Kenwood-KRFV7771D-avr-sm1 电路图 维修手册.pdf

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1、SYSTEM CONTROL FRONT SPEAKERS (6-16 ) CENTER SPEAKER (6-16 ) SURROUND SPEAKERS DIGITAL IN CD1 COAXIAL VIDEO 4 COAXIAL VIDEO 3 OPTICAL VIDEO 2 OPTICAL SL 16XS 8 ( SL 16 ) ( XS 8 ) (6-16 ) OPTICAL DIGITAL OUT SWITCHED LR A LRL C R B SL 16 TEXT IR RECEIVER IN RELAY CONTROL IR OUT LCD REMOTE IR REPEATER

2、 OUT TV ON/OFF SENSOR LRR R L R ANTENNA AM -FM 75 GND CD1 PHONO MD/ TAPE 1 REC OUT PLAY IN REC OUT PLAY IN PLAY IN PLAY IN CD2 / TAPE 2 MONITOR MONITOR OUT SURROUND CENTER SUB WOOFER L LR VIDEOS VIDEO VIDEO SECOND ROOM PRE OUT PRE OUT AUDIO VIDEO 3 VIDEO 4 PLAY IN VIDEO 2 VIDEO 1 LRAUDIO PLAY IN REC

3、 OUT + - AUDIO PHONES INPUT SELECTORVOLUME DTSDOLBY DIGITALCLIP INDICATOR POWER ON/STANDBY A B SPEAKERS MUTE DOWNUP DISPLAY MODE S VIDEOVL - AUDIO - R CD2 / TAPE2 MONITOR ON OFF AV AUX AUDIO VIDEO SURROUND RECEIVER KRF-V7771D/VR-2080 KRF-V8881D/VR-2090 SERVICE MANUAL 1998-5/B51-5426-00 (K/K) 1796 In

4、dicator (B12-0326-04) Indicator (B12-0333-04) Indicator (B12-0303-24) Panel* (A60-) Knob* (K29-) Knob* (K29-) Knob* (K29-) Front glass (B10-2418-03) Video cylindrical receptacle* (E56-) Phone jack (E11-0271-05) Phono jack (E63-1030-05) Knob* (K27-) Knob* (K29 -) Lock terminal board (E70-0052-05) AC

5、power cord* (E30-) Miniature phone jack (E11-0373-05)x2 Oscillating module (W02-1114-05) AC outlet* (E03-) Screw terminal board (E70-0096-05) Phono jack (E63-0133-15) Phono jack (E63-1028-05) Front glass (B10-2451-03) * Refer to parts list on page 60. Phono jack (E63-1008-05) Phono jack (E63-1005-05

6、) Slide switch (S62-0034-05) Phono jack (E63-0139-15)x2 Phono jack (E63-0200-05) Phono jack (E63-0136-15)x2 Power cord bushing (J42-0083-05) Screw terminal board (E70-0095-05) Optical receiving module (W02-1181-05)x2 Video cylindrical receptacle (E56-0011-05)x2 Miniature phone jack (E11-0360-05) Pho

7、no jack (E63-0162-05)x2 Miniature phone jack (E11-0291-05) Miniature phone jack (E11-0374-05)x2 KRF-V7771D(K) COVER( 98.12.8 18:58 yW 2 RadioFans.CN 收音机爱 好者资料库 FM (T90-0835-05) indoor antenna (1) Remote (A70-1191-05) (RC-R0907) Battery cover(A09-0378-08) control unit (1) Loop antenna stand (1) Batte

8、ries(R6/AA) (4) AM loop antenna (1) (T90-0833-05) (J19-3645-05) Check that the following accessories are present. * AC (E03-0115-05) plug adaptor (1) * Use to adapt the plug on the power cord to the shape of the wall outlet. (Accessory only for regions where use is necessary.) KRF-V7771D/V8881D/VR-2

