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protection

  1. QSilver

    SA-8800 Oscillation?

    Went to switch it on today and it took longer than usual to come out of protection. Then I heard a slight crackling noise from inside the amp. Turned it off, and smoke came out from the front right corner of the amp. Damn. So I took it to the bench. R80 had burned up. I changed it and replaced...
  2. S

    Advent 300 - help diagnosing a short

    Hoping maybe some of the wonderful techs around here can help me out. I have an Advent 300 receiver. I performed a full recap (all electrolytic caps replaced as well as tantalum caps) per the David Reaton website. After recap, amp was brought up on dim bulb tester. Amp was working fine. DC...
  3. QSilver

    Pioneer A-80 over current protection

    I got it this week and at first it worked well. DC offset is 4mV on one side and 14mV on the other. I checked and set the idle current to 22mV as per the manual. But Then it started going into protection. I checked the idle current and dc offset and it was still ok, so I changed the capacitors...
  4. RR--

    Recapped Sansui AU-719 Protection mode help!

    Hey everyone! long time since I've been here but I recently came into a problem depriving me of my favourite Sansui. Back in 2013 I recapped my Sansui AU-719 with all new Nichicon, Panasonic and Gold Tune caps. I also replaced the main fuse for the Australian 240V system. Original post here...
  5. K

    Any treatment to rubber surround ?

    Hi, I was thinking about to apply something to the rubber surround for protection. My speakers are Tannoy's Autograph mini and they sound really great. The rubber surround looks ok but I afraid it might get "dry" or oxidized later, especially when there is no original replacement from the...
    • kl122002
    • Thread
    • oxidize protection rubber surround
    • Replies: 15
    • Forum: Speakers
  6. samc777

    SX-1980 is in protection when first switched on

    A couple of years ago I picked up a SX-1980 in rather rough shape. To be brief the Power Supply Board AWR-154 was almost unrepairable for a rookie like me so it was placed in the back closet and left for another day. Then txturbo came along with his new board so I took the easy way out and...
  7. K

    SX-950 lights working, but no sound, and no relay click. Preamp works and voltages are all good.

    I know there a lot of similar posts and I've read through many of them, but I still can't figure out the problem. When I turn on the unit the relay never switches on and no sound will come out. I checked the pre-amp with a separate amplifier and it is producing good sound. I've checked all the...
    • kevdubs
    • Thread
    • no sound pioneer protection relay sx-950
    • Replies: 10
    • Forum: Pioneer Audio
  8. QSilver

    SA-9100 Protection releasing too soon.

    I've been going through a very abused SA-9100. To cut a long story short, I looked through a number of threads dealing with them and rebuilt the power supply and all the other boards, powered on and everything is great except for this one problem. I read that the protection shouldn't disengage...
  9. QSilver

    A-60 protection circuit fault?

    I got one an A-60 pretty cheap the other day, a bit ruffed up but salvagable. I think it has been a little wet at some stage as there is a bit of rust and some resistors were rusting on their legs. I've replaced the bad looking resistors and powered it on with DBT. All is well and the DBT goes...
    • QSilver
    • Thread
    • a-60 dynamic power non-switching pioneer protection
    • Replies: 40
    • Forum: Pioneer Audio
  10. Johnny_Law

    Kenwood KR-7200 won't come out of protection

    I think I've narrowed it down to Qe13 on the main amp board but I wanted to run it by those with more experience before I figure out the replacement. (If I'm placing an order from Mouser I'll probably replace the others too because why not ... ) I've referenced a couple threads in the course...
  11. Pioneer!

    Budget (but quality) power conditioner, surge suppressors?

    I haven't really experienced any issues in the past with surges or anything, but I was considering making an upgrade to my protection for my system, plus possibly throwing in line conditioning as well. I currently do own a power conditioner, but I am using it for my home theater system. It's a...
  12. oz-2

    SA9500 intermittent protection issue

    Dear AK'ers I wonder whether anyone could give me some advice on how to fault find an intermittent protection issue on an SA9500 (mk1)? I will be very grateful for the usual excellent advice and help. Just to give background. The amp has been professionally recapped. I splashed out a couple...
    • oz-2
    • Thread
    • intermittent protection sa9500
    • Replies: 11
    • Forum: Pioneer Audio
  13. wparker1934

    9090 Amp Section Fiasco

    Hey all, I'm about at wits end with my 9090. The set is coming out of protection mode, but the sound is incredibly distorted on each channel and not reaching higher volume levels-- on both the speakers and headphones. All of the power transistors are new equivalents. The driver board, to my...
  14. fucanay

    SX-828, won't come out of protection.

    I picked up a SX-828 recently and it's in great physical shape. Electronically, not so much. It will not come out of protection. Since there was no reason to not have the caps updated, I've recapped the power supply and the Main Amp, both read close to the same as they did before the recap. I've...
  15. J

    Need help! Pioneer SA-8100 Protection Issue

    Here's a short video that captures the whole issue: In words Amp "protection" is turning on when settings are adjusted and blocking amp from putting out signal Amp doesn't seem to be receiving any signals I recently recapped the amp to try and fix the issue - did not fix issue
    • jbjaxxon
    • Thread
    • help pioneer protection
    • Replies: 1
    • Forum: DIY
  16. J

    Sansui AU517 Protection/Tone Control Board Troubleshooting

    Hi, So I'm onto my second AU517 refurb. project. The amp was all original when I bought i, but would not come out of protection. The light would just blink forever. Regretfully, I didn't do much trouble shooting before I dove in for a full electrolytic recap, fusible resistor, VD1212 diode over...
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