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  1. I

    SX1050 No Power

    Hi all, please forgive me if this is a topic widely discussed somewhere I can't find, but I've been doing a recap and restore of an SX1050 and all was good until I replaced the power transistors with the wrong thermal paste (it was conducive and messy). The fuse blew and I accidentally replaced...
  2. S

    Please help! I screwed up SA7500

    I have recapped most of this amp now and changed all the transistors. There was a ridiculous comedy of erros on my part when testing after getting the relay clicking on, which I will not go into because it makes me mad when I think about it, lol. The big booboo I made was installing a cap...
  3. Sergimm

    Sparks and a volatilized transistor

    I'm an idiot. I was trying to adjust the idle current for my Marantz 1050 after a full recap. But I slipped and I managed to short a collector leg of the 2SB686 transistor with the metal bar that holds the 4 transistors to the heat-sink. It cracked, sparked, it even dented the metal bar, and the...
  4. NickDeO

    SX-680 Restoration Troubles

    Hello, AK! Recently, I picked up a Pioneer SX-680 for $30. The guy I bought it from claimed that no sound came out due to a cracked PCB. Nice guy he was, he was even willing to open the thing up in his kitchen to show me where it was. I've since glued the cracked board and repaired the...
    • NickDeO
    • Thread
    • buzzing hum humming pioneer repair short shorted sx-680 troubleshooting
    • Replies: 80
    • Forum: Pioneer Audio
  5. Gangmania

    akai gx-620, shorted, need help/assistence

    Hello, I was changing the TIP47 on my akai gx-620 (power off) But when i wanted to use the multimeter with power on, I accidentally had the power switch come into contact with the housing. Then everything fell silent and the T5 fuse blown. I inserted new ones and every time I power it, it burns...
    • Gangmania
    • Thread
    • akai fuse shorted
    • Replies: 7
    • Forum: Tape
  6. G

    SX-850 failing DBT and no relay click after work on Power Amp

    Hello Everyone, continuing work on the SX-850. I rebuilt the power supply and updated caps and transistors on Protection circuit and EQ board, was working fine after that. I then swapped out the electrolytics and transistors (other than the output transistors attached to heatsink) on the power...
  7. Mike Sweeney

    Finally!! Found the intermittent short on my 2230B

    So when I was working on the bottom side, I snipped off some of the old vinyl ties to work on the boards. All of sudden my sound goes completely away. I worked out that I had a short.. Somewhere.. I ended up re-soldering the selector switch, a couple of weak connections on the tuner board and...
  8. Richs_Trains

    Marantz 1060 Basket Case Dead Short

    Hey all, I have a 1060 that I basically got for free as the seller listed a 1060b in good condition, but send a 1060 in trashed condition. I was tempted to part it out since it is in such rough shape, but I have never done that and hate to destroy such a classic piece. So, I put it on the DBT...
  9. Briant8

    Changing lamps, Yamaha CR 2040 go boom.....:-(

    I posted this in the Yamaha forum, but got no replies at all. Is this a better forum for this topic? (Sorry, trying to learn the ropes...) Ok, so not that much drama but still my first major screw up. I found this posting from a while back from someone else that explains almost exactly what I...
    • Briant8
    • Thread
    • blowing fuses lamps shorted yamaha amplifer problems
    • Replies: 7
    • Forum: DIY
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