RCA-Victor-Co-Inc-10-51 电路原理图.pdf

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1、PAGE 46-A MODEL 10-51 FIELDOF CONE SPEAKER IN AP -952 REPLACED BY CHOKE COIL IN A P-997 110 VOLTS AC. trv-a76 AC S UX-111.3. Uk116.21. Mew* 7118Yorea1. Y!LeSPV.,Y caw. Ardormow JIArrew Ate* CabSeeet NOTE -A P-997 HAS 1.1 OUTPUT TRANSFORMER. A P-952 HAS 25:1. ibtet Coble Sect tett DetaSetae bi le no

2、boot %vett fi _. 17.1477o- aa Z.:1. et 0Ibeet%. 7: 7.77.7.1:k. -s .,.-t._ ibtebbbe, el., IteeSiete%be ea _ 4 CsAANAmor ow Um* -.sea Coon ora= can -Wiring Diagram for Automatic Orthophonic Electrola No. 10-51 Showing connecti-,ns between terminals of the various units.The 110 -volt wiring is shown by

3、 extra heavy lines. Rs. Nelv rANC Wiring Diagram 10-51 above serial No. 800 771floo C Ci* t010.11111111 LLEI ,PyCa .HI Marl ISM IAA 1St. Isscr, Stett- IttPicai.itte pso,s inttlitt Silt OSSM 1.511 Stilts IS 117 II, I Wiring Diagram for Automatic Orthophonic Electrola 10-51 above serial No. 800, 05,11

4、 CMS .,c2 eV RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A. 收音机爱 好者资料库 RadioFans.CN PAGE 239-A Re -Adjusting Tone Arm After installing the electric pickup, it may be necessary to re -adjust the overall horizontal position of the tone arm in order to permit the needle to

5、lower onto the smooth outside rim of the revord. a.loosen the 12 eccen- tric stop clamping screw in the taper tube arni casting. b. With a small rod or nail,turn the eccen tric stop as shown in theillustration.In some casesit may be necessarytoturn TAPER TUBE ADJUSTING SCREW 10 11 9 8 7 5 31 30 29-;

6、 the stop to the right, and in other cases to the left. c. Check thesetting after succeseive trials until the proper posi- tionis obtained, and then re -tighten the clamping screw. 28 252721 24 23 2612 Fig. 1 Name of Part 1.Motor Plate 2.Lifter Ring Post Front 3.Lifter Ring Post Rear 4.Sound Box Lif

7、t Lever Stud 5.Slide Spring(Not Shown) 6.Main Slide 7.Intermediate Gear 8. Cam Gear 9.Index Lever 10.Index Shaft 11.Sound Box Control Lever 12.Clutch Release Lever 13.Sound Box Lifting Lever 13a Nut Screw 14.Collar 15.Shaft 16.Nut 17.Trip Lever 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31.

8、 32. 33. 34. 22 17 13* 14 16 15 4 Taper Tube Return Lever Connecting Link Spring Spring Spring Motor -60 Cycle -25-30 Cycle -Universal Screw(3 Used) Thrust Washer(Not Shown, Pawl Carrier Clutch Wheel Spring Index Control Reject Lever Spring Taper Tube Assembly Screw(6 Used, Screw(2 Used) NOTE: -The

9、operating unit of the Automatic Electrolas differs from the Automatic Victrolas in the taper tube return lever No. 18, Fig. 1. All 10-50 unite above serial No. 8950, all 10-51 above serial No. 800, and all 10-70 and 9-55 have a motor plate with provision for mounting the elec- tric pick-up shunt swi

10、tch and the remote reject control. SERVICING 1. Should the sound box (or pick up) fail to awing into the record groove after the tone arm has descended to the playing position: Check to see that the machine is level. If the right side (facing the front of the machine) is lower than the left, the sou

11、nd box will not swing over into the record groove. If the left side is low the sound box will skip the first few grooves of the record. This is because the tone arm is mounted at a slight angle to the horizontal, allowing the arm to swing into the playing groove by force of gravity after lowering up

12、on the smooth portion of the record. 47 45 AUTOMATIC RECORD CHANGER US ED WITH -Automatic Victrolas and Electrolas 10-50, 10-51, 10-70 and 9-55 2. If the record lift ring (No. 52, Fig. 2) fails to pick up record: a. The magazine spindleIs bent either towards the front or back of the instrument. b. T

13、he magazine spindle (No. 36, Fig. 2) should either be lowered or raised slightly as the case may warrant, by adjusting screw (Part No. 19322). c. The record is warped. d. Lift ring shaft is bent. e. Operating unit and magazine stand are located either too far away or too close together, and will not

14、 permit the records to mount the buttons properly. Remove magazine stand and file bolt holes in board, if neces- sary, so that the stand may be placed in the correct position with reference to the operating unit. 3. If the record drops into the drawer after being lifted from the magazine spindle or

15、fails to line up with the turntable spindle: a. The magazine spindle is bent either towards the front or the back of the instrument. b. A warped record has been used. c. Warped or bent lift ring. d. Lifter ring posts (2 and 3, Fig. 1) out of line. 4. Should binding of the record lift pad (No. 50, Fi

