Bogen-TP160-tun-sm维修电路原理图.pdf

EBOGENINSTRUCTION MANUALMODEL TP160AM/FM TUNEROPERATING INSTRUCTIONSPOWERDepress POWER ON button to turn on tuner. Turn offtuner by depressing button again to release it to the outposition.AM RECEPTIONDepress AM button. Turn TUNING knob until pointerindicates desired station on AM (bottom) dial. Adjust TUN-ING knob until needle on tuning meter shows maximumdeflection to right.FM RECEPTIONDepress FM and FM MUTE buttons. Turn TUNINGknob until pointer indicates desired station on FM (top)dial. Carefully adjust TUNING knob until needle on tuningmeter is at the center of the tuning dial, exactly on thecircle above the letters “FM”.NOTEMuting removes the annoying noise between FMstations. The muting circuitry may prevent thereceiver from distinguishing a very weak signalfrom interstation noise. To tune in very weakstations, defeat the mute circuit by releasingthe FM MUTE switch to the out position.SPECIFICATIONSFM TUNER SECTIONTUNING RANGE: 87.5 MHz to 108.5 MHz 300 f-IQUIETING SENSITIVITY: 1.5V for 30 db 72fl0.5V for 20 db 72nHARMONIC DISTORTION: 0.3% at 100% modulation.FREQUENCY RESPONSE: 20-20,000 Hz fldb (after de-emphasis).AM TUNER SECTIONTUNING RANGE: 530 kHz to 1620 kHz.LOOP SENSITIVITY: 2V 6db S/N and 60% modulation.ALTERNATE CHANNEL SELECTIVITY: (l0 kHz) 40 db.HARMONIC DISTORTION: Less than 1% SO% modulationHUM AND NOISE LEVEL: 70 db below 100% modulation.MISCELLANEOUSALTERNATE CHANNEL SELECTIVITY: 60 db. LHFMDETECTOR BANDWIDTH: 900 kHz.CAPTURE RATIO: 1.9 db.IMAGE REJECTION: 60 db.I.F. REJECTION: 85 db.CROSS MODULATION REJECTION: 80 db.ANTENNA: 3OOfI balanced; 720 unbalanced or built-in line.AUDIO OUTPUT: Adjustable (rear panel), 0-1.2VOPERATING CONTROLS: Selector (Power, AM, FM, FMMute), Tuning.POWER CONSUMPTION: 60W 120 vac, 6OHzOVERALL DIMENSIONS: 14-l/2” W x 3-3/4” H x 12” DRACK INTERIOR DIMENSIONS: 14” W x 3-l/4” H x 11” DWEIGHT: 9-l/2 Ibs.PRlNTED IN U.S.A. 10-70ALEAR SIEGLER, INC.BOGEN DlVlSIONPARAMUS, N. J. 0765254-5516-01RadioFans.CN 收音机爱 好者资料库INSTALLATION INSTRUCTIONSUNPACKINGNOTEThis paragraph does not apply to tuners shippedas a part of a Bogen Centralized School Sound Sys-tern console or rack.If the Model TP160 AM/FM Tuner is not part of a BogenCentralized School Sound System console or rack, care-fully unpack the carton and inspect the unit for damage.If a unit shipped to you proves to be damaged, make animmediate claim with the shipping carrier. If the unit waspicked up directly from a dealer or distributor, make anydamage claim directly to the seller without delay.RACK INSTALLATIONNOTEThis paragraph applies only to tuners which willbe installed in a 19”equipment rack.The Model TP160 may be installed in a standard 19” equip-ment rack by using Model RPK31 rack mounting brackets.Remove the four screws securing the side of the cover.Do not remove the cover. Install the brackets as shownin figure 1, securing them to the tuner with the four screwssupplied with the brackets. Each bracket has two elongatedholes on three-inch centers for fastening to a standard 19”equipment rack.Figure 1 - Rack Mounting With Model RPK-31 BracketsHI-Z ANTENNA WIRAM GNDFigure 2 - Connecting AM AntennaCONNECTING AM ANTENNAAn external antenna must be installed on any ModelTP160 which will be used to receive AM broadcasts. Con-nect the antenna as shown in figure 2.Connecting To External