9、080/2090 2 CONTENTS / ACCESSORIES / CAUTIONS CONTENTS / ACCESSORIES / CAUTIONS.2 CONTROLS .3 DISASSEMBLY FOR REPAIR.5 BLOCK DIAGRAM .6 CIRCUIT DESCRIPTION.9 ADJUSTMENT. 17 WIRING DIAGRAM.19 PC BOARD .23 SCHEMATIC DIAGRAM .31 EXPLODED VIEW .59 PARTS LIST.60 SPECIFICATIONS .79 Contents Accessories Cau

10、tions How to reset the microcomputer The microcomputer may malfunction (impossibility of operation, 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

11、 the right to reset the microcomputer and return the unit to the normal condition. 1 Unplug the power cord from the wall outlet. 2 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 t

12、o the initial condition when the unit left the factory. U.S.A. and Canada 1 With the power cord plugged in, turn the POWER key OFF. 2 Whill holding down the ON/STANDBY key, press POWER key. Expect for U.S.A. and Canada Please note that the following items will be deleted from this units memory if th

13、e power cord is disconnected from the AC outlet for approximately three days. Memory backup function ?The frequency setting is cleared and 87.5 MHz is selected. ?The preset station memory is cleared. ?The surround setting is cleared and reset to the initial condition. ?The input selection is cleared

14、 and the “Tuner” input is selected. ?The volume setting is cleared and the volume is set to “-66 dB”. ?The receiving band setting is cleared and the “FM” band is selected. KRF-V7771D(K) COVER( 98.12.8 18:58 yW 3 RadioFans.CN 收音机爱 好者资料库 PHONES INPUT SELECTORVOLUME DTSDOLBY DIGITALCLIP INDICATOR POWER

15、 ON/STANDBY A B SPEAKERS MUTE DOWNUP DISPLAY MODE S VIDEOVL - AUDIO - R CD2 / TAPE2 MONITOR 3 48657# $%*&09! ON/STANDBY POWER ON OFF 21 AV AUX ST.ST. TUNED MUTE TUNED MUTE STANDBY indication 1POWER key (U.S.A., U.S.Military and Canada) Press to switch power ON and OFF. 2POWER key (Except for U.S.A.,

16、 U.S.Military and Canada) (China : POWER) Press to switch the main power ON and OFF. 3ON/STANDBY key (Except for U.S.A., U.S.Military and Canada) Press to switch the power mode between STANDBY and ON. 4STANDBY indicator Lights in STANDBY mode. 5RC sensor Receives signals transmitted from the re- mot

17、e control unit. 6PHONES jack Use for listening audio through headphones. 7SPEAKERS keys Press each key to switch the SPEAKERS A or SPEAKERS B ON and OFF. Stereo indicator MUTE indicator TUNED indicator Multi-mode display While standby indicator is indicated, a small amount of power is supplied to th

18、e system to back up the memory. In this mode, the system can be turned ON by remote control. Display 8Indicators CLIP INDICATOR : Lights when the input is clipped during analog to digital signal conversion. DOLBY DIGITAL : Lights when Dolby Digital is activated. DTS : Lights when the DTS is activate

19、d. 9MUTE key Press to mute the audio temporarily. 0RC transmitter Sends signals to the remote control unit. !Indicator Lights when signal is input from or output to the remote control unit. VOLUME control knob Rotate to adjust the volume. #S VIDEO input jack (Except for the VR-2080 or the KRF-V7771D

20、 for the U.S. Military destination) Connect the S VIDEO output jack of an AV component. $VIDEO input jack Connect the composite video output (RCA) jack of an AV component. %AUDIO (L, R) input jacks Connect the audio output (RCA) jacks of an AV component. CD2/TAPE2 MONITOR indicator Lights when the C

21、D2/Tape2 (Monitor) input is used. &DISPLAY MODE key Press to switch the display on the main unit. *INPUT SELECTOR key Press to switch the input as shown below. TUNER CD1 MD/Tape1 VIDEO1 VIDEO2 VIDEO3 VIDEO4 AV AUX PHONO KRF-V7771D/V8881D/VR-2080/2090 3 CONTROLS KRF-V7771D(K) COVER( 98.12.8 18:58 yW

