Maintenance; Troubleshooting - JVC TD-V661 Instructions Manual

MAINTENANCE TROUBLESHOOTING
The importance of cleaning
When the tape is moving, magnetic powder and dust naturally
accumulate on the heads, capstan and pinch roller. When they
become too dirty,
• tone quality deteriorates.
• the output sound level drops.
• the previous sound is not erased satisfactorily.
• recordings are not satisfactory.
Because of this, clean the heads, etc. every 10 hours of use so
that optimum recordings will be made.
Cleaning the heads, pinch roller and capstan
Wipe the heads, the capstan, etc. with a cotton swab with its tip
dipped in alcohol.
For effective cleaning, use a cleaning kit available from your
audio store. After cleaning, be sure that the cleaning fluid has
completely dried before loading a cassette.
Record head
Cotton swab
Erase head Play head
Capstan
Pinch roller
Demagnetizing the heads
Magnetic objects brought close to the head or using the deck for
a long period of time, results in magnetization of the head, thus
noise occurs. When the noise is excessive, high frequencies on
the recorded tape may be erased.
Demagnetize the heads and other metal parts that come into
contact with the tape every 20-30 hours of use wifh a head
demagnetizer (available from your audio store).
(When demagnetizing the heads, be sure to set the POWER
switch to STANDBY).
Regarding the use of a demagnetizer, see its instructions.
|1 lU— Head demagnetizer
What appears to be trouble is not always real trouble. Make
sure first....
1. Playback (recording) starts immediately after the power
cord is plugged in.
• Is the TIMER switch set to PLAY (REC)?
If so, set the switch to OFF when not performing timer
playback (recording).
2. Recording cannot be performed.
• Are the safety tabs of cassette tape broken?
If so, replace the cassette with a new one, or when the
recording can be erased, cover the safety tab slots with
adhesive tape.
• Does the CD DIRECT switch setting correspond to the
input?
If not, press the switch to select the source from which you
want to record.
3. Tape runs, but no sound is heard.
• Are the cords connected correctly?
If not, insert again securely.
• Is the remote cable disconnected?
If so, connect it correctly.
• Is the VOLUME control of the stereo amplifier set to MIN?
If it is, adjust the control to an appropriate volume.
4. MUSIC SCAN operation does not function properly.
• Are the non-recorded sections too short (3 sec. or less), or
do they contain high level noise or hum?
If so, replace the cassette.
5. Sound is too low, unstable or broken.
• Are the heads, pinch roller and capstan dirty?
If so, clean them.
6. Hiss noise is heard, and high-frequencies are attenuated.
• Is the record/playback head magnetized?
If so, demagnetize it.
7. Previously recording is not completely erased.
• Is the erase head dirty?
If so, clean it.
8. Sound quality is poor (with no high frequency sound).
• Is the DOLBY NR switch set to the right position?
If nof, playback after setting it to the mode used when
recorded.
9. Hum noise is heard.
• Is the deck directly on , under or on both sides an amplifier?
If so, move it away from the amplifier.
10. Automatic power ON/OFF (STANDBY) system does not
function.
• Is the power cord of deck connected to the SWITCHED AC
OUTLET of an amplifier or receiver?
If so, connect it correctly.