DP405 Service Manual
called radio cannot
hear anything
B．The microphone is broken. Change to a new one.
6 The green indicator
glows when receiving,
but no sound is
received
A．The speaker is broken. Change to a new one.
B．The audio power amplifier U3 is broken. Change to a new IC.
C．Th switch tube Q602 Q603 is broken. Change to a new one.
7 Failed to write the
programming data
A．Worng cable connection. Check the connetion
B．The programming drive is not well installed. Re-install the driver.
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