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MD RECEIVER
KMD-671R
SERVICE MANUAL
© 2000-1 PRINTED IN JAPAN
B51-7580-00(S) 2209
l This service manual does not include information on the MD mechanism assembly (explodedview, parts list,
schematic diagram or mechanism description).
For such information, refer to the MD mechanism assembly manual (X92-3390-00,0-01,X92-3560-00,
X92-3580-00:B51-7461-00).
Front glass
Escutcheon
Panel assy
(A64-1881-02)
(B10-3117-01) (B07-2181-02)
SRC
KMD-671R
PWR +
DISC
OFF
MD RECEIVER CD·MD-CHANGER CONTROL 45W
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KMD-671R CONTENTS BLOCK DIAGRAM .............................................................. 2 SCHEMATIC DIAGRAM ................................................... 11 COMPONENT DESCRIPTION ........................................... 3 EXPLODED VIEW ............................................................ 17 MICROCOMPUTER’S DESCRIPTION ............................... 4 PARTS LIST...................................................................... 18 ADJUSTMENT ...........................
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KMD-671R COMPONENT DESCRIPTION l SWITCH UNIT(X13-9702-71) Ref.No. Component Name Application/Function Operation/Condition/Compatibility IC1 LC75808W LCD driver with key-matrix IC2 RS-171 Remote control light sensor Q1 DTA114EKorUN2111 Key-matrix permission SW Ready on key-matrix, ON when the base goes “Lo”. Q2 2SD2114K Illumination SW(Red) ON when the base goes “Hi”. Q3 2SD2114K Illumination SW(Green) ON when the base goes “Hi”. Q4 2SC2412Kor2SD601A LCD AVR l ELECTRIC UNIT(X25-845X-XX) Ref.No. C
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KMD-671R MICROCOMPUTER'S DESCRIPTION System μ-com : UPD784216GF520 l Terminal Description Pin No. Pin Name I/O Description Processing Operation 1 TYPE 0 I Destination type input terminal 0 Pull up to BU 5V lines 2 TYPE 1 I Destination type input terminal 1 Pull down to GND 3 N.C. O Not used 4 N.C. O Not used 5 N.C. O Not used 6 N.C. O Not used 7 N.C. O Not used 8 N.C. O Not used 9 VDD - VDD connection terminal Connected to BU 5V lines 10 STBY O Power IC standby control output “Hi”: POWER ON mode
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KMD-671R KMD-671R MICROCOMPUTER'S DESCRIPTION ADJUSTMENT Pin No. Pin Name I/O Description Processing Operation TEST MODE 50 N.C. O Not used 1. To enter test mode 51 AVDD - VDD connection terminal Connected to BU 5V lines While holding the “FM” key and preset “6” key, reset the unit. 52 AVREF 0 - VDD connection terminal(A/D converter reference Connected to BU 5V lines All indication segments are ON at the beginning of test mode. voltage input) 53 PHONE I PHONE detection input 1V or less: TEL MUTE
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KMD-671R KMD-671R MICROCOMPUTER'S DESCRIPTION ADJUSTMENT Pin No. Pin Name I/O Description Processing Operation TEST MODE 50 N.C. O Not used 1. To enter test mode 51 AVDD - VDD connection terminal Connected to BU 5V lines While holding the “FM” key and preset “6” key, reset the unit. 52 AVREF 0 - VDD connection terminal(A/D converter reference Connected to BU 5V lines All indication segments are ON at the beginning of test mode. voltage input) 53 PHONE I PHONE detection input 1V or less: TEL MUTE
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A B C D E F G H I PC BOARD (Component Side View) 1 ELECTRIC UNIT SWITCH UNIT ELECTRIC UNIT (X25-845X-XX) X25-845X-XX (J74-0980-12) X13-9702-71 (J74-0982-12) Ref. No. Address IQ C D26 1F 3 1 15 R116 214 2D 3 X3 4.332MHz Q9 Q24 3G 4 J4 R22 4D 6 D51 B E D50 W1 D24 6G 4 C89 C88 2 E B Q34 R24 16 9 R117 B E 7F 2 Q8 Q7 CN1 C9 B E Q10 EB EB 8F 4 R30 IC10 1 21 W20 R31 1C 0 2 R175 R174 W21 IC7 1G 3 2 20 D5 3 1 1 8 E B 2G 3 C65 W22 4 5 3G 4 E B R67 R65 W23 R45 4G 3 Q30 C5 Q32 R42 R69 5G 3 R68 R66 C70 R46 B
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SRC D7 D24 2 4 D19 68 IC2 1 LCD C6 1 3 FM D1 50 26 D2 D20 D22 51 25 D8 Q2 Q3 D18 AUD D9 IC1 D21 R19 1 2 14 75 B D16 J1 D10 AM D17 D14 CLK TI 76 100 D15 E D13 D12 1 6 5 4 3 2 1 RST ATT 15 D11 J K L M N O P Q R PC BOARD (Foil Side View) 1 SWITCH UNIT ELECTRIC UNIT ELECTRIC UNIT (X25-845X-XX) X25-845X-XX (J74-0980-12) X13-9702-71 (J74-0982-12) Ref. No. Address IQ C D26 1M 3 R116 15 1 2O 3 14 2 X3 4.332MHz Q9 3L 4 Q24 J4 4O 6 R22 E B D51 W1 D50 6L 4 C88 C89 2 R24 B E Q34 9 16 7M 2 R117 E B Q7 Q8 C9
