Recent content by tontrack

  1. tontrack

    JVC TV "AV-27530" service manual needed

      Hi. The switch IC is also suspicius to me, is a TA1218AN and there is also a chip called TC90A49AP wich is a "video enhancement" chip. Does anyone have a service manual to this TV? Thank You.
  2. tontrack

    JVC TV "AV-27530" service manual needed

      Hi. Does anybody have this service manual. This TV is not selecting inputs (i guess), the only thing it shows is a blue screen, doesn
  3. tontrack

    Water level detections system

      Hi KMoffet,   Yes, you are right, the corrosion factor is present. But, consider this: 14V/100KOhm equals 140uA. With inox steel (sorry for not mentioning that before) corrosion at that current level is not really a trouble. The maintenance of the rods (cleaning with sandpaper or acid) is...
  4. tontrack

    Water level detections system

    Hi Here is a simple circuit i took from a genius that published it on the web with no ref. , i mean genius because he used the 555 in a really intresting way the circuit uses the treshold and trigger inputs of the 555 because inside the ic are two comparators configured as a window comparator...
  5. tontrack

    Constant current battery charger

    Hello Pier. Charging a battery can be tricky, but as a rule of thumb standard charge of a battery is achieved with a constant current of a 10% of battery full capacity to its +20% of nominal voltage. Example: a 12V battery of 36A is charged with 3.6A until it reaches 14.4V. So, you will need...
  6. tontrack

    Water level detections system

    Hi Ziamdih, I
  7. tontrack

    TV service mode codes

    I live in Cuba, so is very hard for me to get information. Ladies and Gentelmen P L E A S E help me by sending me all the tv service mode codes you estimate I should know. I´m a student and hobbyst. Thank you a lot :) my mail is [email protected]
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