RCA-Victor-Co-Inc-Record-Changer 电路原理图.pdf

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1、MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS RCaVictor Model Nos. 960001-1, 960001-2, 960001-3 Automatic Record Changer Features 1. This record changer is a two post drop type, non-inter mixing mechanism designed to play automatically a series of twelve 10-inch or ten 12-inch records of the standard

2、 78 RPM type. 2. The mechanism uses a light weight, low noise, crystal pickup cartridge, equipped with a long life sapphire point 3. The tone arm is automatically returned to the rest position and the power removed from the drive motor, after the mechanism has finished playing the last selection of

3、the stack. 4. The changer is equipped with an eccentric and closed circle tripping device. 5. A pickup shorting switch is incorporated which shorts out the pickup during record change cycle. This prevents noise from gears, cams and other moving parts from being ampli fied through the reproducing sys

4、tem. 6. The mechanical linkage between record support posts makes possible a single and simple operation on the part of the operator to change from 10 to 12-inch records or vice versa. 7. The changer can be used on either a 50 or 60 cycle power supply by the use of the proper spring sleeve slipped o

5、ver the shaft of the drive motor. 8. All gears and cams are disconnected while the records are being played. This removes the load on the motor and eliminates excessive friction and noise from moving parts which otherwise have a tendency to produce wow or rumble. Automatic Operation 1. Lift and turn

6、 the selector arm #1 in the front right-hand comer of the changer panel to a position engaging the slots in the selector sleeve. In so doing the arrows and numbers designating record size should be pointing toward the turntable spindle. 2. Load the records to be played on the separator arms with the

7、 desired selections upward and in the proper sequence. The last record should be on top. 3. Move control knob to reject position and release it. The changer will play the selections in the entire stack at which time the control knob will return to off position auto matically. 4. Lift and turn the se

8、lector arm to facilitate the removal of records on turntable. Note: To stop mechanism before the selections in the en tire stack have been played, move the control knob to off position, remove records on selector aims and lift and move the. tone arm to rest position. Model Cartridge 960001-1 . 39851

9、 960001-2 . 70332 960001-3 . 39851 96000-2 and 96000-3 have an additional pickup shorting switch which contacts roller on tone arm lever (17) and shorts out pickup while tone arm is in the rest position. Manual Operation Old. odd sized and home recording records should be played in Manual position.

10、1. Lift and turn selector arm until selector arms point out ward as for unloading records. 2. Place records to be played on turntable and move control knob to Manual position. 3. Place pickup on record. 4. When selection is finished playing, return the tone arm to rest position and move control knob

11、 to off position. Note: Do not move control knob to off position before placing tone arm in rest position, or cycling will result If this should occur do not handle tone arm. Place control knob in automatic position and allow cycle to continue until tone arm comes to rest before continuing with manu

12、al operation. Cautions 1. Never use force to stop or rotate turntable or any other part of the mechanism. 2. Do not play a chipped or cracked record as damage to sapphire may result. 3. Warped records may slide upon one another while playing and cause unsatisfactory reproduction. 4. Do not attempt t

13、o handle tone arm while mechanism is in cycle. 5. Do not allow records to remain on selector arms when not in use. particularly in warm climate. 6. Do not allow oil or grease to come in contact with the rubber tire on drive idler or any other rubber parts. 7. Do not attempt to move the tone arm hori

14、zontally when in the rest position, unless control knob is in the manual po sition. Lubrication 1. GREASEGears, all cams on large gear, tapered end of tone arm latch and tone arm lever with LUBRIPLATE #105 (Lubriplate Corp. 3211 South Wood St. Chicago). 2. OILAll shafts before inserting into bearing

15、 and all mov ing parts, except those to be greased, with AIRCRAFT IN INSTRUMENT AND MACHINE GUN OIL. SPEC. 2-27E (Delta Oil Products. Milwaukee. Wis.). Note: Keep grease and oil away from rubber parts such as drive idler, bumpers, etc. Do not oil or grease clutch engagement lever. COMPILED BY M. N.

16、BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS Continued, RCA Victor Automatic Record Changer Models 960001-1, -2, -3e Functions of Main Parts Motor The Junction o! the motor is to serve as a power source Jor the changer. Power is transmitted from

17、motor to turntable through the rubber-tired idler wheel. Control slide and associate parts A. General function is to provide a single knob con- V. Tone Aim Lever and Associated Parts A. Tone Arm Lever (17). fig. (3) Controls the horizontal movement of the tone arm. B. Tone Arm Locator Lever (16). fi

18、g. (3) Function is to control the tone arm lever in deter mining landing position ai the pickup, fig. (8). 43 SELECTOR ARM *2 10- SEPARATOR BLADE trol for the various operations shown on the escutch- ,2* | eon plate through its interaction with the changer mechanism. B. The power switch is mechanica

