Kenwood-RV251-avr-sm 电路图维修手册.pdf

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1、AV SURROUND RECEIVER R-V251 SERVICE MANUAL 1999-8/B51-5562-00 (K/K) 1792 70% Caution : No connection of ground line if disassemble the unit. Please connect the ground line on rear panel, PCBs, Chassis and some others. * Refer to parts list on page 25 ON/STANDBY PHONES INPUTTAPE 2 (MONITOR) TA/NEWS /

2、INFO.DISP.AUTO A.MEMO BANDPTY CLOCKMODE TIMER SET TUNING MODEMULTI CONTROL LEVEL VOLUME CONTROL DOWNUP AV SURROUND RECEIVER R-V251 R D S EON SYSTEM CONTROLFRONTSURROUNDCENTER SUB WOOFER SUB WOOFER PRE OUT REARFRONTCENTER SPEAKERS ( 6-16 ) UNSWITCHED TOTAL 150W MAX. AC 230V 50Hz ANTENNA AM FM 75 GND

3、TAPE 2 (MONITOR)TAPE1 / MDCDAUX IN REC VCR PLAY RECPLAYRECPLAY R L L AUDIO VIDEO VCR REC OUT MONITOR OUT DVD VCR PLAY IN LRRLC 13 10 151719 12 11 2IN4 957 57 DVD 6CH./2CH.INPUT R161820 22 43 3133393735 3432363840 Panel dressing (A21-3777-03) Window (B10-2367-02) Panel * (A60-) Knob (k29-6727-04) But

4、ton(R) * (K29-) Button(L) (K29-6816-02) Phono jack(4P) (E63-0186-08) Phono jack(6P)x2 (E63-0187-08) Lock terminal board (E70-0120-08) Phono jack (E63-1137-08) Phono jack(6P) (E63-1136-08) AC outlet * (E03-) Lock terminal board (E70-0119-08) Power cord bushing (J42-0346-08) Metallic cabinet (A01-3750

5、-08) Lock terminal board (E21-0034-08) Phono jack(4P) (E63-1152-08) Phone jack (E11-0188-05) AC power cord * (E30-) RadioFans.CN 收音机爱好者资料库 R-V251 2 CONTENTS / ACCESSORIES / CAUTIONS Contents CONTENTS / ACCESSORIES / CAUTIONS. 2 BLOCK DIAGRAM .3 CIRCUIT DESCRIPTION.4 ADJUSTMENT.8 PC BOARD . 9 SCHEMA

6、TIC DIAGRAM . 13 EXPLODED VIEW .24 PARTS LIST.25 SPECIFICATIONS .31 FM indoor antenna (1) (T90-0830-08) AM loop antenna (1) (T90-0804-08) Remote control unit (1) (A70-1306-05): RC-S0506.TE (A70-1305-05): RC-S0505.XBattery cover (A09-0378-08) Loop antenna stand (1) Batteries(R6/AA) REMOTE CONTROL UNI

7、T RC-S0506 A B +10 54321 09876 6 7 8 8 % fi ? ? ? 4 4 ?1 ?3 3 7 7 ? 2 2 1 ALL INFO.TEXT DISP. TITLE SEARCH MEMO TUNER BAND e STILL STEP E A.MONI.AUTO MEMORY RDS DISPLAY PTY SEARCHDISPLAYSLEEP NEXTPREV. POWER TIMECLEARP.MODECHECK STEREO MUTE SOURCE DIRECTDSP LEVELVOLUME PRO LOGIC 3 STEREO MULTI CONTR

8、OL TEST TONE MODE INPUT TAPE 2 (MONITOR) FREEZEPAL/NTSCRETURN TAPE MD/LO SELECT P.B.C. REC/ARMO.T.E. LD AUTO DIGITAL CD/VIDEO CD/LD REPEAT FRAME/ TIME PTYTA/NEWS/INFO. DISC SKIPEDIT MODE ALL TEXT SEARCHP.CALL fi ?% How to reset the microcomputer The microcomputer may malfunction (impossibility of op

9、eration, erroneous display, etc.) when the power cord is unplugged and plugged in again while the unit is in ON mode with the key pressed or due to other external causes. In this case, execute the procedure on the right to reset the microcomputer and return the unit to the normal condition. Unplug t

