The output section...
I noticed two caps on the board wired across the rails and ground. I do not think these are original as these are not on the schematics (unless
these were a factory mods which sometimes are not reflected on schematics). It made the board very crowded and messy looking. However, I
retained these caps because by-pass caps improve high-end characteristics. I did however, move them from this board, and placed them
across the supply caps which is a more standard location for these (more on this later).
I noticed two caps on the board wired across the rails and ground. I do not think these are original as these are not on the schematics (unless
these were a factory mods which sometimes are not reflected on schematics). It made the board very crowded and messy looking. However, I
retained these caps because by-pass caps improve high-end characteristics. I did however, move them from this board, and placed them
across the supply caps which is a more standard location for these (more on this later).
Cleaned up... Audio caps installed, transistors and resistors checked. I replaced one resistor that was showing signs of heating - R733 in lower
right corner (the blue one next to the pot). You can see the original in picture #2 on this page (Note the discoloration on it).
right corner (the blue one next to the pot). You can see the original in picture #2 on this page (Note the discoloration on it).
Hardware is removed from the PCB to allow for cleaning and work. 1) rail supply wires and by-pass caps, 2) heat syncs, 3) relay