Philco-Radio-and-Television-Corp-L-changer 电路原理图.pdf

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1、MANUAL OF 1939 MOST POPULAR SERVICE DIAGRAMS PHILCO Model RECORD CHANGER OPERATING INSTRUCTIONS The Model “L” Record Chongcr plays seven 12 or eight 10 Keconis automatically. The last record remains on the turntable and repeats as long as the Record Changer is in operation. Records may be repeated a

2、s often as desired by raising the record removing arm at A Fig. 1 to the upright position. To reject a record and play the next record below it, pull the latch lever at L Fig. 1 forward. To adjust the record removing arm to handle 10 records .set the record removing arm change lever at D Fig. 1 oppo

3、site the number 10 stamped on the base plate. For 12 records set the lever opposite the number 12. To adjust the pickup to play 10 records, posh the pickup stop at K Fig. 1 back. (Away from the pickup neelle). For 12 records pull the stop forward (toward the needle) as far as it will go. Some units

4、are equipped with two speed motors, and others doth 78 RPM motors. When the two speed motor is used change from one speed to the other by simply moving lever at F Fig. 1 to position desired. To start motor, throw switch at N Fig. 1 on the “on” position. 5 Er MOTOR SPEED The motor speed is adjusted b

5、y means of a lever at C Fig. 1 which is mounted under the turntable. The direction of swing to fast or slow is indicated by the legends F and S on the base plate. 33-1/3 RPM 78 RPM SHIFT (Two-speed motors only) Move the speed change lever at F Fg. 1 as far as,.it will go in the direction of swing in

6、dicated by the legends 33-1/3 and 78 on the base plate. If adjustment of the speed change lever is required for any rea.son, proceed as follows: First loosen the screw which COMPILED BY M. N. BEITMAN. SUPREME PUBLICATIONS clamps the lever to the motor shaft. This shaft is provided with a screw-drive

7、r slot in the end. Next, using a screw driver, turn this shaft in a clockwise direction until you feel it strike the .stop. The motor is now in the 33-1/3 RPM position. Now set the lever against the lug provided in the base plate and opposite the legend 33-1/3 and tighten the clamp screw. This place

8、s the lever in the correct position on the motor shaft. The final step is the adjustment of the eccentric bushing at G Fig. 1 which limits the throw of the lever. First loosen the screw which holds the eccentric bushing. Next, throw the speed changer lever to its farthest 78 RPM position, (using car

9、e that the lever does not slip on the motor shaft). Then turn the eccentric bushing around until it touches the side of the lever, and tighten it in place with the screw provided. TRIP MECHANISM The trip mechanism is the trigger that sets the Record Changer in motion. This is done by allowing the la

10、tch bar at 0 Fig. 1 to drop in front of, and be actuated by the cam at P Fig. 1. This cam is driven by the motor and is in motion as long as the motor is running. If this mechanism does not operate smoothly, the precautions outlined in succeeding paragraphs should be observed. First of all, make sur

11、e that the square pin in the latch lever at U Fig. 1 latches properly in the notch in the lift lever at I Fig. 1. When latched, the notch should be engaged approximately one-half of its depth. The depth of engagement is adjusted by means of the eccentric washer and locking screw at J Fig. 1. Now run

12、 the Record Changer through its cycle. If the square pin fails to engage the notch in the lift lever, first check the tension of the latch spring at H Fig. 1 to insure that the notch can engage the pin. Next check the tension of the reset spring at E Fig. 1. This reset spring .should not be under te

13、nsion when the latch bar is latched but should have enough tension when the latch bar drops back off of the cam to cause the square pin to over travel the notch in the lift lever. IMPORTANT Before attempting to change the tension of any spring, be sure that the parts involved work freely without any

14、 tendency to bind, as of course any binding condition would preclude proper operation. The Reconl Changer is adjusted at the factory to trip on a spiral trip groove record when the phonograph needle is l?t from the edge of the hole in the center of the record. MOTOR LUBRICATION The motor installed i

15、n the Record Changer is governor controlled, with all gearing enclosed, and leaves the factory lubricated for proper operation. For maximum satisfaction, lubricate the motor at regular intervals with SAE No. 10 oil. Please do not use any other grade of oil. The governor disc engages with a ring of hard felt. This felt is impregnated with a lubricating solution sufficient for proper operation for approximately a year under normal conditions. 109 收音机爱 好者资料库 RadioFans.CN