Mount The Psug/Really Big Heat Sink Assembly To The Chassis; Inspect For Clearance; Testing The Result; Reassemble The Amplifier - DYNACO Stereo 120 Manual

Installing the really big heatsink for the power supply

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Mount the PSUG/Really Big Heat Sink Assembly to the Chassis

Mount the PSUG/Really Big Heat Sink assembly to the chassis using two 6-32x3/8"

screws. One of the screws goes into the newly drilled hole. The other screw goes into the

slot. The screw doesn't really quite fit into the slot, but you can screw it into the slot with

your screw-driver. You could also use a rat-tail file to open up the slot just a bit.

Note that for the ultimate heat transfer, you could apply thermal compound to the bottom

of the heatsink.

Inspect your work, making sure that none of the components on the PCB has leads that

are touching any metal surfaces outside the PCB. Refer to the cover illustration for the

orientation of big capacitor clamps if you should find that there is interference.

Make sure that there are no miscellaneous bits of hardware or wire floating around the

amplifier.

If you power up the amp, you should see 72 Volts of DC across C12 after the slow start

time has expired. Please be careful to stay clear of the high voltages inside the

amplifier.

Turn off the amp and pull the plug before going on. Wait 2 full minutes before

continuing.

Return the mounting foot to its original hole. Note that the mounting foot is now separate

from the RBHS mounting. The mounting nut fits between the fins of the heatsink if you

put your added hole in the correct place. Replace the cover and install the 4 screws that

hold the cover in place.

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