10、he power cord from the wall outlet. While holding the (ON/STANDBY) key depressed, plug the power cord into the wall outlet again. Resetting the microcomputer clears the memory you entered and returns it to the initial condition when the unit left the factory. Accessories Cautions RadioFans.CN 收音机爱好

11、者资料库 FL DISPLAY TUNER UNIT K01 POWER AMP K02 K03 K02 BD101 7815 +VH(AMP) -30V AVR KEY MATRIX STK411-210E IC103 STK410-010E IC104 Q119-124Q113-118 NJM2068D IC113 HEADPHONES L R L R SPEAKER C SL SR SW-PRE OUT M62446FP IC107 ELECTRIC TONE /VOLUME BD102 IC101 7915 IC102 Q101 -VH(AMP) +VL(AMP) -VL(AMP) F

12、1 FILAMENT AC FL DISPLAY +5V(u-COM) +10V(PRO LOGIC) +5V(VIDEO SEL) +7V(E.VOL) +15V -15V -5V(VIDEO SEL) -7V(E.VOL) F2 IC106(2/2) TC9163AN IC111 NJM2068D IC112 NJM2068D IC105 CDX271AQ IC110 NJM2068D IC702(2/2) NJM2068D IC603 -6ab ATT IC702(1/2) LC7821 IC601 LC7821 IC106(1/2) DOLBY PROLOGIC IC108 NJM22

13、79 SELECTOR VIDEO TUNER CD AUX MD PLAY PLAY TAPE/MONITOR VIDEO PLAY TAPE/MONITOR REC MD REC VIDEO REC VIDEO PLAY VIDEO REC DVD/GCH INPUT MONITOR OUT L R C SL SR SW DVD GCH INPUT IC701 u-COM FLT701 + + + + + + + MUTE L R C SL SR SW C R L SW SR SL -10ab ATT -B LOW TAP -B HI TAP +B LOW TAP +B HI TAP L

14、R C S L RR GRID REMOCON IN ROTARY ENCODER RELAY VIDEO1,VIDEO2,VMUTE E.VOL (DATA,CLK,STB) 10ab ATT MUTE TUNER RESET P/L (DATA,CLK,STB) SYNCHRD RDS PROTECTION SEGMENT KEY SCAN KEY RETURN R-V251 R-V251 3 BLOCK DIAGRAM RadioFans.CN 收音机爱好者资料库 R-V251 4 CIRCUIT DESCRIPTION Active Pin. No.Pin NameI/ODescri

15、ption HL 1,2G1,G2OFL grid control. 3PULL UP-Connected to VCC(+5.0V). 4POWER DOWNIAC selector. 5VOL. UPIVolume encoder A(CW) signal. 6RDS CLKIRDS IC(IC703) clock input control. 7VOL. DOWNIVolume encoder B(CCW) signal. 8RMCIRemote control signal input. 9RDS DATAIRDS IC(IC703) data input control. 10,11

16、NC-Unused. 12PROTECTIONIDetection input port of protection.ON 13STEREOIDetection input port of stereo signal for TUNER.STEREO 14PLL CEOPLL IC(IC402) CE signal output. 15RCVR CLKOSEL. IC(IC601,602,106) clock signal output. 16RCVR DATAOSEL. IC(IC601,602,106) data signal output. 1719KEY31IKey return 31

17、. 20S. DATAI/OSerial communication data. 21S. BUSYI/OSerial communication busy. 22E.VOL CKOE.volume IC(IC107) clock control.ACTIVE 23E.VOL DTOE.volume IC(IC107) data control. 24E.VOL STOE.volume IC(IC107) strobe control.ACTIVE 25PLL DOIPLL IC(IC402) DO signal. 26RCV CEIReceiver chip enable signal.EN

18、ABLE 27DSP CEODSP IC(IC105) XLAT. 28AVREF-Analog power supply(+5.0V). 29H/P DETECTIDetection input port of headphones jack. 30SDIDetection input port of SD signal for TUNER.TUNED 31S. LEVELIA/D input port of signal level. 32DSP READYODSP IC(IC105) ready. 33DSP DATAODSP IC(IC105) data. 34DSP CLKODSP

