Admiral-RC400 电路原理图.pdf

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1、收音机爱 好者资料库 RadioFans.CN SPEED l CHANCE r KNOB (19) 3*jL RC400 RECORD CHANGER The exploded view of this changer is shown on page 16, and the parts are listed and described below. Adjustment and repair instructions are given below and continued to 45RPM RECORO SUPPORT (B) MANUAL OF I9S0 MOST-OFTEN-NEE

2、DED RADIO DIAGRAMS OPERATING INSTRUCTIONS SELECTING CENTERPOST To play 45 RPM records, insert the large diameter (plastic) centerpost (2) into the hole in the center of the turntable (38). While holding the turntable with one hand, turn the centerpost counter-clockwise until the lock-in-lugs fall in

3、to and lock in the three slots in the turntable. To remove this centerpost, hold the turntable with one hand and turn the centerpost clock wise; then lift it up. 45 RPM CENTERPOST (2) Figure 1. RC400 Record Changer (Top View). To play 33 RPM records, insert the small diameter (metal) centerpost (1)

4、into the center of the turntable and press it down until it “locks” in place. To remove this centerpost, merely lift it straight up and out. SETTING SPEED CHANGE KNOB To play 45 RPM records, set the Speed Change Knob (19) so that its indicating arrow points to “45”. RC400 PARTS LIST Ref. Part No. Nu

5、mber Description 1 G400B 409 33 RPM Centerpost 2 G400B 410 f45 RPM Centerpost Complete 3 403A 1 45 RPM Centerpost Cop 4 414A 35 Slicer Return Spring 5 401A 276 Top Slicer 6 401A 275 Bottom Slicer 7 405A 125 Record Supports Return Spring 8 403A 40 Record Supports 9 G400A 411 Slicer Cam and Shoft 10 4

6、03B 43 45 RPM Centerpost Base 11 405A 124 45 RPM Push-Off Return Spring 12 60-1000-C2-47 Screw, #6-32x1 R.H.M.S. 2 req.) 13 401A 229 Retaining Ring 14 402A 312 Lock Nut 15 402A 313 45 RPM Push-Off Adjusting Shaft 16 G400A 417 33 RPM Push-Off Plote and Shaft 17 401A 311 33 RPM Record Support 18 G400A

7、 418 Record Support Housing and Sleeve 19 403A 42 Speed Change Knob 20 403B 300 Pickup Arm 21 G400A 433 Pickup Arm Counterweight 22 402A 320 Pickup Arm Pivot Screw 23 1A73-10 Screw, #6x3/8 Shakeproof Type 2 req.) 24 42-187-C2-47 Lock Screw, #4-40 x3/16 F.H.M.S 25 G400A 439 Cable and Pin Jock Assembl

8、y 26 2810-5-59 Speed Nut 409A 300 Cartridge with needle See Figure 10) 27 or 409A 301 Cortridge with needle (See Figure 11) 98 A 15-6 Needle (See Figure 10) 28 or 98A 15-14 Needle (See Figure 11) 29 98A 54-2 Needle Nut (Knurled) 30 4B 1-7-47 Flot Washer, .096x3/16x1/32 (2 req.) 31 402A 335 Screw, #2

9、x1/4 Fil. Hd. (2 req.) 32 G400A 401 Pickup Arm Lift Rod and Plate 33 G400A 432 Pivot Bracket and Collar (includes Allen screw) 34 1A 43-9 Allen Hd. Set Screw, #6-32x1/4 35 405A 303 Drive Wheel Spring 36 G400A 407 Drive Wheel Assembly (less spring) 37 414A 300 Turntable Retaining Clip 38 G400A 403 Tu

10、rntable and Hub Assembly 39 412A 300 Cork Wosher (2 req.) 40 415A 300 Thrust Bearing Assembly 41 G400C 438 Changer Pan and Stud Assembly tThis 45 RPM centerpost (G400B410) is very similar to, but is not inter changeable with, the 45 RPM centerpost (G400B329) used in models RC221, RC222. The centerpo