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A B C D E F G H I DC CONNECTOR 1 FUSE 10A (X25-845X-XX) J1 SIGNAL LINE IC1 : UPD784216GF520 Q1,29,30,34 : 2SC4081 or Q9 : 2SD1760 Q17,18 : 2SC2412K or D1 : S2V20 A D16,17,22,23 : MA4068(N)-M 910 11 12 13 14 15 16 GND LINE IC2 : TDA7400D 2SD1819A Q10 : 2SA1036K 2SD601A D2,6,7,9,10,30-37 D18,41,44-46 : MA4062-L 8 7 6 5 4 3 1 2 B LINE IC3 : M5237ML Q2,5 : 2SB1565F(E,F) Q13,26,28 : 2SB1277(Q,R) Q21,22 : DTC143TK or : AM01Z or D19,25 : DAP202K or IC4 : TDA7386 Q3,8 : DTA124EUA or Q16,23 : DTC114Y
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+ + J K L M N O P Q R (E63-0852-05) 4 8 12 PRE OUT 3 7 13 11 2 REAR 10 6 9 5 1 J2 DTA114EK DTA124EUA 1 DTA124EK DTC144EUA WH1 8.2V ANT IN DTC114TK KRC104S A1 C71 DTC114YK MUTE J3 REQC 0.01 1 POWER IC RF GND 1 59 IC4 2 REQH OUT DTC124EK FM ANT L9 7.3V 14.4V DATAC C72 7.4V 4.5V 7.3V GND AGND 52mH L10 4.7uH CLK 0.01 3 7.3V 3.3V 7.4V 26 10 0V 14.4V OV 7.2V 7.3V OV DTC143TK AM ANT FM +B 13 4 SW 7.3V OSC GND B.U. RST DATAH IN L2 4.7uH 5 DTC144EK 8.2V 3 7 11 FM +B R142 Q26 GND 8.2V 6 1K AM +B KRC103S Q
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S T U V W X Y Z AA X25- J4 (X13-970X-XX) 1/2 1 A 2 1 D26 D27 5V 100 DI 100 0V 5V 99 26 CL 99 0V 26 S26 5V 98 27 0V CE 98 27 S27 97 28 DO 97 28 S28 5V 96 29 96 0V INH 29 S29 Q4 95 30 OSC 0V Q2,3 30 S30 VLCD 94 31 TEST AVR J1 31 S31 ILLMI SW 93 2 32 Q3 VSS 15 D-GND R13 32 S32 R29 92 10K 0V 33 VLCD4 R14 PAN 5V 14 85 33 S33 4.7K 4.7 91 Q2 R12 34 VLCD3 13 ILL-GND 1.8V 10K 34 S34 R15 C3 0.22 90 84 35 VLCD2 3.6V 35 S35 D25 89 R16 4.7K C4 0.22 R28 36 5.4V VLCD1 750 36 S36 IC1 88 R17 4.7K C5 0.22 KI1 37
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KMD-671R EXPLODED VIEW (UNIT) A B 1 2 3 Parts with exploded numbers larger than 700 are not suppied. 17
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KMD-671R PARTS LIST * New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. SWITCH UNIT (X13-9702-71) Teile ohane Parts No. werden nicht geliefert. A A N Dest A A N Dest Ref.No. d d e Parts No. Description inati Ref.No. d d e Parts No. Description inati d d w on d d w on E 2A N80-2006-46 PAN HEAD TAPTITE SCREW KMD-671R F 2A N80-2008-45 PAN HEAD TAPTITE SCREW 202 1B A52-0739-12 TOP PLATE G 2A N30-2608-45 PAN HEAD MACHINE SCREW 203 1
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KMD-671R PARTS LIST * New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. ELECTRIC UNIT (X25-845X-XX) Teile ohane Parts No. werden nicht geliefert. A A N Dest A A N Dest Ref.No. d d e Parts No. Description inati Ref.No. d d e Parts No. Description inati d d w on d d w on C88 ,89 CC73GCH1H100D CHIP C 10PF D ELECTRIC UNIT (X25-845X-XX) C90 -92 C90-2983-05 ELECTRO 100UF 35WV D26 B30-1511-05 LED (RED) C93 C90-2980-05 ELECTRO 220UF 16
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KMD-671R PARTS LIST * New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. ELECTRIC UNIT (X25-845X-XX) Teile ohane Parts No. werden nicht geliefert. A A N Dest A A N Dest Ref.No. d d e Parts No. Description inati Ref.No. d d e Parts No. Description inati d d w on d d w on R32 RK73GB1J102J CHIP R 1.0K J 1/16W R132 RK73EB2B100J CHIP R 10 J 1/8W R38 RK73EB2B241J CHIP R 240 J 1/8W R133,134 RK73EB2B222J CHIP R 2.2K J 1/8W R39 RK73GB1J4
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KMD-671R PARTS LIST * New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. ELECTRIC UNIT (X25-845X-XX) Teile ohane Parts No. werden nicht geliefert. A A N Dest A A N Dest Ref.No. d d e Parts No. Description inati Ref.No. d d e Parts No. Description inati d d w on d d w on D30 -37 ERA15-01 DIODE M1 Q25 UN2212 DIGITAL TRANSISTOR D41 MA4062-L ZENER DIODE Q26 2SB1277(Q,R) TRANSISTOR D44 -46 MA4062-L ZENER DIODE Q27 DTC124EK DIGITAL TR
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KMD-671R SPECIFICATIONS KMD-671R FM tuner section Wow & Flutter ............................................. Below Measurable Limit Frequency Range(Frequency step) ............ 87.5MHz~108.0MHz(50kHz) Frequency Response .................................. 20Hz~20kHz(±2dB) Channel Space Selection ............................ FIX(M type) THD ............................................................. 0.03%(1kHz) Usable Sensitivity(S/N 26dB) ...................... 0.7μV/75Ω S/N Ratio ............
