AC-201 4 VOLTAGE TRANSFORMER

           REMOVING THE AMPLIFIER FROM THE CASE

Remove the cover from the unit, lift out the turntable platter and set it aside. Turn the unit upside down onto a pillow, foam or other material, be sure it is thick enough to support the amplifier and protect the tone arm. Remove the four screws, one near each spring foot. AT THIS POINT THE CHASSIS IS FREE FROM THE CASE AND EXTREME CARE SHOULD BE USED TO PREVENT DROPPING EITHER THE CASE OR CHASSIS. Holding the chassis and the case together, carefully turn the entire unit over to its upright position. The chassis can now be lifted out of its case, lifting the front first so as to clear the jacks on the rear panel.

               INSPECTION AND FAMILIARIZATION

Turn the unit upside down on the padding with the controls toward you. The main circuit board is on the right hand side, note how the wires connected to the board are routed. MAKE CAREFUL NOTE OF HOW THE WIRES TO THE POWER MODULE AND TRANSFORMER ARE ROUTED. There are two slotted screws holding the left side of the main board in place. On the right hand side of the chassis, on the outside, there are 4 slotted screws holding the heat sink in place.

               HINGING THE MAIN BOARD OUT

            1. Remove the two slotted screws on the outside right of the chassis closest to the top deck.

            2. Remove the two slotted screws on the left side of the main board.

3. Tip the board slightly upward from the left end and unplug the multi-colored cable at the center edge and the small plug next to it.

            4. Unplug P6 from J6, the cable going to the transformer.

             REPLACEMENT OF POWER MODULE/TRANSFORMER

            1. Remove the hum shield from the transformer, held in place with two screws.

2. Remove the transformer being careful not to scratch the top deck when removing the 4 screws and nuts.

            3. Remove the green chassis ground wire from under the nut and standoff.

            4. Remove the power entry module.

            5. Unsolder the small black wire from terminal F.

            and the small white wire from terminal D.

6. Cut the plastic ties to separate the wires in step 5 from the transformer wires. Set the old module and transformer aside.

                 INSTALL THE NEW MODULE/TRANSFORMER

            1. Solder the black wire to terminal F of the new module

and the white wire to terminal D.

2. Install the power entry module, insuring the switch is toward the transformer location. Route the wires to the transformer under the power module.

            3. Install the green ground wire under the nut and standoff.

4. Install the transformer being sure the wires from the power module run between the transformer and the back of the set.

            5. Reinstall the transformer hum shield.

REASSEMBLY

1. Plug in J6 and swing the circuit board into place temporally. Route the wires from the transformer to J6 along the top of the power module.

2. Reconnect the other two cables, BE SURE THE MULTI COLORED CABLE IS IN PLACE CORRECTLY, PERMANENT DAMAGE WILL RESULT IF IT IS ONE PIN OFF EITHER WAY.

3. Replace the 4 screws holding the circuit board in place, two in the board and 2 on the right side of the chassis.

            4. SET THE POWER SELECTOR TO PROPER VOLTAGE.

            5. Check the unit for proper operation.

            6. Put the set in the case and secure with 4 screws.