UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

'LIVEWIRE?' · 21st Nov 2017, 12:13 pm

As the J13009 transistors check out OK I won't be looking to replace them, but it's useful to know that the BUT11 is a possible replacement. I need to replace a 10 ohm SMD resistor that is O/C. This is in the base circuit of one of the J13009s, but the other thing I need to do is check on the main PCB for what may have caused the rectifier diode in the -7v supply line to fail s/c. After that, I may finally have a working PSU, and, hopefully a working Beatbox. If anyone else asks me if I can fix one, I'll be reluctant to take on another, due to the seeming lack of spare parts & service info. availability, plus all the problems this one has caused me!!

21st Nov 2017, 12:13 pm	#58
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Re: Dr Dre Beatbox problems As the J13009 transistors check out OK I won't be looking to replace them, but it's useful to know that the BUT11 is a possible replacement. I need to replace a 10 ohm SMD resistor that is O/C. This is in the base circuit of one of the J13009s, but the other thing I need to do is check on the main PCB for what may have caused the rectifier diode in the -7v supply line to fail s/c. After that, I may finally have a working PSU, and, hopefully a working Beatbox. If anyone else asks me if I can fix one, I'll be reluctant to take on another, due to the seeming lack of spare parts & service info. availability, plus all the problems this one has caused me!!