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| Doubts about a zener diode used in a 400W power supply https://vlab.su/viewtopic.php?f=46&t=63404 |
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| eletmoraes [ 07 июл 2017, 17:12 ] | |
| Заголовок сообщения: | Doubts about a zener diode used in a 400W power supply |
I have an ATX 400w source (RS-400-PCAR-A3) that the zener diode D4 (T2D-86) is open located on pin 4 of the tny277 and I do not know how much it worth, can anyone help me to identify? D4 zenner = T2D-86 ? Should be the problem on the pin 4 line of tny277 because when I measure the voltage on this pin accuses me more than 1000v and at most it should be 400v. |
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| eletmoraes [ 07 июл 2017, 22:36 ] | |
| Заголовок сообщения: | Re: Doubts about a zener diode used in a 400W power supply |
This voltage of above 1000v we should ignore, it is the digital multimeter that is supplying this voltage in a wrong way, in the analogue multimeter is providing 400V. When I plug into the AC outlet the cooler swivels and then goes stop. |
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| eletmoraes [ 08 июл 2017, 04:04 ] | |
| Заголовок сообщения: | Re: Doubts about a zener diode used in a 400W power supply |
Now I am beginning to think that the defect is not the T2D-86 diode but the integrated WT7527 because on the pin 16 (PGO) the voltage is 0V. |
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