Denon-TU767-tun-sm维修电路原理图.pdf

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1、DENON HI-Fi Component/Tuner SERVICE MANUAL MODEL TU-767 AM-FM STEREO TUNER TABLE OF CONTENTS SPECIFICATIONS ? 2 CONTROLS AND THEIR DESCRIPTION ? 3 BLOCK DIAGRAM ? 3 CONNECTIONS ? 4-5 METHOD OF ADJUSTMENTS ? 6-8 SEMICONDUCTORS ? 8-10 PRINTED WI RING BOARD PATTERNS AND PARTS LIST ETC0658J TRAP UNIT ?

2、10 ETC0660N DISPLAY UNIT ? 10 ETC0659L TUNER UNIT ? 11 CONNECTION DIAGRAM ? 12 WIRING DIAGRAM ? 13 EXPLODED VIEW OF CHASSIS AND CABINET ? 14 NIPPON COLUMBIA CO., LTD. RadioFans.CN 收音机爱 好者资料库 TU-767 SPECI F ICATIONS FM SECTION Frequency Range: Antenna Terminals: Practical Sensitivity: S/N 50 dB Sensi

3、tivity: 87,5 108 MHz 75 ohm unbalanced 0.9 AV (10.3 dBf) Stereo: 15.8 MV (35.2 dBf) Antenna Terminal: Usable Sensitivity: Selectivity: Image Interference Ratio: Singel-to-noise Ratio: With Loop Antenna 18 AV 55 dB 45 dB 55 dB Monaural: 1.5 AV (14.2 dBf) Total Harmonic Distortion: 0.3% 0 dBf at 10-15

4、w (new IHF Standard) Output Level (at 30% Image Interference Ratio: 90 dB modulation): 0.2 V IF Interference Ratio: 100 dB AM Suppression Ratio: 65 dB LEVEL CHECKING SIGNAL Effective Selectivity: Wide = 50 dB Frequency: 440 Hz Narrow = 60 ? (t300 kHz) Output Level: 0.3 V Capture Ratio: 1.0 dB Electr

5、ic Field Strength Frequency Characteristics: +02 20 Hz to 15 kHz ?dB Indication: by 7 LEDs (Green) Signal -to-noise Ratio: Monaural: 88 dB OTHERS Stereo: 82 dB Power Supply: AC 220 V/50 Hz Total Harmonic Distortion Monaural Power Requirement: AC 11 W (at 75 kHz deviation) Dimensions: 434 mm (17.1)W

6、x 66 mm (2.6) H x 1 kHz ?0.03% 281 mm (11.1)D Stereo Net Weight: 3.6 kg (7.94 lbs.) (at 67.5 kHz deviation) 1 kHz ?0.04% Stereo Separation: 1 kHz 57 dB Muting Operating Level: 20 dB Output Level (at 75 kHz deviation)t 0.6 V AM SECTION (MW) Frequency Range: 522 1611 kHz Design and specifications subj

7、ect to change without notice. RadioFans.CN 收音机爱 好者资料库 Fig. 1 .1 .3 haSl ?Ow Is v-. CF1 ? CF2 Wde IF Amp IF Amp IF band Selector Switch CF3 ?CF4 Pet. Rect. IF Amp IF Amp Muting ON/OFF FM Antenna 0 ? 75 ohm SSS Controller AM Loop Antenna ?0 Bandsuppres Circuit Front End Narrow B.P F FM Demodu- lator I

8、III 0 Output L Output R Amp 9 EC Oscillator Signal Selector Switch L.P.F ? Amp Stereo Demodulator L.P.F Amp AM RF-IF Del Monaural/ Stereo Selector Switch Signal to AC line Signal/Noise Indicator Quality ?SSS Indicator ?Indicator Fig. 2 ALL Controller Control Switch Display Driver FM ?MHz Frequency D

9、isplay PIP Roof Filter Roof Filter Tuning,FM/AM Memory Preset Noise Switching Display Driver Stereo Indicator TU-787 MIMI CONTROLS AND THEIR DESCRIPTION 0 POWER (Power on/standby Switch) Note: The power switch contains an ON/OFF indicator (except in models exported to Europe) REC (Recording Level Sw

