urei 1601e power supply? |
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service dept Steve
Old Croc Joined: 30 January 2010 Location: S.W.London Status: Offline Points: 2034 |
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Posted: 05 July 2021 at 10:52am |
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It sounds as if you are getting the three voltages at the power supply, why do you think
that the fault in the headphone output has anything to do with the power
supply directly? Could this "high" voltage at cn11 be +30v thereby meaning you have a low - voltage (ie an unbalanced output because of no 0v connection)? These mixers are a very poor design, there is no
protection from faulty components and there is always the likelihood that you have a
failed headphone amp which could pull the +-15v down. Usually though the
amp goes short circuit and kills the mixer by burning all the way back
to the processor.
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fabianmu
New Member Joined: 27 June 2021 Location: Wien Status: Offline Points: 1 |
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Hello Forum,
my PSU on my Urei 1601e also broke and im glad that these mixers still have owners. My Problem started with not getting any Headphone output, this was years ago and i nearly forgot it. I resently picked it up to get my old 1210 running and desided to give it a try to repair. First thing i did, was removing the front panel and desoldering the headphone jacks. After checking the voltages on the cn11 header i noticed very high voltages between ground and v+. I removed the psu and unplugged cn2 to messure it direclty and getting different voltage levels as described in the schematic. I think i have a blown component around ic1 but could not find a damaged one. Desoldered and checkt D1, D2, R16 and C8, they seam to work. could the IC1 (UCC3842A) be damaged? Some pointers what to check would be appreciated. Or should I stop worrying and get a new PSU ? in this case, which one should i get. Every help is appreciated. Best Fabian Edited by fabianmu - 04 July 2021 at 4:21pm |
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macros
New Member Joined: 22 June 2021 Status: Offline Points: 1 |
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If you look carefully in the schematics, you will see the power connector and its voltages
+8V GND +15V GND GND -15V
I would not recommend trying to fix the PSU yourself, it can kill you for real! I would also not recommend fixing this PSU, just get an alternative (switching one) Edited by macros - 22 June 2021 at 4:54pm |
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t_groove
New Member Joined: 22 March 2013 Status: Offline Points: 5 |
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Ciao a tutti
ho bisogno di aiuto, ho UREI 1601 con alimentatore danneggiato. Chiedere a STEVE ea tutti gli utenti se possono darmi la tensione di alimentazione come nella scheda di potenza scrivere: + V2 -V2 + V1 Agnd Agnd -V1 Se non รจ molto costoso quanto per la riparazione? considera che sono italiano. Grazie per la risposta
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t_groove
New Member Joined: 22 March 2013 Status: Offline Points: 5 |
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hello to all
i need help , i have UREI 1601 with power supply damaged. Ask to STEVE and to all users if can give me the power supply voltage like in the power board write: +V2 -V2 +V1 Agnd Agnd -V1 If is not much expensive how much for repair ? consider that im from Italy. thanks for the answer |
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service dept Steve
Old Croc Joined: 30 January 2010 Location: S.W.London Status: Offline Points: 2034 |
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Yes, worked on plenty of those, none of it is aided by ease of access!
I might be able to give you some pointers but unfortunately you would need to pm me because the inner workings of a smpsu is possibly not a good subject for open discussion just in case someone is watching whose needs exceed their skills! steve |
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ceharden
The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776 |
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What about the PSU in a Soundcraft E8? Played with those? Got a long-term resident one in the workshop which refuses to be repaired. I've verified everything except the SMPS transformer. The PSU runs but only until the bootstrap supply is exhausted because the auxillary supply isn't coming up. It's the second one I've had through my door with the same problem, never managed to fix the other one either.
I'll have another look one day. It's not really worth buying a new PSU because it'd cost as much as buying another desk second hand. |
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service dept Steve
Old Croc Joined: 30 January 2010 Location: S.W.London Status: Offline Points: 2034 |
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Right, I've just heard from boycey that his power supply is installed and working.
Satisfied customer, I usually like to kill 'em and hang them on the workshop wall. And no, don't work on one yourself, 400v stings. Steve Edited by service dept Steve - 14 March 2014 at 7:22pm |
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JR.junior
Old Croc Joined: 14 December 2009 Location: Slovenija Status: Offline Points: 1789 |
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hehe this is all what I can tell you.
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Support the scoop technology, larger mouth plays louder!
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boycey
Old Croc Joined: 25 June 2006 Location: Manor House Status: Offline Points: 1612 |
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pmed!
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the only thing more dangerous than a person who doesn't give a f**k is a person who gives a sh*t.
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service dept Steve
Old Croc Joined: 30 January 2010 Location: S.W.London Status: Offline Points: 2034 |
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Assuming it hasn't caught fire or been run over by a lorry I will be able to mend it for you. Edited by service dept Steve - 23 February 2015 at 8:56am |
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boycey
Old Croc Joined: 25 June 2006 Location: Manor House Status: Offline Points: 1612 |
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indeed |
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the only thing more dangerous than a person who doesn't give a f**k is a person who gives a sh*t.
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