22、6 RadioFans.CN 收音机爱 好者资料库 ON/STANDBY MUTE VOLUME ENTER Setup Surround SP Level Surr.SP Type SP Distance SP Selection TunerCD1 Video2Video3Video4Video1TV1 Phono TV2 CD2 MD/ Tape1 CD2/ Tape2 Input Digital Input Analog AV AUX Macro Remote Mode Main Menu CONFIRM NoteNoteNote Model Type Setup Model 3 Mod

23、el 2 Model 1 23 ? ? ? ? ? ) ? ( ? ? 1 6547 8 9 0 ! # $ % & *? ? RC : Infrared system Perform “Model Type Setup” of the RC before using it. The following menu display ap- pears after the batteries are loaded for the first time. Controls and indicators The Remote Control unit provided with the Receive

24、r can also control KENWOOD MD recorder, cassette decks, CD player, DVD player and LD player which are connected to it through system control cords. For details of the controllable functions, refer to the instruction manuals of these components. The displayed icons are variable depending of the “Mode

25、l Type Setup” for matching specifications with the Reciever which uses the RC unit and “Setup” for matching specifications with connected source component. 1Segment screen The fixed icons are displayed in this area. 2TV1 icon Select to display the TV1 control screen. 3Main Menu icon Select to displa

26、y the Main Menu screen. 4TV2 icon Select to display the TV2 control screen. 5Phono icon Select to select the PHONO in- put. 6Video1 icon Select to control Video1. 7CD1 icon Select to control CD1. 8Video2 icon Select to control Video2. 9CD2 icon Select to control CD2. (Room B only) 0Video3 icon Selec

27、t to control Video3. !Tuner icon Select to control Tuner. Video4icon Select to control Video4. #MD/Tape1 icon Select to control MD or Tape1. $CD2/Tape2 icon Select to monitor the CD2/Tape2 input. (Room A only) %AV AUX icon Select to select the AV AUX in- put. Input Digital icon Select to play a digi

28、tal input or to switch between Auto and Manual. &Macro icon Select to control Macro. *Input Analog icon Select to play an analog input. (Remote Mode icon Select to switch the remote con- trol operation mode without changing the selected input. Segment screen Operation keysMenu screen )Menu screen Co

29、ntrol key icons and con- trol levels are displayed in this area. ?Status display The example in the illus- tration shows the “Setup Surround” status. ?SP Selection icon Select to set up the speak- ers. ?Return icon Select to return to the pre- vious menu screen. ?Status display Shows the communicati

30、on status. ?Joy stick key This key is used to select an icon. This key can be controlled in 4 directions. ?ENTER key Press to enter the selection of an icon. ?VOLUME (up) control key Press to increase the volume. ?VOLUME (down) control key Press to decrease the volume. ?CONFIRM key Press to select t

31、he currently displayed items. ?MUTE key Press to mute the audio temporarily. ? (ON/STANDBY) key Press to turn this unit and the components connected to it through system cords between ON and STANDBY modes. KRF-V7771D/V8881D/VR-2080/2090 4 CONTROLS KRF-V7771D(K) COVER( 98.12.8 18:58 yW 7 6 6 3 4 4 9

32、9 3 3 2 11 12 1 4 3 5x2 9x5 8x2 3x2 7 13 13 13 14 14 15 10 1 2 2 2 1 x3 2x3 2 2 x2 x5 2x2 2 3 3 3 3 1 3 x29 Remove the bottom plate. Make use of the changing final transistor etc. 1. Remove the 19 screws (1, 2) and PCB support, then remove the bottom plate. Check the vertical PCB 1. (Exist bottom pl

33、ate) Remove the hook of rear panel(1). 2. Remove the 29(Exist bottom plate: 34) screws(2), then remove the rear panel. 3. Connect the GND of the phono terminal, the GND of antenna shield board,the GND of coax., the GND of system control shield board, the GND of SP terminal shield board and the chass

34、is with 5 wires connected alli- gator chips(3). Remove the escutcheon (operation panel) 1. Remove the knob(1), the nut (2), the 11 screws(3, 4, 5) and 2 hooks (6), then remove the front panel assy. 2. Remove the lead wire(7), the 2 screws(8 : except K,P type) and 7 screws(9) then remove the PCB. 3.

