Galvin-Mfg-Co（Motorola）-Changer 电路原理图.pdf

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1、RECORD SUPPORT - RELEASE RECORD CHANGER MODEL RC-36 To adjust the RECORD SUPPORT, press down on the RECORD SUPPORT RELEASE and move the record support to the dealred position. FICURE 1. RECORD SUPPORT ADJUSTMENT PHONOGRAPH CONTROLS OPERATION SPEED. The SPEED control determines the speed at which the

2、 turntable revolves. You must set this control to the position corresponding to the playing speed of the records you wish to play, viz., record speed 33 RPM, SPEED control to 33; record speed 45 RPM (large center-hole records), SPEED control to 45; or record speed 78 RPM, SPEED control to 78. CAUTIO

3、N: The SPEED control can only be moved clockwise from a playing speed position, but may be moved counterclockwise or clockwise, one position, from an OFF position. To stop turntable - rotate SPEED control clockwise. REJECT. The REJECT control Is momentarily turned clockwise and released to start pla

4、ying action or to reject a record before it has completely played. OPERATING PROCEDURE 1. Turn the radio power switch on and the phono-radio control to the. phono position. 2. Select the appropriate center poet for the records you desire to play. a. Two spindles are provided; one spindle for small-h

5、ole records and one for large-hole records. b. To play small center-hole records, insert the small diameter spindle into the hole in the center of the turntable and rotate the spindle until the pin of the spindle drops into the slot in the turntable bushing. c. To play large center-hole records, ins

6、ert the large diameter spindle into the turntable hole and turn the apindle counterclockwise until the spindle reaches a atop. NOTE: If the two metal separator discs of the large spindle are seen protruding from the spindle, turn the spindle shaft until they disappear inside the spindle, then insert

7、 the spindle into the turntable. d. To remove a spindle from the turntable, merely lift the spindle straight up from the turntable. 3. Adjust the RECORD SUPPORT to the correct position according to the size record you desire to play. a. Three positions of the record support are provided, i.e., a sep

8、arate position for playing 7-inch, 10-inch, and 12-inch records (ace Figure 2). b. To adjust the RECORD SUPPORT press down on the RECORD SUPPORT RELEASE and move the RECORD SUPPORT to the correct position according to the size records being played. The RECORD SUPPORT will lock in position (ace Figur

9、e l). NOTE: Although the ledge of the RECORD SUPPORT Is not used when playing 7-inch 45 RPM records, the RECORD SUPPORT must be in the 7-inch playing position. 4. Load the records. a. Raise the RECORD CLAMP to a vertical position. b. Place a stack ofrecords over the center post in the desired sequen

10、ce, with the last record to be played on top. Rest the records on the ledge of the FECOFD SUPPORT and on the off-set of the spindle when playing snail-hole records. If you are playing large-hole records, place the records over the spindle and rest them on the off-sets of the large spindle. 收音机爱 好者资料

11、库 RadioFans.CN MANUAL OF 19S0 MOST-OFTEN-NEEDED RADIO DIAGRAMS MOTOROLA Record Changer Model RC-36, continued d. Cently lower the RECORD CLAMP on the records. NOTE: DO NOT LOWER THE RECORD CLAMP WHEN PLAYING 7-INCH 45 RPM RECORDS. 5. Adjust the SPEED control to the position corresponding to the reco

12、rd speed of the records you are playing. 6. Momentarily turn the REJECT control clockwise. a. The bottom record will now drop to the turntable, the pick-up arm will lift, swing in, and drop to the turntable; record playing will now begin. b. The REJECT control may he turned momentarily clockwise to

13、reject a record before it has completely played. NOTE: Never touch the pick-up arm while the record changer is in a changing cycle. 7. At the conclusion of playing and as the last, record is being repeated, lift the pick-up arm and move it to the right. 8. Turn the SPEED control clockwise to the OFF

14、 position. NOTE: This stops the turntable, but the motor will continue to run until turned off either with the phono control or power switch on the radio panel. 9. Turn the power awitch on the radio panel off. TO UNLOAD RECORDS 1. Raise the PECORD CLAMP. 2. Lift the records straight up from the turn

15、table. Do not apply pressure to the top record. Keep your thumbs free,. NOTE: When removing k5 RPM record. If the two metal separator discs of the large spindle are seen protruding from the spindle, lift the spindle, with the records, from the turntable and turn the spindle shaft until the discs dis

16、appear inside the holder before removing records. A. To play 7-inch small-hole records, press down on the RECORD SUPPORT RE LEASE and move the RECORD SUPPORT to the exreme outward position. Pest the r cords on the ledge of the RECORD SUP PORT and on the off-set of the small spindle. B. To play 10-in

17、ch records, press down on the RECORD SUPPORT RELEASE and move the RECORD SUPPORT to the middle posi tion (l-l/2 inches in from the extreme outward position). Rest the records on the ledge of the RECORD SUPPORT and on the off-set of the small spindle. C. To play 12-Inc: records, press down on the REC