TV AntennaCONNECTING EXTERNAL FM ANTENNAIMPORTANTAlways disconnect the FM Line Antennawhen using an external FM antenna.The Model TP160 has an internal FM Line Antenna whichmay be used for receiving FM broadcasts. For improvedreception, particularly in weak signal areas or for tunersmounted in consoles or racks, installation of an outdoor FMor “T” antenna is necessary. If you are installing a standard300-ohm antenna system, connect the twin-lead transmissionline as shown in figure 3a. If conditions require use of acoaxial transmission line, such as RG-11/U or RG-59/U,connect the cable as shown in figure 3b. Coaxial cable mustbe used when the transmission line is run in conduit.For optimum performance, a separate FM antenna is rec-ommended. If a TV antenna must be used for both FM andTV reception, install an FM signal splitter at the end of thetransmission line, as shown in figure 4.LEVEL CONTROLModel TP160 AM/FM tuners shipped with Bogen Cen-tralized School Sound System consoles or racks have theLEVEL control preset to the proper output for the boosteramplifier. Tuners shipped separately have the LEVEL con-trol set for maximum output, which is 1.2 volts.To decrease the audio output from the tuner, turn theLEVEL control counterclockwise. To increase the audiooutput, turn the LEVEL control clockwise.RadioFans.CN 收音机爱 好者资料库MAINTENANCEThere are no user serviceable parts insidethe unit and removal of the dust cover pre-servicing should be attempted only by aBOGEN SERVICEWe are interested in your Bogen tuner for as long as youhave it. If trouble ever develops with your unit, please donot hesitate to ask our advice or assistance. Write to Ser-vice Department, Bogen Division, Lear Siegler, Inc., P.O.Box 500, Paramus, New Jersey 07652.When communicating with us, give the model numberand serial number of your unit. Describe the difficultyencountered and the effects each operating control hasupon the trouble symptoms. Include details on electrical con-nections to associated equipment, and list such equipment.When we receive this information, we will send you serviceinformation if the trouble appears to be simple. If the troublerequires servicing, we will send you the name and addressof the nearest Bogen authorized service agency to which youcan send your unit for repairs.When shipping your unit, pack it carefully using theoriginal shipping carton, or a similar container and fillermaterial, to prevent damage in transit. Send the unit, fullyinsured and prepaid, via railway express or United Parcel.Do not ship via parcel post unless so instructed.DIAL CORD RESTRINGING. Refer to figure 5 and proceedas follows:a) Remove front panel by pulling off TUNING knob andremoving two Phillips-head screws.b) Connect dial cord at drum hook marked START indiagram.c) String dial around nylon pulleys and tuning shafe todrum hook marked FINISH in diagram. Make certain cordwinds around tuning shaft from rear toward front, as shown.d) Attach end of cord with tension spring, making certainthat spring applies enough pressure to prevent cord fromslipping.e) Tune in a known station and attach dial pointer at properposition. Before securing pointer, twist cord as shown indiagram so cord will exert a slight pressure toward panelbracket and away from dial glass.REPLACING DIAL LAMP. Remove front panel as describedin step a), above, and replace