1
\$\begingroup\$

enter image description here

Gentleman, I need help in identifying this component. There are 6 on the board but, this one and one other are black at the end. The rest have a very light blue stripe on the same end as the black on this one. The second picture of course are the "good ones", id like to know what they are and can I get them.

What I'm working on is a Kodak pulse 7inch picture frame.enter image description here enter image description here

\$\endgroup\$
  • \$\begingroup\$ Glass Diode???? \$\endgroup\$ – Tyler Mar 10 '17 at 16:50
  • \$\begingroup\$ Measure the resistance in both directions, check whether it is a diode by measuring forward voltage.. \$\endgroup\$ – User323693 Mar 10 '17 at 16:56
  • \$\begingroup\$ ok thank you, I realize some glass diode's have a black stripe, but this one looks bad to me, your thoughts. \$\endgroup\$ – Honor1 Mar 10 '17 at 16:58
  • \$\begingroup\$ Looks like a glass encapsulated diode to me. Though what kind of diode is indeterminate. \$\endgroup\$ – Trevor_G Mar 10 '17 at 16:58
  • 1
    \$\begingroup\$ The band colour difference may be a clue that one type is ordinary silicon diode, while the other might be a zener (avalanche) diode. Your ohmmeter tester likely won't discriminate as Trevor has suggested. \$\endgroup\$ – glen_geek Mar 10 '17 at 17:10
2
\$\begingroup\$

Yup, certainly diodes. Its even marked on the PCB, so thats good as it confirms it. if they are blown, try replacing them with normal/leaded diodes to try it out before ordering surface mount ones.

Also, are there any markings on the PCB? You never know, you might be able to find a schematic for the whole board, that way you will know what sort of diodes they are :)

|improve this answer|||||
\$\endgroup\$
  • \$\begingroup\$ I noticed the diode sign just after I had post this, ill be honest I didn't know what it stood for, but I put my camera on a huge angle and saw them just tucked under it. where would I go to find a schematic of the board. \$\endgroup\$ – Honor1 Mar 10 '17 at 17:38
  • 1
    \$\begingroup\$ " where would I go to find a schematic of the board." Start by finding a model number on the board, then Google. Or get the model and manufacturer of whatever the board comes from, and Google. \$\endgroup\$ – WhatRoughBeast Mar 10 '17 at 18:12
1
\$\begingroup\$

The ones with a blue band are probably Zener diodes.

There's not much else you can tell about them with no more information than you've got.

There are diodes with more information in the color code, those have more color bands.

|improve this answer|||||
\$\endgroup\$
1
\$\begingroup\$

Those are diodes. The package looks like what some manufacturers (I'm pretty sure Fairchild is one of them) refer to as "LL34".

These kinds of diodes are small signal or Zeners.

|improve this answer|||||
\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.