RCA-Victor-Co-Inc-RAE-79 电路原理图.pdf

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1、PAGE 7 7 -A RE -20, R-50, R-55, RAE -59 311:=1 21IS144!2 ITT4V j 1111111111111 111111I I I, 6 .091 .441 MICRON 0111i4, 1 25 5,0004+ 6-24 7,500 6.27 600a 1.-11 R-30 7 MAGNETIC PICKUP PHONOGRAPH MOTOR .J Schematic Wiring Diagram R E- 20 180004 2,1 OCT. 22 01.11:510. 2400 114E6. ntd.T.S: LIMO It will b

2、e noted on the early Models of R-50 and R-55 that a small 9 mmfd. capacitor is inserted in series with the oscillator trimming capacitor.This capacitor is not used on later models that have a slightly different dial scale. When replacing a dial scale it may therefore be necessary to short this capac

3、itor.A failure in the capacitor may be remedied either by replacing the capacitor or the dial scale. I2 1 4 5 67 6 9 10 11 11 31415 16 a IN 1122021 MICROPHONE Ilill :1111; 1 i IINPUT!li AND PTRANSFORMERICKUP RECORDINGIRI I I.1319IIli NOME1_1_ 4 04. RECORD RADIO RECORDING RADIO R-26 7547- I , , ,. lo

4、ops ,PAM) R22 GREEN R25 MACK 010 LACK. GOA OCS MOOD VOLUME CONTROL AND MOTOR SWITCH Schematic Wiring Diagram of Model RAE -59 收音机爱 好者资料库 RadioFans.CN .13:Au:, irj1 RED ;.,L1. ram ammom S. PNo.I 71 No.2 T-1 -BLACK-AND-RED RED TRACER YELLOW- YELLOW- BROWN_ ROWNAND-BLACK- BROWN - ts GREEN GREEN -.-. BL

5、OC BLUEANDIEILOW- BLUE POWER TRANSFORMER CONNECTIONS C-31Ise C-33 le C-36 :1C-35 2.MFac.14FD. +0.5 46NtD:1-2 46.M71/ 4FD- I,C1-3314 TMFD. 25,v rZ25. *IIMFD. CAPACITOR PACK CONNECTIONS 41 IntInCMMI6InIS kV(./.1i,(if war, 004774 1711722 0-10(OVIVOt Salaram110-11110,0 53% 0.10 X. In IP,1.41213 .1.11201

6、11, 5 -4 4111# O U.% . oftea CIS I1 f11.1111 11 05.1f0 141(3001.005 . ;. II 00* *44 i=10 11=11 0.151:0 1.0.010 *MN PIANO Schematicdiagram of Model RAE -79 i a 1 a 1 . 1 ., . 5 17-32 17-28 77-27 724 17-19 20.19 1. .f. 0.5., 0.1Z.10.1 iFM D.-.MFD LIMED. Z.MFD. 1SMFD. VTI INTERNAL CONNECTIONSOF1 BY-PAS

7、S CAPACITOR PACK 4 1 E 2 81 IR a ce -1 t M r D. atiFD. 1. -17-20 -t- T 7-5,3 = . tIMFD. .c arD. _. INTERNAL CONNECTIONS OF BY-PASS CAPACITOR PACK T-2 1,22 VOLUME .Goff TIC PICKUP tO 255 ro*06411krol to07011 ,1.251110 50-60. 3.75 MID. 25 -30 - BLUE YELLOWJ VBLUE INTERSTAGE TRANSFORMER CONNECTW RED I-

8、3 BLACK -RED -AND -BLACK REDLACK OUTPUT TRANSFORMER CONNECTIONS TO*I 01.1.111.11.14 RIM -1.00 4. r4t4 1,11) sM -9.1fkivkiki -0.os OP 54,0,4; n. 141011.0. MICDPD -4 POSM 421V4Vrt., 4 .116 Rums-J . 10111011.1 GOA Pt MO L 135 C-30 C-26R-7 B-15 R-9R-6011 .01745 20004,110,000A 10,00011 0.5 745 MED. MMFE1

