Crosley-Corp-75 电路原理图.pdf

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1、MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS FOR CROSLEY MODELS 82CP, 82CQCHASSIS MODEL NO. 7S STARTING THE CHANGERTurn the control knot) clockwise to the ON position; after the turntable has attained speed, turn the control knob all the way counter clockwise to the REJ.” position for a few seconds

2、and release. The bottom record will fall on the turntable and the unit will automatically play the entire stack of records. If the changing cycle should fail to start, repeat the above operation. REJECTING A RECORDTo reject a record, it is only necessary to turn the control knob counter clockwise to

3、 the “REJ.” position for a few seconds and release. A record can be rejected anytime the aeedle is in contact with the record. UNLOADING THE CHANGERTurn the control knob to the “OFF” position and remove the center spindle by Dulling straight up The played records may now be easily removed after whic

4、h the center post should be replaced. The center spindle must be turned when being replaced so that it drops into correct position. TO PLAY RECORDS MANUALLY MANUAL OPERATIONManual operation is used for all home recordings and for single records is desired. CAUTION: For play ing records of less than

5、10 diameter always set the record holding shelf in same position as is used for playing 12 records. Otherwise “Floating Jewel Tone System” may be damaged. 1. Remove the center spindle by pulling straight up. 2. Place record on turntable with desired selection upward. 3. Turn the control knob to the

6、“ONf position. 4. Place pickup on record so the needle enters the outside groove of the record. 5. Adjust volume control to desired level. 50 CYCLE OPERATION_(Phonograph)If operation is desired on 50 cycle current, a small spring, see parts list, must be added to the motor shaft. SERVICEIf your rece

7、iver fails to operate satisfactorily, check the tubes to see that all are pushed well down into their respec tive sockets and that all grid clips are securely in place on the top caps of the tubes. Check the antenna (loop terminals), and power supply connections for good contact. If this visual insp

8、ection does not reveal the source of the trouble, disconnect the receiver from the power supply and call a competent service man, preferably your Crosley Dealer. ALIGNMENT PROCEDURE Preliminary Output Meter Connections. Generator Ground Connection. Dummy Antenna to be in series with generator output

9、. Position of Volume Control.*. Position of Tone Control. .Plate to Plate of 6K6GTs To Chassis or Ground Lead .See Chart Below .Fully On .Treble or Speech Align ment Sequence Dummy Antenna Frequency Setting Input Connection to Receiver Band Switch Tuning Cond. Setting Trimmer Adjusted Remarks 1. .02

10、 MF. 455 Kc. Stator lug Rear sec tion of Gang Cond. B. C. Fully open 2nd I-F (2) 1st I-F (2) Adjust for Maximum. Adjust for Maximum. 2. .0002 MF. 1650 Kc. Ant. Terminal B. C. Fully open B. C. OSC” Trimmer Adjust for peak; gang does not have to tune thru signal. Loop must be connected. 3. .0002 MF. 6

11、00 Kc. Ant. Terminal B. C. Approx. 60 on dial B. C. OSC” Series Trimmer Adjust for maximum output while rock ing gang thru signal. 4. Repeat Step No. 2 to check possible shift due to series adjustment. 5. .0002 MF. 1400 Kc. Ant. Terminal B. C. Approx. 140 on dial B. C. ANT” Trimmer B. C. R-F” Trimme

12、r Adjust for maximum output do not touch B. C. Osc. Trimmer. Adjust for maximum output. 400 ohm (carbon) 400 ohm (carbon) Ant. Terminal Ant. Terminal S. W. Fully open S. W, Approx. 18 Repeat the above alignm*:. procedure for more accurate adjustments. Always action of the A. V. O. cii- sit. c w ncr

13、Adjust for peak. Gang does not have a. w. oat t0 tune t|lru 8ignai. S. W. “ANT” Adjust for maximum output while Trimmer rocking gang thru signal. keep signal generator output as low as possible to prevent S. W. “ANT” Trimmer IMPORTANT ALIGNMENT aoTESWhen aligning the shortwave bands “OSC” trimmers c

14、are must be exercised to see that the circuits are aligned on the correct frequency and not on the image which is approximately 910 kilocycles less as indicated on the Receiver dial. To check, increase generato; output, tune-in the generator frequency and then tune-in the image frequency which shoul

15、d be weaker than the fundamental and come in approximately 910 kilocycles lower on the Receiver dial than the fundamental. If image cannot be tuned-in, the “OSC” trimmer is adjusted to the wrong peak, (Correct peak is the second peak on trimmer from the closed position). TUBE VOLTAGE CHART SOCKET VO

16、LTAGES MEASURED AT 117.5 V. LINE (BETWEEN SOCKET PIN AND CHASSIS) WITH 1000 OHM PER VOLT, 500 V. RANGE VOLTMETER (D. C.) TUBE FUNCTION 1 PIN NUMBER 2 3 4 5 6 7 8 6SK7GTR. F. Amplifier. 0 0 0 0 0 82 6.3 A. C. 210 6SA7GTOSC.Mod. 0 0 210 82BC 0 0 6.3 A. C. 0 6SK7GTI. F. Amplifier. 0 0 0 0 -6.5BC - -0SW

17、 - 82 6.3 A. C. 210 6SQ7Det. A. S. C. 1st A. F. 0 0 1.4 0 0 78 6.3 A. C. 0 6J5GTPhase Inverter. . 0 0 125 N. C. 0 0 6.3 A. C. 5.2 6K6GT(2Output . . . .u . . 0 0 JW* 200 210 0 0 6.3 A. C. 13 5Y3G Rectifier. -n N. C. 300 N. C. 338 J. B. 338 A. C. J. B. 300 MAX. POWER OUTPUT.6.5 WATTS POWER CONSUMPTION

18、. 85 WATTS DROP ACROSS SPEAKER FIELD. . 90 VOLTS N. C.No Connection COMPILED BY M. N. BETTMAN. SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS WIRING DIAGRAM. MODELS B2CP AND B2C9 CHASSIS MODEL N. 75 THE AUTOMATIC RECORD CHANGERThis record changer will autom

19、atically play a series of twelve 10* or ten 12 records of the standard 78 R. P. M. type. The records must be all one size when loading, and may consist of less records than listed above. Records of any size up to 12 may be played manually. JVj ?r * CAUTIONS1. Never use force to start or stop the mot

20、or or any part* of the record changing1 mechanism or pick-up arm. 2. The use of records which have become warped or damaged through* improper care may cause the* mechanism to jam and damage the instrument. 3. Do not leave records on the supports, as they may warp, particularly in warmer climates. 4.

21、 Never leave the pickup arm with the needle resting on a record or the turhtable. THE FLOATING JEWEL TONE SYSTEMThe Floating Jewel Tone System” is a Crosley invention and an exclusive feature on your Crosley phono-combination. Its sapphire point literallv floats across the surface of the record, red

22、ucing record wear and assuring maximum tonal fidelity. Needle noise is virtually eliminated. The “Floating Jewel Tone System” supplied with the phono-combination you have purchased is good for years of normal service. CAUTION: Avoid dropping the tone arm on a record or the turntable. Use only the Cr

23、osley “Floating Jewel Tone System” with your set. SETTING FOR SIZE OF RECORDThe shelf on the record holder post or the side support for the records mav be turned and snaps into place in two points, one for the ten inch records, and the other for the twelve inch records. When the record holder clip (on top of the record holder post) is toward the center spindle, the number showing on the record holder clip is the size record the changer is set to automatically operate. 收音机爱 好者资料库 RadioFans.CN