16、g. 2) occur: a. Remove the shaft (No. 49, Fig. 2.)If bent, it should be replaced with a new shaft. b. Note if sides of record lift pad are binding against nut of latch and link of record lift ring.If necessary, file the sides so as to clear the ring. A bent shaft causes failure of the pad and lift r

17、ing to rise simultaneously. The record consequently is not raised from the turntable equally and is thus forced by the revolving turntable to strike the side of the record chute. This condition may cause breakage of records. ADJUING SCREW PART 19322 NUT PART 16251 35 36 37 38 525150 49 48 46 SPRINGP

18、ART 16998 Fig.2 Name of Part 35.Screw Nut (Not Shown) M. Magazine Spindle 37.Magazine Stand 38.Tilting Lever 39.Screw Nut(Not Shown) 40.Nut 41.Latch 42.Base 43.Screw 44.Screw 39 40 /1111-141:=Bo V:=9W, 43 44 45.Screw Nut (Not Shown) 46.Record Guide 47.Latch 48.Link 49.Shaft 50.Record Lift Pad 51.Fel

19、t 52.Record Lift Ring 53.Felt 54.Screw 55.Switch 56.Roller 5. If the lift ring fails to discharge a record into the drawer after it has been played: The small spring (Part No. 16998) shown In Fig. 2 may be broken or disconnected. I1RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U

20、. S A. 收音机爱 好者资料库 RadioFans.CN PAGE 240-A AUTOMATIC RECORD CHANGER Fig. 3 Name of Part 57.Nut 60.Felt 58.Screw 61.Screw 59.Trip Lever 62.Latch Trip 6. If the brake does not shut off at end of pro- gram: a. The small screw (No. 58, Fig. 3) on the automatic stop is not properly adjusted. b. Set screw

21、(No. 70, Fig. 4) located under brass plate on switch trip may be loose. c. One of the springs (No. 63 or No. 64. Fig. 4) on the brake may not be properly adjusted, or has become loosened. d. The electric switch contacts are sticking. On 10-50 below serial number 8951 and 10-51 below serial number 80

22、1 proceed as follows: Remove the bakelite cap of switch and spread con- tact points to permit easier operation. WHEN TAK- ING THE SWITCH APART BE CAREFUL TO OB- SERVE THE POSITION OF THE INSULATING WASH- ERS SO THAT THEY CAN BE PLACED IN PROPER POSITION WHEN REASSEMBLING. On all other automatic inst

23、ruments the following procedure should be used: Remove bakelite top, loosen screws holding contact mechanism and with switch in closed position, move switch towards the shoulder of the latch, leaving enough clearance so that there is no pressure on movable contact arm. This will allow the contacts t

24、o open to their maximum point and prevent arcing and sticking. File and clean contacts. e. Warped lift ring. 63. 64. 65. 66. 67. 68. 69. 70. 71. Name of Part Spring Spring Top Plate Switch Lever Nut Cord Plug Screw Bottom Plate and Switch Assembly 10-50 Below Serial No. 8951 10-51 Below Serial No. 8

25、01 All Other Automatics Bottom Plate Only 72.Spacer 73.Switch (Used with Bottom Plate 20305A) 7. Failure to reject a record when the reject button Is pushed may be caused by: a. Reject button having been forcibly pushed in, bend- ing connecting link to reject mechanism. ThN can be remedied by removi

26、ng the front panel on which the index lever is mounted and bending the reject mechanism back to its original position. b. Defective reject magnet circuit. (Models 10-70 and 9-55). 1. Bad switch -dirty contacts. 2. Burnt out coil. 3. Broken wiring. Fig. 4 8. Continued rejection when the button is not

27、 pushed may be caused by: a. The button being stuck, having been forcibly pushed in by the operator. b. Heavy grease or foreign matter in the cam notches of gear (No. 8, Fig. 1). c. Excessive pull in spring (No. 28. Fig. 1) or worn teeth on pawl. d. Worn trip lever e. Mechanism improperly timed. CAU

28、TIONUse nothing but specified springs through- out. 9. If the point of the needle rides over several grooves in coming to rest on the record, or does not rise high enough to clear the record on its return, proceed as follows: a. Place Index lever in Victrola or Electrola posi- tion and permit mechan

29、ism to operate until the tone arm is in playing position and free. b. Note distance of point of needle below top of turn- table. This should be between h andof an inch. c.If the distance is not apptoximately the same as that given in (b), make the following adjustment: Loosen screws holding crook st

30、op to tone arm and alter the position of the crook stop until the correct distance of the point of the needle below the turntable Is obtained. d. Tighten screws. NOTE: -Carelessness in mounting the sound box or the pick-up on the tone arm, and failure to fit screw on pick-up in hole provided for thi

31、s purpose, will often result in a condition noted at the beginning of this section. 10. Should the mechanism trip when the index lever is in Victrola or Electrola position, and it has been definitely found that the cause does not lie in any of the points mentioned in subject 8: a. Remove the back pa

