Denon-DRA295-rec-sm维修电路原理图.pdf

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1、Hi-Fi AM-FM Stereo Receiver SERVICE MANUAL MODELDRA-295 AM-FM STEREO RECEIVER SAFETY PRECAUTIONS. 36 SPECIFICATIONS . 36 DISASSEMBLY . 37 ADJUSTMENT. 38,39 BLOCK DIAGRAM . 40 LEVEL DIAGRAM . 41 SEMICONDUCTORS .4246 PRINTED WIRING BOARDS .4751 NOTE FOR PARTS LIST. 52 PARTS LIST OF P.W.B. UNIT ASSY .5

2、359 EXPLODED VIEW . 60 PARTS LIST OF EXPLODED VIEW . 61,62 PACKING VIEW . 63 TABLE OF CONTENTS ?Some illustrations using in this service manual are slightly different from the actual set. PARTS LIST OF PACKING & ACCESSORIES . 63 WIRING DIAGRAM. 64 SCHEMATIC DIAGRAMS .6569 (1/5)INPUT UNIT . 65 VIDEO

3、UNIT . 65 (2/5)VOLUME UNIT . 66 CONNECTOR UNIT . 66 (3/5)MAIN UNIT . 67 (4/5)FRONT UNIT. 68 SWITCH UNIT . 68 POWER SW/HP UNIT. 68 (5/5)TUNER UNIT. 69 For U.S.A., Canada & Europe model 14-14, AKASAKA 4-CHOME, MINATO-KU, TOKYO 107-8011 JAPAN Telephone: 03 (3584) 8111 X0118 842 NC 0108 RadioFans.CN 收音机

4、爱 好者资料库 36 DRA-295 SPECIFICATIONS ? ? ? ? ? Audio Section (Power Amplifier) Rated output:50W + 50W (8/ohms, 20Hz 20kHz with 0.08% T.H.D.) Output terminals:A or B4 to 16/ohms A + B8 to 16/ohms (Analog) LINE input - PRE OUT Input sensitivity/input impedance:200mV/47k/kohms Frequency response:10Hz 50kH

5、z: 1.5dB S/N ratio:98 dB (IHF-A weighted) Total harmonic distortion:0.009% (3dB at rated output, 8/ohms) (1kHz) Rated output:1.2V ? ? ? ? ? Video Section (U.S.A. & Canada model) (Standard Video Jacks) Input/output level and impedance:1V p-p, 75/ohms Frequency response:5Hz 10MHz +1, 3dB ? ? ? ? ? Tun

6、er Section FM (note: V at 75/ohms, 0dBf = 110-15W)AM Receiving range: U.S.A. & Canada model87.50MHz 107.90MHz520kHz 1710kHz Europe model87.50MHz 108.00MHz522kHz 1611kHz Usable sensitivity:1.4V (14.2dBf)18V 50dB quieting sensitivity:MONO2.8V (20.2dBf) STEREO23V (38.5dBf) S/N ratio:MONO80dB (IHF-A wei

7、ghted) STEREO75dB (IHF-A weighted) Total harmonic distortion:MONO0.15% (1kHz) STEREO0.3% (1kHz) ? ? ? ? ? General Power supply:AC120V, 60Hz (For U.S.A. & Canada model) AC230V, 50Hz (For Europe model) Power consumption:3.0A (For U.S.A. & Canada model) 150W (For Europe model) Maximum external dimensio

8、ns:434 (W) 147 (H) 417 (D) mm (17-3/32 5-25/32 16-27/64) Weight:9.2kg (20lbs 4.5oz) ? ? ? ? ? Remote Control Unit RC-895 (For U.S.A. & Canada model) RC-907 (For Europe model) Batteries:R06P/AA Type (two batteries) External dimensions:50 (W) 179 (H) 22 (D) mm (1-31/32 7-3/64 55/64) Weight:125g (Appro

9、x. 7.5 oz) (including batteries) * For purposes of improvement, specifications and design are subject to change without notice. SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Before returning the u

10、nit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the unit is defective. RadioFans.CN 收音机爱 好者资料

