RCA-Victor-Co-Inc-QU51M 电路原理图.pdf

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1、PAGE 5i1-C MODELS QU51C, QU51M and QU55 Chassis No. RC -568 RC -568A Seven -Tube and Magic Eye, Five -Band, Radio -Phonographs 4-44* QU51D1 Electrical and Mechanical Specifications FREQUENCY RANGES Standard Broadcast (A Band) 540-1,720 kc (556-174 m) Medium Wave (B Band) 3.0-9.5 me (100-31.6 m) 31 M

2、eter Spread Band 9.5-11.7 me (31.6-25.6 m) 25 Meter Spread Band 11.7-15.1 me (25.6-19.9 m) 19-13 Meter Spread Band 15.1-22.5 me (19.9-13.3 tn) INTERMEDIATE FREQUENCY 455 k TUBE COMPLEMENT (1) RCA-6SK7 (2) RCA-6SA7 1st (3) RCA-6SK7 I -F Amplifier (4) RCA -6U5 Tuning Indicator (5) RCA-6SQ7 2nd Det. A

3、-F Amplifier AVC (6) RCA-6AD7G Phase Inverter and Power Output (7) RCA-6F6G Power Output (8) RCA-5U4G(in QU51C and M) Rectifier (8) RCA -5T4 (in QU55). Rectifier PILOT LAMPS 2-Type 44, 6.3 volts, 0.25 amps. POWER SUPPLY RATINGS 105-125 volts, 50-60 cycles 115 watts* 105.125 volts, 25.60 cycles . 115

4、 watts* 100-130, 140-160, 200-250 volts, 50-60 cycles 115 watts* * Including phono motor. POWER OUTPUT QU51C Q51 QU55 Undistorted 9.5 watts 12 watts Maximum 11 watts 15 watts 3 TERM ar0 O - 57 RAD -PHONO 5w (SHOWN IN RAD. POSITION ) R (O 4IGH TONE CONTROL 500 M 223 82 M C54 .025I R11 LOW Tee.* CONTR

5、OL 1 MEG. LOUDSYEAKEIS RL7ON1 RL7ON3 RL71A4 Type 12 -in EM 12 -in. EM 12 -in. PM Used in QU51 Q1155 QU51 7z N yg -rl11 mTS86 f iaQ444Q 72255252 1919044111190 mOnOdaNj -N11dN19r L. O d N NA/Ne NW rc No l* 9 I, N V- .elk, 9Qg4Q,e O JA C,. G 48 n /40- -d 000 11 20 f _G N m N J 7,0 11 (1,N UN- a N O u r

6、u ,o- fki-f 11 e. m e 09 4Q / II. m, 00 PAGE 513-C U-5iC, -M, QU55 n N _ O w N g b J ne J11 4pr O d I m 4 d7 UN t watt Resistor -270,000 ohms, * watt Resistor -330,000 ohms, watt Resistor -470,000 ohms, 3 watt Resistor -1 meg., 1/10 watt Resistor -1 meg., watt Resistor -2.2 meg., 3 watt Resistor -10

7、 meg., * watt Screw-No. 8-32 square head set screw for drum Socket -7 contact socket located on rear apron of chassis Socket-Dial lamp socket Socket-Tube socket Socket-Tuning tube socket PAGE 515-C Replacement Parts (Continued) QU-5IC, -M, QU55 STOCK No. DESCRIPTION STOCK No. DESCRIPTION 31418 31261

8、 37993 35636 36815 34183 2917 37053 37994 37993 31373 38307 38308 13867 12079 11469 36145 31539 36146 37997 13867 38331 11469 36145 5119 31539 36146 37997 13867 36145 5118 38146 36461 12537 11315 4870 30716 36109 35629 36328 33680 38155 35387 36074 37839 36386 35392 36156 35391 38225 38303 30698 Spr

9、ing-Drive cord spring Spring-Retaining spring for oscillator coils core and stud assemblies Switch-Range switch Transformer-First I.F. transformer Transformer-Second I.F. transformer Transformer-Power transformer -110-125-150- 210-240 volts, 50-60 cycle Washer-C washer for tuning shaft CHASSIS ASSEM

