-90 17
-85 1A
-80 1C
-75 1E
-70 1F
-65 20
-60 22
-55 23
-50 23
-45 24
-40 25
-30 26
-10 27
+10 28
AR8000 top panel knobs
As time passes, the top panel knobs may appear to loosen, this is more apparent on earlier
units. Occasionally we receive reports that the on/off switch does not function... in reality the
knob is simply slipping round-and-round and no longer has enough friction to activate the
on/off click switch.
The knobs have a rubber type composition and appear to chemically react with the metallic
material of the control shafts over a period of time. The later AR8000 knobs have a harder
composition and thicker walls, in fact it is quite difficult to pull the later type knobs off the
control shafts, a grip like superman is required!
When replacing the top panel knobs, clean the shaft with a cloth or tissue to remove any
residue before fitting the replacement knob. It is common to find a green fluid present on the
control shafts.
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