Hello Everyone
I'm getting 0V from the 10VDC unregulated output on a ARII-2 PCB. all other voltages are fine. No obvious burnt parts.
I did the Bob Roberts shotgun repair kit, but am confused as to what transistors need insulation. I've done as per Bob's instructions and still have issues;
http://www.therealbobroberts.net/aar2.html
However, if I use no insulators as suggested on Q5,Q7 & Q8, the metal screws will ensure Q3 (3055) case to short, won't it? I've seen other ARII boards have all insulated without issues?
Bob's instructions suggest;
Always finish up this job by checking to make sure there is no short between the case & the heat sink.
Surely this short will always happen unless Q5/Q7/Q8 are insulated?
Any help is appreciated.
I'm getting 0V from the 10VDC unregulated output on a ARII-2 PCB. all other voltages are fine. No obvious burnt parts.
I did the Bob Roberts shotgun repair kit, but am confused as to what transistors need insulation. I've done as per Bob's instructions and still have issues;
http://www.therealbobroberts.net/aar2.html
However, if I use no insulators as suggested on Q5,Q7 & Q8, the metal screws will ensure Q3 (3055) case to short, won't it? I've seen other ARII boards have all insulated without issues?
Bob's instructions suggest;
Always finish up this job by checking to make sure there is no short between the case & the heat sink.
Surely this short will always happen unless Q5/Q7/Q8 are insulated?
Any help is appreciated.

