Bogen-TP160-tun-sm维修电路原理图.pdf

EBOGEN INSTRUCTION MANUAL MODEL TP160 AM/FM TUNER OPERATING INSTRUCTIONS POWER Depress POWER ON button to turn on tuner. Turn off tuner by depressing button again to release it to the out position. AM RECEPTION Depress AM button. Turn TUNING knob until pointer indicates desired station on AM (bottom) dial. Adjust TUN- ING knob until needle on tuning meter shows maximum deflection to right. FM RECEPTION Depress FM and FM MUTE buttons. Turn TUNING knob until pointer indicates desired station on FM (top) dial. Carefully adjust TUNING knob until needle on tuning meter is at the center of the tuning dial, exactly on the circle above the letters “FM”. NOTE Muting removes the annoying noise between FM stations. The muting circuitry may prevent the receiver from distinguishing a very weak signal from interstation noise. To tune in very weak stations, defeat the mute circuit by releasing the FM MUTE switch to the out position. SPECIFICATIONS FM TUNER SECTION TUNING RANGE: 87.5 MHz to 108.5 MHz 300 f-I QUIETING SENSITIVITY: 1.5V for 30 db 72fl 0.5V for 20 db 72n HARMONIC DISTORTION: 0.3% at 100% modulation. FREQUENCY RESPONSE: 20-20,000 Hz fldb (after de-emphasis). AM TUNER SECTION TUNING 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% modulation HUM AND NOISE LEVEL: 70 db below 100% modulation. MISCELLANEOUS ALTERNATE CHANNEL SELECTIVITY: 60 db. LHFM DETECTOR 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), 0-1.2V OPERATING CONTROLS: Selector (Power, AM, FM, FM Mute), Tuning. POWER CONSUMPTION: 60W 120 vac, 6OHz OVERALL DIMENSIONS: 14-l/2” W x 3-3/4” H x 12” D RACK INTERIOR DIMENSIONS: 14” W x 3-l/4” H x 11” D WEIGHT: 9-l/2 Ibs. PRlNTED IN U.S.A. 10-70A LEAR SIEGLER, INC. BOGEN DlVlSION PARAMUS, N. J. 07652 54-5516-01 RadioFans.CN 收音机爱 好者资料库 INSTALLATION INSTRUCTIONS UNPACKING NOTE This paragraph does not apply to tuners shipped as 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 Bogen Centralized 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 an immediate claim with the shipping carrier. If the unit was picked up directly from a dealer or distributor, make any damage claim directly to the seller without delay. RACK INSTALLATION NOTE This paragraph applies only to tuners which will be 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 shown in figure 1, securing them to the tuner with the four screws supplied with the brackets. Each bracket has two elongated holes on three-inch centers for fastening to a standard 19” equipment rack. Figure 1 - Rack Mounting With Model RPK-31 Brackets HI-Z ANTENNA WIR AM GND Figure 2 - Connecting AM Antenna CONNECTING AM ANTENNA An external antenna must be installed on any Model TP160 which will be used to receive AM broadcasts. Con- nect the antenna as shown in figure 2. Connecting To External TV Antenna CONNECTING EXTERNAL FM ANTENNA IMPORTANT Always disconnect the FM Line Antenna when using an external FM antenna. The Model TP160 has an internal FM Line Antenna which may be used for receiving FM broadcasts. For improved reception, particularly in weak signal areas or for tuners mounted in consoles or racks, installation of an outdoor FM or “T” antenna is necessary. If you are installing a standard 300-ohm antenna system, connect the twin-lead transmission line as shown in figure 3a. If conditions require use of a coaxial transmission line, such as RG-11/U or RG-59/U, connect the cable as shown in figure 3b. Coaxial cable must be 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 and TV reception, install an FM signal splitter at the end of the transmission line, as shown in figure 4. LEVEL CONTROL Model TP160 AM/FM tuners shipped with Bogen Cen- tralized School Sound System consoles or racks have the LEVEL control preset to the proper output for the booster amplifier. 