Marantz-2270-rec-om维修电路原理图.pdf

RadioFans.CN 收音机爱 好者资料库 - II Model 2210 Stereop.honic II ._ R Receiver MARANTZ CO., INC. P.O. BOX 99 SUN VALLEY, CALIFORNIA 91352 A WHOLLY-OWNED SUBSIDIARY OF SUPERSCOPE INC., SUN VALLEY, CALIFORNIA 91352 RadioFans.CN 收音机爱 好者资料库 RRAN ,.AII parts of MARANTZ products are fully gU !Jranteed for a.pericd of THREE YEARS from date of purchase, except for tubes Which are guaranteed for NINETY DAYS from date of purchase, andexceptfor speaker products. Speaker products are guaranteed as follows: all speaker and electronic components are fully guaranteed for a period of THREE y EARS from date of purchase; the cabinetry is guaranteed against manufacturing defects only, for a period of TWO YEARS from date of purchase. In the event that service is required, all necessary parts and laborwill be furnished free of charge during the above stated periods. The conditions of this Warranty,-and the extent of the responsibility of MARANTZ COMPANY, INC. under this Warranty, are as follows: 1. The purchase must have been made from an auth or ized MARANTZ dealer, 2. The Warranty extends only in favor of the.original, registered owner of the, product. 3. The Warranty Registration Card must be transmitted to MARANTZ COMPANY, INC., P. O. Box 99, Sun Valtev, California 91352, not later than TEN DAYS from date of purchase. 4. The Warranty will become void if repairs are effected by .anvone other than an authorized MARAIJTZService Station. 5. If it becomes necessary to send th is product or any defective part to MARANTZ COMPANY, INC., or to an authorized MARANTZ Service Station, all.shipping charges must be fully prepaid. If the entire instrument is sent, it mustbe shipped in its original package. No accessories should be shipped with the .product. If any accessories are shipped with the product, MARANTZ COMPANY, INC. shall have no liability whatsoever for loss of or damage to any such cessor i es , nor for the safe return thereof. 6. This Warranty shall be valid only if the purchase was. made within the United States of America. The Warranty shall not apply unless shipme nt is made by the pu rchaser to the MARANTZ Service Station from a point within the United States. If the requested repairs andlor parts exchange are within the terms of this Warranty, MARANTZ COMPANY, INC. will prepay return shipp ing charges, provided that such retu rn shipment is to be made to an address located within the United States. 7. This Warranty is void if the Serial Number has been altered or remoiied. This Warranty shall not .apply if the product has not been connected or operated in accordance with the instr uctions furn ished by MARANTZ COMPANY, INC. This Warranty shall also be void if the product has been altered or repaired in any way which MARANTZ COMPANY, INC. believes has affected .the.stability or reliability of the product. 8. MARANTZ COMPANY, INC. shall have no liability whatsoever for consequential damages: The sole responsibility of MARANTZ COMPANY INC. under this Warranty shall be limited to the repair of the product, or .replecernent thereof, in the sole discretion of MARANTZ COMPANY, INC. 9. This Warranty does not include the furnishings of labor or parts for userrnaintenance, as the same is described in the instruction manual or handbook furnished withthis product. 10. This Warranty is valid only with respect to repairs effected by an authorized MARANTZ Service Station. 11 . EXCEPT TO THE EXTENT THAT APPLICABLE LAW, PRECLUDES A DISCLAIMER OF WARRANTY, THERE IS NO IMPLIED WAR RANT Y O F MERCHANTABI LITY OR FITNESS WITH RESPECT TO THIS PRODUCT, NOR ARE THERE ANY OTHER WARRANTIES WHICH EXTEND BEYOND THE PROVISIONS OF THIS WARRANTY; ORDINARY PER IODIC CHECKUPS ARE NOT INCLUDED IN THIS WARRANTY. 12 . MARANTZ COMPANY, INC. reserves the right to make chaf)ges in design andlor improvements, upon its products without any obligation to include these changes in any products theretofore manu factured. TO PROTECT YOUR RIGHTS U.NDEF I THIS WARRANTY, FILL OUT AND MAIL THE WARRANTY REGISTRATION CARD TO MARANTZ COMPANY, INC., P.O. BOX 99, SUN VALLEY, CALIF ORNIA 91352, NOT LATER THAN TEN DAYS FOLLOWING THE DATE OF PURCHASE Should there be any questions, please contact the Marantz National Service Manager, Marantz Company, Inc. P.O. Box 99, Sun Valley, California 9 152 PU C ASERS RECORD REGISTRATION FOR MARANTZ 3-YEAR GOLDEN WARRANTY Model: Marantz Model 2270 Serial No. _ Purchasers Name _ Purchased From (Name) _ Address _ Price Paid $ _ Date Purchased _ Date Warranty Reply Card Mailed _ The above information becomes your permanent record of a valuable purchase. It should be promptly filled in at the same time that you fill in and mail the warranty registration reply card to Marantz. This information provides a valuable insurance record and must also be referred to should you have any correspondence with Marantz. RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS Preparation for Use 