(Phillip Bigelow) writes:

I am a neophyte when it comes to electronics, but I have decided to
replace a small burned-out incandescent bulb inside the display panel
of my old Marantz 25-watt receiver (circa 1980). Easy job. Shouldn't
take more than 5 minutes. Remove the front panel from the rest of the
case by removing 4 nuts from the front panel. Then pull off the
control knobs. The problem is that the control knobs won't budge! I
checked carefully, and there are *no* set screws, so that isn't the
problem. The knobs are just your run-of the mill metal knobs. The
only way to remove the front panel is to first remove the knobs, so
that is why I believe the knobs are "removable".

I don't want to damage anything inside the enclosure that the knobs
are attached to. And frankly, I can live with a half-dark display
panel.

Before I decide to leave well enough alone, I thought I'd ask if there
are any tricks involved in safely removing tightly-attached knobs. Or
should I just become more "assertive" in my pulling?

If there are no set screws, they should just pull off but may be quite
tight after 23 years. I assume one is on the tuning knob. Since that
is a just a bushing, you probably can't hurt anything with resaonable
force. Try that one first.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
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