Emerson-Radio-and-Phonograph-Corp-Record-Changer 电路原理图.pdf

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1、MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS RECORD CHANGER PART No. 819003 AUTOMATIC OPERATION Leading 1. Turn the set on and the volume up and set the selector knob in the position for phonograph operation. 2. Turn the Spindle Cap (2) until is is as completely OUT OF LINE with the Spindle (3) as p

2、ossible. 3. If ten-inch records are to be played, rotate the Record Sup port (4) to the left, and for twelve-inch record operation rotate the Record Support to the extreme right. 4. Insert a maximum of 12 ten-inch records or 10 twelve-inch records on the Spindle shoulder and Record Support. 5. Swing

3、 the Hold-Down Finger (5) so that it rests on the top record. Starting To start operation, push the Starting Switch (6) to the ON position, then depress the switch button as indicated for reject. EMERSON RADIO Reject Records To reject a record, depress the Starting Switch button as indicated on the

4、switch housing. Shat Off 1. Remove any records remaining on the Record Support. 2. Depress the Starting Switch as indicated for reject and allow die Pickup Arm (1) to reset on the record. 3. Gently lift the Pickup Arm and return it to the Rest Post (8). 4. Push the Starting Switch to the OFF positio

5、n. Unloading 1. Rotate the Spindle Cap until it is aligned with the Spindle. 2. Turn the Hold-Down Finger aside. 3. Lift the records, tilting them slightly to clear the Record Support. MANUAL OPERATION Starting 1. Turn the set on and the volume up and set the selector knob in the position for phonog

6、raph operation. 2. Make sure the Spindle Cap is aligned with the Spindle and place the record over the Spindle and on the Turntable. 3. Push the switch to the ON position. 4. Place the Pickup Arm on the outer edge of the record to start operation. Shut Off 1. Allow Pickup Arm to complete its cycle a

7、nd reset on the record. Gently lift the Pickup Arm and return it to the Rest Post. 2. Push the Starting Switch to the OFF posidon. 3. Do not overload the changer. The maximum load is either 12 ten-inch or 10 twelve-inch records. Use modern records in good condition. ECCENTRIC (35) ECCENTRIC ROD (34)

8、 SPINDLE CAP (2) SPINDLE (3) SPINDLE ASSEMBLY COMPILED BY M. N. BEITMAN. SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS OPERATING DESCRIPTION This record changer is an automatic cam-type changer, featuring angle-button control and eccentric-spindle record s

9、election. Starting After the Single Control Button (6) has been turned ON, thus supplying power to rotate the turntable, automatic cycling may be started by depressing the button. This movement pushes the Trip Bar (31) forward, causing engagement with the Carrier Lever (14) and its attached cycling

10、Drive Wheel (10). The latter thus contacts the rim of the turntable and rotates with it. This motion is transmitted through the Flexible Coupling (16) to the Worm Drive (17). which in turn drives the Main Cam (15). Cycling the end of the change cycle, thus permitting the Pick-Up Ann A single revolut

11、ion of the Main Cam results in complete Procee across the record, automatic cycling of the changer. This includes selection of a Positive Trip Action record from the stack, lifting the Pickup Arm from its rest, and As the Pick-Up Arm approaches the Spindle, the Sweep setting the needle on the edge o

12、f the record. Upon completion Lever (21) hits the Positive Trip Screw (28) mounted on the of the revolution, the Automatic Trip Cam (13) engages with Trip Lever. This action reengages the drive wheel with the the block on the Trip Lever and pulls the Carrier Lever (14) turntable rim and starts a new

13、 cycle, back to its original position so that the cycling Drive Wheel Ten.|nch or Twelve-Inch Operation (10) is no longer engaged with the turntable rim. Adjusting the Record Support (4) to the ten-inch or twelve- Record Feed inch position lowers the Selector Rod (40) a definite degree. The lower si

14、de of the Main Cam (15) controls record selec- ength of the extension of this rod determines the position- tion. Motion of the Feed Cam Roller (19) about the cam jng c jtop Lever (25). The latter is the means of regula- results in a backward and forward movement of the Feed Sector t;ng distance the

15、Sweep Lever (21) and its attached Pick-Up Lever (18), thus engaging the Record Feed Pinion (20). This Arm travel before the arm is lowered to the edge of the record, in turn causes the Eccentric (35) to first rotate to the proper , , _ , . , Positive Trip position for record selection and to then re

16、turn, allowing the record to drop over the Spindle. T*”6 Pint of *he chan8cr may * by positioning of the Positive Trip Screw (28). Turn the screw Pick-Up Arm Movement , . . . . , . . . . r clockwise to delay tripping and counter-clockwise to trip earlier The upper side of the Main Cam (15) controls

17、Pick-Up Arm playing cycle. (1) movement. LIFT is imparted by motion of the Lift Pin along the vertical edge of the cam as the latter rotates. DIREO Pick-Up Arm Drop Point TION is controlled by engagement of the Main Cam with the An external strain exerted on the Pick-Up Arm may alter Sweep Lever Pin

18、ion (29). The Sweep Lever (21) is attached the drop point. To adjust, loosen the screw on the Sweep Lever to the Pick-Up Arm by means of a clamp (22) around the Clamp (22) slightly and reposition the Pick-Up Arm with re- Pidc-Up Arm Pivot Sleeve (23). A boss projecting from the to the Sweep Lever (21). upper side of the Main Cam displaces the Stop Lever (25) at (A COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN