As a general rule, if the measurement doesn't agree with the printed value then you have to isolate one end to test. If it reads correct in circuit then it probably is OK.
Really low value resistors are generally checkable in circuit.
Uploaded the photos and schematic on page 1. I figured I'd be a decent human being and make it easy for the guys who are here to help me. Thanks guys, much appreciated!!
Here's the replacements I've prepared, in case they are found to be faulty:
Original//replacement
2SC1061//TIP41C
2SA706//BD140 already replaced
2SC1124//BD139 already replaced
2SC632A-2SC634A//2SC1815
2SA678//2SA1015
10D-2 and 10D-05 diode//1N5399
Any comments, please?
Original//replacement
2SC1061//TIP41C
2SA706//BD140 already replaced
2SC1124//BD139 already replaced
2SC632A-2SC634A//2SC1815
2SA678//2SA1015
10D-2 and 10D-05 diode//1N5399
Any comments, please?
Try and find the fault by careful measurement, first by static checks and then powered with a bulb tester.
Generic parts should be fine for something like this although (and I haven't the circuit in front of me) you may need to tweak resistor values around the bias setting components and possible check for stability issues (oscillation) caused through using modern faster parts. Just something to be aware of.
Find the fault first though.
Generic parts should be fine for something like this although (and I haven't the circuit in front of me) you may need to tweak resistor values around the bias setting components and possible check for stability issues (oscillation) caused through using modern faster parts. Just something to be aware of.
Find the fault first though.
Thanks Mooly. A friend who is a retired tech is willing to help me, but that's not until end of December. I will keep you guys posted.
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