Rhodes 5 pin Suitcase amplifier repair:
This 1 hour long video covers:
Identifying parts
Troubleshooting
Checking for proper voltages
Setting the Bias point on each amplifier
Setting the offset voltages on each amplifier
Rebuilding the +/- 15 volt power supply
How to check components like power transistors
How to replace resistance wire with the proper Resistors
Where to look for loose connections and how to re-solder them
This is an excellent video for the beginner to intermediate tech who would like to learn and repair their own or others gear.