Question about Kenwood KRF-V5100D
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Posted on Jan 02, 2017
The problem is not likely to be the switch itself. The unit is rpobably going into "protect" mode because of a problem internally. Try removing all the cables and try to turn on the unit. If the behavior remains the same, the output section requires repair. The most common failure is the output transistors. Expect a parts cost in the $40-$60 range.
Posted on Dec 09, 2009
it is possible that the voltage to the filament of the display is absent. This is normally a 3.6 volt AC which comes from the transformer and it can be lost a the connectors or the circuit board. It will be best to use a multimeter to trace the voltage to the display unit. check the voltage to the display driver IC, check the negative grid voltage to the display , if there is an open resisitor of the feed to the display voltage to the IC. Finally check the continuity of the filament of the display unit.
The driver IC is also a suspect , sumulate heat and see if the fault comes up easily which can confirm the case.
Posted on Sep 05, 2011
This unit is in what is called "protect" mode/ See the link below for an explanation of this. Specifically to your unit, the output components are unique to Kenwood and are not cheap. Further investigation to locate the reason for the protect mode will be necessary prior to any attempt to estimate the cost of repair. Something as simple as a missign voltage can cause this symptom.
Please feel free to update this with any other questions or concerns that you may have.
Posted on Oct 21, 2011
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