11、its can be reodily identified by noting Ref. No. Part Number Description 42 403A 302 Reject Knob 43 G400A 414 Reject Lever and Studs 44 405A 127 Reject Lever Return Spring 45 98A 54-5 Idler Wheel Retaining Spring 46 f98A 54-6 98A 54-11 Fibre Wosher, 3/16 ID x 9/32 OD (4 req.) Metal Washer, 3/16 ID x

12、 9/32 OD (Quontity 47 l 98A 54-7 varies; reploce as found in changer.) Compound Idler Wheel 48 98A 54-8 Fibre Washer (5/32 ID x 3/8 OD) 49 98A 54-9 Metal Wosher (5/32 ID x 5/16 OD) 50 98A 54-10 Idler Wheel Spring 51 407C 300 Motor; 33 ond 45 RPM; 60 cycle 52 3A 4-5-47 #6 Split Lock Washer 53 2 A 1-1

13、1-47 Hex. Nut, #6-32 54 88A 8-1 Motor Plug (mole) 55 406A 301 Motor Mounting Grommet (3 req.) 56 4B 1-68-47 Flat Washer, .196x3/8x1/32 (5 req.) 57 401A 317 Retaining Ring (3 req.) 58 405A 308 Changer Mtg. Spring (3 req.) 59 402A 334 Chonger Mtg. Screw (3 req.) 60 402A 115 Plastiscrew, #6x3/8 61 401A

14、 307 Trip Bracket 62 401A 173 Flat Wosher 63 401A 177 Retaining Ring (7 req.) 64 405A 302 Set-Down Spring 65 401A 315 Index Bracket 66 4B 1-87-47 Flat Washer, .25x3/8x1 /32 67 401A 229 Retaining Ring 68 405A 307 Lift Adjusting Lock Spring 69 402A 306 Pick Up Arm Lift Adjusting Nut 70 88A 2-3 Plug, M

15、ale (for shielded cable) 71 413A 11-1 Shielded Coble and Plug 72 G400A 427 Pickup Arm Lever and Trip Bracket (less springs) 73 405A 127 Trip Tension Spring 74 405A 305 Trip Adjusting Lock Spring 75 402A 328 Trip Adjusting Screw 76 405A 92 Cycle Spring 77 4B 1-178-0 Flat Washer, .196x3/8x1 /64 78 G40

16、0B 416 Drive Brocket (includes hub and studs) 79 4B 1-67-47 Flat Wosher, .196x5/16x1/32 80 G400A 420 Push-Off Bracket Assembly 81 65-375-C2-47 Push-Off Adjustment Lock 41A 17-40 S275 1A45-2 Operating Instructions for Models 5W11, 5W12 Service Manual for RC400 Record Changer Allen Wrench, #6 that the

17、 length of the un-threaded portion of the push-off adjusting shaft (15) is approximately 5/16 in G400B410, ond 3/4 in G400B329. 17 收音机爱 好者资料库 RadioFans.CN MANUAL OF I9S0 MOST-OFTEN-NEEDED RADIO DIAGRAMS Admiral RC400 Changer, continued To play 33 RPM records, set this knob so its indicating arrow po

18、ints to “33”. When moving this knob to either position, make sure that the knob “clicks” into position. This control also has a center (“neutral”) position for disengaging the rubber-tired idler wheel (47). The changer pan is not marked “neutral” but the position can be felt when the Speed Change Kn

19、ob is halfway between “33” and “45”. In this position, the compound idler wheel is not in contact with the drive shaft or the turntable. When the record changer is not going to be used for some time, set the speed change knob in the center position. LOADING AND STARTING THE RECORD CHANGER To load 45

20、 RPM records, place as many as ten over the 45 RPM centerpost so that the bottom record rests on the record supports (8). To load 33 RPM records, place as many as ten over the 33 RPM centerpost so that the bottom record rests on the ledge on the center- post (1) and the 33 RPM record support (17). S

21、tart the changer by turning the Radio-Phono switch on the radio to the “Phono-On” position. STOPPING AND UNLOADING Turn changer off by turning Radio-Phono switch on the radio to “Phono-Off” position. Do not turn changer off during change cycle. To unload, merely lift records straight up. THE CHANGE

22、CYCLE 45 RPM OPERATION (See Figures 2, 3 and 4) If at all possible, we recommend that you carefully observe the operation of a changer that is in normal operating condition. It is a good idea to rotate the turntable by hand and repeat the change cycle until you understand the function of each part.

