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625uhf

Soundcraft Spirit Power Station 1200
« on: August 15, 2012, 06:57:42 AM »
 :)Hello

Does anyone have a schematic for this powered mixer desk which includes the power amp/protect pcb type SC3890B Issue 5 please?  I'm tracing a Relay switching fault (powering up, rails seem OK, audio to headphones but main power relays are not pulled in at power up and 'mute' LED remains on).  The circuit used on this panel differs from the one in my manual , eg Q48, 2SK941 switches relays on this unit whereas my manual shows it as TR22, MPSA92, etc.  Any help appreciated!


 

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