Identifying 70's (?) through-hole components

[android]

Just curious...what's with all the white "spacers" on the leads? I can understand having them on the power resistor for ventilation.

[Cubdriver]

The spacers on the caps are likely to keep the bit of insulating coating that usually forms a meniscus on the leads that extends out a short distance from the body from reaching into the hole on the circuit board and by so doing potentially compromising the solder joint on that component.

-Pat

[Isad]

2: Seems like a 200v zener i have seen some like those and have
4 of them in my junk bin.

[dacman]

The blue capacitors look like Philips (and I think I see Philips on one), which is now BC Components owned by Vishay.

[Gyro]

If I read your latest picture correctly, one of the polyester capacitors (top right corner) is shorted! Not really surprising given the age and the temperature in that corner. That could be your fault right there. I'd suggest replacing both of them as a first step. They're fondly known as Philips 'Licorice All-sorts' capacitors. If I read them correctly, they are 100nF 10% (brown black, yellow, white). i can't see the bottom colour (voltage rating) in any of the pictures, this will be either brown (100V), Red (250V) or yellow (400V). It might be worth replacing them with polypropylene types for better ruggedness.

Edit: If you still get zero ohms across the PCB pads then it could be that the TO5 pkg transistor is shorted, but my bet would be on the capacitor itself.

[T3sl4co1l]

I wouldn't be surprised if one of those caps is in parallel with a winding (to enhance resonance perhaps), but not if it's that big (1n or 10 would be reasonable, but 0.1u is kind of big for that).

Tim

[steve207a]

well it looks like youve got ac from a transformer entering the board through the 4 small round diodes  with a couple of 150mfd smoothing capacitors then an inrush thermister  and the diode is possibly a zener to maintain a constant voltage and another smoothing cap check this one as close to heated parts and electrolytics have a habit of drying out over time and stress the 68 ohm resistor by 2 has seen some stress looks like a phillips type also the t05 transistor  spacer looks like its melted so that could be suspect having got so hot  the diode has some markings on it  if you remove it you should be able to see and look on internet for type /value the circuit  seems to go into the small transformer to supply the rest of the circuit look at the voltage spec on the blue cap next to the large diode as this may indicate the voltage for that circuit  so if 63volt then voltage around that part could  be 30 to 60v  just a guess but may help

regards steve