Lafayette LR-9090 Owner'S Manual Download | Manualshive

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Summary of Contents for LR-9090

Page 1: ......

Page 2: ...Laffi tt Laby tt Laffi tt Lafdett LR 9 9 AM FM Stereo Receiver e e OWNER S MANUAL Lahy tt ...

Page 3: ...Model LR gOgO lStock No 99 0367bW1 AM rN DOLBY SYSTEM STEREO RECET ER DC DC nrrro DoLBy ARE TRADE MARKS oF DoLBy LABoRAToRTEs ...

Page 4: ...EcTRoNIcs coRPORATTON RESERVES THE R lT TO MAKE DESIGN CHANGES OR MODIFICATIONS AT ANY TIME WITHOUT INCURRING ANY OBLIGATION TO INCORPORATE THEM IN PRODUCTS PREVIOUSLY SOLD j I j i n L ia i EIill OofrGlrt co rtldlrtD lttr lYtltlwrtr mDrc rECrloXl0t 00lt0mll0X o tlo3rlt L l IJl llttt r lll ll3lll3 lEtElUlo ...

Page 5: ...ing Phono lnput Sensitivity On The Receiver n StereoTapeRecorderOperation rr Recording Playback using one tape recorder 21 Simultaneous Recording tworecordersconnected 21 Duplicating tworecordersconnected 21 Playback ltwo recorders connected r 8 TrackTapePlayerOperation 22 MicrophoneOperation 22 BassandTurnoverswitchAction r2 PowerOverload ProtectionCircuit 24 TROUBLE SHOOTING GUIDE 24 RETURNING T...

Page 6: ...a driver for the tuning meters and as a sophisticated FM muting circuit which not only elimi nates noise between stations on FM in the conventional manner but also silences the receiver when not properly tuned to a station x Dual Meters used a conventional signal strength meter plus an FM center tuning meter for precise tuning x Built in Dolby Noise reduction circuit for decoding Dolby FM broadcas...

Page 7: ...opstick built into the rear of the receiver assures adequate reception of all local AM stations However in the fringe areas high noise areas or where surrounding metal objects interfere with normal reception a 20 30 foot length of insulated antenna wire can be connected to the terminal designated AM See Figure 1 A NOTE The ferrite loopstick is mounted on a swivel bracket For maximum signal pickup ...

Page 8: ...EXTERNAL ANTENNA CONNECTIONS r FM 75 L ANTENNA GND AM INNER CONDUCTOR INNER CABLE CLAMP sffi 112 3 4 w INsuLATIoN SHIELD BRAID 75 OHM COAXIAL CABLE 1 Remove approx 1 114 of outer insulation from cable 2 Remove all but 3 8 of the shield braid 3 Remove inner insulation leaving 3 16 of the insulation exposed The center conductor should be approx 1 2 long FM ANTENNA CABLE CONNECTION FIGURE 1 B 75 OHM ...

Page 9: ...lded cable is also required in amplified distribution systems The 75 ohm lead in cable to the receiver is connected as shown in Figure 1 B Prepare the end of the cable as shown loosen the cable clamp 2 screws then slip the shield braid section under the clamp Wrap the center inner conductor around the 75O screw terminal and tighten the screw firmly Now secure the cable clamp tightly against the sh...

Page 10: ...nnected to the receiver If you intend to use only one set of speakers for normal stereo simply connect the two speakers to the Left and Right speaker terminals marked A SPEAKERS Figure 3 shows the method used to connect the speaker leads to each set of terminals To connect a lead remove approximately 3 8 of insulation from its end and twist the bare strands of exposed wire together Press the lever...

Page 11: ...en two or three sets of stereo speakers are connected no speaker should have an impedance rating of less than 8 ohms most high fidelity speakers today are 8 ohms impedance or higher Remove insulation from wire end Twist stranded wire TO O SPEAKER TERMINAL TO SPEAKER TERMINAL FIGURE 3 CONNECTING SPEAKER LEADS TO THE RECEIVER OUTPUT TERMINALS _ TERMINAL TERMINAL ...

Page 12: ...m the record player to the left and right PHONO 1 inputs If you wish to use a second record player connect its output cables to the PHONO 2 inputs Set the MAG HI LO switch to the HI position initially a procedure for determining the optimum position of this switch is provided in the section titled Adjusting Phono Input Sensitivity On The Receiver To select either of the phono inputs set the SELECT...

Page 13: ... sf EI E f I II s F U E u v o U E F o eF GE j E E HE3 6 U E E q eE EJ EUA eirH F br u YE o o F 6 F f d l c zt n YO 9c Fe o E J l g a vo cF go a6e j e o1 x E 6 U E o 2 f o E 9 5 J z 22 9 ts eeFS i p l4 o Y o F 6f q tr td o z o u G E u EO o FO u G G u uO d d o r Fo 4 E 9w ob 6 F E d otr tr 3d 15 11 ...

Page 14: ...L AM AUX Selects the outputs of a stereo record player connected to the PHONO 1 inputs on the receiver Selects the outputs of a stereo record player connected to the PHONO 2 inputs on the receiver Selects Automatic FM Stereo reception In this position a special high frequency filter is switched into the circuit to reduce any high frequency noise that may occur during FM stereo reception See sectio...

Page 15: ...omatically reduced and the receiver will assume a normal tonal response MODE SWITCH This switch determines the manner in which program sources will be reproduced by the receiver MONO A program source connected to left and right channel input jacks is mixed and reproduced through both channels and speakers Also a single program source connected to either the left or right input jack is automaticall...

