Kenwood KRC-609 - Manual (Page 29)

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What might seem to be a malfunction in your unit may just be the result of slight misoperation or miswiring.
Before calling service, first check the following table for possible problems.
Troubleshooting Guide
SOLUTION POSSIBLE CAUSE PROBLEM
Nothing happens when the
buttons are pressed. The computer chip in the unit is not functioning normally. Press the reset button on the unit (see p. 4).
The antenna control wire is not connected. Connect the wire correctly, referring to the section on
"Connecting Wires to Terminals".
Radio reception is poor. The car antenna is not extended. Pull the antenna out all the way.
The power does not turn on. The fuse has blown. After checking for short circuits in the wires, replace the
fuse with one with the same rating.
The memory is erased when
the ignition is turned off. The battery wire has not been connected to the proper
terminal. Connect the wire correctly, referring to the section on
"Connecting Wires to Terminals".
Connect the wire correctly, referring to the section on
"Connecting Wires to Terminals". The ignition and battery wire are incorrectly connected.
Free switching of the sound
quality. The system Q function is set on Scan mode. Refer to the “System Q” page and switch it to a
function other than Scan mode. (see p. 6).
Audio control setting cannot be
achieved. The system Q function is set on Scan mode. Refer to the “System Q” page and switch it to a
function other than Scan mode.(see p. 6).
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