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    Technics SU-X102 amp repair, asking for guidance

    After plugging the unit and turning it on, the front panel works perfectly (nice!) but i was hearing an awful lot of noise, also a diode burned ? YET ANOTHER PIECE TO DIE ??? ... wtf is going on
  2. O

    Technics SU-X102 amp repair, asking for guidance

    My sincere apologies for the warcrime of a soldering job this is. The rest of my solders are way better but i did what i could with the broken traces edit: the flashlight makes it look way worse than it actually is
  3. O

    Technics SU-X102 amp repair, asking for guidance

    Okay so extra problem, while desoldering the two burnt transistors, 2 traces of the first one broke off will have to fix that with wires
  4. O

    Technics SU-X102 amp repair, asking for guidance

    So hum, little issue im noticing Im currently swapping the caps and while the service manual says for exemple c708 should be 16v 100uf, the one that is on the board is a 6.3v 47uf... wtf is this ? im going with what the manual says but i really hope its not gonna explode on me
  5. O

    Technics SU-X102 amp repair, asking for guidance

    PS: once this all arrives, i'll to the replacements, redo all the bad solders i can notice and report back to you guys
  6. O

    Technics SU-X102 amp repair, asking for guidance

    So huh, i have no idea how to measure caps without an ESR but i figured it wouldn't hurt to just swap all the old caps on the motherboard Lucky me, i found a local supplier (literally at the city next to me) that is super cheap Found all the big caps except the two 50v 1000pf on the main amp, so...
  7. O

    Technics SU-X102 amp repair, asking for guidance

    I hope the pics aren't too blurry
  8. O

    Technics SU-X102 amp repair, asking for guidance

    And here's the backside
  9. O

    Technics SU-X102 amp repair, asking for guidance

    Here's pics of the front of the board, i'll put the back in a separate message
  10. O

    Technics SU-X102 amp repair, asking for guidance

    Checked everything and here's my observations : all the resistors are good, and values are within range most ICs are good except for the IC503 (toshiba tc4066bp) which has its pin 14 having continuity with gnd whereas the schematics say it should be +6v, but if you follow the traces there it...
  11. O

    Technics SU-X102 amp repair, asking for guidance

    Hi, I recently acquired a Technics sound system from the 90's, including the su-x102 as its amplifier. Sadly it is faulty (I bought it knowing that, don't worry), when I tried turning it on the front panel wouldn't work and it would be amplifying noise on the treble line. Somehow the eq controls...
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