Page 16: ...desired For further information on the action of this switch see Bass and Treble Turnover Switch Action in a subsequent section of this manual LOW FILTER SWITCH A sharp 12 dB octave filtering action can be introduced at either of two frequencies 15 Hz or 40 Hz the center position is off Generallyo the use of the low filters is only required where low frequency rumble or vibration is encountered wh...

Page 17: ...e emphasize these high frequencies Although this may create the illusion of a loss in the highs the response is actually being returned to a normal condition SPEAKER MODE SWITCH This switch turns the receiver on and allows you to select one of the five listening modes POWER OFF In this position AC power is disconnected from the receiver and no sound will be heard AC power is ON in all other positi...

Page 18: ...M reception is stereophonic When you a re tuned to a monophonic FM station the STEREO Indicator will not light Any stereo station which produces an unsteady flickering stereo indication must be considered too weak or noisy for proper stereo reception although it may be good enough for mono receptionl Note that placing the MODE switch in the MONO position will disable the automatic FM stereo switch...

Page 19: ...d players or tape recorders For FM reception you must have an external antenna properly connected as indicated previously Then connect the AC power cord to an electrical ouilet supplying 105 120 volts 50 60 Hz AC Refer to the charb titled Quick Guide To Operating Your Receiver and set all operating con trols and switches in the positions indicated for the particular type of operation desired When ...

Page 20: ...ing interference These electrical disturbances are usually picked up by the antenna lead in if you are using a roof antenna and can sometimes be reduced by using 75 ohm shielded cable REDUCING NOISE ON FM STEREO 1 If the noise is present when the MODE switch is in STEREO but disappears when set to MONO you should try the filter provided in the MPX FIL position of the program selector This filter h...

Page 21: ... is improperly tuned causing the pointer to move outside the shaded area shown in Diagram A muting will automatically occur and the receiver will be silenced This action will take place even with the strongest signal This unique form of detune muting is designed to guard against improper FM tuning NOTE Rapid tuning across the dial will cause the receiver to remain in a state of almost con tinuous ...

Page 22: ...h sets of Phono inputs Phono 1 and 21 If two record players are to be used with the receiver identical or very simi lar cartridges in terms of output level should be used for each record player 2 Set all controls for FM Stereo operation See chart headed Quick Guide to Operating the Receiver 3 Tune in a strong FM station and set the VOLUME control to produce normal listening volume Leave the volume...

Page 23: ... The TAPE A REC and the TAPE B REC output jacks will automatically produce a stereo recording output during reproduction of a proglam through the receiver If you wish you may facilities 3 head IMPORTANT monitor tape recorder 8 providing tape recorder B has tape monitoring machine by setting the MONITOR switch on the receiver to the B position Do not set the MONITOR switch to the A position since t...

Page 24: ... announcements etc However the output of the micro phone s cannot be recorded When using two microphones you will need to connect them to a 3 conductor phone plug the type used by stereo headphones A single microphone with a 2 conductor phone plug may also be plugged into the 1yfIC jack which will connect it to the left input channel in the receiver Micro phones used should have an impedance betwe...

Page 25: ...ver some experimentation with the 500 Hz position should be undertaken to determine the position which provides the most desirable Bass control action with your complete system Treble Turnover Switch In the 2 5 KHz position frequencies from about 2 5 KHz begin to be affected by the Treble con trol with maximum rated boost or cut taking place at 10 KHz In the SKHz position frequencies from about 5 ...

Page 26: ... an adjacent wire The overload protection circuit is self resetting Once the cause of the power overload is located and the problem rectified normal operation wiII resume WARNING MAINTENANCE Do not attempt to remove the cover there are no user serviceable parts inside this receiver Refer servicing only to qualified personnel See Returning The Unit For Service TROUBLE SHOOTING GUIDE If any trouble ...

Page 27: ... purchased In most cases this will be your fastest and most efficient method of obbaining service If you wish to ship the unit to our main service center please read the instructions which follow SHIPPING INSTRUCTIONS Pack the unit very carefully to avoid damage in transit preferably in its original carton If the origi nal carton is not available use a sturdy carton with at least 6 inches of crump...

Page 28: ... dB at 100 Hz TREBLE CONTROL RANGE 2 5KHz Turnover t 10 dB at 10 KHz 5 KHz Turnover t 10 dB at2O KHz MID CONTROL RANGE t6dBatlKHz LOW FREOUENCY FILTER 12 dB octave 15 Hz 3 dB 7 Hz 12 dB 40 Hz 3 dB 20 Hz l 12 dBl HIGH FREOUENCY 7 KHz l 3 dBl 14 KHz 12 dB 12 KHz 3 dB 24 KHz 12 dB LOUDNESS 50 Hz 12dB 10 KHz 3 5 dB AUDIO MUTE _2OdB TAPE ourPUT LEVEL 0 15 v output at rated input sensitivity FM SECTION ...

Page 29: ...ITIVITY tlHFl 2OpY antterminall IMAGE REJECTION 60 dB at 600 KHz SELECTIVITY alternate channel 45 dB SIGNAL NOISE RATIO 45dB TAPE OUTPUT LEVEL O 3Volts ANTENNA Built in adjustable ferrite bar plus provision for external antenna At 1 MHz 1 mV input signal 30 Mod At 1 MHz GENERAL SOLID STATE DEVICES 8 lCs 2 MOS FETs 4 Dual Transistors 43 Transistors and 41 Diodes AC POWER REOUIREMENT 105 120volts 50...

Page 30: ...La RADIO ELECTRONICS CORPORATION I lll Jericho Turnp Syosset L NewYork 11791 KTR9090 XX Printed in Japan ...

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