10、itch) IF BAND (IF Band Selector Swich) MODE (Mode Switch) a. Auto/Mute, ?Mono 0 SCAN (Tuning Mode Select Switch) AL Auto, ?Manual I SSS I ON/OFF (See Page 8 for Details Regarding the Super Searcher System-I SSSI ) 8 AM FM 0 DIGITAL FREQUENCY INDICATOR BLOCK DIAGRAM SSS Switch (110 STEREO (Stereo Ind

11、icator) SIGNAL/NOISE LEVEL ? . Signal ?AL Noise QUALITY (Quality Indicator) SSS (Super Searcher System Indicator) PRESET CHANNEL 1 8 (Station Presetting Buttons) 8 MEMORY (Memory Button) QM CONTROLLER (Super Searcher System Control Knob) TUNING (Tuning Buttons) ? Up , ? Down I 3 I= 0 FM INDOOR ANTEN

12、NA DIRECTION OF BROADCASTING STATION FM ANTENNA It 75 ohm coaxial cable AM OUTDOOR ANTENNA 12 m or longer sizes are approximate /f/i/, (FOR WEAK WAVE RECEP- TION/ 1. Ground the wire to the earth when an outdoor antenna Is used. 2. Do not detach the lead wires of the loop antenna from the terminals.

13、ACCESSORY LOOP AN- TENNA Removal of AM loop an- tenna Move the supporting rod of the loop antenna up- ward to remove the an- tenna. INSERT 0E2 To tuner terminals 00 Do oaci .00 ut.te PRE AMPLIFIER WALL OUTLET Fig. 3 DIN CONNECTOR J 8m or longer )111111111ITU-767 CONNECTIONS PRECAUTIONS ON CONNECTION

14、S Do not plug the cord into an AC outlet until all connections of the unit are completed. CONNECTION WITH AUDIO AMPLIFIER Connect the pin. cord (supplied) between the OUTPUT terminals of the tuner and the tuner input terminals of the audio amplifier. Be careful to connect the left (L) and right (R)

15、channels of the output terminals to the corresponding left (L) and right (R) channels of the tuner input terminals. (Set the volume control of the audio amplifier to mini- mum). Do not bundle or wind the pin plug and the power source cord together, and do not place the pin cord near the power transf

16、ormer; otherwise, hum noise may result. Insert the plugs into the corresponding jacks firmly because incomplete connections cause electric field noise. FM ANTENNA COAXIAL CABLE Li Fold back about 12 mm of braid. If core is stranded wire, bind the tip with solder. B mm 3 mm E77 After tightening the c

17、ap, check that the cable shows no sign of comming loose. SOLDER OUTDOOR ANTENNA GROUNDING ROD Fig. 5 TU 767 MINI1 ANTENNA INSTALLATION FM OUTDOOR ANTENNA CONNECTION (Fig. 4) 75 ohm coaxial cable (3C-2V, 5C-2V) is preferable to obtain better performance of the tuner. * Contact your local dealer for d

18、etails on selection and installation of the FM outdoor antenna. * When a 300 ohm FM antenna is connected by a 75 ohm coaxial cable, a matching transformer is required. AM ANTENNA CONNECTION (Fig. 5) Since the model is provided with a high performance AM loop antenna on the back panel, this accessory

19、 antenna can effectively be used for optimal reception in places where broadcasting stations are located nearby and relatively strong signals are received with low noise. Orient the loop antenna horizontally to obtain optimal reception. In places where strong, clear signals are not received due to p

20、articular location and/or environmental conditions, connect an insulated wire to the AM antenna terminals and attach it to the wall. In places where broadcasting stationa are located too far away and only weak signals are received, or where signals are blocked by obstacles, install an AM outdoor ant

21、enna. * Even if an AM outdoor antenna is installed, do not detach the AM loop antenna. GROUNDING If there is much noise during reception, it is recommended that a grounding wire be used. Connect a thick insulated wire to the GND terminal, and wind the unconnected bare end around a metal water pipe,

