Kenwood-KRC-156-Service-Manual电路原理图.pdf

© 2001-11 PRINTED IN JAPANB51-7855-00 (N)506CASSETTE RECEIVERKRC-165SERVICE MANUALMounting hardware assy(J19-9491-13)Screw set(N99-1719-05)Panel assy(A64-2500-02)Escutcheon(B07-2188-02)Lever(D10-3031-04)x2DC cord(E30-4784-05)KRC-1652BLOCK DIAGRAMIC1KEYMUTEB.U DET. B.UACCP-CONT.MUTEPREPOWER ICEQ. AMPAMPN.C.MPXE-VOL.FRONT LchFRONT RchREAR LchREAR RchJ2LEDCASSETTE MECHAMAINIC51 Lch2 RchPRE OUTIC2 IC4,Q151Q150,153IC3SP OUTREARRST SWRST ICIC6Q301ACC DET.P-CONT.ANT-CONTJ2J5FM+BQ200,201AM+BQ202,2035VAM BPFFM BPFQ450,451Q62Q50Q350-353Q53SW5VQ54-578VQ58-61ILLUMIBU5VQ51,52SYSTEM MI-COMRST Q370,371ANT-CONT7SEG LCDED1FM ANTAM ANTRF GNDFM+BAM+BOSC GNDOSC GNDOSC GNDVTPLL +BIFC OUTSDASCLDIG GNDIF1+BIF1 GNDS-METERIF2 GNDSDFM+BPONACC DETB.U DETSCLMUTESDAP CONRESETFWD/REVMOTORRchCOMLchTAPEMP INAMMPXOUT RROUT LROUT RFLEVELSCLSDAOUT LFSTBYMUTERchLchT-MUTEFWDREVB.USMUTE(FF/REW)BU5VAM+BVDD 5VPACK INANT CONBEEPSVRAMP. STBYSVRAC GND(BEEP)RchLchTAPE :1681mVAM :546mVFM :1781mV8VRF GNDOSC GNDIF2 +BAUDIO OUT8VS-METERSDPLL-SCLPLL-SDAHEADR55.6mVBU5VB.UB.U.5V8VBU5VAM: 170mVFM: 400mVLPACKINPLAYFF/REWILL5KS0-KS4 KI0-KI33SEG1-SEG22COM1-COM3AMP. MUTE8VBU5V(X16-)MA1(X14-)MOTOR SWQ260,26145422322KRC-1653a71 SYNTHESIZER UNIT (X14-6860-20)COMPONENTS DESCRIPTIONRef.No. Component Name Application/Function Operation/Condition/CompatibilityIC1 M38258MCD078FP System MI-COM. System controlIC2 TDA7400D E-VOL. & N.C. MPX Controls sound volume. Selects each source.IC3 HD74HC27FP Mute logic 3-input NOR gate × 3IC4 TDA7386 Power IC Amplifies power so that the speaker can drive audio signal.IC5 LA3161 Equalizer amplifier Equalizer amplifier for cassette tape soundIC6 PST9135NR Reset IC When BU 5V voltage is less than 3.5V, IC outputs Lo.Q50 2SC2412K or 2SD601ABACK-UP detection (Momentary power While BACK-UP is added, a base becomes Hi, down detection) SW and Q50 is turned on.Q51 2SB1443BACK-UP 5V AVRWhile BACK-UP is added, AVR outputs +5V.Q52 2SC2412K or 2SD601A Q51 and Q52 is inverted Darlington connection.Q53DTA114YK or UN2114 or KRA107SP.ON 5V SW While a base becomes Lo, Q53 is turned on.Q54DTC144EK or UN2213 or KRC104SCOM+B SWWhile Q54's base becomes Hi, Q55 is turned on.Q55DTA124EK or UN2112 or Works during POWER ON mode.KRA103SQ562SA2057 or 2SB1548(P) or While Q57's base becomes Hi, Q56 is turned on.2SB1565(E,F) or 2SB1655(E,F) COM+B AVRQ57 2SC2412K or 2SD601AQ56 and Q57 is inverted Darlington connection.Q58DTC144EK or UN2213 or KRC104SIllumination +B SWWhile Q58's base becomes Hi, Q59 is turned on.Q59DTA124EK or UN2112 or Works during POWER ON mode.KRA103SQ602SA2057 or 2SB1548(P) or 2SB1565(E,F) or 2SB1655(E,F) Illumination +B AVRWhile Q61's base becomes Hi, Q60 is turned on.Q61 2SC2412K or 2SD601AQ60 and Q61 is inverted Darlington connection.Q62 2SC2412K or 2SD601A ACC detection SW While ACC is added, Q62 is turned on.Q150DTC124EK or UN2212 or When BACK-UP detection SW or RESET SW or KRC103SElectric volume mute SWMI-COM.'s mute works, a base becomes Hi, and