lamp with 6.3V No. 12 bulb(Bogen Part 94-0175-01).REPLACEMENT PARTSMost components used in the Model TP160 are avail-able through all reputable parts jobbers. The parts listedhere are available from Bogen distributors, service agenciesor directly from the factory.When ordering parts from Bogen, specify the part num-ber and description, as listed below. Also give the ModelTP160 and the Series designation, which is a letter followedby numbers stamped or screened on rear of the chassis.When ordering a part for the PC Board, also give the PCBoard component number, which is 45-9764-01.P U L L E Y (SIDE VIEW ).POINTER(FRONT VIEW)C74-1744* PROPER LENGTH WHEN SPRING IS STRETCHED TO I:Figure 5 - Dial Stringing Diagram4Ref. No. Part No. Description Ref. No. Part No. DescriptionAl 45-9764-01 RF, IF Component Board Assy,Complete79-005-044 Capacitor, Electrolytic, 2F, 25 V79-209-001 Capacitor, 5pF, 500 V79-008-057 Capacitor50 F, 50 V78-221-121 Capacitor, 470pF78-221-116 Capacitor, 180pF79-005-049 Capacitor, 25 F, 35 V78-221-113 Capacitor, 1OOpF78-250-005 Capacitor, .06 F, 50 V78-201-099 Capacitor, 6.8pF, 5%T3 96-5153-01 Transformer, 2nd AM IFT4 965157-01 Transformer, FM IFT5 96-5151-01 Transformer, FM Discriminatorc3C6c7Cl3Cl4c25C26C30c31C35,36c37C40Chassis Electrical PartsClOl-Cl04 78-201-115 Capacitor, 15OpF, 500 VCl07 78-200-100 Capacitor, 15pF, 1400 VCl08 79-005-062 Capacitor, Electrolytic,Cl09 79-005-054500F, 50VCapacitor, Electrolytic,(Same as C26)(Same as C13)Capacitor, Electrolytic,25F, 25VCl10 79-005-039700 F, 35 VCapacitor, Electrolytic,79-005-049c41C46CR1,4CR2,3FL-l, 279-005-055 Capacitor, Electrolytic, 4F, 50 V96-5093-0296-5093-0178-959-001(Same as C3)Diode, lN541Diode, lN542, Matched PairCeramic Filter, FM IF (SpecifyColor Code)FL-3 95-5158-01IC-1 96-5238-02IC-2 96523801Ll 95-5146-01MPl 94-1277-01Q1, 296-5221-01Q3,496-5235-01Q596-5237-01Q6,796-5213-01R90 77-001-691Tl 95-5156-01T2 95-5152-01Mechanical Filter, 455 KHzIntegrated Circuit, 1st FM IF .Integrated Circuit, 2nd FM IFCoil, Choke, 56 HFM Tuner AssemblyTransistor, 2N5127Transistor, 2N5126Transistor, BC147BTransistor, 2N5089Control, Mute Adj., 47 KTransformer, AM OscillatorTransformer, 1st AM IFCRlOl, 10296-5109-01CR103 96-5248-041101,102 94-0175-01LlOl, 102 95-5148-01L103 95-5159-01L104 95-5015-01Ml01 94-1309-01R107 77-001-467SW102-104 81-004-053SW101 81-003-049TlOl 83-750-0001000F, 15VDiode, lOOmA, 150 PIVDiode, Zener, 12 V, 1 WLamp, DialCoil, RF Choke, 3.9 HCoil, AM AntennaCoil, RF Choke, 1 HMeter, TuningControl, LEVELAssembly, Pushbutton SwitchSwitch, SPST, 3 A, with CoverTransformer, PowerMechanical Parts-12-4503-01 Dial Cord-12-4165-01 Dial Glass-02-9003-08 Dial Spring-22-5234-01 Cover-14-9064-01 Foot, Cover-03-0629-02 Knob, TuningALIGNMENTThe following instruments (or equivalent) are requiredfor a complete alignment of the receiver.DC VTVM, RCA WV98-CAC VTVM, HP 400DAM Signal Generator, Measurements Corp 65-BFM Sweep Generator, Measurements Corp 88 or BoontonRadio Corp 202HAM AlignmentTo completely align the AM section, start with the lastAM IF transformer and work back toward the antenna. Inorder to limit the effect of the AGC circuit, continuallyreduce the generator signal level to the minimum requiredfor an output indication. Make the adjustments listed in TableI. See figure 6 for location of alignment adjustments.FM AlignmentTo align the