auto scan fm radio problem

[SAADELDIN]

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

 

[(*steve*)]

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?

 

[H2814D]

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.

 

[SAADELDIN]

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

 

[(*steve*)]

OK THAT SOUNDS FINE. BUT CAN WE STOP SHOUTING?

 

[SAADELDIN]

OK THAT SOUNDS FINE. BUT CAN WE STOP SHOUTING?

WE CAN T STOP SCANNING.5807 USING FOR FM WITH 24C02 AND MICROCONTROLLER.IS THE PROBLEM AT ANY OF THESE ICS?

 

[(*steve*)]

CAN WE STOP SHOUTING? IT MAKES MY EYES BLEED.

 

[SAADELDIN]

(CAN WE STOP SHOUTING? IT MAKES MY EYES BLEED)
I CAN T UNDERSTAND WHAT YOU MEAN

 

[davenn]

(CAN WE STOP SHOUTING? IT MAKES MY EYES BLEED)I CAN T UNDERSTAND WHAT YOU MEAN

turn off your caps lock

typing in capitals means you are shouting

 

[davenn]

and you still haven't given us the make and model of your radio

have you looked online for a service manual or schematic ?

 

[SAADELDIN]

its chinese pcba have 3 ics fm ic 5807 ,2402 and microcontroller i will send photo to you

 

[Audioguru]

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.