Q150 is turned on.Q151DTC114YK or UN2214 or When POWER IC RESET is activated, KRC107SSVR discharge SWa base becomes Hi, Q151 is turned on.Q153DTA124EK or UN2112 or When BACK-UP detection SW or RESET SW or KRA103SPre-out mute driverMI-COM.'s mute works, a base becomes Lo, and Q153 is turned on.Q200DTC124EK or UN2212 or KRC103S FM +B SWQ201 is turned on when Q200's base becomes Hi.Q201 2SB1277(Q,R)Works during FM reception mode.Q202DTC124EK or UN2212 or KRC103S AM +B SWQ203 is turned on when Q202's base becomes Hi.Q203 2SB1277(Q,R)Works during AM reception mode.Q260DTC114YK or UN2214 or KRC107S Motor +B SWWhen Q260's base becomes Hi, Q261 is turned on.Q261 2SB1443Works during TAPE mode.Q301 DTA144EK or UN2113 RESET SW When a base becomes Lo, Q301 is turned on.Q350 2SB1277(Q,R) P-CON. driver When Q353's base becomes Hi, Q350 is turned on.Q351 2SA1037K P-CON. protection SW Works when P-CON is being short-circuited on GND.Q352DTA124EK or UN2112 or KRA103SP-CON. Protection inhibit SW Inhibits protection SW function when P-CON works momentary.Q353DTC114YK or UN2214 or Q353 is turned on when a base becomes Hi.KRC107SP-CON. SWWorks during POWER ON mode.Q370 2SB1277(Q,R)Q370 is turned on when Q371's base becomes Hi.Q371DTC114YK or UN2214 or ANT-CON. SWKRC107SWorks during TUNER mode.Q450 DTC143TK or UN2216 Pre-out mute SW (R Ch.)When BACK-UP detection SW or CHANGER RESET SW or MI-COM.'s mute works, a base becomes Hi, Q451 DTC143TK or UN2216 Pre-out mute SW (L Ch.)and Q450, 451 are turned on.KRC-1654a71 Terminal Description (IC1 : X14-6860-20)Pin No. Pin name I/O Description Processing Operation1 I N.C. (Not used)2 VL1 IPositive power supply connection terminal 1 for LCD driver3 KI0 I Key return input 04 KI1 I Key return input 15 KI2 I Key return input 26 KS0 O Key scan output 07 KS1 O Key scan output 18 KS2 O Key scan output 29 KS3 O Key scan output 310 S METER I S-meter input from the F/E11 KS4 O Key scan output 412 BEEP O BEEP sound output13 O N.C. (Not used)14 MOTOR O Cassette motor on/off output Hi : Motor ON15 FF/REW I FF/REW detection input Lo : FF/REW, Hi : PLAY16 PACK IN I Cassette tape Pack-in detection input Lo : Pack-in17 KI3 I Key return input 318 FWD/REV I FWD/REV mode detection input Lo : REV mode19-25 O N.C. (Not used)26 SD I SD input from the F/E Hi : Station detected27 PLL CLK O Clock output to the F/E28 PLL DATA I/O Data input/output with the F/E29 IFC I N.C. (Not used)30 AM+B O AM+B ON/OFF output Hi : during AM reception31 FM+B O FM+B ON/OFF output Hi : during FM reception32 SCK O Clock output to the E-VOL. IC33 SDA I/O Data input/output with the E-VOL. IC34 O Pull down to GND lines. (Not used)35 RESET I RESET input Lo : System reset36,37 O N.C. (Not used)38 XIN - Main clock resonator connection terminal39 XOUT - Main clock resonator connection terminal40 VSS - Ground connection terminal Connected to GND lines.41 IC2 Type 1 I Constant select terminal 1 Pull down to GND lines.42 IC2 Type 2 I Constant select terminal 2 Pull down to GND lines.43 