2 Rear Panel Connections 2 Phono 1 a turntable or record changer; an additional tuner (such as SW or LW) and a TV sound source. Record, playback, and copying capabilities are included for a tape playback deck or two recorders. For optimum performance and enjoyment from your Model 2270 Stereo Receiver , please study these instructions carefully. Installation and opera tion are not complicated, but its flexibility and features deserve your becoming familiar with its controls and connections. This manual is divided into two parts. The first covers installation and operation in simple, non technical language. The second describes the 2270 in more detail with technical specifications, fun ctional explanations, and special application dis cussions. For quick identification of the controls and con nections, references to them are printed in bold face type, exactly as they appear on the front and rear panels of your Receiver. AFTER U CKING It is advisable to save all original packing material to prevent damage should you wish to transport or ship the Receiver (refer to Figure 16 for packing instructions). Please inspect your Model 2270 carefully for any signs of damage in transit. It has undergone stringent quality control inspection and tests prior to packing, and left the factory in perfect operating condition. If the unit is damaged, notify the carrier without delay. Only the consignee may institute a claim with the carrier for damage during shipment. However, the Marantz Company will cooperate fully in such an event. Save the damaged carton as evidence for inspection by the carrier. 1 RadioFans.CN 收音机爱 好者资料库 PREPARATION FOR USE REAR PANEL CONNECTIONS All signal connections to the Model 2270, with the exception of the FM antenna and loudspeakers, should be made with shielded audio cables. Figure 1 shows the location of input and output jacks on the rear panel. These jacks are for permanent connections. Front panel jacks and their use will be discussed later. The rear panel signal connections are arranged in stereo pairs. To avoid confusion, connect one cable at a time between the 2270 and the other components of your system. In this way, you will avoid cross-connecting channels or confusing signal sources with destinations. PHONO 1 1. With the selector switch in TAPE posi tion, signals can be played from a tape recorder set for playback mode of operation. This permits playing the tape source stereo phonically or monophonically (determined by position of MONO IN pushswitch). 2. With the selector switch in any other posi tion, and while your tape recorder is recording, you can monitor the resulting tape quality by depressing the MONITOR (TAPE) pushswitch. This presumes that your recorder is equipped with separate record and playback heads and separate record and playback electronics. RECORD 1 such systems are usually designed expressly for television reception and frequently suppress FM signals before distribution. In addition, master antenna systems often severely limit good quality FM reception. Where outdoor antennas are prohibited or incon venient, use a simple form of 300-ohm, TV rabbit ear antenna or the simple ribbon-type folded dipole antenna supplied with the Model 2270. Both are practical and will give satisfactory results in primary signal areas. Your Model 2270 Receiver will accept either a 75-ohm or 300-ohm antenna. (See diagram Figure 3.) The 300-ohm antenna cable should be connected to the two terminals marked FM on the ANTENNA terminal. When using 75-ohm coaxial antenna cable, connect its shield to the G (GROUND) terminal, and its inner or center conductor to either of the FM terminals. AM ANTtNNA FM ANfNNA .NT2,N. 1.101 ,l1liIllM 0 r M . O,.; :- I <i I, o e llIJiiiile . . . , I : I , ,. lOOO UNSHIELDED . TRAN .SM tSSK)N LINE WIRE (TWIN l EAD : ! SINGLE: fM ANTEm . rM ANT N NA AVO . ,TC A. T e:A I0 !J; oori lIlIiiiil . .I. e . i3B88. ,II ,I : .: , , , , . . . SHIELD 750 COAX. soon SHI l OEO TRANSMISSiON . .SHIELD TRANSMISSION LINE LINE Figure 3. FM/AM Antenna Connection 4 RadioFans.CN 收音机爱 好者资料库 Figure 4. AM Ferrite-rod Antenna ANTENNA ATTENUATOR The ANTENNA ATTENUATOR can be switched into or out of the antenna circuit. Use the AN TENNA ATTENUATOR switch in the IN posi tion only when overloading is apparent from reception of one station at several points of the dial and is affecting reception of a desired station. Overloading may also cause severe distortion which will not disappear with proper antenna orientation. (Note: With the ANTENNA ATTENUATORswitch IN, the FM sensitivity and the number of stations that can be received are reduced.) AM ANTENNA Your Receiver is equipped with an AM ferrite-rod antenna. BEFORE USING THE MODEL 2270, PULL THE ANTENNA AWAY FROM REAR PA NEL AS SHOWN IN FIGURE 4. The ferrite-rod antenna will give you satisfactory results to primary signal areas. However, an out door antenna will provide better reception in rural areas. Two single