11、库 37 DRA-295 Europe model 1. Remove cord bushing 5 from the Rear Panel. 2. Remove 17 screws 6. 3. Detach the Rear Panel in the arrow direction. DISASSEMBLY (Follow the procedure below in reverse order when reassembling) Front Panel 1. Remove 4 screws 3 and 2 screws 4. 2. Detach the Front Panel in th

12、e arrow direction. Rear Panel U.S.A. & Canada model 1. Remove cord bushing 5 from the Rear Panel. 2. Remove 23 screws 6. 3. Detach the Rear Panel in the arrow direction. Top Cover 2 1 1 3 4 Front Panel 5 6 6 6 6 6 Rear Panel 5 6 Rear Panel Top Cover Remove 6 screws 1 and 3 screws 2, detach the Top C

13、over in the arrow direction. 38 DRA-295 FM ALIGNMENT InputOutputAdjustment Step Alignment Item Tuning Frequency Setting TypeFrequency Input Level ModulationCouplingTypeConnect toPointsAdjust to 1 Center Adjustment 98.1MHz (98.0MHz) FM SSG98.1MHz60dB Mono 1kHz 100% Antenna Terminal Digital Voltmeter

14、R471T402 50mV 2Distortion 98.1MHz (98.0MHz) FM SSG98.1MHz60dB Mono 1kHz 100% Antenna Terminal Distortion Meter Output Terminal (L) T403 Minimum Distortion 3Repeat Steps 1 and 2 4Signal Level 98.1MHz (98.0MHz) FM SSG98.1MHz20dBOFF Antenna Terminal Light “TUNED” on FL Display VR402 ADJUSTMENT Tuner Se

15、ction CONNECTION DIAGRAM OF MEASURING INSTRUMENTS ? FM STEREO MODULATOR FM SSG Digital Voltmeter 75ohm T402T403 IC402 VR402 TUNER BD R471 20+14 10dB ? AM T402T403 IC402 TUNER BD R471 VR401 AM ALIGNMENT OutputAdjustment Step Alignment Item FrequencyInput TypeConnect toPointsAdjust to Remarks 1Signal

16、Level 999 (1000) kHz AM SSGVR401 Light “TUNED” on FL Display SSG OUTPUT 74dB (EMF) 39 DRA-295 Audio Section Idling Current Required measurement equipment : DC Voltmeter Preparation (1)Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room tempereture 15 C 30

17、 C (59 F 86 F). (2)Presetting G POWER (Power sourse switch)OFF G SPEAKER (Speaker terminal)No load (Do not connect speaker, dummy resistor, etc.) Adjustment (1)Remove top cover and set VR101, VR102 on Amp. Unit at full counterclockwise ( ) position. (2)Connect DC Voltmeter to test points (Lch: TP101

18、, Rch: TP102). (3)Connect power cord to AC Line, and turn power switch ON. (4)Presetting.MASTER VOLUME : - counterclockwise ( min.) FUNCTION: CD (5)Within 2 minutes after the power on, turn VR101 clockwise ( ) to adjust the TEST POINT voltage to 1.5 mV 0.5 mV DC. (6)After 10 minutes from the preset

19、above, turn VR101 to set the voltage to 2.5 mV 0.5 mV DC. (7)Adjust the Variable Resistors of other channels in the same way. VR101 TP101 VR102 TP102 Lch Rch 87654321 A B C D E DRA-295 40 BLOCK DIAGRAM 1 2 34 8 INPUT BUFFER AMP 1 1 CD 1 1 1 MAIN VOLPOWER AMP MUTE ATT 1 1 MAIN CD IN SUB ROOM (200mV)

20、(200mV) - 18dB - 35.5dB VOL 00 +15.5dB 26dB +16.2dB SPK OUT 2.83V (1W/8ohms) H/P OUT 47mV (1W/8ohms) SUB ROOM OUT 1.2V SPK OUT H/P OUT SUB OUT 87654321 A B C D E DRA-295 41 LEVEL DIAGRAM 130 31 50 5180 81 100 CXP82840-321Q Terminal Function SEMICONDUCTORS ? ? ? ? ? ICs CXP82840-321Q (IC900) 1G2/A1OF

