Only 3V on 5.33 Power Supply! (Willzyx kit)

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ben gillissen
 
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Only 3V on 5.33 Power Supply! (Willzyx kit)

Post by ben gillissen »

Hi there,

I'm experiencing some problems with my Xoxbox power supply. I'm only getting 3V instead of 5.33V. The strange part is that I was getting 5.33V when I finished the power supply, but after getting some strange readings on the VCO, I tested it again and somehow it dropped to 3V. Willzyx is always prepared to offer help, but I can't seem to reach him atm.

I've already read different posts about this subject, but I can't figure out what could be the faulty component. Of course I did some measurements for you guys..:

D44 - D45 = 0.5
D45 - R5 = 1.01
R5 - TM6 = 1.24
TM6 - R4 = 1.46 (ranging from 1.44 tot 1.49)
R4 - D46 = 2.03
D46 - D47 = 2.54
D47 - R3 = 3.04
R3 - R2 = 24.2
R2 - R1 = 27.3

Trimpod = 1.26/ 1.36/ 1.46

LM336 = 0/ 3.04/ 1.37

6562:
0/3
3/3
3/3
6.67/27.2


Hope someone can help me!

Greets,

Ben

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altitude
 
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Re: Only 3V on 5.33 Power Supply! (Willzyx kit)

Post by altitude »

anything running really hot?

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ben gillissen
 
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Re: Only 3V on 5.33 Power Supply! (Willzyx kit)

Post by ben gillissen »

Left it on for quite some time, but no high temperatures..

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mmm
 
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Re: Only 3V on 5.33 Power Supply! (Willzyx kit)

Post by mmm »

The voltage drops along the diodes look ok to me. So my guess would be IC22 or IC23.

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ben gillissen
 
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Re: Only 3V on 5.33 Power Supply! (Willzyx kit)

Post by ben gillissen »

Hmmm ok. Thanks. And is there a way of knowing which one, without desoldering them? Especially IC23 is a pain to get out..

Greets

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mmm
 
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Re: Only 3V on 5.33 Power Supply! (Willzyx kit)

Post by mmm »

I'd try IC22 first.

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ben gillissen
 
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Re: Only 3V on 5.33 Power Supply! (Willzyx kit)

Post by ben gillissen »

Hi,

Sorry for my late reaction. Haven´t been able to work on it for a few weeks. I replaced IC22 and the power supply is working fine now! Finished the rest up and put everything together. Now it looks good, but it doesn´t sound right ;). But I will open a new thread for that.

Many thanks,

Ben

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