FM section, follow the procedure given inTable II. See figure 7 for location of adjustments.FROMGENERATOR (25A)I 1A74-1479-0115on uFigure 6 - Dummy Antenna for FM AlignmentTABLE I - AM ALIGNMENT CHART (See Figure 7)NOTE: Set Selector Switch to AMLStepBand & Dial GeneratorSetting FrequencySignalInputIndicator andConnectionAdjustment and Indication1 Indicator at Ex- 455 kHz 30%, AM Mod Through .05 MFD DC VTVM at TP-, Adjust T2 and T3 for maxi-treme left end of at 400 Hz. Generator capacitor to TP-22,2, terminal 2 of mum indication on meter. Asdial output level 5V, terminal 22 of Al.Al. a gain check, input should bemaximum less than 4V for an. output0.5 vdc above noise.2 AM at 600 kHz600 kHz, 30% AM Mod AM EXTERNAL Oscilloscope and Adjust Tl and Ant Coil L103at 400 Hz. Generator ANT. and GND. dc VTM at TP-2, for maximum indication onoutput level 1 mV, terminal 2 of Al. meter. Keep dc output levelmaximum. below 1 volt by reducing in-put as peak is approached.3 AM at 1400 kHz 1400 kHz, 30% AM Mod Same as Step 2, Same as Step 2, Adjust (first) AM OSC TRIM,at 400 Hz. Generator o above. above. (then) AM ANT TRIM foroutput level 500V, maximum indication on meter.maximum. Keep dc output level below 1volt by reducing input as peakis approached.4 Repeat steps 2 and 3, above until all outputs are peaked at the proper frequencies. As a gaincheck, 600 kHz input should be less than 3OV for output of 0.5 vdc above noise, and 1400kHz input should be less than 35V for output of 0.5 vdc above noise.TABLE II - FM ALIGNMENT CHART (See Figure 7)Set FM MUTE Switch to OUT (button out), and Selector Switch to FM (button in).Generator Signal Input Indicator & Adjustment and indicationPoint ConnectionCheck color code (paint dot) on ceramic filters FL1 and FL2 (figure 2) to determine IF centerfrequency. Frequency for each color is: Green (10.60), Black (10.65), Blue (10.67), Red (10.70).Orange (10.73), White (10.75), Yellow (10.80). Both filters in any one receiver must have samecolored dots.2 FM at 98 MHz 98 MHz 300 kHz sweep FM 300 ohm an- Oscilloscope at Adjust T4 and FM IF XFMRdeviation at 400 Hz mod- tenna terminals TP-6, terminal 6 of (in tuner) for max gain withulation. Generator out- through dummy Al. good symmetry. Adjust T5put level approx. 2OV. antenna (see fig- for optimum “S” curve.gure 6)3 FM at 104 MHz104 M H z 7 5 kHz Same as Step 2, Tuning Meter Check tracking. If necessary,sweep deviation at 400 above adjust FM OSC TRIM, FMHz modulation. Genera- RF TRIM and FM ANT TRIMtor output level approx. for max gain.lOV.4 FM at 90 MHz 90 MHz 75 kHz sweep Same as Step 2, Tuning Meter Check tracking. If necessary,deviation at 400 Hz mod- adjust FM OSC COIL, FM RFulation Generator out- COIL and FM ANT COIL forput level approx. 1OV. max gain. FM OSC COIL isadjusted by carefully compres-sing turns closer together withan insulated instrument.NOTE: Repeat steps 3 and 4 as required to obtain satisfactory tracking at both frequencies.FM MUTING CHECK5 FM at 98 MHz 98 MHz 75 kHz sweep Same as Step 2, a c V T V M a n d Record ac output level ondeviation at 400 Hz. above scope at TP-8, VTVMGenerator output level terminal 8 of Al.20V.6 Same as Step 5, Same as Step 5, above. Same as Step 2, Same as Step 5, Depress FM MUTE switch.above. above. above. Reading at TP-8 should dropabout 3 db. If required, adjustMUTE ADJ (R90) for properreading.6