Text preview for : FW5xx & FW7xx Hum.pdf part of Philips FW5xx & FW7xx Hum Philips Symptom Cure 2001-02 SymptomCure references FW5xx & FW7xx Hum.pdf
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TYPENUMBERS: FW545C, FW540C, FW548C, FW548V, FW555C, FW585C, FW590C, FW595C,
FW748P, FW768P, FW798W
SYMPTOM: IRIS Code: 114X
Digital hum (whistling tone) audible from the Display in quite environment.
CAUSE: The source of the noise comes from the filtering SMD capacitors 2483 - 2486 for
the FTD Display supply -F1 & -F2.
CURE: The problem is resolved by adding 2 elcos 4,7