O N.C. (Not used)44 SEL1 I Destination select terminal 1 KRC-165 : (SEL1, SEL2)=(Lo, Hi)45 SEL2 I Destination select terminal 2 RX-290 : (SEL1, SEL2)=(Hi, Lo)46 MUTE O Audio mute on/off output Hi : Mute ON47 STBY O Power IC standby control output Hi : POWER ON modeWhen the momentary power down, after 48 SVR O Power IC reset terminal ACC ON/OFF is detected and after POWER OFF, the output becomes Hi temporarily.49 ACC DET I ACC detection input Hi : ACC OFFHi : When momentary power down detected 50 B.U. DET I Momentary power down detection input or B.U. OFFLo : B.U. ONMICROCOMPUTER'S TERMINAL DESCRIPTIONKRC-1655Pin No. Pin name I/O Description Processing Operation51 P-MUTE O Power IC mute control Lo : Mute52 ANT CON O Antenna control Hi : during FM/AM reception53 P CON O Power control Hi : POWER ON mode54 ILL ON O Illumination AVR ON/OFF control terminal Hi : POWER ON mode55 O N.C. (Not used)56 SW5 O SW 5V control Lo : POWER ON mode57 EQ MUTE O Tape equaliser mute on/off output N.C. (Not used)58-68 O N.C. (Not used)69 SEG22 O LCD segment output 2270 SEG21 O LCD segment output 2171 SEG20 O LCD segment output 2072 SEG19 O LCD segment output 1973 SEG18 O LCD segment output 1874 SEG17 O LCD segment output 1775 SEG16 O LCD segment output 1676 SEG15 O LCD segment output 1577 SEG14 O LCD segment output 1478 SEG13 O LCD segment output 1379 SEG12 O LCD segment output 1280 SEG11 O LCD segment output 1181 SEG10 O LCD segment output 1082 SEG9 O LCD segment output 983 SEG8 O LCD segment output 884 SEG7 O LCD segment output 785 SEG6 O LCD segment output 686 SEG5 O LCD segment output 587 SEG4 O LCD segment output 488 SEG3 O LCD segment output 389 SEG2 O LCD segment output 290 SEG1 O LCD segment output 191 VCC - Positive power supply connection terminal Connected to B.U.5V lines.92 VREF - A/D converter reference voltage input terminal Connected to B.U.5V lines.93 AVSS - A/D converter GND connection terminal Connected to GND lines.94 O N.C. (Not used)95 COM3 O LCD common output 396 COM2 O LCD common output 297 COM1 O LCD common output 198 VL3 IPositive power supply connection terminal 3 for LCD driver99 VL2 IPositive power supply connection terminal 2 for LCD driver100 I N.C. (Not used)MICROCOMPUTER'S TERMINAL DESCRIPTIONKRC-1656TEST MODE / ADJUSTMENT1. How to enter the test mode Reset the unit while holding the Track Down key and preset6 key. All indication segments go ON at the beginning of the testmode.2. How to release the test mode Simply reset the unit. (NOTE) The test mode is not canceled by ACC OFF, powerOFF, momentary power down or the panel off.3. Contents Set the volume level to -10dB (which is shown as “30“ onthe display). Loudness OFF. The BASS / TREBLE and BALANCE / FADERcontrols can be set to the full boost / center / full cut and fullright / center / full left and full front / center / full rearrespectively. Sound coordination doesn't appear for the Audio mode feed. The inspection function of LCDWhen all indication segments are ON, the segments can beset to