35、Remove the under front glass(0, -), then remove the front panel(=) from the sub panel. 4. Remove the 2 under escutcheon sides() by screw driver and the 2 hooks(!) then remove the escutcheon(). Fig. 3 Fig. 1 Fig. 2 KRF-V7771D/V8881D/VR-2080/2090 5 DISASSEMBLY FOR REPAIR KRF-V7771D(K) COVER( 98.12.8 1

36、8:58 yW 10 (X08) (X11) (X11) (X25) IC89 IC60 VR-2090 DIGITAL VR-2090DIGITAL REC SEL. IC71 OUT DIGITAL OPTICAL D-SEL2 D-SEL1 MAX:1.0Vrms TC9163AF-2 TC9164AF-2 OTHER OUT IN 200mV/2.2K 200mV/47K DIRECT FL,FR LS,RS, CENTER SUB IC78(2/2) IC80 IC78(1/2) IC76 80Hz LPF 21kHz LPF 21kHz LPF 21kHz LPF IC56 IC5

37、5 IC56 IC59 IC86 IC87IC52 IC62 AD/DA CS4226 DRAM DRAM SRAM ROM AC-3 DSPF56009FJ88 DTS DSPI56009FJ88 CONFIGRATION DSPB56007FJ88 BUFFER BUFFER IC74 IC5 BUFFER ROOM B LINE IC21(2/2) INPUT ATT L1,R1 L2,R2 (DIGITAL) (ANALOG) EQ IC1 IC23 IC1(1/2), IC2(1/2) IC4 IC1(2/2), IC2(2/2) IC72 (TAPE2 MONITOR) PHONO

38、 2.5mV/4.7K TUNER IC21(1/2) BUFFER LINE ROOM A L4,R4 PHONO IN R5 L3,R3L5,R5 L7,R7 REC OUT BUFFER IC3 L3 R3 R1 R4 R2 L8,R6 R3,R5 R2,R4 R1,R7 L2 TAPE1/MD IN L4 TAPE/CD2 IN L1 L1,R8 L2,L4 L3,L5 L6,L7 L5 L7 R8 R7 L8 BUFFER BUFFER BUFFER BUFFER VIDEO2 OPTICAL VIDEO3 OPTICAL CD COAXIAL VIDEO4 COAXIAL TAPE

39、2 REC VIDEO2 REC VIDEO1 REC TAPE1/MD REC VIDEO4 IN AV AUX IN VIDEO3 IN VIDEO2 IN VIDEO1 IN CD1 IN KRF-V7771D/V8881D/VR-2080/2090 6 BLOCK DIAGRAM (SIGNAL STAGE) KRF-V7771D(K) COVER( 98.12.8 18:58 yW 11 78 BLOCK DIAGRAM KRF-V7771D/V8881D/VR-2080/2090KRF-V7771D/V8881D/VR-2080/2090 (X07) (X25) (X08) (X2

40、5) (X07) (X25) (X25) VR-2080 RESET SDT MCK MREQ MDT SREQ MISO/SDA 7 6 7 .STB .RESET DATA IN CLK DATA OUT 6 5 51 7 SS SCK/SCL MISO/SDA HREQ GPI00 RESET MOS HREQ MISO/SDA HREQ GPI00 GPI02MOS SS RESET SCK/SCL .AUDIO .PDN .FREQO .AC-3 .ERR.FREQ1 CDIN CS CCLK CDOUT CLK DATA DATA CLK STB + To FAN SRAM DRA

41、M TUNER To DSP To ANALOG POWER To u-COM To POWER-RLY + + + SE-RLY + + + Y Y C C Y V-MUTE Y C Y C C Y Y C C Y V-MUTE C S1 (X08) (u-COM STAGE) IC53 VR-2090 27.9V/6 26.8V/6 24.5V/6 VR-2080 KRF-V8881D KRF-V7771D 5ch SP. OUTPUT VR-2090 VR-2090 VR-2090 AMPLIFIER AMPLIFIER FAN FRST/SLOW FAN ON/OFF DTS AC-3

