Question about JVC TH-S5 System

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PSU problem The unit will not swich on, when power is connected to the dvd/tuner unit the switch-mode power supply can be heard cycling on and off at a rate of approx 2 cycles per second. Is this a known fault? If so, is it the psu or something dragging the output from the psu down.

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  • kiz1 Mar 28, 2008

    I have fixed the power supply fault on my th-s5. In case you have a similar problem I changed the main smoothing capacitor 68uf 400volt and the only other electrolytic capacitor in the oscillator section ie. 39uf 25volt Now up and running again.

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The most likely problem is something dragging down the power. There could be a problem within the power supply as well. This is a "switch mode" power supply. That means that if the primary side does not oscillate correctly, you will get this cycling as well. These are hard to diagnose remotely. Typical power problems such as this run about $15 or so for parts plus the local labor rate if it is within the power supply. The parts cost will rise to the $30-$50 range if the output amp section is the problem.
Dan

Posted on Mar 28, 2008

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Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

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Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

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make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error hope this helps

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Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

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Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

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Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

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Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

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Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

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make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error

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Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them there probably old and faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error

hope this will help
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Hello there bakers_girl2.

Here's your GEEK-steer ...

If it's occurring during "power saving mode" also as you say, it's likely drive replacement time. But let's not be hasty. Perform the following:
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  3. Unplug power cord from PC's PSU.
  4. Wait 5 minutes.
  5. Open case to gain access to the problem drive.
  6. Prior to touching ANYTHING inside the case, touch any metal part of the case-frame to rid yourself of any built-up static-electricity.
  7. Disconnect the ATA cable from the back of the problem drive (but leave the power cable connected).
  8. Reconnect power cord to PC's PSU.
  9. Turn case PC's power supply unit (PSU) switch back on.
  10. Reboot.
If it still occurs:
  • You now know the problem is isolated to the drive itself.
  • It could be, the eject button's gunked up. In which case you might try a shot of silicone spray on it, then work it in by pushing it several times.
  • if under warranty, return it as it's repair/replacement time.
If not:
  • Something software related is likely sending hokey-pokey commands.
  • Reboot system into Windows "Safe Mode".
  • If it stops occurring, you know it's a non-Windows application (software) process that's likely the culprit, which means it's time to play "process of elimination" to isolate which one. Getting SysInternals "AutoRuns" and "Process Explorer" can come in handy with this chore.
Good luck, and please do post back to ...
  • to let me (and interested others) know how things worked out,
  • to provide clarification or feedback.
  • if you have any further questions,
"Today's the best day of my life ... and NOW you're part of it!"
Via-con-Dios and Godspeed -- Geekinator (aka Craig).

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