Electronics > Repair

Gen8-180 power supply repair

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era007:
I have this issue in GEN8-180 power supply. When I turns ON the power supply the voltage display shows "OFF". If I tun ON output then Voltage display shows "OUP" and Alarm LED blinks. I have checked the AC input board and two power side boards but I couldn't find any faulty item except this shorted 5 pin .V8E (looks like TSOT-23-5 package) component on main control board. Can you guys identify this component ?

Jay_Diddy_B:
Hi,

I happen to Lambda Genesys GEN60-25 power supply on the bench at the moment. Here is a better photograph:




I am not sure what the IC does. I tried various things but I could get any of the pin voltages to change.

Jay_Diddy_B

Roehrenonkel:
Hi era007,
 
check your setting for OverVoltageProtection.

Good luck

fzabkar:
V8x = MC74VHC1G86 - Single 2-Input Exclusive OR Gate

https://pdf.datasheetcatalog.com/datasheet/on_semiconductor/MC74VHC1G86-D.PDF

http://markingcodes.com/search/c/v8

Jay_Diddy_B:
It could be, but it would mean that that my unit and the original posters, have the same date code.

The date code on the op-amp, OP2177 is 0939, thirty-ninth week of 2009.

I have a few more of these power supplies, I could check another one.

Regards,

Jay_Diddy_B

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