21、L G02 2G1/A0OFL G01 3NC(Vdd)INC(Connect to Vdd) 4POWER DOWNIAC OFF Detect 5ENC VOLUME UPIEncoder VOLUME UP 6RDS CLOCKIRDS clock input(TDA7330) 7ENC VOLUME DOWNIEncoder VOLUME DOWN 8REMOCONIRemote signal input. 9PROTECTIONIProtection detecting input. 10SUB ZONE2 LEDONot used. 11SUB ZONE1 LEDONot used

22、. 1262446 LATCHOElectronic volume control.(M62446 LATCH) 13FUNCTION SW 1 CEOFunction IC control.(TC9273 ST) 14FUNCTION 1/2 DATAOFunction IC control.(TC9273 DATA) 15FUNCTION 1/2 CLOCKOFunction IC control.(TC9273 CLOCK) 16VOLUME,PLL,4094,DATAOLC72131,M62446,TC4094(DATA) 17VOLUME,PLL,4094,CLOCKOLC72131

23、,M62446,TC4094(CLOCK) 18TUNEDITUNED signal in. 19STEREOISTEREO signal in. 20IF COUNTIPLL data in.(LC72131) 21TUNER MUTEOTuner mute output. 22PLL CEOLC72131(CE) 234094 STBOTC4094(STB) 24VOLUME STBONot used. 25SUB 1 MUTEONot used. 26MAIN MUTEOMAIN,Subwoofer mute output. 27POWER RELAYOPower supply rela

24、ycontrol. 28AV REF.IReference voltage input for A/D converter. 291511 DATAONot used. 30RDS DATAIRDS data input(TDA7330) 31KEY IN 1IKey input 1 32KEY IN 2IKey input 2 33KEY IN 3IKey input 3 34STEP OPTIONIArea select. 35SET OPTIONIModel select. 36SPEAKER A LED 1OSPEAKER A LED indicator control 37A VSS

25、IA/D converter GND. 38RESETILow-level active,system reset. 39EXTALIEXTAL(10MHz) 40XTALOXTAL(10MHz) 41VSSIGND 42NC(TX)ONot used. 43G(TEX)IGND 44VDDIVcc SUPPLY. 45VFDPIFDP voltage supply. Pin No. Pin NameFunctionI/O Pin No. Pin NameFunctionI/O 46SPEAKER B LED 2OSPEAKER B LED indicator control 47STBY L

26、ED 3OSTANDBY LED indicator control 48PD2/A53OFL P38 49PD3/A52OFL P37 50PD4/A51OFL P36 51PD5/A50OFL P01 52PD6/A49OFL P02 53PD7/A48OFL P03 54PF0/A47OFL P04 55PF1/A46OFL P05 56PF2/A45OFL P06 57PF3/A44OFL P07 58PF4/A43OFL P08 59PF5/A42OFL P09 60PF6/A41OFL P10 61PF7/A40OFL P11 62PG0/A39OFL P12 63PG1/A38O

27、FL P13 64PG2/A37OFL P14 65PG3/A36OFL P15 66PG4/A35OFL P16 67PG5/A34OFL P17 68PG6/A33OFL P18 69PG7/A32OFL P19 70PH0/A31OFL P20 71PH1/A30OFL P21 72PH2/A29OFL P22 73PH3/A28OFL P23 74PH4/A27OFL P24 75PH5/A26OFL P25 76PH6/A25OFL P26 77PH7/A24OFL P27 78A23OFL P28 79A22OFL P29 80A21OFL P30 81A20OFL P31 82A

28、19OFL P32 83A18OFL P33 84A17OFL P34 85A16OFL P35 86G16OFL G16 87G15OFL G15 88G14OFL G14 89VddIVcc SUPPLY. 90G13OFL G13 91G12OFL G12 92G11OFL G11 93G10OFL G10 94G9OFL G09 95G8OFL G08 96G7OFL G07 97G6OFL G06 98G5OFL G05 99G4OFL G04 100G3OFL G03 8 DRA-295 42 1_CXP82840.p6501/08/18, 10:43Page 42-43Adobe

29、 PageMaker 6.5J/Win 43 DRA-295 LA1266 (IC402) 10 4 13 8 19 15 17 18 14 21 22 GND Vcc 511 IF BUFFER IF BUFFER 2 FM - IF 6 Q.D. 7 REG 23 OSC OSC BUFFER 24 NARROW S-METER S-METER 16 LED DRIVER RFMIX 12 20 AM-IFDET AGC POST AMP 9 13 AM-IFFM-IFFM-IN AM-IN 201918171615141312 987561 21 LA3401 (IC403) 22 VO