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 the LEVEL control counterclockwise. To increase the audio output, turn the LEVEL control clockwise. RadioFans.CN 收音机爱 好者资料库 MAINTENANCE There are no user serviceable parts inside the unit and removal of the dust cover pre- servicing should be attempted only by a BOGEN SERVICE We are interested in your Bogen tuner for as long as you have it. If trouble ever develops with your unit, please do not 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 number and serial number of your unit. Describe the difficulty encountered and the effects each operating control has upon 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 service information if the trouble appears to be simple. If the trouble requires servicing, we will send you the name and address of the nearest Bogen authorized service agency to which you can send your unit for repairs. When shipping your unit, pack it carefully using the original shipping carton, or a similar container and filler material, to prevent damage in transit. Send the unit, fully insured 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 proceed as follows: a) Remove front panel by pulling off TUNING knob and removing two Phillips-head screws. b) Connect dial cord at drum hook marked START in diagram. c) String dial around nylon pulleys and tuning shafe to drum hook marked FINISH in diagram. Make certain cord winds around tuning shaft from rear toward front, as shown. d) Attach end of cord with tension spring, making certain that spring applies enough pressure to prevent cord from slipping. e) Tune in a known station and attach dial pointer at proper position. Before securing pointer, twist cord as shown in diagram so cord will exert a slight pressure toward panel bracket and away from dial glass. REPLACING DIAL LAMP. Remove front panel as described in step a), above, and replace lamp with 6.3V No. 12 bulb (Bogen Part 94-0175-01). REPLACEMENT PARTS Most components used in the Model TP160 are avail- able through all reputable parts jobbers. The parts listed here are available from Bogen distributors, service agencies or directly from the factory. When ordering parts from Bogen, specify the part num- ber and description, as listed below. Also give the Model TP160 and the Series designation, which is a letter followed by numbers stamped or screened on rear of the chassis. When ordering a part for the PC Board, also give the PC Board 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 Diagram 4 Ref. No. Part No. Description Ref. No. Part No. Description Al 45-9764-01 RF, IF Component Board Assy, Complete 79-005-044 Capacitor, Electrolytic, 2F, 25 V 79-209-001 Capacitor, 5pF, 500 V 79-008-057 Capacitor50 F, 50 V 78-221-121 Capacitor, 470pF 78-221-116 Capacitor, 180pF 79-005-049 Capacitor, 25 F, 35 V 78-221-113 Capacitor, 1OOpF 78-250-005 Capacitor, .06 F, 50 V 78-201-099 Capacitor, 6.8pF, 5% T3 96-5153-01 Transformer, 2nd AM IF T4 965157-01 Transformer, FM IF T5 96-5151-01 Transformer, FM Discriminator c3 C6 c7 Cl3 Cl4 c25 C26 C30 c31 C35,36 c37 C40 Chassis Electrical Parts ClOl-Cl04 78-201-115 Capacitor, 15OpF, 500 V Cl07 78-200-100 Capacitor, 15pF, 1400 V Cl08 79-005-062 Capacitor, Electrolytic, Cl09 79-005-054 500F, 50V Capacitor, Electrolytic, (Same as C26) (Same as C13) Capacitor, Electrolytic, 25F, 25V Cl10 79-005-039 700 F, 35 V Capacitor, Electrolytic, 79-005-049 c41 C46 CR1,4 CR2,3 FL-l, 2 79-005-055 Capacitor, Electrolytic, 4F, 50 V 96-5093-02 96-5093-01 78-959-001 (Same as C3) Diode, lN541 Diode, lN542, Matched Pair Ceramic Filter, FM IF (Specify Color Code) FL-3 95-5158-01 IC-1 96-5238-02 IC-2 96523801 Ll 95-5146-01 MPl 94-1277-01 Q1, 2 96-5221-01 Q3,4 96-5235-01 Q5 96-5237-01 Q6,7 96-5213-01 R90 77-001-691 Tl 95-5156-01 T2 95-5152-01 