Question about Panasonic SC-HT1500 System

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Power up my machine will not power up the power light just keeps flashing

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  • solo2525 Dec 03, 2007

    for my panasonic sc-ht1500

  • naed70 Dec 11, 2007

    That's funny, mine does the same thing almost to the same date. It was making a hissing sound when powered off then two days later the power light just flashes and can't be powered on.

  • rekoj Dec 17, 2007

    I have the same problem. After approx. 2 years, it does not power on, just red blinking on power button. I called Panasonic support, and they gave me address to the next service center to service the main unit.

    I searched at www.afterdawn.com, and I think there is a problem with capacitors. Maybe, I will open the unit, and check for blown capacitors.

  • frodrieu May 25, 2008

    the power of light flashes and you hear a noise and not turn

  • Anonymous Jan 11, 2009

    Same problem, I noticed a quite hum from the main unit only when off, next morning, flashing power light and audible noise timed with light on/off. I first took apart the sub, because of previous mouse damage, and eventually disassembled the main unit to find two bulged capacitors. Replaced with some spares (from broken hitachi dvd player) 10v 1000mf for both. Works great!

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I followed instructions posted at
http://vassfamily.net/projects/DMRE85H/dmre85h.html
and I opened the unit.
I unscrewed 3 black screw on back, removed two side covers, then I unscrewed 4 silver screws (2 & 2) on both sides and removed the top cover. Then I unscrewed 4 screws (those four screws that hold the silver hlder on the board - they are down, so you need to use long screwdriver.
Carefully moving & holding HDD in the silver holder (moving it only little bit up from the board to see underneath on the board), and I was able to see 2 blown capacitors (with brown stain on top). They are C1261 & C1260 caps - ELNA 680uF RJF 10V.
I did not attempt to remove silver holder with HDD totally now.
In reverse order, I screwed everything back.
I ordered parts at www.panasonic.com support page for model SC-HT1500, then choosing SA-HT1500 - Main Unit. I found those 2 same capacitors; they cost $1.89 each. Shipping & tax came higher than price of parts. I
I already have soldering iron, and I will try to replace blown capacitors by myself after receiving ordered parts.
I will post my next message after receiving parts - approx. in a week or so.

Posted on Dec 17, 2007

  • rekoj Jan 09, 2008

    I received replacement parts from Panasonic in couple days after I ordered them.

    Finally, I had time to open the unit. Actually, I removed only HDD (together with silver holder); it requires to unscrew 5 screws and one connection from HDD. Remember connections to HDD!!! Then, I removed the silver cover next to HDD.

    I did not removed DVD drive as it was written in instructions at http://vassfamily.net/projects/DMRE85H/d...



    I unscrewed screw holding AC connection at the back of the panel. I folded the circuit (board) partially; I was not able to folded as shown in the picture.

    I removed bad capacitors - gently prying them out (one at the time) with small screwdriver while melting the bottom soldered connection. I cut capacotirs to size as the bad ones (using scissors), soldered new capacitors to places - matching - and + polarity. It is good to make a picture of bad capacitor before removing to know where "0" on capacitor should be after replacement. I connected my DVD recorder, turned it on. It powered up, went through "Please Wait," then "SELF CHECK", and woolaa!!! my DVD recorder works great - as new. The contents of the HDD is there.

  • rekoj Jun 04, 2009

    passivex,

    do not fool around with upgrading HDD. While it is really tempting idea, it will not actually not work in Panasonic dvd recorders. These dvd recorders has software/firmware that will format every HDD (even higher than 80GB that you have now) to 80GB maximum.

    And with HDD swapp (old HDD out and new HDD in, and then going back to old HDD, etc.) you will loose all the contents recorderd on the factory installed HDD. Panasonic will force you to format your HDD everytime when you do a HDD swap.

    There is good news. When your factory installed HHD dies, you can buy any internal HDD with the same specifics, and swap it (saving $300 plus tax & shipping for a genuine HDD replacement ordered at Panasonic part website.)

    I know that some people were able to upgrade HDD in Pioneer models of dvd recorders, but it is not just "unplug, plug, and play" matter. You need to have a special service disk and a service manual, usually approx. $70 investment.

