Last time around we removed the Tone Control board from the front panel of the Altec 1592B.
You can see there are 2 pots - for the LF and HF controls - that are soldered right to the board.
I need to remove them in order to get to the resistors underneath.
Now we can clearly see the resistors under it. There's also more room to get at the electrolytic caps and other resistors I'm going to change out.
I don't think the universe will end if I leave them in. Unlike the electrolytics, which will become the undead electrolytics and eat the brains of whatever they're installed in.
open them up to give them a proper cleaning.
In this case,
Instead of spraying cleaner "into" the pot, (which means the spray goes everywhere except into the opening in the pot), I sprayed some cleaner into a cup.
Stew-Mac pipettes I keep on hand.
And drip, drip, drip into the pot.
Next time: the filter caps on the main chassis.
Altec 1592B Rebuild Project
Part 1: Overview and Initial Dissassembly
Part 2: Power Amplifier/Main Board
Part 3: Tone Control Board (This page)
Part 4: Filter Capacitor Replacement
Part 5: Reassembly