Mechanical Filter, 455 KHz Integrated Circuit, 1st FM IF . Integrated Circuit, 2nd FM IF Coil, Choke, 56 H FM Tuner Assembly Transistor, 2N5127 Transistor, 2N5126 Transistor, BC147B Transistor, 2N5089 Control, Mute Adj., 47 K Transformer, AM Oscillator Transformer, 1st AM IF CRlOl, 10296-5109-01 CR103 96-5248-04 1101,102 94-0175-01 LlOl, 102 95-5148-01 L103 95-5159-01 L104 95-5015-01 Ml01 94-1309-01 R107 77-001-467 SW102-104 81-004-053 SW101 81-003-049 TlOl 83-750-000 1000F, 15V Diode, lOOmA, 150 PIV Diode, Zener, 12 V, 1 W Lamp, Dial Coil, RF Choke, 3.9 H Coil, AM Antenna Coil, RF Choke, 1 H Meter, Tuning Control, LEVEL Assembly, Pushbutton Switch Switch, SPST, 3 A, with Cover Transformer, Power Mechanical 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, Tuning ALIGNMENT The following instruments (or equivalent) are required for a complete alignment of the receiver. DC VTVM, RCA WV98-C AC VTVM, HP 400D AM Signal Generator, Measurements Corp 65-B FM Sweep Generator, Measurements Corp 88 or Boonton Radio Corp 202H AM Alignment To completely align the AM section, start with the last AM IF transformer and work back toward the antenna. In order to limit the effect of the AGC circuit, continually reduce the generator signal level to the minimum required for an output indication. Make the adjustments listed in Table I. See figure 6 for location of alignment adjustments. FM Alignment To align the FM section, follow the procedure given in Table II. See figure 7 for location of adjustments. FROM GENERATOR (25A) I 1 A74-1479-01 15on u Figure 6 - Dummy Antenna for FM Alignment TABLE I - AM ALIGNMENT CHART (See Figure 7) NOTE: Set Selector Switch to AM L Step Band & Dial Generator Setting Frequency Signal Input Indicator and Connection Adjustment and Indication 1 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. As dial output level 5V, terminal 22 of Al.Al. a gain check, input should be maximum less than 4V for an. output 0.5 vdc above noise. 2 AM at 600 kHz600 kHz, 30% AM Mod AM EXTERNAL Oscilloscope and Adjust Tl and Ant Coil L103 at 400 Hz. Generator ANT. and GND. dc VTM at TP-2, for maximum indication on output level 1 mV, terminal 2 of Al. meter. Keep dc output level maximum. 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 for output level 500V, maximum indication on meter. maximum. Keep dc output level below 1 volt by reducing input as peak is approached. 4 Repeat steps 2 and 3, above until all outputs are peaked at the proper frequencies. As a gain check, 600 kHz input should be less than 3OV for output of 0.5 vdc above noise, and 1400 kHz 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 indication Point Connection Check color code (paint dot) on ceramic filters FL1 and FL2 (figure 2) to determine IF center frequency. 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 same colored dots. 2 FM at 98 MHz 98 MHz 300 kHz sweep FM 300 ohm an- Oscilloscope at Adjust T4 and FM IF XFMR deviation at 400 Hz mod- tenna terminals TP-6, terminal 6 of (in tuner) for max gain with ulation. Generator out- through dummy Al. good symmetry. Adjust T5 put 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, FM Hz modulation. Genera- RF TRIM and FM ANT TRIM tor 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 RF ulation Generator out- COIL and FM ANT COIL for put level approx. 1OV. max gain. FM OSC COIL is adjusted by carefully compres- sing turns closer together with an insulated instrument. NOTE: Repeat steps 3 and 4 as required to obtain satisfactory tracking at both frequencies. FM MUTING CHECK 5 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 on deviation at 400 Hz. above scope at TP-8, VTVM Generator 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 drop about 3 db. If required, adjust MUTE ADJ (R90) for proper reading. 6