the following order respectively by pressing the Trackup key / Track down keys.All indication segments Odd segments (Common 1 part) Even segments (Common 2 part) Odd segments(Common 3 part) All indication segments When the unit is reset (backup turned on) while ACC is OFFin test mode, the MUTE terminal goes off in 2 seconds.Set the controls and switches as follows.BALANCE : center position BASS : center position LOUDNESS : OFFFADER : center position TREBLE : center position(2-LINE TAPE)BABA(FWD)(RVS)HEIGHT(FWD)HEIGHT/AZIMUTH(FWD)HEIGHT/AZIMUTH(RVS)TAPE SPEEDHEIGHT(RVS)F ''FRRITEM TAPEOUTPUTSETTINGSRECIEVERSETTINGSALIGNMENTPOINTSNo.HEADHEIGHTHEADAZIMUTHSCC-1659TCC-15310kHz-Connect an ACvoltmeter andoscilloscope toSP outputs.TAPE PLAYTAPE PLAYHeadHeightScrewHeadAzimuthScrewALIGN FOR1) During FWD transport adjust F and F ' so that line Aof 2-LINE TAPE passes through the center of thehead shield plate (core center area)2) During RVS transport adjust R and R ' so that line Bof 2-LINE TAPE passes through the center of thehead shield plate (core center area)3) After the alignment above, reverse the transportdirection and check the FWD alignment again. If it isdeviated, perform alignment again. (Tape used :SCC-1659, manufactured by A-BEX)Adjust the azimuth for each L ch/R ch or FWD/RVSbecomes maximum.12CASSETTE DECK SECTIONTEST MODEADJUSTMENTA B C D E F G H I J123456778W83W60W66W67W86W81W85W62W59W50W25L8/W11W200/L5W52W78W48W10W57W55W65W63C150W76W77C206L9W74W75W80W36 W26W34W18W8W2W40W24W13W73C4C3W16 W15W21W72PL1W1W4W19L4L10/W84W7W9W69W17W5W70W12W6W20W64W28W41W61 W22W47 W45W30W32W53ED1W29W54W56W51W49W27W35W58W37W31W38W44W14W23W33W46W43W68W79W39PL2R200R202C15R55R67R350 R370R373C55C56R371R307R303R50R65R351R353R66C50C160R300C161C350C352C162C159R106C58C53C57L1R261R260R302C9C250C10R301R105R104R110R340X1C152C18C16 C17C451C450L3R119R11198161151825 122461124BEBEBEBEEBBEBEEB(J74-1318-02)J2A1IC4WH1D261P1Q201Q203D200J1Q60Q56D370D50Q370D371CN2D151D152D150D352J5Q51Q350D56 D52D51D55D54D350D351D53D101Q261D260IC5CN1D13D102D103D104D100X14-6860-20C600C601R203R201R207C154R206C156C157C155C151R150R205W116C210C251R251W115R135C14R58W118R155R15W112R14R62W113R152C52R59W109R57W117W114R16 R13W110C153C158R372R151R156C13R52R54R352C351R154R153C54R63R64C452C202C200R455R453R454R451R450C201R452R158C1 R1C2 R2C5C6W121C8 R8R4R6C7 R7R5R3C164R134C60R108W102R250W111R101R102R103W120R120R121R123R122R157C103W104C102W103W105W106C104R109R124R125R127R126R107C101W108R114R115R117R112R131R113R69W107R68R118W101TH111415281714 814513305180 811005031BEBE BEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEBEQ200Q202Q150IC1Q153Q61IC2Q52Q371Q59Q58Q57Q151Q55Q62Q54Q53Q50Q353Q352Q351Q451Q450Q260IC3Q301IC6R4R1R2R3SRC1ATT AUDBANDRSTCLKAUTO23 45 6D10 D11D12D8D9D3D2D1D6D5D4X16-1500-20 (J74-1299-12)112CN1X16-1500-20 (J74-1299-12)(COMPONENT SIDE VIEW)(FOIL SIDE VIEW)IC Q address16C24E3442D55B65D50 4B51 4B52 4B53 4B54 3B55 3B56 2A57 3A58 4A59 4A60 3A61 3A62 4C150 4E151 3D153 3E200 4F201 3F202 4F203 4F260 5E261 5F301 5E350 