32、nel of instrument and loosen taper tube adjusting screw (Fig. I) one quarter (Yi) turn. b. Force the taper tube arm (the casting containing the adjusting screw) UP until the trip lever clears the ratchet by approximately : of an inch. and retighten adjusting screw. NOTE: -The normal position of the

33、collar should now be approximately it, of an inch below the base of the taper tube, PROVIDING ADJACENT PARTS HAVE NOT BEEN BENT OR TAMPERED WITH. 11. If the sound box or pick-up does not lower at the proper position onto a ten- or twelve -inch record:falls into the record groove without first striki

34、ng smooth outside margin: or does not reach the outside diameter of record before lowering: a. Place twelve -inch record on turntable with index lever in 12 -inch position, start the motor and note the distance at which the needle strikes to right or to left of correct adjustment. (Needle should str

35、ike record at approximately the middle of the outside margin.) b. Turn Index lever to Victrola or Electrola, allow- ing mechanism to complete cycle so that tone arm is free and in playing position. c.Stop motor. d. Move the tone arm towards the center of the record, past the eccentric groove until i

36、t strikes the stop. e. Slightly etch the record label at this point with the needle. f. Remove the back panel of the instrument, allowing access to Taper Tube Adjusting Screw, as shown in Fig. 1. g.Loosen the screw one quarter (3d) turn so that the tone arm can be moved the proper distance in the ca

37、sting either to the right or left of the etched mark on the record until the proper adjustment has been obtained. The adjusting screw should again be tight- ened, BEING VERY CAREFUL THAT THE TAPER TUBE ARM CASTING HAS NEITHER RAISED NOR LOWERED WITH RESPECT TO THE TONE ARM. is. Remove twelve -inch r

38、ecord and replace with ten -inch 收音机爱 好者资料库 RadioFans.CN PAGE AUTOMATIC RECORD CHANGER i.Start the automatic mechanism again and allow it to run until the taper tube return lever starts to draw the taper tube towards the record.Shut off power and revolve turntable by hand(if induction disc motor is

39、used) noting the manner in which the needle comes to rest on the record.(If it is noted that the horizontal travel of the needle changes to a slope just before reaching the record and continues so, until surface of the record is reached, It is evident that the mechanism is lowering the sound box or

40、pick-up prior to the termination of the needles horizontal travel towards the record.) As a condition of this nature will sometimes cause the needle to drop outside of the record edge and damage the adjacent mechanisms, or, due to the greater velocity attained on the slope, break down the walls of t

41、he first grooves, the following adjustments should be made: j.Slightly loosen lock nut (13A, Fig. 1) on cam button and with screw driver turn button about ten degrees in either a clockwise or counter -clockwise direction. k. Tighten nut and start the mechanism through Its cycle, again noting the man

42、ner in which the needle strikes the record. Observations should show a needle path practically horizontal until the needle Is almost directly over the margin of the record: then a gradual drop to the records surface.In the event that this adjustment has not yet been reached, turn the cam button abou

43、t ten degrees more in the same direction and repeat until the mechanism functions in the desired manner. In order that this gradual adjustment is not carried too far and to prevent the cam button from resting too much on the slope of the main slide, a check may he made from the following requirement

44、s: ith the index lever in Victrola or Electrola position, and the needle resting on the margin of a ten -inch record, the clearance between the bottom of the fulcrum pin on the taper tube assembly and the fish tail on No. 13, Fig.1. should he about h of an inch, providing the fish tail has not been

45、bent. From the above description it should now be evident that the main function of the cam button is to deter- mine the time or position with respect to the hori- zontal travel of the sound box or pick-up, in which the needle is lowered onto the record, and its adjust- ment should not therefore be

46、altered for other fail- ures. 12. Should the pick-up shunt switch (shown dotted in Fig. 9) fail to close or should it momen- tarily open after the reject button has been operated, or fail to open when the first music grooves are reached: With roller G engaged in pawl carrier at point II, Fig. 9, loo

47、sen screws holding pick-up shunt switch to the operating unit base, and adjust its position so that the contacts have a clearance of aboutof an inch. If the condition cannot be corrected by the above adjustment, loosen the nut shown at 13A, Fig. 1, and turn the screw slightly as may be required. 13.

48、 Should the mechanism fail to trip in ten- or twelve -inch position: a. Loosen set screw under crook joint collar of tone arm and tighten collar untilallside play is removed, being careful, however, that the up and down move- ment of the crook is not impeded. b. Remove any possible bind from trip pa

49、wl on fulcrum pin mentioned in (k), No. 11, above. 14. If the index lever does not point to the proper position on indicator plate, adjustment can be made in the following manner: a. Remove hack of cabinet to give access to gears con- trolling Index lever.The shaft and pinion are on a block which is attached to the top plate with two screws. b With a short screw driver loosen these screws until gears are clear. c. Set Index lever so that It points to proper position on indicator plate. d. Re -tighten the screws and then replace the back of the cabinet. Figures 5, 6 a