10、BLIES QU55, RC568A (Same as QU51, RC568 except the following) DELETE Board-Antenna-Ground board Bracket-Pulley bracket assembly (long bracket) Switch-Range switch ADD Pulley-Drive cord pulley (-n. dia.) Pulley-Pulley (3 -in. dia.) and bracket assembly Switch-Range switch SPEAKER ASSEMBLIES (RL7ON1)

11、Cap-Dust cap Coil-Field coil, 1060 ohms Coil-Neutralizing coil Cone-Cone complete with Plug -5 prong male plug Suspension-Metal cone suspension Transformer-Output transformer SPEAKER ASSEMBLIES (RL7ON3) Cap-Dust cap Coil-Field coil, 1630 ohms Coil-Neutralizing coil Cone-Cone complete with voice coil

12、. Plug -3 -contact female plug for speaker cable. Plug -5 prong male plug for speaker Suspension-Metal cone suspension. . Transformer-Output transformer SPEAKER ASSEMBLIES (RL71A4) Cap-Dust cap Cone-Cone complete with voice coil Plug -3 prong male plug Suspension-Metal cone suspension MISCELLANEOUS

13、ASSEMBLIES QU51 Button-Plug button Capacitor -580 mmfd., for QU51C only Capacitor-.015 mfd., for QU51C only Capacitor-.025 mfd. Clip-Tuning tube clip Control-Bass tone control Control-Treble tone control Cover-Compartment leads cover Cup-Used needle cup Decal-Bass tone control decal. . Decal-Power-v

14、olume decal Decal-Radio-Phono switch decal Decal-Range switch decal Decal-Trade mark decal (His Masters Voice) Decal-Trade mark decal (RCA Victrola) Decal-Treble tone control decal Decal-Tuning decal Dial-Glass dial scale Hinge-Cabinet door hinge Hinge-Cabinet lid hinge 36593 13103 35814 35775 11891

15、 33774 31470 37998 36395 31048 38302 36246 30128 30492 14023 37800 33083 30900 35831 38301 14609 38303 30698 37998 38302 33083 35831 38704 38310 38382 38381 38309 36413 30650 35575 36414 36693 Indicator-Station selector indicator Jewel-Pilot lamp jewel Knob-Range switch or radio -phono switch knob K

16、nob-Tuning, volume control, treble or bass control knob Lamp-Dial lamp Mounting-Complete set of mounting hardware to mount one speaker Mounting-Motorboard spring mounting Plate-Dial plate complete-less dial, pointer, and tube clip. Plug -7 -prong male plug for radio -phono cable Plug-Phono ihput cab

17、le plug for QU51M Pull-Door pull and screw Receptacle-Packaged needle holder Resistor -12,000 ohms, watt Resistor -22,000 ohms, watt Resistor -82,000 ohms, watt Shade-Lamp shade Spring-Cabinet lid support spring Spring-Retaining spring for knobs Support-Cabinet lid support Switch-radio-phono switch

18、Transformer-Input transformer for QU51M. MISCELLANEOUS ASSEMBLIES QU55 (Same as QU51 except the following) DELETE Hinge-Cabinet door hinge Hinge-Cabinet lid hinge Plate-Dial plate complete-less pointer and tube clip Pull-Door pull and screw Spring-Cabinet lid support spring. Support-Cabinet lid supp

19、ort ADD Back-Cabinet back Board-Antenna-Ground Hinge-Cabinet lid hinge L.H Hinge-Cabinet lid hinge R.H. Plate-Dial plate complete-less pointer and tube clip Pull-Door pull Resistor -56,000 ohms, watt Spring-Cabinet lid support spring Support-Cabinet lid support L.H. Support-Cabinet lid support R.H.

