x0xb0x not working!

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cedric30
 
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Joined: Tue Mar 11, 2014 10:13 am

x0xb0x not working!

Post by cedric30 »

I explain, it don' t power up, on j4 i have the 5.33v and 12v but the sequencer part are not power up, on ic3 i have 0.12v on pin 20 and ground, i have change the capacitors around ic3,c106 but no results always 0v on ic3, change too the power supply ,what is the matter? can you help me?
thank's

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cedric30
 
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Re: x0xb0x not working!

Post by cedric30 »

i explain the x0x was working about two years, i have bought a kit and make it, but there's few days before it don't work, i must power on off a lot of time before it work and now it don' t work like i explain there's no power on sequencer parts! thank's to help me!

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antto
 
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Re: x0xb0x not working!

Post by antto »

check on the IO board at the 5V regulator - do you have 5V there
the cpu (IC3) needs 5V and this is separate from the synth (which only needs 5.333 and 12V to work)

if you have proper 5V at the regulator - check if it reaches the main board (the 12-pin jumper cable caries it)

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cedric30
 
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Re: x0xb0x not working!

Post by cedric30 »

at the regulator i've no proper 5v, just after power up :yes but after it fall down to 2v! i've change the two capacitors and the regulator the passed week! ??? where can i see? thank's

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antto
 
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Re: x0xb0x not working!

Post by antto »

so the voltage at the regulator is 5V only immediately after you power it up, but then falls down to 2V and stays there?
that's not okay

can you disconnect the 12-pin jumper cable and measure the 5V again?
if it still falls to 2V - try and put a new one in, also check the surrounding components

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cedric30
 
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Re: x0xb0x not working!

Post by cedric30 »

yes i have disconnect the 12 pin wire and it faff down to 2.5v, maybe a bad regulator, i will change it! see you soon later after change the regulator, thank's!

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cedric30
 
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Re: x0xb0x not working!

Post by cedric30 »

now working! it was a bad solder under the caps! thank's!

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antto
 
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Re: x0xb0x not working!

Post by antto »

nice :mrgreen:

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