Question about JVC SR-DVM700 DVD Recorder/HDD Recorder
Did you replace ALL the electrolytic capacitors in the power supply? Generally, whenever there are several faulty components in this part of any circuit, it is a good idea to replace all of the caps as well as checking for leaky diodes and faulty IC regulators.
My guess is that the SMPS still has an intermittent partial fault, which is preventing the unit from staying on. I would recommend that you check the ICs in that circuit, replace as required (if you haven't already done so). These can be 3-pin or 5-pin regulators, but they are voltage rated, so obtain the correct types for this model if you do decide to replace them.
I hope the fault hasn't spread to the microprocessor on the main board - this can be expensive to replace if faulty. I would recommend that you re-check the power supply again - thoroughly. Touch up potential dry solder joints if necessary.
If the unit still misbehaves after all of this; perhaps it's time to consider submitting it to a workshop, get a quote (and a second opinion) on the likely cost(s) of repairs, then you can make a decision afterwards as to whether or not you wish to go ahead and get this fixed for good. It's up to you.
Posted on Mar 11, 2011
Testimonial: "Hi, Thanks for your reply email. It did encourage me to go back and replace two electrolytic caps that I had checked with a capacitance meter. "
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Posted on Jan 02, 2017
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