Actions
Forum Thread Details
  • Replies 14 replies
  • Subscribers 359 subscribers
  • Views 5136 views
  • Users 0 members are here
Related

Diode identification and car radio repair

edumcg

Hello,

 

 

I'm trying to repair my nissan car radio model: Clarion BTS33

 

 

The problem began when the fuel volumen line of my car shortcircuited with 12V.  As soon as that happened my radio turned off and never came back again. I sent the radio with some folks to repair it, they replaced some ICs that were burned out but they couldn't replace one specific diode.

 

 

Right now, when I plug the radio into my car only the screen shows up but it prints nothing. Just a blank orange screen. No audio output no matter what buttons I press.

 

 

I found the cable on Amazon: https://www.amazon.com/20-pin-Subaru-Headunit-Harness-Steering/dp/B01D9K3L44

 

 

I also found the user manual of the radio: https://fccid.io/2ABGYBTS33-CLARION/User-Manual/User-guide-2150158

 

 

The only component that looks burned out is the diode D402. The diode is the same as de diode D403 so I can see the marking is "C308" the 08 is fllipped to the right 90 degress.

 

 

My plan is to replace the diode but I haven't been able to find a datasheet.

 

 

I've attached images of the radio and the circuit board. Any help would be appreciated.

 

 

Thanks!

Attachments:
image
image
image
image
Parents

  • Hi guys,

     

    Well I measured the 3 terminals of the diode and only the 2 that are beside each other resulted with continuity. I also noticed that the continuity is because they are both grounded. Another thing I noticed is that the marking is actually "C30B" I mistaken the B for an 8.



    Sorry for my bad diagram. So I'm not sure if this part is actually a diode at all. But as Fredrik Andersson said maybe is not worth it to replace this irrelevant part and I should be searching for something more specific.

    I think my next step is to identify every IC on the board and then try to find their specific datasheet to figure out if they are doing what they are supposed to.

    image

Reply

  • Hi guys,

     

    Well I measured the 3 terminals of the diode and only the 2 that are beside each other resulted with continuity. I also noticed that the continuity is because they are both grounded. Another thing I noticed is that the marking is actually "C30B" I mistaken the B for an 8.



    Sorry for my bad diagram. So I'm not sure if this part is actually a diode at all. But as Fredrik Andersson said maybe is not worth it to replace this irrelevant part and I should be searching for something more specific.

    I think my next step is to identify every IC on the board and then try to find their specific datasheet to figure out if they are doing what they are supposed to.

    image

Children
No Data