30、L REG OSC SYMMETRICAL REOCTANCE CIRCUIT PHASE COMPARATOR VCO STOP PILOT DET FFFF FF 38kHz FF 38kHz 90 FF 19kHz 90 MUTING FM AM CHANGE Ro Rc Rc Rb 234 DECODER MUTING CONTROL FM AM CHANGE OVER Vcc ON MUTING MUTING OUTPUT STEREO SWITCH TRIGGER LAMP DRIVER Rb 1011 LC72131M (IC401) 120 219 318 417 5 16 6

31、15 714 813 912 1011 XIN CE DI CL DO BO1 BO2 BO3 BO4 IO1 AOUT AIN PD VDD FMIN AMIN IO2 IFIN Vss XOUT 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 A OUTPUT A INPUT A+INPUT V B OUTPUT V B INPUT B +INPUT 1 2 3 45 7 8 6 S2 S3 S4 S5 S6 S7 S8 S9 S10 S1 VDD STB DATA S2 S3 S4 S5 S6 S7 S8 S9

32、 S10 GND CK Vss S1 13 14 1 3 4 5 6 7 8 9 10 11 12 2 15 16 28 27 26 25 24 23 22 21 20 19 18 17 1 13 28 212 1227 14 15 16 Vss GND VDD S1S10 CK DATA STB GND=0V Vss=-8.0-17V GND=0V VIDEO OUT VIN1 A 1234567 6dB amp 8 Vcc 9 video switch (4 inout 1 output) controldriver B GND VIN2 VIN3 VIN4 TC9273N-007 (IC

33、300) NJM2068DD (IC301,602)LA7952 (IC500) (U.S.A./Canada model) Border Input Pin No SymbolNameFunction Dual Power Use:VDD = 8.017 VSingle Power Use:VDD = 8.018V+Power Terminal Digital Ground +Power Terminal I/O Terminal Clock Input Low level Terminal Clock input for data transfer. Serial input for sw

34、itch setting. Strobe InputStrobe input for data writing.Strobe Input Data Input Input terminal of analog switch. TC9273N Terminal Function 44 DRA-295 ABLC GND Vcc 16 1 15 2 14 3 13 4 12 5 11 6 10 7 9 8 STR D CP QP0 QP1 QP4 QP5 QP6 QP7 QS2 QS1 QP3 QP2 GND OE 42 41 40 39 38 37 36 35 34 33 32 31 30 29

35、28 27 26 25 24 23 22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 OUT4 OUT3 OUT2 OUT1 AVDD DVDD SWOUT SROUT SLOUT COUT ROUT LOUT AVSS SWin GNDS SRin SLin GNDC Cin DNDR Rin GNDL Lin BYPASSR BLPASSL LTRE LBASS3 LBASS2 LBASS1 CLK DATA LATCH DGND AGND CL1 CL2 CR1 CR2 RTRE RBASS3 RBASS2 RBASS1 t

36、onetone OUTPUT PORT MCU I/F VCC VOUT B.P.F PD volume volume volume volume volume volume M62446FP (IC601) PC74HC4094 (IC600) ? ICP-N15 (IC105) ? P43T7D330BW16 NJL64H380A (RMC900) IC PROTECTOR IR SENSOR ? POSISTOR Detector FRONT VIEW FRONT VIEW Vout GND Vcc FRONT VIEW CXA1511M(IC501) (U.S.A./Canada mo

37、del) 8 1 7 2 6 3 5 4 IN C1 C2 GND NC fo OUT VCC TDA7330B (IC901) (Europe model only) 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 MUXIN VREF COMP FILOUT GND T1 T3 T4 OSCOUT OSCIN POR TM FSEL T2 VCC ARI QUAL RDDA RDCL T57 NJM7805FA (IC104) NJM7812FA (IC502) (U.S.A./Canada model) KIA7815AP (IC10

