Symetrix 601, Owner'S Manual

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F-1
Rev 2.2, 10/31/94
F.1 Top Cover Removal
1. Ensure that the 601 is disconnected from the AC power source.
2. Remove three 6-32 x 1/2 inch screws from each side of the chassis.
3. Remove two 6-32 x X 1/4 inch flag-head screws from the top cover
4. Remove four 6-32 x 1/2 button-head screws (you'll need a 5/64 inch allen wrench).
5. Remove one 6-32 x 1/2 inch button-head screw from the top-middle of the front panel.
6. Lift the top cover free of the chassis.
F.2 Circuit Board Removal
There are five circuit boards inside the 601.
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.
1. Ensure that the 601 is disconnected from the AC power source.
2. Remove the top cover using the procedure described previously.
F.2.1 Analog Board Removal
1. 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.
2. Remove the two 6-32 x 1/4 screws from the front edge of the circuit board.
3. Disconnect the ribbon-wire jumper between the analog and digital boards. It is sufficient
to remove/disconnect only one end.
4. Remove four 6-32 x 1/4 screws from the shield surrounding the analog board. Remove the
shield.
5. Unlock the inserts within the four XLR connectors. (see procedure elsewhere in this
section).
6. Slide the analog 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. Disassembly Instructions
Caution : These servicing instructions are for use by qualified personnel only.
To avoid electric shock do not perform any servicing other than that contained
in the operating instructions portion of this manual unless you are qualified to
do so. Refer all servicing to qualified service personnel.
Caution : Parts of the 601 use surface-mounted semiconductors. Removing and
replacing these parts requires special tooling and special techniques. This is not
a job for the faint-of-heart nor is it something that you should attempt for the
first, second (or even third) time Do not attempt this at home!. We strongly
advise that you should refer all servicing to the factory.
Any damage to the
601 that, in our sole opinion, resulted from improper surface-mount
technique or improper tooling is not covered by the warranty.
Warning: Lethal voltages are present inside the chassis. Perform all
service work with the unit disconnected from all AC power.