20、w/k -11ML IORRFVOWMe COhTNOI 1 TaaIN6 CONTROL Gwa an u IMAGE COIITIfOI Q U55 FOR RECORD CHANGER REPLACEMENT PARTS SEE SERVICE NOTES ON RP -145E for MODEL QU-51C RP -152R for MODELS QU-51M and QU-55 lhighasst TREBLE TONE 4 CONTROL speech full (lasst louu) BASS TONE - CONTROL radio phono RADIO -PHONO

21、_ tly CONTROL Q U55 MAGIC EYE Shalt i+NO/N1 CdRROL QU51C and QU51M QU51 e_ TUNING CONTROL 31 B 25 RANGE CONTROL POWER -VOLUME CONTROL seih off, loud PAGE 726-C RP -152, RP -153 RP -155 and Automatic Record Changers RP -157 RP vs. MODEL NUMBERS MODEL NO. RP NO. MODEL NO. RP NO. MODEL NO. RP NO. Q(,l-

22、7 v A-15 Qu-51m8QUe5 QU-52C QU-52M V-170 RP -157 RP RP -52R RP -152S RP -152R RP -152 V- 200 V-201 vu -202 V -2o5 V -205A UR -207 RP -152A RP -152A RP -155 RP -1523 RP -153 RP -155 V-3oo V- 30 1 V -3o2 VHR-3o7 V -4o5 VHR-4o7 RP -152J RP -153 RP -153 RP -155 RP -152J RP -155 RP -I55 AND RP -I57 ARE E

23、QUIPPED FOR HOME RECORDING, OTHERWISE SIMILAR TO RP -I53 RECORDS SPINDLE RECORDPOLDER POST RECORD -HOLDER SHELF TURNTABLE WITH RECORD IN PLACE NEEDLE SCREW 12 INCH NEEDLE HOLE IO INCH MANUAL RECORD -MOLDER SHELF The RP -152 and RP -153 automatic record changers are very similar in design and constru

24、ction. Most of the parts and adjustments are identical on both. The RP -153 turn table is driven through a worm gear in the motor housing while the RP -152 turntables are driven through a friction drive disc mounted under the turntable. On Models RP -152 it is important that the drive motor spindle,

25、 and rubber tires on main driving disc and idler pul- ley be kept clean and free from oil, grease, dirt, or any foreign matter at all times. Any quick -drying naphtha is satis- factory for cleaning these parts. The drive motor bearing is lubricated from an oil well filled and sealed at the factory.

26、It should not require lubrication in the field. The rubber -tired drive disc on Models RP -152 is not re- movable from the spindle. The turntable is fastened to the driving disc by three bolts. If necessary to remove these parts the spindle drive gear set screw should first be removed. The driving d

27、isc, turntable and spindle assembly can now be lifted upward from the motorboard. If this is done, great care should be taken not to bend the spindle. To remove the turntable and spindle on the RP -153 type it is necessary to first remove the tapered pin in the turntable drive arm assembly. The turn

28、table and spindle can then be drawn up through the motorboard bearing. Before servicing the automatic record changer, inspect the assembly to see that all levers, parts, gears, springs, etc., are in good order and are correctly assembled. A bind or jam in the mechanism can usually be relieved by rot

29、ating the turntable in the reverse direction. The changer can be conveniently rotated through its change cycle by pushing the index lever to Reject and revolving the turntable by hand. Six turntable revolutions are required for one change cycle. A pickup shorting switch, located under the motorboard

30、, operates when the pickup is moved outward to the pickup rest. RECORD -HOLDER POST PICKUP -ARM PICKUP INDEX AND RECORD REJECT LEVER EXTENSION POST NEEDLE BOX HOLDER NEEDLE GAUGE PLATE PICKUP SUPPORT PLATE TURNTAELE SWITCH REJ ECT The 10 and 12 -inch records must be absolutely flat for smooth operat

31、ion. When a record has been played the pickup moves out, another record is dropped down, and the needle is fed auto- matically into the starting groove of this record. If the needle fails to enter the starting groove, raise the right-hand side of the cabinet by inserting thin spacers under the feet

32、on that side. If the needle slides over a few grooves, raise the left-hand side of the cabinet in a similar manner. Cycle of Operation In automatic operation (index lever set to 10 or 12), when the pickup needle enters the eccentric or spiral groove at the inside of the record, the pickup arm swings

33、 in the groove, and this motion acts through a friction clutch to trip or start the cycle of the automatic record changer mechanism which: 1. Lifts up the pickup arm and swings it out clear of the records. 2. Turns the two record -holder posts, each of which has a knife and a shelf: The knives enter

34、 between the bottom record and the rest of the stack. Continuing to turn, the shelves move from under the bottom record and it drops on the turntable, while the rest of the stack of records are sup- ported by the knives. 3. The pickup arm is then moved to correct position and lowered on the record,