19、IC(IC105) clock. 35OPTIDiscrimination port of model.E,TX 36CH.SPACE-Unused. 37AVSS-Analog ground. 38RESETIu-COM reset. 39EXTALIMain clock(10MHz). 40XTAL-Main clock(10MHz). 41VSS-u-COM ground. 42TX-Sub clock(32.768kHz). 43TEXISub clock(32.768kHz). 44VDD-Power supply(+5.0V). 45VFDP-FL power supply(-33

20、V). 46T. MUTEOMuting control of TUNER.ON 47MAIN MUTEOMuting control of main output.ON 48H/P MUTEOMuting control of headphones.ON 49VCR MUTEOVIDEO IC(IC108) control.ON 50DSP RESETODSP IC(IC105) reset. 51RCV. CEIReceiver chip enable signal. 52-Unused. 53F. RLYOFront speaker relay control.ON 54S. RLYOS

21、urround speaker relay control.ON 55C. RLYOCenter speaker relay control.ON 1. Microprocessor : (FRONT PCB,IC701) 1-1. Pin description Pin No.NameI/ODescription 13T.POTest monitor. Normally outputs Low.(Unused.) 4VSSO-Digital GND. 58T.POTest monitor. Normally outputs Low.(Unused.) 9TSTOIDigital GND. 1

22、0VDDO-Digital power supply. 11VSS1-Digital GND. 1215TST14IDigital GND. 16XRSTISystem reset input. Reset when Low. 17BFOTOUnused. 18CSL1IDigital power supply. 19CSL2IDigital GND. 20VSS2-Digital GND. 21AVS3-L-ch DA converter GND. 22AVD3-L-ch DA converter power supply. 23LOUTOL-ch DA converter output.

23、24AVD1-L-ch AD converter power supply. 25AVS1-L-ch AD converter GND. 26L01OL-ch AD converter LPF operational amplifier inverted output. 27LINIL-ch AD converter analog input. 28AVD5-C-ch DA converter power supply. 29AVS5-C-ch DA converter GND. 30XCOUTOC-ch DA converter output. 31AVDX-Analog power sup

24、ply for master clock. 32XTLOOCrystal oscillator circuit output. 33XTL1ICrystal oscillator circuit input. 34AVSX-Analog GND for master clock. 35XSOUTOS-ch DA converter output. 36AVS6-S-ch DA converter GND. 37AVD6-S-ch DA converter power supply. 38RINIR-ch AD converter analog input. 39LO2OR-ch AD conv

25、erter LPF operational amplifier inverted output. 40AVS2-R-ch AD converter GND. R-V251 5 CIRCUIT DESCRIPTION Active Pin. No.Pin NameI/ODescription HL 56POWER RLYOPower relay control.ON 5710dB. ATTOVolume 10dB attenuator control.ON 58ST. LEDOSTANDBY LED control(RED).ON 59ST. LEDOSTANDBY LED control(GR

26、EEN).ON 6069-Unused. 70779S16SOFL segment(916) and key scan(18) control. 78851S8SOFL segment(18) control. 8688-Unused. 89VDD-u-COM power supply(+5.0V). 90,91-Unused. 92100G11G03OFL grid control. 2. Key matrix 3. Pin description of dolby prologic IC(MAIN PCB IC105) KS1(77pin)KS2(76pin)KS3(75pin)KS4(7

27、4pin)KS5(73pin)KS6(72pin)KS7(71pin)KS8(70pin) K1(19pin)MODETUNING -PTYAUTO TIMERTIMER TIMER K2(18pin)MULTI TUNING CLOCK-MODESETTAMEMO K3(17pin)MULTI -INPUT ON/STBYINPUT TAPE2DISPBAND R-V251 6 CIRCUIT DESCRIPTION Pin No.NameI/ODescription 41AVD2-R-ch AD converter power supply. 42ROUTOR-ch DA converte