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Kudos to the person who posted the circuit board location and capacitor values of C1260, C1261, & C1262. My problem sounded exactly as described by the others in this post including the hissing (almost a squealing sound...in fact I thought it might be the drive beginning to fail, but alas it was not) before the final failure which resulted in the power light flashing on and off. I ordered the parts from Digi-Key without even opening the unit to confirm that my 3 caps had indeed failed. When the parts arrived, I opened the unit, went straight to the board under the HDD, and sure enough, those 3 caps had all leaked. With new parts already in hand, the fix took 10 mins to replace the 3 caps and seal up the unit. It powered up perfectly and is back in service! Total cost of repair was less the $4 including shipping. The DigiKey P/Ns are: 493-1494-ND (680uF 10v), and 493-1527-ND (1000uF, 16v). Note that the 1000uF that I pulled out of my unit was rated at 10v, so the 16v replacement should have a longer life. Thanks again to those that posted this fix!

Posted on Jul 18, 2009

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At first teh red llight would come on then, some quirky soft chirping\squeeky sound on SA HT1500. I first thought it was the horizontal transistor, then when I later read about the capacitors, I was certain teh capaciotors were dead. The C1261 & C1260 caps had a slight brownish excretion.
Repair was done to are C1261 & C1260 caps and then it booted straight up without any issues.
I bought my caps from R.S. and the vertical type. Thanks to all who contributed.

Posted on Sep 15, 2008

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Anyone know about the "Please Wait" error. Won't boot past that. ht1500

Posted on Dec 14, 2009

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I made this repair on my unit with 2 new capacitors. However, I had to bend the multipin jumper thing so I was afraid it would break if I keep moving the daughter board so, after replacing the first capacitor, I tested the unit, it worked so I put everything back without replacing the second cap. Well...everything works except the TVG feature. I redid the whole TVG setup but it still got no programming info. Not sure if this is related to the capacitor I didn't replace or not (hopefully not).

I'm thinking of opening it up again to replace the other cap. I was thinking of upgrading the HD while I have the chassis opened. Does anybody have experience with this? It's just a regular 3.5" HD. I imagine that, if you clone the drive, things should be OK but not sure what to expect. Has anybody done this?

Posted on Jul 26, 2008

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Found this as a reply elsewhere on the net:

Re: DVR whined, wouldn't stay turned *off*, now won't boot
A followup: the DVR is now repaired. The problem was 3 bad radial-type capacitors in the power supply (which explains the three stages of the failure). The repair company gave us the old caps, which were made by Elna. All three have clearly leaked out the top.

IMO they overcharged us a bit for the replacement capacitors ($6 each for two 16V/680uF caps [online catalog price $2.10], $9 for a 16V 1000uF one [online price $1!]). It incurred the minimum labor charge of $100. But the repair was done fairly quickly and the unit is working again, so we're happy.

Seems like they talk about the same 2 680uF caps along with a 1000uF cap.

Will have to try the repair after the holiday weekend after I get parts.

Posted on Mar 23, 2008

  • Techniwizard Mar 25, 2008

    OK, opened her up and the already noted 2 caps 680uf @ 10V, C1260 and C1261 showed signs of bulging out of their tops.

    C1262 is a 1000uf @ 10V on the same line after a decoupling coil.



    I replaced all 3 with 1000uf @ 16V units, powered up and all is well. The board was removed for more than 24 hours but I was shocked to find most of the TV Guide listings and my Scheduled Recordings still in memory along with all of the video on the HDD intact, so go figure.



    Also as noted, the DVD drive and front panel do not need to be removed as in the "Vass" procedure. The multi-pin jumpers from the mian board to the PS board can be disconnected on the PS side by lifting on "ears" of the upper part of the connectors with a fingernail. Do this slowly to not misalign the pins. This allows you to work on the caps with the board out of the unit on a workbench where you can see what you are doing.



    Keep track of the different screws as you remove them, some are machine type while others are self-tapping and can be easily mixed up.



    Thanks to those that first explored this problem. Reapirs are always easier when the diagnosis is already made.



    T Wiz

  • Techniwizard Jul 09, 2014

    Bad PS revisited.

    Following my 208 repair, I find that this repair needs to be done again. Probably the same or even more Caps have dried out and/or leaked. I should have used higher quality replacement Caps in the beginning, so lesson learned.

    I no longer use this piece as regularly as before the age of DVRs, WinTV, and other computer based recording systems.

    But I will get to this repair sooner or later just to prove it is the same Cap problem. I may get original Panasonic parts this time and will check Digi-Key as they are an Authorized Panasonic Parts distributor for better pricing.

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