Philips CD 781 - Manual (Page 8)

PLAYER MAINTENANCE
A chamois leather slightly moistened with water is
sufficient for cleaning the piayer. Do not use clean­
ing agents containing alcohol, spirits, ammonia or
abrasives.
The disc tray should be kept free of dust with a dry
cloth.____________________________________
TECHNICAL DATA
Typical Audio Performance
Frequency range: 2-20,000 Hz
Amplitude linearity; ±0.1 dB (20-20,000 Hz)
Phase linearity: ±0.5° (20-20,000 Hz)
Dynamic range; >96 dB (20-20,000 Hz)
Signal-to-noise ratio: > 100 dB (20-20,000 Hz)
Channel separation: 96 dB (1 kHz)
Total harmonic distortion; 0.025% (1 kHz)
Wow and flutter: quartz crystal precision
DM conversion: quadruple oversampling
(176.4 kHz) with digital filterand two 16-bit D/A-con-
verters
Audio output level: 2 Vm,s
Impedance PHONES socket; 8-1000 ohms
Power supply
Mains voltage and frequency; see the type plate on
the rear of the player
Power consumption: 15 W approx.
Safety requirements: lEC
Cabinet
Material/finish: metal and polystyrene with decora­
tive trim
Dimensions (w x h x d) : 360 x 81 x 300 mm
Weight: 3.5 kg approx.
FAULTS AND THEIR LIKELY CAUSES
insufficient familiarity with the combination of a new
product and new discs may lead to faults arising
during use. These are generally caused by simple
errors in operation or external factors.
It is perhaps useful to check the points listed below
and where possible remedy these before taking
your player for repair.
- The transit clamps have not been removed.
- Condensation has formed on the lens of laser
duetoadramaticchangeintemperature.Thiswill
disappear automatically after a some time.
- There is a foreign object in the disc tray.
- The disc has not been inserted with the printed
side up or there is no disc in the tray.
- The disc is dirty, badly scratched or warped.
- The player has been connected to the PHONO
socket of the amplifier.
if the fault remains, try to clear it by switching the
player off and on.
If this also fails to help, do not continue experiment­
ing, but remove the plug from the socket and
consult your dealer.
Certain faults may be caused by a disc. In order to
help determine the precise cause, take the disc with
which the fault occurred with you when you take the
player for repair.
Under no circumstances should you repair the
player yourself, as this will invalidate the guaran­
tee!
Subject to modification
This Compact Disc player complies with radio
interference requirements as laid down in EC
regulations.