12/08/2015, 17:44
Pisza ze po wymianie spalonego Br1 nalezy wymienic tez kondensator c10 . Sprawdzic go miernikiem jezeli na AC pokazuje wiecej niz 5v to jest do wymiany
Cytat: When Replacing BR1 on the Power Supply Board, Replace C10 too.[/quote]
Capacitor C10 on the power supply board is a 18,000 mfd 20 volt filter cap. Its job is to make the +5 volts smooth. This cap is fed from the bridge rectifier BR1 on the power supply board. If this bridge has failed, you should also suspect its associated capacitor C10 to be bad (or close to bad) too. These two components work together, and both need to be in good shape to have nice smooth +5 volt logic for all the circuits in the game. Capacitors are largely a mechanical device, and they do wear out. Expect a 10 year life from a filter capacitor. That means replacing C10 is a good idea anyway (because all system 11 games are at least 10 years old now). A good C10 capacitor will also put less stress on all the +5 volt logic circuits.
Low +5 volts from the Power Supply board.
A low +5 volts coming from the power supply can often be attributed to the 47 mfd 50 volt capacitor at C8. If this cap fails (opens up), a low +5 volts will result. A low +5 volts can cause your game to reset randomly. Also a bad capacitor at C10 (18,000 mfd 20 volts) can cause a low +5 volts. This cap is the main +5 volt filter cap. To test this cap, turn the game on and put your DMM on AC volts. Put the leads of your meter on the positive and negative leads of the C10 capacitor. If you get more than .5 AC volts, replace this capacitor. Filter caps don't last forever. Expect about 10 years life from them (which means most system 11 games should have their C10 capacitor replaced!). But when in doubt, just replace C10 as it's probably due to be replaced anyway.