22、a grounding rod, or a grounded copper plate. * Never connect grounding the wire to a gas pipe. This could cause fire or explosion. Fig. 4 LOOP ANTENNA METHOD OF ADJUSTMENTS When marking adjustments, be sure the power supply is at the rated voltage and the room air is in normal condition with respect

23、 to temperature and humidity. ADJUSTMENT OF RF TRAP UNIT (ETC(1658J) (ISSSI on,MODE . mono) Table 1 Adjustment Item Tuning Input Side Output Side Adjustment Point Adjustment Value Measuring Instrument Frequency Input Level Modulation Connection Point Measuring Instrument Connection Point 1 88 MHz Tr

24、acking Check 88.0 MHz FM SSG 88.0 MHz Variable depending on output wave- form attenuation Mono ?1 kHz 100% Antenna Terminal Digital Voltmeter VC. G 3 V t 10 mV at the time of adjustment to the max. point of output waveform attenuation using the ISSSf controller 2 108 MHz Tracking Check 108.0 MHz FM

25、SSG 108.0 MHz Variable depending on output wave- form attenuation _ kHz ono ?1 100% Mono Antenna Terminal Digital Voltmeter G 20 V t 100 mV at the time of adjustment to the max. point of output waveform attenuation using the ?SSS ?controller 3 If NG in items 1 and 2, advance to items 4 to 6 4 108 MH

26、z Tracking 108.0 MHz FM SSG 108.0 MHz Variable depending on output wave- form attenuation Mono ?1 kHz 100% Antenna Terminal , Oscilloscope Output IL) TC1 Output waveform attenuation is max. at 20 V i 50 mV 5 88 MHz Tracking 88.0 MHz FM SSG 88.0 MHz Variable depending on output wave- form attenuation

27、 Mono ?1 kHz 100% Antenna Terminal Oscilloscope Output (LI LI Output waveform attenuation is max. at 3 V 5 mV 6 Repeat the adjustment in items 4 and 5 so that the waveform attenuation is maximum at the rated voltage 7 Adjustment of Attenuation 98.0 MHz FM SSG 98.0 MHz Variable depending on output wa

28、ve- form attenuation Mono ?1 kHz 100% Antenna Terminal Oscilloscope Output ll.) VRI Adjust to max. attenuation after adjustment to the max. point of output waveform attenuation using the ?SSS controller Normal Output Waveform Distortion of Output Waveform due to Input Attenuation Fig. 6 9 at 0 2 0 -

29、f- -n CONNECTION DIAGRAM OF MEASURING INSTRUMENTS FM ? Table 2 Adjustment Item Tuning Input Side Output Side Adjustment Point Point Adjustment Value Remarks measuring Instrument Frequency Input Level Modulation Connection Point Measuring Instrument Connection 1 76 kHz 98.0 MHz FM SSG 98.0 MHz 60 dBp

30、 Mono 1 kHz, 100% TA:rt4747 , Frequency Counter TP-3, 4 VS 201 76 kHz 050 Hz 2 Adjustment 98,0 MHz FM SSG 98.0 MHz 50d59 Mono 1 kH, 100% rAztrreninnea, Tuning Meter JIg T P-1,2 T2 Tuning Meter Canter J. IF ?wide 3 Mono Distortion gen MHz FM SSG 98.0 MHz BO dl3p Mono 1 brie, 100% Antenna Terminal Dis

31、tortion Meter Output IL/ 13 Min. Distortion IF ?-111. ?wide 4 Stereo Distortion 98.0 MHz FM SSG 98.0 MHz 60d80 Stereo IL) ?1 kHz Main ?90% Pilot ?10% Antenna Terrninal Distortion Meter Output (1.) Front End I FT Mtn. Distortion IF AL wide 5 Tuning Center Distortion Adjustment Repeat Items 2 to 4 so

32、that the tuning meter may indicate Its center value, and the distortion is minimum at tuning time 6 OffsettTu2strnent 980 MHz FM SSG 98.0 MHz 60 dBp Mono 1 kHz, 100% DC Voltmeter IF-B, GND VS 401 100 0 10 rnV ?,84Yr4c47.74t4 e; , Noise Indicator LED ON Level 98.0 MHz FM SSG 98.0 MHz 3409 Mono 1 kHz,