9、t , MEG I-MMFD -R-1312-12 R-8 R-4 L-16 30,000A 10000A 14000A 170rt 150011 RESISTOR BOARD CONNECTIONS L-18 YELLOw_ BLACK GREEN REACTOR CONNECTIONS 收音机爱 好者资料库 RadioFans.CN PAGE 80-A RE -20, R-50, R-55, RAE -59 FOLLOWING FOR. MAX. OrTrT 1 gridI -F Grid in series witn .01 mfd 175 ke .11.e-. Point near 6

10、00 k_, S.Q.P.:;: 3rd T -F Trans. 2 1stI -F Grid in series with .01 mfd 5,cP of Fed I -F Trans. 3 1st Det.Grid In series with .01 mfd F,P,P of 1st I -F Trans. 4Antenna in series wit 200inhmfd 1400 kc1400 kc 4 Trimmers on .Jang Cond. 5 600 kc600 kc POO Ice Trimmer Rock Gang 6Repeat StepLi The remote c

11、ontrol feature consists of a standard R-50 chassis with a special gang condenser; a capacitor motor coupled to the gang condenser through a series of gears; a series of drums and contactors by which the motor is started in the right direction for a given station and stopped at the right point; a spe

12、cial volume control geared to the motor; a relay to turn the set on or off and a remote control box by which these operations are controlled. The motor is provided with a tapped reactor and condenser for changing the phase angle of the applied current so that operation in either direction may be sec

13、ured.The motor operates at 23 volts for the station selector and 18 volts for the volume control. All power transformers when replaced must have the primaries so connected that the pilot light on the remote control box lights properly.If the transformers are improperly phased, the lamp will brighten

14、 instead of dim when a selector button is pressed. pAir4i; ai-A RE -20, R-50, R-55, RAE-59 E 83-A MAGNETIC PICKUP RECORD VOLUME CONTROL RE -20, R-50, R-55, RAE -59 continuous playing ofone side of ten 10 -inch records, operation at either 33% or 78 R.P.M. for playing standardor Program Transcription

15、 records manually or automatically, a special clutch to prevent jamming incase of failure of a part and a heavy duty motor operating at synchronous speed thereby eliminatingany need for regulating devices. The automatic mechanism used in the RAE -6b is similar to that used in RAE -26, RAE -59 and RA

16、E -79. However it is 76 r.p.m. only. The automatic mechanism used in the RAE -84 is similarto that used in other RCA Victor auto- matic combinations such as Models RAE -26, 59,or 79. Several minor changes have been made in these machines as follows: 1. Concentric Groove Trip. A trip so that either B

17、runswickor Columbia records may be mixed with Victor records in the automatic magazine has been provided. 2. An automatic starting switch, operated by pulling thetone arm to the right, has been added for manual playing. 3. A trip to stop the motor when playing either 10- or 12 -inch records manually

18、 has been added. 4. An interlock has been provided so that the manual lever cannot be moved while the mech- anism is in cycle. This prevents jamming due to improper operation. 5. A ball race speed reducer is used for changing the turntable speed from 78 to 33Y3 R. P. M. This is simple in operation a

19、nd gives a greater freedom from wows than the gear type reducers. 6. Needle Lamp. A small electric lamp is provided so that proper illumination of the record and pickup is obtained. This assists in properly inserting the needle into the pickup as well as lower- ing the needle onto the record. Servic

20、e in conjunction with this mechanism will therefore be practically thesame as that of the older type automatic record changing mechanims. However, dueto the new trips several additional adjustments are now included. (1) ADJUSTMENT OF AUTOMATIC SWITCH The automatic switch should be adjusted so that t

21、he contacts are at least 0.025 inches apart when the switch mechanism has been tripped. This is important, as otherwise arcing at the switch may occur. (2) ADJUSTMENT OF 10 -INCH AUTOMATIC SPIRAL GROOVE TRIP LEVER The 10 -inch automatic spiral groove trip lever should be adjusted bymeans of the scre

