2024-04-27 01:26 AM
Hi all and good time
can U help me please?
i'm confused about this part with the (UM smd code),
i searched a lot on google and but i found only 2 parts with this smd code... (zener diode and tvs diode) !!
my first find --> zener diode Bzx84j-C5V6 SOD-323
and next my find -->(TVS Diode) with part number (SMAJ15CA)
i got crazy
.i really need your help
T H A N K YOU So sO So MUCH
(mazie)
Solved! Go to Solution.
2024-04-27 04:58 AM
Hi,
still more to ask :
- how you found the "shorted" diode ?
- what signal/condition caused the failure ?
- are you sure, the cpu still ok ?
+
the cpu seems 5V type, s3f84nb , qfp64:
So pin4 (the diode goes here and to pin 9 , VDD) is a protected input : guessing -> a 5V6 zener makes more sense here, than a 15V protector.
2024-04-27 02:11 AM
Hi,
What board is it ?
and which cpu ?
+
Why you ask ? (It looks good...not working - or ??)
2024-04-27 04:18 AM
Hello
thank U for asking?
1.its a mainboard of security car alarm system.
2-SAMSUNG --> S3F84NBXZZ-QT8B
3.shorted
4.please tell me which one should i choose??
5.thank U again
2024-04-27 04:58 AM
Hi,
still more to ask :
- how you found the "shorted" diode ?
- what signal/condition caused the failure ?
- are you sure, the cpu still ok ?
+
the cpu seems 5V type, s3f84nb , qfp64:
So pin4 (the diode goes here and to pin 9 , VDD) is a protected input : guessing -> a 5V6 zener makes more sense here, than a 15V protector.
2024-04-27 06:28 AM
first of all, thank U for your time
then i have to say this ; i tested this diode with a multimeter both inside the circuit and outside the circuit, and in both cases the multimete showed zero volts. idk why
i hope it will be fixed
anyway thank you SO MUCH for your guidance
have a nice day and night