DAC Hifidiy Olympic PCM1798 assembly and problem - diyAudio
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Old 19th January 2012, 03:37 PM   #1
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Default DAC Hifidiy Olympic PCM1798 assembly and problem

Hi, from Argentina, i speak english not very well, im sorry

I have bought a Kit - DAC Hifidiy PCM1798 olympic version -
Someone has tried this kit ?

the kit comes with manual very synthesized
I dont understand a transformer volts,
Schematic Transformer:


Click the image to open in full size.


i have connected to 220v : >>


Click the image to open in full size.


when i connect to 220V, a Transformer make noise, a tube lights but... strong light... in 10 seconds a fuse cute and transformer burn,,smoke mell

Hifidiy say: " yes , it can work with 220V , the transformer is from 110 to 220V , I think may be you can check the attachment about the connection , may be you made a mistake , connect the wrong line , please check , anything can contact me, "

The DAC worked 10 seconds ,, but then see smoke.
The connection transformers its ok ?

Thank you and im sorry. I have another picture large.
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Old 19th January 2012, 05:53 PM   #2
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Join Date: Jan 2008
Location: Virginia
You need to connect BOTH of the 115V in SERIES WITH PROPER POLARITY. They have a "beginning" and an "end".
The way you connected the transformer damaged it - you applied 220V on just one 115V coil!
And you did solder in short-circuit the second coil - that is even worse for the transformer!!!

Connection should be something like RED - BLACk on 220V and BLUE - GREEN toghether. Altough, I am not sure if that's the proper polarity, it could be RED-GREEN to 220V and BLUE-BLACK toghether.
Vendor SHOULD tell you the correct connection for 220V (one of the two above), because only him knows the way the windings are polarized.

Last edited by SoNic_real_one; 19th January 2012 at 06:02 PM.
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Old 19th January 2012, 06:09 PM   #3
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Thank you Sonic!
please, could you draw me a pic please ?
you can try with paint.

im thinking about what to do now ?

a transformer burned...and a PCB components
maybe burned many components ?

maybe i can try with another kit (without chassis) u$150 , transformer u$25

or i can send to China Manufacture my kits without chassis
for u$50 shipping and they can check my kit burned and then u$50+ for shipping return to argentina?
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Old 19th January 2012, 07:06 PM   #4
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Location: Virginia
Components are probably all right... You can try buying another transformer from the same guys (with proper schematics how to connect). Or rewind (rebobinar) this one. I am sure you have shops that can do that there.
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Old 20th January 2012, 02:24 PM   #5
Mayday is offline Mayday  Sweden
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Could you post a better picture of the label on the transformer?

Windings are usually marked with a dot or something to show polarity.
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Old 20th January 2012, 06:50 PM   #6
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Quote:
Originally Posted by Mayday View Post
Could you post a better picture of the label on the transformer?

Windings are usually marked with a dot or something to show polarity.
Click the image to open in full size.
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Old 20th January 2012, 07:00 PM   #7
Mayday is offline Mayday  Sweden
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From what I can see, blue and green should go to mains, and black and red soldered together.
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Old 20th January 2012, 07:11 PM   #8
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Quote:
Originally Posted by Mayday View Post
From what I can see, blue and green should go to mains, and black and red soldered together.
sure ? many friends say in serie:

Red + Black >>>> 220V

(Blue + greend solded)

Click the image to open in full size.
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Old 20th January 2012, 07:51 PM   #9
syklab is offline syklab  Hong Kong
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According to the chinese label on the RCore:
P1 Red. -Blue
P2 Greed.- Black
Looks like you should connect Blue and Green together
the Red and Black connect to your main AC inlet.
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Old 20th January 2012, 07:58 PM   #10
Mayday is offline Mayday  Sweden
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Sorry, might have gotten it backwards.

I believe syklab is correct.
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