Step 0: Pre-Autopsy Pictures
|Front view of the Technics SH-9017 equalizer.|
|Close up of the controls for the left channel. Allows the user to manually change the amplitude of certain frequencies.|
|Back of the equalizer. Note the left has spots for 4 audio connections- line in, line out, tape rec out, and tape playback.|
|Bottom of the equalizer.|
Step 1: Removing the Metal Casing
The metal casing was held on by a few screws, depicted below.
|4 screws were on the back of the metal casing. There were two along the top rail as shown here and one on either side rail.|
|Once those screws were removed, the top of the metal casing came off quite easily!|
Step 2: Looking Inside the Black Box
Step 3: Removing the Main Equalizer PCB
|The front panel was attached to the bottom of the equalizer box with a few screws.|
|Once the screws were removed, the front black panel came off quite easily. However, some electrical components were still attached to it.|
|The power button circuit was |
unscrewed from the front panel.
|The long, skinny PCB was clipped to the black plastic with a few pins.|
|Unclipping the black pins shown in the previous picture freed the circuit board.|
|At this point, most of the circuitry is removed from the casing.|
Step 4: Removing Remaining Screws and Disconnecting Ribbons
|The other two circuit boards were screwed down to the metal bottom, so these screws were removed.|
|Circuit board was unscrewed from the bottom.|
|The boards were connected with ribbon cables. A small screwdriver was used to free the cable from the connector.|
|The power supply circuit was popped off from the back panel with a screwdriver.|
|Once the power supply was removed, all of the circuitry was taken apart as much as possible.|
Step 5: Taking Apart Plastic Bits (From Front of Casing)
|Power supply plastic popped out of back of casing.|
|Plastic bits removed from bottom of casing.|
The front panel consisted of two panels snapped together, with little plastic bits used as sliding knobs to control the dB gains.
Step 6: Final Look at PCBs
Power Button circuit, front and back.
Main equalizer circuit board. All of the "magic" goes on here.
|Circuit that controls which input/output is being used.|
|It is a beautiful hand drawn circuit board.|
The power supply connector, front and back.
|Power circuit. Converts power to something usable for other parts of the circuit.|
|This also has a beautiful hand drawn back.|