33、 100% Antenna Terminal VS 402 7th N ?LED ?By SSS controller oise ON ?In J. noise mode 8 SLIgErigoInNdItcreavetoir 98.0 MHz FM SSG 98.0 MHz Llsgi8n4 Mono 1 kHz,100% TAenrt4747, V R 4 Quality LED ?By SSS controller ON ?in J noise mode 9 QLuzlgyoiNntlec,at.oi r 98.0 MHz FM SSG 98.0 MHz 50 dBp Mono 1 kH

34、z, 100% Antenna Terminal VS 403 7th Signal LED ?By SSS controller ON ?In JIL noise mode 10 _ RECAdLieuvsetZuttput 98.0 MHz FM SSG 98.0 MHz 60 deg Mono 1 kHz, 100% Antenna Valve Voltmeter Output IL/ VS 3 6 df3 x 1 dB of 100% Output ? SEC . on 11 Pilot Cancel! 980 MHz FM SSG 980 MHz 60459 Stereo ILI ?

35、 10% Pilot Antenna Terminal Valve Voltmeter Output ILI VS 202 Min. Pilot ?19/38 kHz L.P.F. Leakage ?is not used 12 Separation 98,0 MHz FM SSG 98.0 MHz 60409 Stereo (1.) ?1 kHz Main ?90% Filet ?10% Antenna Terminal Voltmeter Output (L/ Output 181 Output VS 203 Max. SePnratk1n ?19/38 kHz L.P.F. (balan

36、ce of ? is used di realvity/ 13 IF Narrow Distortion Adjustment 98.0 MHz FM SSG 98.0 MHz 60 dElp Stereo (LI ?1 kHz Main ?90% Pilot ?10% Antenna Terminal Distortion Meter Output (1.) Ti MM Distortion ?IF . narrow _ in AN dejrzLnGatin 980M FM SSG 98.0 MHz 1st Signal LED ON when wide 14 Stereo ILI ?1 k

37、Hz Main ?90% Pilot ?10% Antenna Terminal VA 1 Equalization of let signal LED ON level at narrowswitchi ?wng ? IF .I narrow time 16 0i5troFrtoartrrg4eck 98.0 MHz FM SSG 98.0 MHz 130 dBsi Stereo IL) Mono Antenna Terminal Distortion Meter Output IL/ If standard value Mono ?Under 0.7 Stereo Under 1% rec

38、pe n:tIttebm711Tanndd 1 4 AM 1 IF Adjustment No. sot ai nd 9. Frequency oi (wM. .1 , ,F No-IF Waveform Distortion Lev m o oom o rnm o 0 m 0 0 a 0 00 a 0 zz zz z z z Z zzzz z z mmm m m m m m rnm m rn.f.n cnc. entntnumn cn 68 Olcl 1133 23 AM 21 A 33 1111313131 .31 -052 0033 C034 -035 0037 C038 -039 C0

39、40 C043 C044 C045 C047 C048 0049 C050 C054 0056 C057 0059 C060 -061 C062 C201 C202 -203 C204 0305 C206 0207 0208 0209 C210 0211 -212 C215 C216 0217 -218 0219 -220 C221 0321 -222 0225 C01 0309 C310 0312 0213 0314 0315 0316 -317 C318 C320 0322 0223 _324 C325 0326 C330 C401 0402 0403 0404 C409 0407 C40

40、8 0410 C411 _413 0414 _415 0416 _417 0418 C419 -421 0423 C424 2531025002 2531024003 2544146004 2531024003 2544162017 2551082009 2544132005 2531024003 2544146004 2544145005 2544132005 2551064001 2544145005 2544145005 2544146004 2544140000 2531024003 2544164002 2544146004 2544132035 2551120025 2551122

41、008 2544148002 2551120042 2544148002 2544145005 2531024003 2544145005 2544163029 2544141009 2544140000 2544145005 2556160007 2551120084 2544132005 2531024003 2544140000 2531024003 2544146004 2544147003 2531024003 2551082009 2544136001 2531024003 2531024003 2531025002 2531024003 2544132005 2531024003

