Sony WRT-847A, Service Manual

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2-5
WRT-847A/847B
2-3. Error Messages
When a problem occurs, one of the following error messages may appear on the display.
Messages Contents Measures
Error 11 An error occurred in backup memory data. The data was initialized. Set the transmitting channel frequency,
the audio gain level, the compander time constant and RF output
power again.
Error 21 The PLL synthesized circuit is in trouble Check the PLL synthesized circuit (IC402, CP401, and its peripheral
circuit) on MB-914 board.
Error 31 The battery voltage exceeds the allowable value. Don't exceed 4.2 V.
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