RCA-Victor-Co-Inc-10-70 电路原理图.pdf

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1、PAGE 48-A MODEL 10-70 I111211.re L_ ttr-,71. 1, Amoy,. 1. 33,am /1-01,. .); 9 PICILIP SNORTING SWITCI MCA *ITN 1111011 TRACK IN OWN GRUM Crar 4P- ,Pr OR RP -152-e. Wiring Diagram-Electrola 10-70 OUTSIDE cold ILIICT COI 1113 111E4 111111 111111 Mal VON BROWN TOKEN 1(1101 11111 ON MUNI TONIRO1 1073 ST

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3、ewe -N cam. 4. 5 .114pw,r4RszTrenct-4 BOOK.Worm Fitton/ TTRI,If MKroen 9 R.11Rio 44.ncK War, Bee.,ncrn 13!.wn 1,4-ro Wwo reTR AC MA LICA 11111 1110111 INATEI RID 110 MAROON NCI WON NAM INICEI1 1113 Will EWAN TRACER ILICA MIN RIO 111011 kW INPUT MCA till BROWN 111011 113 Wiring Diagram fcr Automatic

4、Electrola No. 10-70 414I tall(. C.vwA I Como Ptc,c/f3avoor. .51.rc,4 t. HuEmor Can.*. avroneih drwirr Q;maws.YP 4 A Wiring Diagram No. 10-70 above serial No. 2600 Thrreerr. arr. I 1.11179,9m.- areas, 4R199-esnoPlacerwor) Raz. haw, th9e9. RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N.

5、 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 lower onto the smooth outside rim of the revord. a.loosen the 12 eccen- tric

6、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-; the stop to the right, and in other cases to the left. c. Check thesetting a

7、fter 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 Lift Lever Stud 5.Slide Spring(Not Shown) 6.Main Slide 7.Intermediate Gear 8. Ca

8、m 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. 32. 33. 34. 22 17 13* 14 16 15 4 Taper Tube Return Lever Connecting Link Spr

9、ing 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 operating unit of the Automatic Electrolas differs from the Automatic Victrol

10、as 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 switch and the remote reject control. SERVICING 1. Should the sound box (or pick

11、 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 sound box will not swing over into the record groove. If the left side is low th

12、e 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 upon the smooth portion of the record. 47 45 AUTOMATIC RECORD CHANGER US ED WIT

13、H -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. The magazine spindle (No. 36, Fig. 2) should either be lowered or raised sligh

14、tly 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 permit the records to mount the buttons properly. Remove magazine stand and

15、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 fails to line up with the turntable spindle: a. The magazine spindle is bent

16、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, Fig. 2) occur: a. Remove the shaft (No. 49, Fig. 2.)If bent, it should be repla

17、ced 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 ring to rise simultaneously. The record consequently is not raised from the tu

18、rntable 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 SPRINGPART 16998 Fig.2 Name of Part 35.Screw Nut (Not Shown) M. Magazine Spindle 37.

19、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.Felt 52.Record Lift Ring 53.Felt 54.Screw 55.Switch 56.Roller 5. If the lift rin

20、g 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. S A. 收音机爱 好者资料库 RadioFans.CN PAGE 240-A AUTOMATIC RECORD CHANGER Fig. 3 Nam

21、e 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 (No. 70, Fig. 4) located under brass plate on switch trip may be loose. c. On

22、e 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 801 proceed as follows: Remove the bakelite cap of switch and spread con- tact

23、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 instruments the following procedure should be used: Remove bakelite top, loosen s

24、crews 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 to open to their maximum point and prevent arcing and sticking. File and clean

25、 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. 801 All Other Automatics Bottom Plate Only 72.Spacer 73.Switch (Used with Bott

26、om 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 removing the front panel on which the index lever is mounted and bending the reject

27、 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 pushed may be caused by: a. The button being stuck, having been forcibly pus

28、hed 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. CAUTIONUse nothing but specified springs through- out. 9. If the point of the ne

29、edle 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 mechanism to operate until the tone arm is in playing position and free. b. Note di

30、stance 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 stop to tone arm and alter the position of the crook stop until the correct dis

31、tance 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 this purpose, will often result in a condition noted at the beginning of this se

32、ction. 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 panel of instrument and loosen taper tube adjusting screw (Fig. I) one quarter

33、(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 collar should now be approximately it, of an inch below the base of the taper

34、 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 striking smooth outside margin: or does not reach the outside diameter of record be

35、fore 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 strike record at approximately the middle of the outside margin.) b. Turn Index

36、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 it strikes the stop. e. Slightly etch the record label at this point with the

37、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 casting either to the right or left of the etched mark on the record until the

38、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 record and replace with ten -inch 收音机爱 好者资料库 RadioFans.CN PAGE AUTOMATIC RECOR

39、D 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 used) noting the manner in which the needle comes to rest on the record.(If i

40、t 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 pick-up prior to the termination of the needles horizontal travel towards the

41、 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 the first grooves, the following adjustments should be made: j.Slightly loosen

42、 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 manner in which the needle strikes the record. Observations should show a needle

43、 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 about ten degrees more in the same direction and repeat until the mechanism funct

44、ions 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 requirements: ith the index lever in Victrola or Electrola position, and the needle rest

45、ing 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 bent. From the above description it should now be evident that the main funct

46、ion 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 altered for other fail- ures. 12. Should the pick-up shunt switch (shown dott

47、ed 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, loosen screws holding pick-up shunt switch to the operating unit base, and adjus

48、t 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. Should the mechanism fail to trip in ten- or twelve -inch position: a. Loose

49、n 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 pawl 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