wires are required to make an AM outdoor antenna. First, connect one end of a single wire to the AM antenna terminal on the rear panel, and the other end at a very high position out doors (the higher the better,) or swing it from the window of your room. Next, connect the other sin gle wire between the G (GROUND) terminal of your Model 2270 and an earth ground (such as a water pipe.) CONNECTION TO AC OUTLET With the front panel power pushswitch out, plug the line cord into an electrical outlet supplying the proper voltage. CAUTION: DO NOT PLUG YOUR MODEL 2270 INTO A DCOUTLET SINCE SERIOUS DAMAGE WILL OCCUR. CONVENIENCE OUTLET One UNSWITCHED and one SWITCHED AC OUTLET are provided on the rear panel for powering associated components of your system (tape recorder, record player, etc.). SIMPLIFIED OPERATING PROCEDURE When operating the Model 2270 Stereo Receiver for the first time, follow these simple directions. Later, full advantage can be taken of its versatility with the remaining controls and pushswitches. Step 1. Connect the FM antenna to the appro priate terminals on the rear panel. Step 2. Connect the speakers to the MAIN speaker terminals. Step 3. Check that all pushswitches are in the out position. Pushswitches in the in position should be depressed for releasing to the out position. Step 4. Turn the volume control all the way to the left (counter clockwise) and set the balance control in mid-position (pointer to dot at 12 oclock). Step 5. Rotate treble, mid, and bass controls to the 12 oclock position (each pair of pointers to dot). Step 6. Set MAIN Speaker pushswitch in, and REMOTE out (assuming your loudspeakers are connected to the MAIN amplifier terminals) . Step 7. Turn on system power by depressing the power switch. Step 8. Select the desired program source by setting the selector switch to the appropriate position. If FM or AM is selected, rotate the Gyro-Touch 5 RadioFans.CN 收音机爱 好者资料库 TUNING knob until the desired station is tuned. Adjust the volume control for comfortable listening volume. The tuner section of the Model 2270 is equipped with electronically triggered circuits which auto matically mute interstation noise and automati cally switch to the proper mode of operation for stereo and monophonic FM broadcasts. In addition, the STEREO indicator light automatically indi cates a stereo broadcast. TUNING METERS The Model 2270 is equipped with two meters, a SIGNAL STREIIGTH MU LTIPATH meter and a TUNING meter. 1. The SIGNAL STRENGTH/MU LTIPATH Meter is dual purpose: a. In normal operation, it indicates the sig nal strength of the AM or FM signal to which your receiver is tuned. b. If you push in the MULTIPATH push switch - and only so long as you hold it in -this meter will indicate multipath, to enable you to point your FM antenna in the best direction to optimize FM re ception. 2. The TUNING meter operates on FM only and indicates correct station tuning. TUNING AM: For optimum AM reception, tune to the desired station. Then rotate the tuning knob slightly back and forth until the maximum reading is obtained on the SIGNAL STRENGTH Meter. The TUNING Meter is not used for AM. FM: Switch the selector to FM and tune to the desired station. Then slowly rotate the tuning knob slightly back and forth until maximum reading is obtained on the SIGNAL STRENGTH Meter, and the TU NING Meter points to the center scale position. Your Receiver is now properly tuned. FM ANTENNA ORIENTATION With a rotatable FM antenna, you may further opti mize FM reception by pointing the antenna to the proper direction for minimum multipath. First tune to the desired station as above. Then ho ld in the MULTIPATH pushswitch while you rotate the FM antenna. Stop the antenna at that position for which minimum deflection is indicated on the MULTIPATH meter. Then release the MULTIPATH pushswitch to restore the meter to its normal SIG NAL STRENGTH function. MONO IN L, R)SWITCH Depressing both MONO IN (L, R) pushswitches will convert all input signals to the monophonic mode excluding signals at the rear panel record and front panel TAPE dubbing jacks. While playing a single channel source such as TV or AM, depress both MONO IN (L, R) push switches to feed the signal through both channels. When playing a monophonic phonograph record, usethesepushswitches to suppress rumble, common mode noise and pinch - effect distortion. TAPE/SOURCE MONITOR SWITCH When this pushswitch is out (SOURCE) the program being recorded and heard is determined by the set ting of the selector switch. With the MONITOR pushswitch in (TAPE), the amplifier input connec tions are switched to the output of the tape recor der without affecting the signal presented to the tape recorder without affecting the signal presented to the tape recorders input. Thus you may listen to the source signal before and after it is recorded (on a 3-head tape recorder). A tape recorder to be monitored is selected by this pushswitch. When