23、The changer operates as follows: The turntable (38) is driven by the smaller of the two rubber tires on the compound idler wheel (47), riding against the outer rim of the turntable. The speed of the turntable is determined by the setting of the speed change knob (19). When the knob is in the “45” po

24、sition, the larger rubber tire on the compound idler wheel (47) rides against the 45 RPM section (larger diameter) of the motor drive shaft. When the knob is moved to “33”, the compound idler Figure 2. Compound Idler Wheel ond Motor Drive Shaft. 18 wheel moves so that the larger tire rides against t

25、he 33 RPM section (smaller diameter) of the motor drive shaft. See Figure 2. The changer mechanism is driven through change cycle by the knurled hub of the turntable rotating the rubber tired drive wheel (36). During normal playing, the drive wheel does not touch the knurled hub of the turntable. Se

26、e Figure 3A. As the needle enters the record spiral grooves and moves towards the centerpost, the pickup arm lever and stud (72) moves simul taneously and rotates the trip bracket (61) counter clockwise. Since the trip bracket and drive wheel are on the same shaft, the drive wheel is pivoted approxi

27、 mately 10 degrees counter-clockwise. The rubber tire contacts the knurled hub of the turntable, and is ro tated in a counter-clockwise direction. See Figure 3B. Figure 3A Figure 3B Drive Wheel Positions. The drive wheel shaft is fitted through the drive bracket (78) and is mounted OFF CENTER on the

28、 drive wheel (36). Due to the cam action of the “off- center” drive wheel (36), rotation of the drive wheel, by the knurled hub of the turntable, forces the drive shaft out. Since the drive shaft is fitted through the drive bracket (78), the drive bracket is pivoted around the drive bracket hub. The

29、 cycle spring (76) main tains pressure on the drive bracket so that the drive wheel tire is kept in contact with the knurled hub. Aftef the changer has been tripped and the drive bracket begins to be pivoted by the movement of the drive wheel, the arm lift incline (78A) on the drive bracket moves ac

30、ross the lift rod moving it upward. This lifts the pickup arm off of the record. Stud (78C) on the drive bracket now contacts the pickup arm lever and begins to move it so the pickup arm moves out from the center of the record. At about this time, the push-off adjusting shaft (15) on the 45 RPM cent

31、erpost (2) starts moving up the push-off incline (78B) on the drive bracket (78). See figure 12. This causes the push-off shaft to move up into the centerpost. As the push-off shaft moves into the centerpost. As the push-off shaft moves into the centerpost, the slicers (5 and 6) ride on the incline

32、of the slicer cam and consequently move out of the center- post. The record supports (8) are also brought into the centerpost as each slicer is hooked to the record sup port on the opposite side of the centerpost. As the drive bracket continues to pivot, the pickup arm continues to move away from th

33、e record, the slicers (5 and 6) continue to come out, and the record sup ports continue to pull in. When the pickup arm has moved to the right almost as far as it will go, the record supports (8) have pulled into the centerpost enough to drop the bottom record to the turntable and the slicers are ou

34、t far enough to hold up the remainder of the stack of records. 收音机爱 好者资料库 RadioFans.CN MANUAL OF I9S0 MOST-OFTEN-NEEDED RADIO DIAGRAMS Admiral RC400 Changer, continued The pickup arm lever control stud (72A) riding The drive wheel is no longer in contact with the against the indexing edge of the ind

35、ex bracket (65) knurled hub but it is rotated approximately 20 degrees controls the movement of the pickup arm. The index further by the drive wheel bracket, which is held against bracket (65) and set down spring (64) prevent the the knurled hub of the turntable by the drive wheel pickup arm from mo