3C351 4C352 4C353 4C370 3C371 4D450 3E451 2EX14-6860-20PC BOARD (COMPONENT SIDE VIEW)Refer to the schematic diagram for the values of resistors and capacitors.A B C D E F G H I J12345670V4.1V3.3V 8.3V 0V 3.3V0V7.2V0V0V 4.5V14.0V0V 7.2V 7.0V7.0V7.0V 0V14.0V3.8V 0V7.2V 7.2V 7.2V 7.2V0.8V1.3V7.0V1.8V0V4V0V5V0V5V0V5V0V5V0V0V0V 0V5.0V0V0V5V0V5.0V5.0V3.4V4.0V0V5V8.3V4.8V14.0V14.0V14.0V10.2V10.2V8.3V5.0V8.3V8.3V13.8V5.0V5.0V0V3.4V7.2V 7.2V 7.2V1.3V0.8V0V5V0V0V5.0V0V5V0V5V0V5V4.7K4.7K22K22K47K10K47K10K22K22K22K22K47K22K47K22K47K10K 22K22K22K22K47K10K47K22K47K22K47K47K47K10K1 2 63 4 5FWD/REVGNDHEAD RHEAD COMHEAD LT.MUTEGNDMOT GNDMOT+BGNDPACK INLch1 2FWDREVRchRef.9963 4 5AM+B1923202122AUDIO OUTSDS-METERIF1+B141718VDD 5VIF2+B1516SDASCLDIG GND10111213OSC GNDVTPLL+BIFC OUT789OSC GNDOSC GNDOSC GNDFM ANT3456AM ANTNCFM+B12RF GND1410u16C450 +270R45010u16C451R451R454100R45230K2 LchR45330KR455100+2701 2 4 53 7 861091211 13CDROUT LR1 RchACOUT LACOUT ROUT LF OUT RFCREFVREF TAPERTAPEL28 27 25 2426 20OUT RRVDDPH-CD LCD GND AMPH+212223GNDMUX R MUX LSMUTESDASCLQUALMPX MP INLEVEL1819 1517 16MP OUT2 4 6 8 10 12 14 16 18 20 22 24GNDSTBYVCC GND SVRRR INFL INACGNDGND VCCMUTEGND1 3 5 7 911 13 15 17 19 21 23 25TABRR- RR+ FR- FR+ FR IN GND RL IN RL+ RL- FL+ FL- CD17 232119654321T.MUTEGNDMOT GNDMOT +BPACK INGND10KR2611K47KR570.01C5247KR553.3K33KR5210KR54R3511KR3523.3u25C350+22KC3510.1u50C352+1K 1/2W0.0684.7KR160.22u50C180.22u50C154.7KR130.22u50C174.7KR150.22u50C16R14 4.7K100u10C159+ +C16010u161K4.7K4301u50+180K1u50C162+33K7500.01C161R154R155R156232425260.01C15147u10C150+L3 4.7uHQ4510.1C1584.7KR1500.1C1550.015C1530.22C1540.033 150PC157C156C14C131u50C152+24IF1 GNDIF2 GND0.01C200R20515027284.7uH47u10+12345123450.047C25110KR2511500PC21500PC122KR122KR2100u16C57+10K100u10C58+1KR641KR63R652.2 1/2WR662.2 1/2W4.7K2.7KR207 R2064324260.22 0.2248 47 5149C56100u6.3+10u10R5822K100R59C55+C540.01100u16+53R68100K 22KR693 75 9+0.0224C7120KR7100u10 100+100PC5C96.8KR3L IN8L NFL OUT76C347u6.3310R250120KR8C250100u10+C80.022C10100u10R4100GNDVCCR OUT54100PC6R NF32+C447u6.3R IN11/2W0.01C21032332523C531/2WTH1C4521234 5R373R371R370 4.7K1K 1/2W22KR3721K 1/2WW83100R1350.01C1643031R2001KC201 0.01R2021KR20322KR20122KW841110987654321100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 8131 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50AM+BPLL DATAPLL CLKSDFWD/REVKI3PACK INFF/REWMOTORREMOBEEPKS4SMETERKS3KS2KS1KS0KI2KI1KI0VL1VL2 VL3COM1 COM2 COM3 AVSSVREFVCCSEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9SEG10P-MUTEANT. CONP-CONILLONSW5EQ-MUTESEG22SEG21SEG20SEG19SEG18SEG17SEG16SEG15SEG14SEG13SEG12SEG11FM+B SCK SDARESET XIN XOUT VSS IC2 TYPE1 IC2 TYPE2 SEL1 SEL2 MUTE STBY SVR ACC DETBUDETR102121110987654321RSTKI3KS4KS3KS2KS1KS0KI2KI1KI0ILL +BILL-GNDR307 2.2KR110 1KR106 1KR105 1K R104 1K21213141516171819202122232425262728293052515354655755565859606162636470666768697172737475787677798097R302 47KR303 47KR300 47K47K51545352562630272810 R3015647KX18MHz27PC10227PC10349484746 50727170697680797877747375879