42、 CONFIG SBUSYSDATA RXTX VR-2090 TC9163AF-1IC42 SYSTEM CONTROL (X08) J17 SYSTEM CONTROL (X08) J16 (X08) J15 SL16 TEXT DATA-IN 10DAC/ADC TUNER 5(A,B,CS,TR,POWER) 2 9TUNER 3 4 3 8 RELAY FAN VIDEO SEL. DIGITAL INPUT SEL. WIDE V-MUTE VIDEO SYNC TONE CONT. PROTECTION 455kHz FILTER VR-2090 (K,P) (X11) J13

43、(1/2) IR RECEIVER IN REPEATER OUT (X11) J14 VR-2090 (K,P) IC86 (X08) 6 FANFAN DRIVER (X07) Q211-215 PARALEL SIRIAL/ OUT LED (X11) D21-24 IR LED REMOTE OUT (X11) J13 (2/2)(X08) Q64-66 (X08) IC67 REMOTE u-COM SENSOR TV or LIGHT RELAY CONTROL (X11) J12 RDS (X08) IC68 (X08) IC69 MAIN u-COM DATA-OUT SUB

44、u-COM REMOTE SENSOR (X25) A1 KEY MATRIX FL (X25) ED1 FL DRIVER (X25) IC61 LED PEAK LEVEL LED 1.0/1K PRE OUT PRE OUT SPEAKERS FRONT A L,R PHONES C SL,SR FRONT B ROOM B SP C SL,SR SW SECOUND ROOM PRE OUT B-MUTE SW-MUTE S-MUTE A-MUTE RELAY B RELAY CS RELAY A RELAY S BUFFER IC31(2/2) BUFFER IC30 IC31(1/

45、2) BUFFER K2 29dB POWER (X25)(X07) 29dB POWER (X25)(X07) AMPLIFIER 29dB POWER (X25)(X07) K1 K1 K4 K3 MUTE Q1-4 MUTE Q36 MUTE Q33,34 Q35 MUTE SW-MUTE B-MUTE A-MUTE -20dB ATT MUTE Q5,6 MUTE MUTE MUTE MUTE Q3,4 Q11 Q7,8 Q12 BUFFERAMP IC22 IC26 IC24 (2/2) IC26 (1/2) ATT -20dB ATT -20dB ATT -20dB ATT Q1,

46、2 Q5,6 -20dB Q9 Q10 IC28 IC53 (2/2) IC52 IC53 (1/2) IC51 ROOM B IC27 IC25(2/2) IC23 IC25(1/2) IC21 VOLUME VOLUME VOLUME VOLUME VOLUME L7,R7 L8,R8 L4,R4 IC44 IC43 TONE L6,R6 L1,R1 L3,R3 L2,R2 (X11) LOW BOOST IC47,48 CONFIG-2 IC49 INV VIDEO SECOND(B) ROOM D82 GND +30V 63-65,73 IC57,61, AVR AVR IC82 AV

47、R IC83 D86 D311 EXCEPT K.P EXCEPT K.P (X07) T1 K5 D312 AC OUTLET DRIVER RELAY Q301 K6 STROKE SW FIL FIL -35VAVR Q311 D88 AVR IC84 GND +5.0V To VIDEO 5 To VIDEO 5 AVR Q85 AVR Q86 AVR Q83 AVR Q84 D81 +17V GND -17V DRIVER RELAY Q154 D252 D251 PRE DRIVE GND PRE DRIVE GND FINAL TR. FINAL TR. D301-304 GND +5.6V (X07) IC31 AVR Q13 VIDEO 2 Q14 VIDEO 1 Q12 Q30 Q16 Q31 Q15 MONITOR OUT 1Vp-p/75 (S1-VIDEO) PLAY REC AV AUX (FRONT) VIDEO 4 VIDEO 3 VIDEO 2 VIDEO 1 (VISUAL) 1Vp-p/75 (OSD) (SECOND ROOM)IC52(1/2) Q17 MONITOR OUT B Q55 MONITOR OUT IC52(2/2) IC13 TC74HC4051AP