22、w assembled thereon. Proper adjustment is obtained when it forces the four finger lever out of contact with the clutch pawl, which trips the mechanism, when the needle is betweena 1% inch and a Ui inch radius from the center of the turntable spindle. (3) ADJUSTMENT OF 12 -INCH AUTOMATIC SPIRAL GROOV

23、E SWITCH The 12 -inch automatic spiral groove switch should be adjusted bymeans of the adjusting screw assembled in the trip lever so that it forces the switch lever out of contact with the switch trip lever, causing the latter to open the switch when the needle is between a 1 inch and a Ui inch rad

24、ius from the center of the turntable spindle. RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A. PAGE 251-A AUTOMATIC RECORD CHANGER Remember That the Control Lever Can Be Changed from Automatic to Manual Only When the Mechanism is Not Changing Records Place a Home Recording

25、 needle into the pickup as far as it will go. Then lower the pickup on the side of the turntable. The needle shouldextend from to I.6 below the top of the metal edge of the turntable. If it does not, an adjustment can be made by means of a screw located under the tone arm. Lifting the arm provides a

26、ccessibility to the screw. See Figure 2. If when starting the automatic mechanism, the needle lowers onto the smooth outer rim of the record but fails to swing into the first groove, it may be caused by the following: (a) Cabinet not level. (b) Weak tension in spring. A flat spring presses against t

27、he tone arm lever on the under side of the motor board. See Figure 17 Bending it so as to increase its tension against the tone arm lever will cause the needle to swing into the first record groove. Be careful not to bend it too much as excessive tension will cause the needle to skip several grooves

28、. After the instrument has :ompleted one record changing operation, a ten inch record should extend about three-quarters way over each elevator pad. If this condition does not exist, an adjustment can be made by means of the screwsthat hold the pads in position. A pair of pliers heavily padded with

29、cloth or other soft material should be used to hold the elevator shafts while loosening and tightening the screws. The distance from the closest part of either pad to the edge of the spindle is approximately 434. Figure 3 shows the method of making this adjustment. Figure 2-Adjusting height of lone

30、armFigure 3-Adjusting elevator pad umarnife mnoommel.=lw 11111111 PAL Figure -Adjustment of damper pads (1) SPEED VARIATIONS (WOW) A variation in the speed of the turntable evidenced by distortion on long sustained notes when playing Program Transcription records may be caused by any of the followin

31、g: (a) Improper operation.It is very important when changing the speed shift lever from 78 R.P.M. operation to 33N R.P.M. operation, to place the hand on the turntable and hold it until it is positively engaged by the driving mechanism. (b) Lack of proper lubrication.It is important that excessive g

32、rease on the gear reducing mechanism be avoided and that sufficient oil is present between the ratchet and the surface upon which it rests. Also clean and oil the spindle bearing and wipe off any excesslubricant that may be on the damper pads or the drive gear upon which it rests. Improper Adjustmen

33、t of the Damper Pads. The damping pads with the necessary springs are provided to place a load on the 33N R.P.M. driving gear atall times while it is in operation. Placing such a load on the gear takes up any possible play and reduces the possibility of a wow during operation at the slower speed. Ad

34、just these pads by slipping each spring to one side and bend them until they are life beyond the opposite surface upon which they rest.(See Figure 4). (d) Washers Not in Place. A metal washer is placed directly under the speed reducing mech- anism and a leather washer directly over it, both washers

35、being over the spindle.These washers must be in their proper position.Also if the leather washer has become hard it must be replaced. In some cases, removing the speed reducing mechanism and turning it approximately 90 and then replacing it, may eliminate a wow caused by improper meshing of the gear

36、s. (c) (e) PAGE 2 5 2-A AUTOMATIC RECORD CHANGER (2) ADJUSTMENT OF MAGAZINE ROLLER The magazine roller should be set in sucha position that the plane of the roller is 90 to a line drawn from the center of the magazine bearingto the center of the roller. The height should be adjusted so that it will

37、just touch the magazine when it isempty. (3) FAILURE OF NEEDLE TO LOWERPROPERLY Failure of the needle to lower onto the smoothouter rim of the 10 -inch records when the instru- ment is playing automatically may be caused by: (a) Improper Tone Arm Setting. Loosen the set screws as shown in Figure 5.

