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REQ: RCA TX808H service manual

Discussion in 'Electronic Repair' started by adambomb, Sep 15, 2007.

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  1. adambomb

    adambomb Guest

    No audio on RCA TX808H tv. It's a 13" tv and should be relegated to the
    trash pile, but it's my gf's dad's tv and he was hoping it could be fixed.

    If it's not the speaker or audio cable then it looks like maybe some board
    repair is in order.

    Thanks in advance.

    Adam

     
  2. Meat Plow

    Meat Plow Guest

    Did you check the speaker/wiring? Does it have a headphone jack that
    interrupts the speaker? Many things can usually be checked/verified
    without a service manual for a small tv like that.
     
  3. adambomb

    adambomb Guest

    I checked the speaker and wiring with multimeter, and everything is good.
    The set has excellent picture, just doesn't have audio when powered on. No
    headphone jack present; only video and audio inputs. This is about as
    basic a tv as I have seen.

    Here's something I just found out. Apparently, after the set is on for a
    long while, maybe 2 hours, the sound starts working! And I mean it works
    perfectly, so that eliminates the speaker and cable for sure (cable tested
    perfectly after ohming it out.)

    Warm-up problem maybe? But it seems that would happen a little sooner than
    a couple hours. Also, after the sound started working, I powered it off,
    then powered it back on again after a few seconds. The sound still works.
    Seems like when something cools down, that's when it stops working.
     
  4. Meat Plow

    Meat Plow Guest

    Capacitors can exhibit that trait but I don't know about after a couple
    hours. If you had a scope and could identify the audio components you
    might get lucky. Otherwise a print might be in order if you're not
    familiar with the topography. Or you could tell pop-in-law to leave it on
    all the time whilst he shops for a replacement that he likes just as well :)
     
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