timer-activated operation is completed
Set the TIMER switch on the unit to OFF. If the TIMER
switch is left at REC, the unit will automatically enter the
recording mode the next time the power is turned on,
and the previously recorded material may be erased.
Keep the POWER switch on the unit ON
When the timer is set, the power to the unit will be cut
off. However, the POWER switch must be on to start
timer-activated operation.
12
Demagnetizing the Heads
After every 20 or 30 hours of use, or when you notice
hiss and/or loss of high frequencies, the residual
magnetism built up on the heads should be removed.
1 Keeping the power on, turn the volume control on the
amplifier to minimum.
2 Demagnetize the heads with any commercially
available demagnetizer.
Refer to the instruction manual of the demagnetizer for
detailed instructions.
Cleaning the Cabinet
Clean the cabinet, panel and controls with a soft cloth
slightly moistened with a mild detergent solution.
Important
Do not use any type of abrasive pad, scouring powder or
solvents such as alcohol or benzine.
Specifications
Recording system
Bias
Heads
Motors
Wow and flutter
4-track 2-channet stereo
AC bias
Erase head x 1 (S á F head)
Recording head x 1 (Permalloy head)
Playback head x 1 (Permalloy head)
Capstan motor x 1 (DC servo motor)
Reel motor x 1 (DC moton
0.05% WRMS (NAB)
Fast-forward and rewind time
Approx. 90 sec. (with C-60 cassette)
Frequency response (DOLBY NR, off)
Type IV cassette
(Sony METAL-ES)
20— 20,000 Hz (+3 dB)
20— 16,000 Hz (OVU recording)
Type It cassette
20 — 18,000 Hz (+3 dB)
(Sony UX-5)
Type | cassette 20— 17,000 Hz (+3 d8)
(Sony HF-S)
Signal-to-noise ratio (NAB, at peak level)
Dolby NR switch OFF B-TYPE | C-TYPE
Cassette ON ON
Type IV (Sony METAL-ES) 60 dB 67 dB 73 dB
Type || (Sony UX-S) 59 dB 66 dB 72 dB
Type | (Sony HF-S} 57 dB 64 dB 70 dB
Total harmonic distortion
Inputs
1.0% (with Sony METAL-ES
cassette}
Line inputs
(phono jacks)
Sensitivity 77.5 mV (-20 dB)
Input impedance | 50k ohms
Outputs
Line outputs
{phono jacks)
Rated output level | 0.44 Y (—5 dB) at a
load impedance
47k ohms
Load impedance Over 10k ohms
Headphones
{stereo phone jack)
0-25 mW at a load
impedance of 32
ohms
Output level
General
Power requirements
Power consumption
Dimensions
Weight
Supplied accessory
Optional accessory
120 V AC, 60 Hz
17 W
Approx. 430 x 123 x 285 mm (w/h/d)
(17 x 474 x 11Y, inches)
including projecting parts and controls
Approx. 4.9 kg (10 Ibs 13 02)
Audio connecting cord (2)
Wireless remote control unit RM-J701
Design and specifications subject to change without notice.
13
Troubleshooting Guide
The following trouble checks will help you correct the most common problems encountered with your tape deck. Should
any problems persist after you have made these checks, consult your nearest Sony dealer. Before proceeding with these
trouble checks, verify that:
* The power cord is firmly connected.
e Amplifier connections are firmly made.
* Heads, capstans and pinch rollers are clean.
* The amplifier controls and switches are set correctly.
Symptom Cause Remedy
The function buttons do not activate. | Cassette holder is not fully closed. Close the holder completely.
Cassette is not properly inserted. Insert cassette correctly.
The button pressed immediately after |Wait until the al indicator stops
the power was turned on. blinking.
Playback or recording begins when the [The TIMER switch is not set to OFF. [Set the TIMER switch to OFF.
power is turned on.
O button does not activate. No cassette in the holder. Insert a cassette.
(REC indicator does not light up.) Tab has been removed from the Cover the hole with plastic tape (page
cassette. 8).
Automatic shutoff mechanism Tape is slack. Take up the tape slack.
actvates before the tape comes to its Cassette shell is deformed. Use another cassette.
The Memory Play function is activated. | Press the MEMORY button to
deactivate the function.
Excessively loud tape transport noise [This noise is caused by the cassette
during fast winding. and does not signify a mechanical —
problem.
The cassette holder will not close. The power has been turned off while | Turn the power on. The cassette
the cassette holder is open. holder will close automatically.
14
Symptom
Cause
Remedy
Recording or playback cannot be
made or there is a decrease in sound
level.
Heads are either dirty or magnetized.
Clean or demagnetize the heads.
Improper connection.
Make connections properly (page 4).
Improper setting of the amplifier
controls.
Set the amplifier controls to the
appropriate positions.
Excessive wow, flutter or dropout.
Head, capstan or pinch roller is dirty.
Clean in accordance with instructions
shown on page 12.
Incomplete erasure.
Erase head is dirty.
Clean the erase head.
Increased noise or poor reproduction
in high frequencies.
Head is magnetized.
Demagnetize the head.
Unbalanced tone in high frequencies.
Improper setting of the DOLBY NR
switch.
During playing back, set the switch to
the same position used in recording.
The unit is placed near a television
set.
Move the unit away from the television
set.
The desired selection cannot be
located even though you activate the
AMS.
There is noise in the space between
selections.
The space is less than 4 seconds long.
Rerecord the tape if you can, and
insert a blank space of four seconds
using the O button.
The pe or << button was pressed
immediately before or after the
beginning of the following selection.
Playback may begin In the middle of
the selection when the AMS is
activated.
The selection contains one of the
following:
— a long pause in the music
— a passage of low frequencies or
very low volume
— a gradual increase or decrease in
volume
While the tape is playing, press the
p>» or << button again.
Symptom |
Cause
Remedy
Hum noise.
The unit is stacked on or under the
amplifier.
Separate the unit.
Noise is recorded.
Recording was made near equipment
such as a television set or a color
monitor, and interference has affected
the recording on the tape and the
Dolby NR system.
Move the unit away from the television
set or color monitor.
15