38、1) NJM7915FA (IC102) Input GND Output FRONT VIEW GND Input Output FRONT VIEW 87564 32 1 ABLC + IN C1 C2 GNDfoNC OUTVcc Head Amp Limiter Amp BPF BEF Detector & Comparator Integrator Hysteresis Comparator 22kohm ComparatorLimiterAmpHead Amp 45 DRA-295 2SD947F KTA1266Y KSA992F KSC1845F KTC3200BL KTC319

39、8Y KTA1268BL KSA916Y 2SC1740S KTC2874B KTC3880S DTA114EK DTA114YK DTC114YK TOP VIEW E B C TOP VIEW E B C FRONT VIEW BCE TOP VIEW KDS160MTZJ3.3B MTZJ5.1B MTZJ5.6B MTZJ6.2B MTZJ6.8B MTZJ7.5A MTZJ7.5B MTZJ18B MTZJ20B 1N4007 1SS133 B C E R1 R2 B C E R1 R2 2SB1559 2SD2389 FRONT VIEW ECB DTA114ES DTA144ES

40、 DTC114ES DTC114YS DTC144ES FRONT VIEW BCE DTA seriesDTC series DTA114EK DTA114YK R1 10kohm R2 10kohm 10kohm 47kohm DTA114ES10kohm 10kohm DTA114ES47kohm47kohm DTC114YK R1R2 10kohm 47kohm DTC144ES47kohm 47kohm DTC114YS10kohm 47kohm DTC114ES10kohm 10kohm TOP VIEW HL-50RDRF4 KBPC604 ? DIODES (LED Inclu

41、ded) ? TRANSISTORS 46 DRA-295 FL DISPLAY 16-st-42GNK (FL900) S38 S14 S9S1 S2 S3 S4 S5 S12 S13 S7S15 S6 S10 S11 G1 G1G2G3G4G5G6G7G16G15G13G12G10G9 F2F1 158 G14G11G8 G2G16 12345678910111213141516171819 232425262728293031323334 F1F1S1S2S3S4S5S6S7S8S9S10 S11 S12 S13 S14 S15 S16 S17 20 2122353637383940 4

42、142434445464748495051525354555657 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36S37 S38 G16 G15 G14 G13 G12 G11 G10G9G8G7G6G5G4G3G2G1F2F2 58 F1,F2 : Filament G1G16 : Grid S1S38 : Anode S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 G1G2G3G4G5G6G7G8G9G10G11G12G13G14G15G1

43、6 S38 S36 S37 S38 ? 2 DBS TV ? 1 VDP TAPE /(DVD) /(MD) AUXDVD MDV.AUX TUNER ? 2 ? 3 CD ? 1 PHONO VCR REC MULTI STEREO AUTO TUNED RDS CH S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S1 S2 S3 S4 S5 S6 S7 S9 S10 S11 S12 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S1

44、3 S14 S15 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 G2G16G1G2G16G1G2G16G1G2G16G1 DIGITAL PRO LOGIC S1 S6 S11 S16 S21 S26 S31 S2 S7 S12 S17 S22 S27 S32 S3 S8 S13 S18 S23 S28 S33 S4 S9 S14 S19 S24 S29 S34 S5 S10 S15 S20 S25 S30 S35 TUNED RDS STEREO AUTO RE

45、C MULTI PHONO VCR CD ? 1 TUNER ? 2 ? 3V.AUX AUX MD DVD / /TAPE VDPTV ? 1 ? 2 /DBS PRO LOGIC DIGITAL DIGITAL ANALOG TUNED RDS STEREO AUTO REC MULTI PHONO VCR CD ? 1 TUNER ? 2 ? 3V.AUX AUX MD DVD/ /TAPE VDPTV ? 1? 2 / DBS CH CH PRO LOGIC DIGITAL DIGITAL ANALOG Pin Assignment Anode & Grid Assignment PIN NO. CONNECTION PIN NO. CONNECTION PIN NO. CONNECTION 113 1 11 1 10 1313 13 13 87654321 A B C D E DRA-295 47 MAIN P .W.B. UNIT Assy COMPONENT SIDE PRINTED WIRING BOARDS 17 113 1 13 7 110 123 222 1 2 22 23 1 10 1 11 87654321 A B C D E DRA-295 48 VOLUME P .W.B. UNIT Assy COMPONENT SIDE 1