pg octane 900.5 repair

All of those numbers look in order, it could be the dead battery that is making me think that there is too much chrrent draw.  DO NOT CHARGE THE BATTERY YET.  It will be safer to test the amp if the battery is not hot.  If you still have the single 5 amp fuse per supply, remove the 2 ohm resistor and briefly turn the amp on.  If the fuse blows, have another 5 amp fuse ready and try it only one more time.  The capacitors trying to charge on the initial turn on may blow the fuse, if you quickly change the fuse and it blows again, we have a problem.    If that happens, you need to find and remove the rectifier diodes for the supply that is blowing the fuses.  There are 2 rectifiers on each supply.  They are located next to the power supply transistors.  There are 2 different numbers.   They must go back into the same location from which they were removed from.  Mark them with a silver sharpie or a paint pen, or take a picture so you will know which location they came from.  Removing these will tell us if the problem is in the amplifier section or in the power supply section.  After removing them, once again a single 5 amp fuse in that supply.  Try it only once this time, there are no capacitors to charge up.  Removing the rectifiers, essentially removed them from the circuit.

Sorry, the rectifier diodes are in the same case as the Z44s.  They are probably the next items in the row.  They will have either a picture of 2 diodes on each one.  One set of pictures will be pointing inward, and the other diodes will be pointing outward.  They may have the following letters all followed by some numbers.  FEN and FEP   or MUR.   The devices numbered 78XX and 79XX are not the diodes.  Do not remove them.  The 3 places that they may be located are labeled by the ? mark in the new red square on the picture.