REVISION C
BMX SERIES III CONSOLE
99
PACIFIC RESEARCH & ENGINEERING
2.
Remove the defective lamp using the rubber EAO Lamp Removal Tool (PR&E #70-41).
3.
Install the replacement 14 volt, .08 amp lamp (PR&E #12-51) into the switch, and carefully
snap the lens back into the body of the switch.
The CUE, SOLO and Send ON buttons are EAO series 19, and may be relamped by removing the button
cap by hand and using the rubber EAO Lamp Removal Tool (PR&E #70-23) to extract the miniature
bi-pin lamp. Note the orientation of the square cap’s tangs as it is removed. The cap must be reinstalled
in the same orientation. Install the replacement 12 volt, .07 watt lamp (PR&E #12-46) into the switch,
and gently reinstall the button cap.
6.1.3 Button Replacement
The square and rectangular “winkeye” button caps can be removed by applying even pressure to the back
of the cap to dislodge it from the switch shaft. This can be accomplished using a two-prong device, such
as a needlenose pliers. It may take considerable force to remove the button, so exercise caution.
Carefully snap the replacement button onto the switch shaft.
6.1.4 Collet Knob Removal
The knobs used for the console’s rotary controls are attached to the pot and switch shafts with collets
instead of set screws. The machined brass collets provide the advantages of true alignment and
concentricity with the axis of rotation, no set screws to score the shaft , the ability to clutch slip when
excessive force is applied, and no holes in the side of the knob for the set screws. To remove a collet
knob, carefully pry off the top cap of the knob using a thin blade or similar tool, then use the appropriate
end of PR&E tool #70-44 to loosen the nut on the collet (as shown in Figure 6.1).
Once the nut is loosened, the collet should release from the shaft. This nut should not need to be removed
unless the collet refuses to release.
6.2 TROUBLESHOOTING (MODULE REMOVAL)
The modular construction of the console greatly enhances troubleshooting, since module substitution
will usually isolate any problem.
FIGURE 6.1 COLLET KNOB REMOVAL
PR&E #70-44
COLLET KNOB
(WITH CAP REMOVED)
COLLET NUT
LOOSEN