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70 Audio-Video Receiver KRF-X9992D
Troubleshooting
Chapter Three: Troubleshooting
Troubleshooting is how you determine what part of a complex
system (like a home theater system) is at fault when the system
isn’t working how you think it should. When you troubleshoot a
system, you diagnose a problem by examining and eliminating
possible causes until there’s only one left. Troubleshooting is
easiest when you start with the most obvious, most common,
and most likely and work from there.
Diagnosing your own problems can save you time and aggrava-
tion—the better you understand how to troubleshoot and adjust
your own system, the less time you have to:
• spend on the phone with a customer service representative
• do without your receiver because it’s “in the shop”
There are some basic steps to good troubleshooting:
1. Verify the exact conditions when the problem occurs.
This is the most important step in troubleshooting. Whether
you fix it yourself or have to describe it to a technician, you are
much more likely to really solve the problem if you know the
exact circumstances surrounding the problem. For example, if
you don’t hear anything through the speakers, it’s useful to
know if it only happens when you are listening to CDs.
Knowing that eliminates the speakers themselves as part of the
problem. The more you know about when a problem occurs,
the more likely it is that you or the technician can solve it.
2. Check each part of the signal’s path from source (such
as a CD player) to speaker.
You may also want to test the assumptions you made in step
1: maybe you haven’t listened to your MD recorder in a
while— is there no sound from it as well? This step will really
help narrow down the possible causes. Test all your con-
nected devices and eliminate the ones where the problem
doesn’t occur. When you’re done with this step, you’ll