19、lly operated by the control slide through a linkage to correspond to mounting the various positions on the escutcheon plate. bolt C. Manual Reject Slide (27). fig. (3) 0R|VE 1. Manual positionWith the control slide in the manual position the formed end of the re- 57|0LE ject slide (27) fig. (16) eng

20、ages the dutch engage ment lever (33) and holds it in an up position so that the trip mechanism is inoperative. 2. Reject positionThe short formed end of the reject slide (27). near the mid-section, contacts part of trip lever (28) and trips the mechanism. FIG D. Tone Arm Latch (14). fig. (3) 1. Fun

21、ctions as a positive lock. fig. (12), for the tone arm whenever the latter is moved to the outside of the panel in all positions of the control slide other than manual. 2. Also functions as a partial lock. fig. (12). or de tent, for the tone arm lever (17) while the control slide is in manual. E. Ma

22、nual Lock Out (4). fig. (3) Function is to engage and retain the tone arm * locator (16). fig. (IS), in its outermost position while the control slide is set in the manual position. F. 10 and 12-Inch Set Lever (19). fig. (3) Function is to index the tone arm properly for VI 10 or 12-inch records, fi

23、g. (19). m. Spindle Housing. Gear Assembly, and _ Associated Parts These two main castings are assembled with other component parts into a major sub-assembly, which indudes a spindle and pinion. The assombly operates only in a counter-clockwise direction (viewed from bottom side) and provides a clut

24、ching and driving action for ail automatic operation. 5 A. Pinion Gear (37). fig. (5) 1. Operates as part of the dutch. v 2. Operates as a gear to drive the main gear through a change cyde. 3. Serves as a vertical stop for the spindle to which it is pinned. B. Clutch Engagement Lever (33). fig. (5)

25、1. Function is to engage projection on pinion gear to start, change cyde. C. Trip Lever Assembly (28). fig. (4) 1. Function is to hold the dutch engagement lever (33), fig. (4) in a position such that it dears the pinion gear (37). fig. (S). except when tripping for cycling. IV. Selector Arm and Bla

26、des 1. Function is to support the records and, together with the selector blades, to separate the lowest record of the stack and allow it to drop to the turntable during the change cyde. COMPILED BY M. N. BEITMAN. SUPREME 12* SEPARATOR BLADE TURNTABLE SPINDLE CONTROL KNOB SELECTOR KNOB MOTOR DRIVE S

27、HAFT 45 SELECTOR ARM *1 C. Booster Spring (67), fig. (3) A small piece oi round spring wire which pro vides a limited amount of spring tension inward, tending to push the pickup into the starting groove. Tone Arm Lilt Pin (51), fig. (24) Fundion is to control vertical motion of tone arm. Selector or

28、 Support Arm Gears (35). (36), fig. (3) Function is to transmit energy from drive mechanism- to selector arm and knives. Trip Plate (Knurled) (30). fig. (3) Contacts trip dog (31), fig. (4). for eccentric tripping. Trip Shoe (29). fig. (3) Functions as part of the closed circle tripping device. Segm

29、ents (23). (25) and Tie Plate (24), fig. (3) Constitute the mechanical linkage between separator arms. Drive Gear Stop Lever (34), fig. (6) Functions to stop and position drive gear after cycling. Tone Arm Retard Lever (26). fig. (4) Stabilizes horizontal movement of tone arm while in cyde. Miscella

30、neous Service Hints Rumble A. Remove turntable by lifting straight up and insped the drive mechanism for a defective idler wheel. (Rough rubber tire or very sloppy bearing.) B. Insped the mounting of the changer to determine whether or not the mounting damp nuts have been loosened. C. Check and repl

31、ace any microphonic tubes in thfi reproducing system. _ PUBLICATIONS 107 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS Continued, RCA Victor Automatic Record Changer Models 960001-1, -2, -3. Wow or Speed Variation A. Make certain the turntable is free to rotate and not rubbing

32、 on motor board or portion of drive mech anism. E With the mechanism out o! cycle remove the turn table by lifting straight up. The spindle being dis engaged from all portions of the drive mechanism should rotate freely when turned by hand. C. Check for badly wom idler as described in Item (1A). D.

