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γ3 building

gamma3, gamma24 (plug-in for the γ3)

Re: γ3 building

Postby intertelligent » February 21st, 2017, 5:36 am

OK.That works.When I turn to -6dB,that's output!!!
I install DA101C pulse transformer,pin1 will not align.Do I need to install it under the PCB(flip 180deg)?
thanks
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Re: γ3 building

Postby amb » February 21st, 2017, 5:41 am

You can mount the transformer as shown in your photo, no need to put it on the bottom side.
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Re: γ3 building

Postby intertelligent » March 11th, 2017, 8:31 pm

Hi Ti
After several days my γ3 DAC does not work. When power up ,LCD display does not light up.It only displays black character block(no backlight).I check voltage on some ICs.I found :
U11(iso1541) pin2(SDA) 0.5v or so
U11(iso1541) pin3(SCL) 3.3v
When desolder U11(iso1541) pin2 ,LCD can light up and display normally.I change U11(iso1541) with brand new one.The fault persisted.What happened?
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Re: γ3 building

Postby amb » March 12th, 2017, 12:26 pm

Strange. Was everything working properly before this happened?

It seems like you have a problem with the L_SDA line and the LCDuino-1 backlight control line shorting to ground or to each other. Check your wiring and soldering, and make sure these are not touching the chassis anywhere.
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