38、With the mechanism out of its cycle, press the locating leverat a point near the flat spring until the lever strikes the stopscrew. Holding the locating lever, Figure 17, in this position, move the front portion of the trip lever, Figure 15, until the pin against which the flat spring presses, is ma

39、king contact with the locating lever. Holding the two levers in this position, move the pickup arm until the needle is if6 from the firstgroove of a standard 10 -inch record. Now retighten the two set screws shown in Figure 5. (b) Figure 5-Adjusting position of tone arm Figure 6-Adjusting tone arm l

40、ocating screw Improper adjustment of tone arm locating screw. This adjustment, shown in Figure 6, can be used to make a substitute adjustment for that described in (a), when the mechanism is out of the cabinet. Make the adjustment so that the needle will lower exactly 1/f6 from the first groove on a

41、 standard 10 -inch record. Loosen the lock nut on the adjusting screw by means of a No. 4 Spintite wrench on which the shoulder has been ground sufficiently thin for clearance. Do not attempt to make this adjustment without first loosening the locknut. Tighten the lock nut when the proper adjustment

42、 has been made. (4) FAILURE OF NEEDLE TO LOWER ONTO RECORD SURFACE Failure of the needle to lower onto the record surfacemay be caused by: (a) Cable out of pulley. Examine the tone arm cable and ascertain that it is seated in the pulley. (b) Shielded pickup wire improperly placed. Examine the shield

43、ed lead coming out of the tone arm base and make sure that it is free from the moving parts of the mechanism. (c)Incorrect setting of tone arm lowering screw. Check the position of the tone arm as described in Paragraph 5, (d) Turntable washer not in place. A leather washer is suppliedto fit under t

44、he turntable. If this part is not in place, the turntable will be too low, andmay cause the needle not to lower onto the record. (e)Incorrect adjustment of cable tension screw. The cable tension screw shown in Figure 7 should be so adjusted that the needle will lower smoothly onto the record without

45、 dropping. When this adjustment is obtained, the cable will be slightly loose when the needle is lowered onto a record. Loosen the lock nuts, turn thescrew to the right or left as required and retighten the lock nut. Check the adjustment to make sure that the needle clears the record on the return o

46、f the tone arm. The needle should rise ;f6 from the record before any horizontal motion takes place. (5) NEEDLE FAILS TO CLEAR RECORD AFTER PLAYING Failure of the needle to clear the record surface on the return of the tonearm is caused by too loose adjustment of the cable tension. Adjust this tensi

47、onas described in Section 4, Paragraph (e). PAGE 253-A AUTOMATIC RECORD CHANGER (6) FAILURE OF RECORD TO DEPOSIT ON TURNTABLE Incorrect lowering of the record onto the turntable may be caused by (a) Improper turntable spindle height.The height of the turntable spindle nose should be approximately 1,

48、1 above the inside bottom surface of the record magazine. Adjustment of this height made by means of the screw at the bottom of the motor.(See Figure 8). Figure 7-Adjusting lone arm cable tension screwFigure 8-Adjusting spindle height (b) Improper setting of magazine. The horizontal swing of the mag

49、azine should be so adjusted when the mechanism is out of cycle that the outer surface at its nearest point to the nearest side of the turntable spindle is 5142.This can be done by loosening the two screws as shown in Figure 9, moving the magazine to its correct position and retightening the screws. (c) Improper height of record transfer lever.The small plate on top of the motor board at the left side of the turntable should be so adjusted that it will depress approximately when the magazine swings over the turntable.When this adjustment