Sony mbx-269 power problem

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1.Model from case
2.Board model/number
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Please write all information:
1.Model from case
2.Board model/number
3.Describe problem clearly
4.What you did to solve problem
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Zishan8896
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Sony mbx-269 power problem

Post by Zishan8896 » Tue Mar 10, 2020 3:40 pm

Hello sir mere pass sony mbx-269 board hai power lagane par dc amp0.028 hai jab board check kiya to stapdown me 5v ki coil ke output capacitor par multimeter se 3.4v bann raha or 3.3v ki coil ke caps par 1.5 v bann raha tha fir jab humne dso se check kiya to ayesa lag raha tha ki supply bann kar gir raha hai fir bann raha hai fir gir raha hai fir humne output ke caps change kiye fir bhi same tha fir maine stapdown ic ki requirements multimeter or dso dono se check kiya to en pin par same condition aa raha tha means en bhi ban kar girta fir banta fir humne io ki requirements check ki to io ki VCC bhi same ho raha tha fir humne uss VCC ko trace kiya to wo VCC ek 5leg ki regutator ic se aa raha tha jab maine uss regulator ic ko check kiya to uss ka input or en pin koo tha but out put ban raha tha gir raha tha ab maine uss ic ko hata kar ic ke output me dc se 3.3v de kar dekha to output me koi shorting nahi tha ab humne dusri ic lagayi fir bhi same tha fir maine ic hata kar output me ldo 5 de kar dekha to mera 3.3v or 5v okk bann gaya but load dc par jyada dikhane laga like shorting 0.0128 amp ab maine usb ki ic hata di fir bhi same hai kya kare plz help every one my what's app no is 6394290223

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