Maintenance; Specifications; Compact Disc Player - Sharp QT-CD180W Operation Manual

Maintenance

Cleaning the lens and tape-handling parts
Do not touch the laser pickup lens. If fingerprints or dust accumulate
on the pickup, clean it gently with a dry cotton swab.
Dirty heads, capstan or pinch roller can cause poor sound and tape
jams. Clean these parts with a cotton swab moistened with commer-
cial head/pinch roller cleaner or isopropyl alcohol.
After long use, the deck's heads and capstan may become magnet-
ised, causing poor sound. Demagnetise these parts once every 30
hours of playing/recording by using a commercial tape head
demagnetiser. Read the demagnetiser's instructions carefully before
use.
A
A Laser pickup lens B Pinch roller
D Recording/Playback head E Erase head
Cleaning the cabinet
Periodically wipe the cabinet with a soft cloth and a diluted soap solution,
then wipe with a dry cloth.
Caution:
Do not use chemicals for cleaning (petrol, paint thinner, etc.).
lt may damage the cabinet finish.
Do not apply oil to the inside of the unit.
lt may cause malfunctions.
Condensation
Sudden temperature changes, storage or operation in an extremely hu-
mid environment may cause condensation inside the cabinet (CD pickup,
tape heads, etc.).
Condensation can cause the unit to malfunction.
If this happens, leave the power on with no disc (or cassette) in the unit
until normal playback is possible (about 1 hour).
B C D E
C Capstan

Specifications

SHARP reserves the right to make design and specification changes for
product improvement without prior notice.
General
Power source AC110-127/220-240V, 50/60 Hz
DC 9 V ["D" size (UM/SUM-1, R20 or HP-2) battery x 6]
Power consumption 13 W
Output power MPO: 8.4 W (4.2W + 4.2W)
(AC operation, 10% T.H.D)
RMS: 4.6 W (2.3W + 2.3W)
(DC operation, 10% T.H.D)
Speakers 8 cm (3-1/8") full-range speaker x 2
Dimensions Width: 376 mm (14-3/4")
Height: 150 mm (5-7/8")
Depth: 230 mm (9")
Weight 2.6 kg (5.8 lbs.) without batteries

Compact disc player

Compact disc
Type
Signal readout Non-contact, 3-beam semiconductor laser pickup
Audio channels 2
8-time over sampling digital filter
Filter
D/A converter 1-bit D/A converter
Unmeasurable (less than 0.001% W. peak)
Wow and flutter
Radio
Frequency range
FM: 88 - 108 MHz
AM: 526.5 - 1,606.5 kHz
Tape recorder
Frequency response 50 - 14,000 Hz (Normal tape)
Signal/noise ratio 50 dB
Wow and flutter 0.25 % (WRMS)
Motor DC 9 V electric governor
Bias system AC bias
Erase system Magnet erase
E-8