28、r output. 43AVD4-R-ch DA converter power supply. 44AVS4-R-ch DA converter GND. 45VSS3-Digital GND. 46SCKIShift clock input for microcomputer interface. 47REDYOTransfer enabling signal output for microcomputer interface. Transfer prohibited when Low. 48T.POUnused. 49XLATILatch input for microcomputer

29、 interface. 50RVDTIData input for microcomputer interface. 51XS24ISerial data 24-/32bit slot selection. 24-bit slot when Low.(valid for slave mode) 52VDD1-Digital power supply. 53VSS4-Digital GND. 54T.POUnused. 55SIIGND. 56T.PIGND. 57BCKI/OUnused. 58LRCKI/OUnused. 59VSS5-Digital GND. 60XMSTIDigital

30、GND. 6163T.POUnused. 64VSS6-Digital GND. 6572T.POUnused. 73VDD2-Digital power supply. 74VSS7-Digital GND. 7580T.POUnused. IC CHANNELLchRchLchRchLchRchLchRchLchRchLchRchLchRchLchRch IC PORT22732642562372282110191118 SURROUND-prologicstereo6ch inputprologicprologic6ch inputprologic SPEAKERFLch FRch FL

31、ch FRchFLchFRchSLch SRch SLch SRch SLch SRchCchSWch CchSWch DOLBY PROLOGIC-XXXX DOLBY 3STEREO-XXXXX DSP LOGIC-XXXXX STEREO-XXXXXX SOURCE DIRECT-XXXXXXX 6ch INPUT(6ch)-XXXXX 6ch INPUT(2ch)-XXXXXXX IC CHANNELRchchRchchRchchRchchRchchRchchRchchRchch IC PORT1302293284276257249221021 INPUT SELECTOR-VCR R

32、EC TAPE1/MD REC-MONITOR TAPE2 PLAY-ATT CD-X- AUX-X- VCR-X-X- TAPE1/MD-X-X- MONITOR ON-X-X TUNER-X- DVD/6ch INPUT-X- 7 CIRCUIT DESCRIPTION R-V251 4. Function table 4-1. Mode selector: KIC9163AN(IC106) 4-2. MODE/ATT selector IC: LC7821(IC602) 5. Test mode Setting : While pressing the INPUT key,plug th

33、e AC power cord into the AC wall outlet. All the fluorescent display indicates. (The all-illuminated state is cleared by pressing any main unit keys.) Cancelling: Plug the AC power cord out from the AC wall outlet. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

34、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

35、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? (B) FM-SG FM-SG AM-SG MPX AG AG AG (A) (D) (C) AC voltmeter Osc

36、illoscope Distortion meter Dummy antenna INPUT PCB IC601 PIN 30 (Lch) PIN 1 (Rch) 8 ADJUSTMENT R-V251 No. 1 ITEM DISCRIMINATOR INPUT SETTING (A) CARRIER FREQ. : 98.0MHz MOD FREQ.: 1kHz DEVIATION: 75kHz SELECTOR: MONO ANT INPUT LEVEL: 60dBu OUTPUT SETTING Connect a DC voltmeter to TP401 TUNER SETTING

37、 MONO 98.0MHz ALIGNMENT POINTS T402 ALIGN FOR 0V50mV FIG. 3 TUNED LEVEL (A) CARRIER FREQ. : 98.0MHz MOD FREQ.: 1kHz DEVIATION: 75kHz SELECTOR: MONO ANT INPUT LEVEL: 30dBu5dB - MONO 98.0MHz VR401 Adjust VR401 and stop at the point where (TUNED) goes ON. 2 DISTORTION (STEREO) (A) CARRIER FREQ. : 98MHz

38、 MOD FREQ.: 1kHz DEVIATION: 67.5kHz PILOT: 7.5kHz SELECTOR: L or R ANT INPUT LEVEL: 60dBu (B) AUTO 98.0MHz T403 Minimum distortion. FM SECTIONBAND : FM Tuner adjustment AM SECTIONBAND : AM 1 TUNED LEVEL (D) CARRIER FREQ. : 999kHz MOD FREQ.: 1kHz 30%DEV SELECTOR: MONO ANT INPUT LEVEL: 30dBu5dB - 999k

39、HzVR402 Adjust VR402 and stop at the point where (TUNED) goes ON. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?