Applies to:
ShortCut SC-180 and SC-182 models
Warnings and Notices:
WARNING: Hazardous Voltage. Contact may cause electric shock, burn, or death. Disconnect all power from the unit prior to attempting any servicing of the equipment. Service should only be performed by qualified personnel.
CAUTION: Use proper ESD precautions when working on equipment to prevent damage to the internal components.
Symptom:
Opening the ShortCut to replace, repair or inspect.
Possible Reason(s):
Various
Solution(s):
The below information applies to all ShortCut models. However, there may be minor differences depending on the version.
Accessing the Unit Internals
Place the unit face down on a soft surface and remove the five screws around the outside edges of the unit at the front and sides. Holding the top and bottom together, turn the unit back over. Lift the top of the unit straight up about an inch. Place the speaker magnets on the top edge of the rear panel. Lift the unit open until you can see the wiring inside. Disconnect the green ESD Ground wire from the main board or power supply. Disconnect the front panel connector, and the SCRUB wheel cable if present (later model units connect the SCRUB wheel to the front panel board via a flex circuit). Disconnect the Display cable and the two-wire harness to the Display from the main board. Disconnect the audio cable to the front panel. Disconnect the Speaker connector and free the wires from the holding clips on the inside of the rear panel.
Software Update
To update the software, replace chips U1 and U2. If you have assistance to hold the front panel up, you can do this without disconnecting the front panel completely. Usually only the green ESD Ground wire and sometimes the jog wheel connections need be removed.
Hard Drive Removal
To remove the hard drive, remove the power and SCSI or IDE data cable connections and the drive power cable connector then turn the bottom panel upright on its back or side. While holding the hard drive, remove the four screws from the bottom panel directly under the drive. Note that in older units there may be two spacers on the two screws in the rear mounting holes. It is important to replace these to provide adequate front panel clearance at the front of the drive. When reinstalling them, hold the bottom panel upright on its back or side, insert the long screws into the two rear holes and place the spacers on them. Align the drive and start the screws into the mounting holes far enough to hold the drive securely. Connect the power and SCSI ribbon cable to the drive. Next, insert and tighten the front two screws, and finally tighten the rear screws.
Main Board Removal
To remove the main board, remove all screws on the back panel next to the Analog and Digital Input and Output XLR connectors (1 per connector), the two screws by the BNC connectors, the 1/2” nut on the headphone jack, and the retaining posts on either side of the Expansion and GPI connectors. Disconnect the connections to the power supply and hard drive. Remove the six screws holding the board to the bottom panel. Lift the board out by lifting the front edge then removing the connector hardware from the back panel.
Power Supply
To remove the power supply, remove the connections for the line input and DC voltage output, and remove the four 3/16” bolts (or #2 Phillips head screws) at the corners.
Scrub Wheel / Shaft Encoder Removal
The SCRUB WHEEL is attached to the shaft encoder with a hex screw accessed by removing the rubber cover around the outside of the wheel. In early units, there was a spacer between the wheel and the top of the shaft encoder to raise the wheel as the hole in it was drilled too deep. Subsequently some of these units do not have good contact between the set screw and the shaft, causing the wheel to come loose easily. The shaft encoder is removed by removing the nut under the Scrub Wheel.
Display Removal
To remove the display, remove the four screws that secure it to the front panel. Using a single edge razor or a sharp knife, carefully cut the silicone seal between the display module and the front panel away from the front panel. This seal is primarily to prevent dust from entering the space between the display and the lens. It does not need to be replaced. When replacing the display, clean the inside of the lens with a dry lint-free cloth if necessary. Also, do not remove the plastic sheet over a new display until just before you install it as static and the light adhesive from it attract dust to the front of the display module.
Front Panel Board and Rubber Buttons
The Front Panel Board and Transport Panel are removed together by removing the screws that hold them. When replacing them, be sure to separate them as much as possible within the limit of their mounting holes. This prevents the connector between them from “bottoming out”, which causes the lower row of pins to short to the contacts for the upper row. This in turn causes the meters to behave abnormally or not at all. Cutting the ends of the lower row of pins slightly prevents this problem.
ShortCut Front Panel Interconnect Modification
The buttons are in five sections. Replacing a button involves replacing its entire section. The sections are Function and Numeric (Hot Keys), QWERTY (Alpha) Keys, Edit Control Keys, Transport Control Keys, and Bleep.
Link(s):
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