Recent content by redk9258

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    JVC R-X500 RECEIVER LEFT CHANNEL DISTORTED WHEN COLD

    Sounds like you need a signal generator, scope and heat source to find the problem area.
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    Help! Short in HK PM660

    Measured in circuit? Caps do not always measure correctly in circuit. There is more to checking capacitors than capacitance. ESR is very telling of a bad cap. A cap can also be electrically leaky or shorted.
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    JVC-AX222 - VC5022 issue, fake parts and improvement - Repair Attempt

    This is interesting too.. https://www-elektroda-pl.translate.goog/rtvforum/topic1039106.html?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=sc#20337601https://www-elektroda-pl.translate.goog/rtvforum/topic1039106.html?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=sc#20337601
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    JVC-AX222 - VC5022 issue, fake parts and improvement - Repair Attempt

    You could also look at the schematic of the fist Super A amps. I believe they were made with discrete components. I cannot remember the model(s) though.
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    JVC-AX222 - VC5022 issue, fake parts and improvement - Repair Attempt

    A thread mentioning that LA2500 works as a substitute... https://www.diyaudio.com/community/threads/jvc-a-x2-super-a-integrated-amplifier-right-channel-power-transistors-burnt.359748/
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    JVC-AX222 - VC5022 issue, fake parts and improvement - Repair Attempt

    This is the thread I saw... https://www.diyaudio.com/community/threads/equivalent-de-vc5022.155206/
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    JVC-AX222 - VC5022 issue, fake parts and improvement - Repair Attempt

    I cannot be 100% sure but I believe LA2500 is the same part. VC5022 is custom made / labeled for JVC. That was probably a marketing thing. It would be sweet to have a small PCB to replace these when they get damaged! I think I read a post on DIY Audio where someone removed this IC and changed a...
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    SX-1980 Output Transistor Insulators

    I wonder if you could cut mica on the Cricut?
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    SX-1980 Output Transistor Insulators

    I think you can buy mica in sheets and cut / punch holes yourself.
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    Pioneer SX-3800 biasing with new outputs.

    If you have a scope, maybe you could lower it until crossover distortion presents itself. Then raise it a little and test it at that setting for a while.
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    SX-1980 Output Transistor Insulators

    I would not stack two pieces of mica together.
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    How to check a large 31000 uF capacitor?

    I'd bet the Anatek Blue ESR meter or Peak ESR meter would read the ESR just fine.
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    Rare, really rare Curtis Mathes 3/4 size receiver

    Is this a direct coupled or cap coupled amp? What does the DC offset measure?
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    Sony CDP-X303ES won’t play track 1 at start up

    Oh. Well that's a winning situation then! Do you have a scope and / or ESR meter? Maybe it's a bad cap in the servo section or something? Maybe doing the alignment adjustments with a scope will make it run. You might want to reach out to @dr*audio to see if he can offer some advise. There is a...
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    Sony CDP-X303ES won’t play track 1 at start up

    Return it and get a refund.
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