35、while - 4. The recordholder posts are turning back to their original positions, so that the records rest on the shelves, and the knives are in correct position to separate the next record from the stack. The cycle is completed when the pickup comes down on the record. The pickup arm should not be mo

36、ved while in cycle. RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A. Cautions RP -152, PAGE 727-C RP -153, RP -155, RP -157 1. This instrument is not recommended for playing 10 -inch and 12 -inch records in mixed sequence. 2. Never use force to start or stop the motor or a

37、ny part of the record -changing mechanism or pickup arm. 3. Warped or damaged records may cause the mechanism to jam. 4. Warped records may slide on one another when playing, resulting in unsatisfactory reproduction. 5. Do not leave records on the record -holder posts as they may warp, particularly

38、in warm climates. Warped records may be flattened by placing them on a flat surface with a flat heavy article placed on top of them for a few days. 6. Do not leave pickup needle resting on a record or on the turntable. Always place it on the pickup rest. 7. Do not insert a used needle in the pickup,

39、 and avoid turning a needle after it has been used. 8. If for any reason the phonograph stalls, turn off the turntable switch and remove the records from the record holder shelves. Start the turntable and allow the pickup arm to complete its cycle. RCA VICTROLA MECHANISM DATA RP -152, RP -153, RP -1

40、55: The following changes have been made in these Record Changers: (a) Removal of Trip Regulator Lever (Part 21). (h) Removal of Pin 1 on Trip Lever Friction Finger (Part 7). (c) Repositioning of Stop Pin 2 from position A to position B. (d) Removal of Pin 3. Since this pin does not interfere with t

41、he operation, it has beer left in some mechanisms. 21 PIN j PIN 1 O. PIN2 A oB PIN 4 PICKUP ARM, S Trip Regulator Lever (21) is Removed in Some Production. The Trip Regulator Lever was formerly used to prevent premature tripping due to a too early return of the Trip Lever Friction Finger at the end

42、of each changing cycle. The same result is obtained by removing the Trip Regulator Lever and repositioning the Trip Finger Stop Pin as shown in the diagram. Binding or Hesitation of Tone Arm: This may be due to the following causes: (1) Small burr on edge E. Correction: Carefully remove burr with a

43、fine file until edge is entirely smooth. (2) Binding of Pin 4 between edges E and F. Correction: File off edge F with a fine file to give just enough clearance for smooth operation. (3) Too far an outward swing of the Pickup Arm. This causes Pin 4 to be caught in the upper curved portion of edge F.

44、Correc- tion: On some models the Pick-up Arm Shaft can be rotated by loosening the nut under the motor board. Rotate sufficiently to prevent Pin 4 from riding into curved portion mentioned, when Pick-up Arm is in the outermost position. On models where the Pick-up Arm Shaft is positioned by a locati

45、ng key, it is neces- sary to bend Stop Guide S on Pick-up Arm towards Stop Ear P on Pick-up Arm Shaft so that the condition men- tioned in the above paragraph is obtained. RP -152 SERIES No. 38304 Spindle Bearing and Washer: The turntable spindle bearing and washer for the RP -152 Series automatic r

46、ecord changer mechanism, used in Models VA -15, V-170, V-200, V-201, V-205, V-300, and V-405, are now stocked as No. 88304. FLOCK FOR RP -152 TURNTABLE Dark taupe colored flock is available as Stock No, 37952 a lb. package) for turntable repair on RP -152 series record changers used in Models V-170,

47、 V-200. V-201. V-205. etc- The method of applying the flock is described on page 12 of the 1538 Bound Volume. RP -152 RECORD CHANGER REPLACEMENT OF RUBBER TIRES Stock No. 37873 Rubber Drive Tire On Turntable Drive Discs: 1. Remove old tire by stretching and pulling over drive disc edge. 2. Thoroughl

48、y clean drive disc to remove burrs or foreign particles. 3. Place new tire over the drive disc. Avoid any twisting or excessive stretching of the tire. 4. Roll disc and tire on a flat clean surface while simultaneously applying a slight down- ward pressure on the disc shaft. This will allow the tire to seat itself properly in the V shap