I am embarrassed to admit this, but here goes.  While replacing belts on my Beocord 5500, I forgot to unplug the unit and it was in standby.  I touched the metal frame of the drive mechanism against the top circuit board which was in the service position and 'POP'.  I found a blown resistor at the R28 location, replaced it to no avail.

When I play back a tape, it sounds like the voices are on helium, even though the tape speed seems correct.  All other tape functions seem to work properly, although I have not tried recording.

I then replaced approximately 20 resistors, transistors and caps in the same electric path.   Again, no joy.  I have come to the conclusion that the area in the board I have been working on is for record, not playback.  Again, still not tested because I really do not need it to record.

I can read a schematic to figure out what to replace, but can not for the life of me figure out where I should be concentrating my efforts on this board.  Parts are cheap and I do not mind replacing a bunch, although the whole board might be a problem.

So, can anybody tell me where I should be looking on this board?  Or perhaps someone has a circuit board for sale.

Thanks for all the help.