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Old 4th January 2012, 08:53 PM   #1571
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Default Noob Help for Hyponotize DCB1 Black

Hi everyone

Sorry for noobie question here….
I just finish up the build Hypnotize Black version

But first three LEDS light up fine(both Channels) but second Five LEDS(both channels) not lit up and regulated voltage is +18.3V and 18.3V…(Im using Hammond 12-0-12 2AFor testing) seems like regulator does not work properly… using 10ohm resistors for current limiting…

I checked LEDs polarity several times… and others like TR and resistors too… Relay works fine

I checked each five LEDS banks and it lit up fine individually, but not lit up all five LEDS altogether.

I really appreciate any help
Thanks
John
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Old 4th January 2012, 10:35 PM   #1572
Salas is offline Salas  Greece
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In the 5 leds strings the cathodes (shorter legs, aligned with flat rim cut D on led bodies) must go to the round pads. Is it so?
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Old 4th January 2012, 11:11 PM   #1573
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Hi Mr. Salas,

Thank you for quick reply. Yes I checked several times already, for 5 banks of LEDS directional is OK. If I connect battery each LEDs, it works fine though.

Should I change the TRs and FETs ???

Thank you
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Old 4th January 2012, 11:26 PM   #1574
Salas is offline Salas  Greece
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Maybe you miss 1 Ohm resistors or simply jumper links where it has a resistor symbol with ''1'' in it?
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Old 5th January 2012, 12:19 AM   #1575
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Hi Mr. Salas,

Problems solved I recheck it and each one contains one Bad Leds Change to new one works great !!!

Thank you again

I really appreciate your contribution ti this diy comunity.

John
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Old 5th January 2012, 12:20 AM   #1576
Salas is offline Salas  Greece
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You listen to it already?
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Old 5th January 2012, 12:52 AM   #1577
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Not yet I just confirmed regulator works! Voltages are within range and output DC offset looks good. will connect and listen it soon. Cant wait....
hopely +18, -18 did not damage anything.....

Thanks
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Old 5th January 2012, 12:55 AM   #1578
Salas is offline Salas  Greece
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If your relay clicks, regulator voltages are around 10V each and the DC offset on output is good, I don't see any grounds for it had suffered possible damage. Let us know how it went and post a picture also if possible when it will test alright.
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Old 16th January 2012, 05:39 AM   #1579
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Hi Salas, built my 1st DCB1(hotrod) and on one side the 5 led don't glow(and they are right position,no error)nothing hot or smoke and relay work. Start it with variac and stop at about 85AC on 120AC. What transistor is wrong ? Thank's
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Old 16th January 2012, 09:21 AM   #1580
Salas is offline Salas  Greece
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If you are sure everything is assembled in order, check the CCS Mosfet of the bad side first.
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