18、ORD SUPPORT RELEASE and move the RECORD SUPPORT to the extreme in ward position. Seat the records on the edge of the RECORD SUPPORT and on the off-set of the small spindle. D. To play 7-inch large-hole records pr as down on the RECORD SUPPORT RE LEASE and move the RECORD SUPPORT to the extreme outwa

19、rd position. Rest the records in the off-set of the large epindle. FICURE 2. RECORD SUPPORT IN RECORD PIAYINC POSITIONS 收音机爱 好者资料库 RadioFans.CN MANUAL OF 19S0 MOST-OFTEN-NEEDED RADIO DIAGRAMS MOTOROLA. Record Changer Model RC-36, continued ARM HEIGHT ADJ (ACCESSIBLE THRDUGH HOLE IN REAR) -13B -32 53

20、 SET-DDWN ADJ. ID9 FIGURE 3. TOP VIEW OF RECORD :HANGER WITH TURNTABLE REMOVED THEORY OF OPERATION Fefer to Figures 3, k, 5# 6, 7 this controls the pick-up arm set-down point. While the arm ia being held over the set-dcwn point by (24c), continued rotation of the cycle gear (9) makea the pick-up arm

21、 shaft (33) ride down the incline (21D), lowering the pick-up arm onto the record. As the slide channel (21) approaches the end of the cycle (fully forward position) the set-down flag (24c) is moved out of the way by the restoring lever (21H) to give the pick-up arm complete freedom of movement duri

22、ng playing of the records. When the elide channel moves fully forward, the drive clutch lever (118) rides up the trip lever incline (21A) and disengages the drive clutch lever dog (118b) from the drive dog screw (120) in the turntable, thus ending the cycle. PICK-UP ARM SET-DOWN POINT Hie point at w

23、hich the pick-up arm drops to the turntable for either 7-inch, 10-inch or 12-inch records is deter mined by the position of the set-dcwn f-ag (24c). When the record support assembly (64) is adjusted for a specific site record, the movement of the record support causes rotation of the gear and pinion

24、 shaft assembly (60A) through the rack gear (64b) on the record support. Since the gear and pinion shaft assenibly (60A) engages the set-dovn gear (28b) and the set-dcwn cam (26A) is attached to the set-down gear, any movement of the record support will cause the set-dcwn cam to turn. The set-dcwn c

25、am stud (24b), on the slide plate and spring assembly (24a), rides with the set-down cam due to the tension of the slide plate spring (27); therefore, any action of the et-dovn cam will affect the position of the set-down flag (24c). 45 RPM RECORD DROP The 45 RPM spindle shaft, when dropped in the t

26、urntable center hole, fits into the slot in the timing stop (14). When the change cycle begins and the slide channel (21) is making its backward movement, the reject plate (16) moves forward due to the eccentric form of the drop cam (11) riding on rolle;- (16A) and the tension of the spring (17), pu

27、lls the reject plate (16) forward until it contacts timing stop (14), preventing it from rotating. Since the turntable with the 45 REM spindle continues to rotate and the timing stop (14) and spindle shaft (153) remain stationary, the two pinion gears (155) in the upper section of the spindle rotate

28、 around the spindle shaft (153) gear. The eccentric extending from the upper end of the two pinion gears (155) runs in a slot in the molded record supports to produce the necessary action which causes the supports to move in against the tension of spring (156). As the plastic record supports recede,

29、 the separator disc - mounted above each record support separate the lover record of the stack and support the r-snaluduig stack while the lover record drops to the turntable. With continued rotation of the spindle the record supports, due to the action of spring (156), will move out to support the

30、record stack, while the separator discs recede into the spindle. When the slide channel (21) is making its forward movement, the reject plate vl6) moves back releasing the timing stop (14) allowing the timing stop and the spindle shaft to revolve for the playing of the record. FIGURE 7. MOTOR it sho

31、uld protrude a minimum of 1/32 inch from the record support during the record dropping por tion of change cycle. If adjustment is required, proceed as follows: 1. Remove the cabinet back or remove the record changer from the cabinet, as required, to gain access to the rear of the record changer. 2.

32、Turn the reject knob to place changer in cycle and rotate turntable by hand until record push-off lever (71) is at ite point of maximum forward travel. 3. Turn the push-off adjustment screw (60B) until push-off lever (71) protrudes 1/32 inch beyond lip (6ltA) of record support. TURNTABLE DRIVE PIN A

33、DJUSTMENT If B clicking noise is heard while a record Is playing, the drive dog adjusting screw (120) on the bottom of the turntable is touching the drive dog (118B). To remedy: 1. Remove the turntable. NOTE: Do not remove the drive clutch lever (118); also do not lose the bearing washer (115). 2. L

34、oosen the hex nut (121) and turn the drive dog adjusting screw (120) counterclockwise to bring the screw further away from the drive dog. CAUTION: Do not turn the screw too much, since the screw will not engage the drive dog and, as a consequence, the changer will fail to cycle. 3. Tighten the hex n

