The delivery of this manual was very fast, less than 8 hours. The manual is very clear and concise, and helped a great deal in the repair and final setup of the Hitachi HMA-G2 Amplifier.
At $5,00 certainly good bang for your buck. Includes electric schematics as well as exploded parts view + parts list for reordering. Unfortunately no details on the PCB contents or working, but then again, this is not overly complex. Best bonus: this manual does contain the heavily searched for LED error codes as well as descriptions for test operation. Haven't gotten around to fixing the machine yet, one thing the manual won't do for you is getting it out of the kitchen assembly :-(
It`s not your fault tear down is rather incomplete. It doesn`t have complete instructions as to deconstruction for repair.
Text excerpt from page 24 (click to view)
5-2. Replacing the CPU
1. How to remove the CPU 1 Rotate the lock with a flat-blade screwdriver toward the unlock position shown in the figure. 2 Remove up the CPU. 1
CPU lock position 2
unlock position
CPU socket
2. How to install the CPU 1 Position the mark on the CPU to the mark on the CPU socket and put in all pins to the holes on the CPU socket. 2 Pressing two corners marked with in the figure, rotate the lock with a flat-blade screwdriver toward the lock position. 2
mark CPU unlock position mark 1
lock position
CPU socket
Note: Lock the CPU properly, or operation becomes unstable.