Connect with us

auto scan fm radio problem

Discussion in 'Radio and Wireless' started by SAADELDIN, Oct 29, 2018.

  1. SAADELDIN

    SAADELDIN

    5
    1
    Oct 29, 2018
    I have china-made auto-scan FM radio
    It was able to receive frequencies from 88MHz up to 103.3 MHz
    but not able to detect 98.2
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    24,860
    2,571
    Jan 21, 2010
    Can you manually tune it to 98.2MHz?

    Does it skip this frequency when scanning, or not recognize it as a station while scanning?

    How strong is this station compared to the weakest ones the scanner can find?
     
  3. H2814D

    H2814D

    59
    7
    Nov 4, 2017
    I had this problem with an old AC Delco FM receiver. Although I was also only having a problem with one or two stations, the antenna was the problem. Try a different antenna before messing with anything else inside. Also, if that doesn't work and you are going to open it up, check the antenna connections inside the case.
     
  4. SAADELDIN

    SAADELDIN

    5
    1
    Oct 29, 2018
    HI SIR
    WE CAN T MANUALLY TUNE AT 98.2MHZ.
    IT SKIP THIS FREQUANCY WHEN SCANNING.
    WE HAVE MANY PCBA FOR THIS MODEL SOME PIECES DETECT FREQUENCY VERY GOOD AT SAME PLACE AND SAME ANTENEA,OTHER SKIP IT,AND WE HAVE SOME OLD SAME PCBA THAT WAS DETECT THIS FREQUENCY BEFORE AND NOW SKIP IT TOO.

    FOR THIS I THINK THERE S NO ANTENEA OR FREQUENCY PROBLEM
     
    Last edited by a moderator: Oct 30, 2018
  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    24,860
    2,571
    Jan 21, 2010
    OK THAT SOUNDS FINE. BUT CAN WE STOP SHOUTING?
     
  6. SAADELDIN

    SAADELDIN

    5
    1
    Oct 29, 2018
    WE CAN T STOP SCANNING.5807 USING FOR FM WITH 24C02 AND MICROCONTROLLER.IS THE PROBLEM AT ANY OF THESE ICS?
     
  7. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    24,860
    2,571
    Jan 21, 2010
    CAN WE STOP SHOUTING? IT MAKES MY EYES BLEED.
     
  8. SAADELDIN

    SAADELDIN

    5
    1
    Oct 29, 2018
    (CAN WE STOP SHOUTING? IT MAKES MY EYES BLEED)
    I CAN T UNDERSTAND WHAT YOU MEAN
     
    Last edited by a moderator: Oct 30, 2018
  9. davenn

    davenn Moderator

    12,996
    1,661
    Sep 5, 2009
    turn off your caps lock

    typing in capitals means you are shouting
     
  10. davenn

    davenn Moderator

    12,996
    1,661
    Sep 5, 2009
    and you still haven't given us the make and model of your radio

    have you looked online for a service manual or schematic ?
     
  11. SAADELDIN

    SAADELDIN

    5
    1
    Oct 29, 2018
    its chinese pcba have 3 ics fm ic 5807 ,2402 and microcontroller i will send photo to you
     
    davenn likes this.
  12. Audioguru

    Audioguru

    2,345
    516
    Sep 24, 2016
    It might be a copy of the scanning FM "radio" I bought for $1.00 at the Dollar Store. It uses a Chinese copy of a Philips TDA7088 FM radio IC that does not work well. The radio came with earphones and a battery so the actual radio was free.
     
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.