35、ut (121). TRIP ARM ADJUSTMENT down arm (36)requiresj * * rBCOTd * trlpB before * COTd “-ted its play, the set- 1. Readjust the needle set-down setecrew (53) (see paragraph on NEEDLE SET-DOWN ADJUSTMENT). 2. If adjusting the setscrew in step 1 does not correct the fault, remove the cabinet back or re

36、move the record changer from the cabinet, as required, to gain access to the rear of the record changer. 3. Turn the set-down adjustment screw (53) until the end of the setscrew is even with the pick-up arm. correctly? BajuBtment Btud loosen the nut and remove the needle from the cartridge. Replace

37、with Motorola needle. Part No, 59691908. Insert the replace ment needle in the cartridge needle receptacle and tighten the knurled nut, 2, If the needle is not held in place vith a knurled nut, merely pull the needle from the cartridge using your fingers or pliers (see Figure 10), Replace with Motor

38、ola needle. Part No, 59K691909* The replacement needle is partly encased in a small guard to protect the needle point; push the needle into the cartridge needle re ceptacle and remove the guard. Friction vill hold the needle in position. FIGURE 9. SET-DOWN ADJUSTMENT SETSCREW TURN SCREWS TO MOVE PIC

39、K-UP ARM PROM SPINDLE TURN SCREW- TO MOVE PICK-UP ARM TOWARDS SPINOLE CARTRIDGE REPLACEMENT FIGURE 11, JVo types of cartridges are being used, they are interchangeable. To remove the cartridge, merely remove the cart ridge retainer clip (U8) and disconnect the pick-up leads, IMPORTANT: After cartrid

40、ge is replaced, check the needle set-down point as outlined in NEEDLE SET-DOWN ADJUSTMENT paragraph, TO REMOVE THE TURNTABLE 1, Remove the turntable retaining clip, 2, Lift the turntable straight up from the base plate. Be sure the bearing (116) and bearing washer (115) do not get lost or dirty. 3,

41、When replacing the turntable, it will be necessary to center the drive clutch lever (ll8) and bearing washer (115) to allow proper seating of the turntable over the spindle post, it. Replace the turntable retaining clip, TO REPLACE THE DRIVE CLUTCH LEVER 1, Place the changer mechanism in the rest po

42、sition (slide channel (21) in full forward position) vith the trip flag bracket (21B) engaged in the trip lever arm (21C), 2, Place the drive clutch lever (118) in position with the weighted end (11$A) of the drive dog resting on the trip lever (21A), TO REMOVE THE DRIVE GEAR 1, Remove the turntable

43、 and drive clutch lever (ll8), 2, Lift the drive gear (117) straight up from the spindle post, 3 Whan replacing the drive gear (117) it is important that the changer be timed correctly. To time, position cycle gear so that cycle gear roller (9A) is directly in line with the spindle post (1A) and pul

44、l the trip lever (21A) forward so that trip flag (21B) falls in and locks It in position. Now place the drive clutch lever (118) in position on drive gear (117) end mesh the gears so that weighted end of clutch lever (118) rests on the lowest edge of the trip lever (21A) incline. Check the timing by

45、 playing a stack of i*5 RPM re cords. If a record of the stack fails to drop during a cycle, move the drive gear (117) one tooth and play another stack of records to again check the timing, TO REMOVE THE MOTOR ASSEMBLY 1, Disconnect the power lead, 2, Remove one machine screw (131) from the bottom o

46、f the record changer securing the motor assembly to the base plate. 3* Remove the turntable from the record changer, U. Remove the two machine screws (llh) securing the motor assembly to the changer 5, Remove the speed control knob, MANUAL OF 19S0 MOST-OFTEN-NEEDED RADIO DIAGRAMS MOTOROLA Record Cha

47、nger Model RC-36, continued PICK-UP ABM MOUNTING PLATE ASSEMBLY REPLACEMENT Should it ever become necessary to remove the pick-up arm mounting plate assembly (2k), the following precautions should be observed when replacing the assembly* 1. Be sure that the hole in the set-down cam (28A) lines up wi

48、th the hole in the mounting plate and that the set-down cam stud (2hB) cm the set-down flag (24c) la cm the outside of the cam. 2. Be sure that the set-down flag (2kC) la In a position so that it can be actuated by the restoring lever (21G). 3* The record support must be In the 12-lnch playing posit

49、ion when replaced. TO REMOVE THE SLIDE HINGE AND SLIDE BRACKET 1. Slide hinge (1U5) Is secured with a spring clip (149). To unlatch the slide hinge: Place a folded piece of paper on both sides of the slide hinge, between the slide hinge and the slide Hover (143) and pull the paper forward, simultaneously pulling the slide hinge upwards. See Figure 12. 2. Four machine screws secure the slide bracket (l46) to the record support and slide cover (143). SERVICE HINTS STANDAR