42、 2556160094 2541035011 2541029001 2549014005 2544136001 2544139008 2544140000 2544132005 2544161047 2531024003 2533133002 2544147003 2544146004 2544136001 2544159004 2544148002 -20 +8 0.022gF ?R% 50V CERAMIC -20 0.01gF ?_20% 50V CERAMIC 16E ?50V ELECTROLYTIC 93 0.01gE ?R% 50V CERAMIC -20 3305E ?*20%

43、 10V ELECTROLYTIC 0.068gF 010% 50V PLASTIC FILM 10AF ?16V ELECTROLYTIC 080 0.01pF ?_25% 50V CERAMIC 11.0F ?50V ELECTROLYTIC 0.47gF ?50V ELECTROLYTIC 10,0F ?16V ELECTROLYTIC 0.02240F 010% 50V PLASTIC FILM 0.47gE ?50V ELECTROLYTIC 0.47gF ?50V ELECTROLYTIC 1siF ?50V ELECTROLYTIC 4.7gF ?35V ELECTROLYTIC

44、 0.01gF ?.8R% 50V CERAMIC -20 4.7pF ?0-20% 25V ELECTROLYTIC 1gF ?50V ELECTROLYTIC 10gF ?16V ELECTROLYTIC 0.00150F 05% 50V PLASTIC FILM 0.0474F ?*5% 50V PLASTIC FILM 3.3gF ?50V ELECTROLYTIC 0.0022gF 05% 50V PLASTIC FILM 3.34F ?50V ELECTROLYTIC 0.47gF ?50V ELECTROLYTIC 0.01gF ?RA% 50V CERAMIC 047gF ?5

45、0V ELECTROLYTIC 470gF ?*20% 16V ELECTROLYTIC 105F ?35V ELECTROLYTIC 4.70F ?35V ELECTROLYTIC 0.47g F ?50V ELECTROLYTIC 1000PF ?*5% 50V PLASTIC FILM 0.0047gF =5% 50V PLASTIC FILM 10pF ?16V ELECTROLYTIC 0.015F ?% 50V CERAMIC -20 4.7gF ?35V ELECTROLYTIC 0.015F ? +80 1AF ? _20% 50V CERAMIC 50V ELECTROLYT

46、IC 2.2gF ?50V ELECTROLYTIC 0.015F ?+RR% 50V CERAMIC -20 0.068gF *10% 50V PLASTIC FILM 1005F ?16V ELECTROLYTIC +8 0.01gF ?R% 50V CERAMIC -20 0.01gF ?1% 50V CERAMIC 0.022pF ?4920% 50V CERAMIC : +80 0.01gF ?_25% 50V CERAMIC 10gF ?16V ELECTROLYTIC +8 0.01gF ?R% 50V CERAMIC -20 390PF ?05% 50V PLASTIC FIL

47、M 2.2gF ?020% 35V TANTALUM 10F ?*20% 35V TANTALUM 0.1gF ?*20% 50V ELECTROLYTIC 100gF ?16V ELECTROLYTIC 100gF ?25V ELECTROLYTIC 4.7gF ?35V ELECTROLYTIC 10gF ?16V ELECTROLYTIC 4700F ?6.3V ELECTROLYTIC +80 0.010.F ?_25% 50V CERAMIC 33PF ?05% 50V CERAMIC (TEMP.) 2.20 ?50V ELECTROLYTIC 1gF ?50V ELECTROLY

48、TIC 100gF ?16V ELECTROLYTIC 100/IF ?020% 35V ELECTROLYTIC 3.3s0F ?50V ELECTROLYTIC RESISTORS (not inc aded Carbon Film *5% )10% 50V TYPe) 100 AO; -1,8% ,8,Ve.041811.6pisFil.,A1TpC7 200 ohm 05% ?1W METAL OXIDE (NE)- SOLID VR ?470 ohm SOLID VR ?22 k ohrn SOLID VR ?4.7 k ohm SOLID VR ?2.2 k ohm SOLID VR ?100k ohm SOLID VR ?150 k ohm SOLID VR ?1 k ohm SOLID VS ?22k ohm PU