Troubleshooting Guide - Sony XR-4890 Operating Instructions Manual

Troubleshooting guide

The following checklist will help you remedy the problems you may encounter with your unit.
Before going through the checklist below, check the connections and operating procedures.
General
Problem
No sound.
The contents of the memory
have been erased.
Indications do not appear in the
display.
Tape playback
Problem
The sound is distorted.
The AMS does not operate
correctly.
Radio reception
Problem
Preset tuning is not possible.
Automatic tuning is not
possible.
The "ST" indication flashes.
22
Cause/Solution
•Cancel the ATT function.
•Set the fader control to the centre position for two-speaker
systems.
•Rotate the dial clockwise to adjust the volume.
• The power cord or battery has been disconnected.
• The reset button was pressed.
n Store again into the memory.
Remove the front panel and clean the connectors. See
"Cleaning the connectors" (page 20) for details.
Cause/Solution
The tape head is contaminated.
n Clean the head with a commercially available dry-type
cleaning cassette.
There is noise in the space between tracks.
A blank space is too short (less than four seconds).
The SEEK/AMS control was pushed up immediately before
the following track.
The SEEK/AMS control was pushed down immediately after
the track starts.
A long pause, or a passage of low frequencies or very low
sound level is treated as a blank space.
Cause/Solution
• Memorize the correct frequency.
• The broadcast signal is too weak.
The broadcast signal is too weak.
n Use manual tuning.
•Tune in the frequency accurately.
•The broadcast signal is too weak.
n Set to MONO mode (page 8).