Read Harman Kardon HD 720 (serv.man3) User Guide / Operation Manual online
Troubleshooting
15
SYMPTOM
No lights on Front Panel
Remote does not appear
to operate
to operate
Front panel lights, but CD
does not play
does not play
Play indicator lights, but
no sound is heard
no sound is heard
Sound skips or stutters
during play
during play
Sound is continually distorted
CAUSE
• No AC power
• Main Power Switch turned off
• Weak batteries
• Blocked sensor
• Weak batteries
• Blocked sensor
• Disc upside down
•Poor connections
• Wrong source connected
• Disc may be damaged
• Surface vibrations
• Surface vibrations
• Incorrect input
SOLUTION
• Make certain AC power cord is plugged into
a live outlet.
• Turn on Main Power Switch.
• Install fresh batteries, observing polarity indications.
• Remove obstructions from the front panel sensor or
• Install fresh batteries, observing polarity indications.
• Remove obstructions from the front panel sensor or
connect a remote sensor to the
Remote In
jack
on the rear panel.
• Reload disc with label side facing up.
• Make certain connections are secure and made
to the correct (e.g.,
CD
) input.
• Select CD source on receiver or preamp.
• Try another disc.
• Isolate the unit from vibration by placing it on a
• Isolate the unit from vibration by placing it on a
firm surface or move it further away from speakers.
• Make certain that the HD720 is connected to a line-
level audio input, NOT a digital audio or phono input.
Troubleshooting Guide
ENGLISH
35620_HD720 Eng 18/08/98 20:36 Side 15
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