33、Check for presence of grease on rubber tire of drive idler and the inner rim of the turntable. (Naphtha or carbontetrachloride will remove harm ful grease.) E. Bent turntable spindle. F. Insufficient tension of drive idler spring (57). fig. (1). Continuous Tripping (see sketches below) A. Trip lever

34、 (28) fails to hold clutch engagement lever (33). a. Loose or trussing trip lever spring (59). b. Bind in trip lever bearing. c. Formed edge on manual reject slide (27) touch ing trip dog (31) (bend away). E Bind in stop lever (34). fig. (2). C. Missing stop lever spring (61). D. Control knob fails

35、to return to automatic position due to bind in control slide, and associated parts. Missing spring (64), fig. (3). STOP-CON 25) 9uaid Feed-back or Howl This condition it caused by sound from the speaker getting back into the input of the amplifier. A. Inspect motor board mounting to determine whethe

36、r the damp nuts have been loosened. B. Make certain no portion of the mechanism is touch ing the cabinet. The mechanism should be free floating on mounting springs. C. Check and replace any microphonic tube in repro ducing system. Failure to Trip (see sketches below) A. Pickup jumping grooves due to

37、 improper pickup pressure, or foreign material clogging up sapphire SET SCREW BENEATH 41 O ei i/d CAM MOUNTING NUT _ 39 40 UNDER 39 - 24 _STOP-(ON 23) T 20 21 POWER SWITCH if) 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 6. Insu

38、fficient power to compete cycle. Continued, RCA Victor Automatic Record Changer Models 960001-1, -2, -3. B. Bind in trip dog (31). bearing or missing spring (60). C. Tripping adjustments improperly set. D. Trip lever spring (59) having too much tension. E. Burrs on trip lever (28). F. Bind in trip l

39、ever bearing. G. Bind in tone arm bearing. H. Clutch engagement lever (33) bent or binding. (It should be free to drop under its own weight when disengaged from trip lever.) -a - rVBURRS / EINDS 33 CLOGGED sm*fTt00“9HTN5,om CDIRT) am* V -A- - ROLLtB ON TOIP LCVifi SB A. Grease or oil on inner rim of

40、 turntable and rubber tire idler. B. Insufficient tension of spring (57). fig. (1). on drive idler. C. Defective drive motor. D. Binding in series of levers, pivots, etc a. Drive link assembly (20). fig. (2). b. Selector arm shaft assembly, fig. (1). c. Drive gear (32). fig. (4). shaft. d. Poor gear

41、 mesh due to misalignment or defec tive teeth. e. Bent record separator blades causing a jam. fig. (1). Records do not drop properly. A. Separator arms improperly timed. (See timing ad justments.) B. Bent separator blades. C. Bent turntable spindle. Improper pickup landing (adjacent sketches) A. Lan

42、ding adjustment improperly set. B. Bind in tone arm bearing. C. Bind of slide (18) and lever (19) on studs. D. Missing spring (65) or (66). E. Bent or improperly shaped lever (16). F. Missing or loose spring (68). DRIVE MOTOR PICKUP SHORTING SWITCH hit s SHH ) * /. * a Jy er 1 4 J m warn tiimm it 1

43、rTvTTTT lAI / 1 68 16 17 29 67 30 27 63 64 18 2 3 62 23 1 FIG. 3 COMPILED BY M. N. BEITMAN. SUPREME PUBLICATIONS MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS Continued, RCA Victor Automatic Record Changer Models 960001-1, -2, -3. D. Sapphire shield filled with foreign material, pre venting sapphire

44、from setting into grooves. E. Bent sapphire mounting thereby allowing sapphire guard to ride on record. G. Spring (66) having more tension than spring (65). H. Spring (67) out of position causing false edge on lever (16). I. Tone arm fails to move in because of bind In slide (4), or inissing spring

45、(64) keeping lever (16) latched. 9. Repeating grooves (see sketches below) A. Insufficient pickup pressure. B. Bind in tone arm pivot. Place control knob in manual position and move tone arm in toward spindle and back. After the end of the tone arm lever (17) (functioning as a de tent) leaves latch

46、(14) the tone arm should have free and smooth action. (If latch (14) is too positive, bend formed edge on manual reject slide (27) which contacts latch (14).) C. Check for bind in tone arm lift pin (51). “D 13. 14. Prematura tripping. A. Defective record. B. Trip shoe (29), fig. (3). improperly set.

47、 C. Trip lever spring (59). fig. (4). insufficient tension. D. Bind in trip dog (31). fig. (4). pivot. Noise coming from speaker during record change cycle. Pickup shorting switch tailing to short out pickup. No output. A. Defective crystal cartridge. B. Broken or bent sapphire mounting. C. Broken o

48、r shorted pickup cable. D. Pickup shorting switch making contact E. Inoperative reproducing system. Distorted output A. Defective pickup cartridge. B. Bent or loose sapphire mounting, allowing sapphire to ride irregular in groove. C. Sapphire guard filled with foreign material such as dust and lint

49、which accumulates on the records while in storage. (Remove with small brush.) Tone arm fails to go to rest position at die finish of die last selection (see sketches be low) A. Control knob fails to return automatically to off position. 1. Cam (41) fails to drop down, thereby preventing stud on stop bracket (12) from contacting it. 2. Missing stop bracket spring (73). 3. Missing stud on bracket (12). 4.