F-2
Rev 2.2, 10/31/94
F.2.2 Digital Board Removal
1.
Disconnect the ribbon-wire jumper between the analog and digital boards. It is sufficient
to remove/disconnect only one end. Disconnect the ribbon wire connectors connected to
the Wheel, and to the front-panel circuit board. Disconnect the power supply connector
located at the front-right of the unit.
2.
Remove three 6-32 x 1/4 inch screws from the digital circuit board.
3.
Unlock the XLR connector inserts using the procedure found elsewhere in this section.
4.
Slide the digital board towards the front of the unit, then lift it clear of the chassis after
the connector bodies clear the connector shells. It may help to push on the connector
bodies from the rear of the chassis.
F.2.3 Power Supply Board Removal
1.
Disconnect the power supply connector located at the front-right of the unit.
2.
Remove four 6-32 x 1/4 inch screws from the power supply circuit board.
3.
Remove two 6-32 x 1/4 inch screws from the heatsink attached to U5.
4.
Remove two 6-32 x 1/2 inch screws from the IEC power connector at the rear panel.
5.
Disconnect the green chassis ground wire, at the chassis, by removing the nut securing it
to the chassis stud.
6.
Slide the power supply board towards the front of the unit, then lift it clear of the chassis.
F.2.4 Front Panel Board Removal
1.
Disconnect all of the ribbon wire connectors from the digital board.
2.
Loosen the setscrew on the Wheel and remove it.
3.
Rotate the two gain controls until you can see the two setscrews on the shaft coupler near
the circuit board mounted potentiometer. Loosen the screw located towards the front of
the unit and slide the knob and shaft out of the chassis. Repeat for the remaining gain
control.
4.
Remove the five button-head screws securing the front panel. Remove the front panel.
5.
Remove the five 6-32 x 1/4 inch screws securing the sub-front panel to the chassis.
6.
Lift the front panel board clear of the chassis.
F.3 XLR Connector Removal (Important!!)
The XLR connectors must be disassembled prior to removing either the analog or digital boards
from the chassis. After disassembly, the connector body remains riveted to the chassis and the
connector body remains with the circuit board.
Unlock the XLR connectors by inserting a 2mm slot-head screwdriver into the hole located
between pins 1 and 2 of the XLR connector insert. Twist the retaining lug CCW to unlock the
connector body. When separating the connector body from the shell, it may help to push on the
connector body from the outside (through the shell).
Caution
The circuitry within the 601 is static sensitive. Use
appropriate techniques to eliminate static electricity from
your body and from the surrounding area. If these
techniques are not familiar to you, you should refer
servicing of your 601 to the factory.
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