VP-1000 Power Supply unit for Yaesu Quadra amplifier repair

Problem 1 - electrolytic capacitors

Recently I spotted some strange behaviour of power supply VP1000: strange sound a also smells unusually. So I immediately stopped the operation (but up to that moment the HF power was still present, protection circuitry reported no problems).
I dismounted the unit (it is hard work, the circuitry is nicely shielded, but is means I had to unscrew lot of screws). Finally I got inside and started search for problems. What was suspicious was the dirty PCB close to some capacitors. Electrolyte capacitors often cause problems by old radios and computer parts - they lose capacity or electrolyte liquid leaks outside. So I took them out of PCB and cleaned the PCB by ethanol.
Here you can see the detail:

What happened: after some time the capacitor became non hermetic, the electrolyte liquid got off the components to the PCB. Because the liquid is conductive, it created conductive path between certain pins. The current started to flow there, resulting in PCB heating. Finally it started to burn, creating audible sound and smell. Bad is the damage is only visible when you remove the capacitor. Not very funny... The capacitors are in positions C34 (the critical point), C8, C21, C22, C23 and C33, value 100uF 25V, in component list of Power Supply Unit PB1 stated MFR'S DESIGN CEBSM1E101M, Yaesu P/N K40149056. I checked the capacity of all capacitors, it is still good (in tolerance). So capacity value cannot be used as indicator of leakage.

Repair.
Fortunately I stopped the PCB burning soon, so only few millimeters burned. I removed the burned PCB surface using knife and cleaned the PCB. As final step I applied a protection enamel. I bought a brand new capacitors 100uF/25V 105C and replaced all 7 pieces (check polarity).

Hopefully this article can help someone to locate similar problem, but more generally it points again to known problem with old capacitors. As we see the 105C class is no guarantee it cannot happen, but can be expected that 85C capacitors are ever worse. So the only way is to replace them by new ones. I hope the recent capacitors are better in this view as manufacturers know better about that phenomena than years ago, but of course nobody can tell what happens with the components after 10 years and also no manufacturer guarantee is valid for such long time period...

Problem 2 - startup resistor