36、ving out too far. (Later in the bracket spring (35). change cycle the index bracket (65) and set-down spring (64) control the set-down point.) T1 . , , , , , . . . , , When the drive wheel bracket has rotated past the At this point, the drive wheel (36) has gone through knurled hub, the drive wheel

37、must be rotated ahother one-half of its rotation and as the drive wheel continues 10 degrees by the trip bracket (61), or reject lever (43), to rotate, the drive bracket (78) will begin to return before it will contact the knurled hub and begin the to its normal (out of change cycle) position. chang

38、e cycle. When the reject knob (42) is moved to The set-down spring (64) keeps the pickup arm lever the “Rej” position, the reject lever roller rotates the (72) in contact with the arm control stud (78C) on drive wheel the necessary 10 degrees and the change the drive bracket. Therefore as the drive

39、bracket moves cycle begins, back toward its normal position, the pickup arm is moved in toward the set-down point. When the pick- 33 rpm OPERATION up arm lever stud (72A) has reached the indexing point (notch) in the index bracket, the pickup arm has The change cycle for 33 RPM operation is exactly

40、reached the set-down point and stops moving in toward the same as for 45 RPM operation, except for change the centerpost. At this time, the drive bracket has cycle time and the fact that 33 RPM records are sup- pivoted to a point where the lift rod (32) starts mov- ported by the offset on the 33 RPM

41、 centerpost and the ing down the arm lift incline (78A) in the drive bracket 33 RPM record support (17), and are pushed off by the and the pickup arm starts moving down toward the push-off plate (16). record. When the arm has moved down about half- way, the second stud on the drive bracket (78D) mov

42、es When the drive bracket (78) has pivoted to the the index bracket (65) away from the stud on the pick- point where the pickup arm is clear of the record, the up arm lever so that the pickup arm is free to travel stud (80A) on the push-off bracket (80) is moved in on the lead in grooves on the reco

43、rd. by the slot (78E) in the drive bracket. This movement causes the push-off plate (16) to pivot and push-off Almost simultaneously, the push-off adjusting shaft 01rec?r e (ander of the records are (15) is riding down the push-off incline (78B) on the held back by the small sliding piece at the top

44、 of the drive bracket. This allows the push-off return spring centerpost. When the drive bracket pivots back to its (11) on the centerpost to pull the cam and shaft as- normal p aying position, the push-off bracket stud semblv (9) down (80A) follows the slot in the drive bracket and causes the push-

45、off plate to pivot back to its normal position. Then the record stack drops to the record support (17) The record supports are forced out of the centerpost from the push-off plate (16). by their return spring (7) and the slicers are moved into the centerpost by the slicer return springs (4). When th

46、e slicers are all the way in, the stack drops to the record supports (8). MANUAL OF I9S0 MOST-OFTEN-NEEDED RADIO DIAGRAMS Admiral RC400 Changer, continued ADJUSTMENTS TRIP ADJUSTMENT This record changer employs the position type trip; that is, it trips into change cycle when the needle in the pickup

47、 arm reaches a given distance from the center of the record. If the trip is properly adjusted, the record changer will trip into change cycle when the needle is between 2 to 2-3/16 from the center of the hole in the turntable or approximately half way in on the spiral groove in the center of the rec

48、ord. If the record changer does not trip at the proper position, it will be necessary to adjust the trip adjust ing screw (75). See figure 4. Turning this screw in (clockwise) moves the trip point away from the center- post. Turning it out, moves the trip point nearer to the centerpost. When properl

49、y adjusted for correct set-down, the needle point will set-down between 2-9/16 and 2-10/16 from the near side of the 45 RPM center- post. (Between 3-5/16 and 3-6/16 from center of the hole in the turntable.) Making this adjustment for 45 RPM records, automatically provides correct set- down for 33 RPM records. If the pickup arm does not set-down properly, the set-down point adjustment should be made as follows: 1. Insert the 45 RPM centerpost (2); set the speed change knob (19) to the “45” position; move the reject knob (42)