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1、 2000-3 PRINTED IN JAPAN B51-7600-00 (S) 3344 SERVICE MANUAL CASSETTE RECEIVER KAC-719 SUBWOOFER AMPLIFIER KAC-719 Dressing panel (A21-4014-03) Heat sink (F01-1627-01) Screw terminal board (E70-0820-05) Accessory (E type only) (W01-0797-05) Fuse (F52-0015-05) Screw set (N99-1587-05) SUBWOOFER AMPLIF
2、IER L 12dB 6dB BASS BOOST OFF INPUT SENSITIVITY(V) LPF FREQUENCY(Hz) GND R LINE IN 25Hz 15Hz INFRASONIC OFF 0.3 0.5 1 23 45 0.2 150 170 100 70 50200 LEFTRIGHT SPEAKER LEVEL INPUT POWER INFUSE (30A) BATTGNDP.CON(REMOTE) SPEAKER OUTPUT 30 SERVO II SERVO II Pin jack (E63-0834-05) Screw terminal board (
3、E70-0818-05) Screw terminal board (E70-0808-05) Screw terminal board (E70-0824-05) Accessory (W01-1515-05) ADJUSTMENT KAC-719 2 CIRCUIT DESCRIPTION SP P-CON Switching Circuit When the SP output from the head unit is connected to SP IN, the power can be switched ON/OFF based on the DC voltage of the
4、SP output. However, As certain head unit models output DC permanently or generate a click during switching OFF, it is required to provide the capability of previous P-CON switching. A circuit which can perform the switching without using a switch is described below. This circuit performs switching b
5、y inhibiting the operation of the S-P-CON circuit when a voltage is applied to the P-CON pin. Circuit operation description When the head unit is connected to SP-INN, the DC component in the SP output turns Q38 ON through D32 and R158. When a voltage is applied to the P-CON pin under this condition,
6、 Q45 is turned ON via R188, positive feedback is applied by combination of Q45 and Q46, Q45 and Q46 are held at ON, so the voltage at point (A) is almost 0 V and the SP-P-CON circuit is not activated. This circuit holds the ON status while the DC voltage from SP is present. Therefore, in this condit
7、ion, the P-CON circuit continues functioning. To cancel the functioning, the voltage at the SP-IN pin should go 0 V. Q46 4.7k R158 to P-CON terminal from SP-P-CON D32 R188 100k 10u 35 3.3k Q45 A Q38 power control D29 7.5v NoITEM INPUT SETTINGS OUTPUT SETTINGS TUNER (RECEIVER) SETTINGS ALIGNMENT POIN
8、TS ALIGN FORFIG. Connect a cassette receiver or other receiver. 1 IDLE CURRENT Connect a DC voltmeter to CN3 Volume : 0VR3 After sufficient aging adjust to 2mV (a) Refer to the schematic diagram for the values of resistors and capacitors. 34 ABCDEFGIH 1 2 3 4 5 6 7 AUDIO UNIT PC BOARD (Component Sid
9、e View) AUDIO UNIT (X09-5320-10) 18 16 X09-5320-10 A/3 (J74-1030-11) 9 1 17 14 BBEE BE BE B E B E B E B E B B E E B BE BE BE 12345678 BE BE BE EB EB EB B B E BE E BE BE BE BE EB EB E BE BE BE BE BE BE BE BE BE BE BE G D S G D S G D S G D S 8 4 85 S1 INFRASONIC OFF/15Hz/25Hz BASS BOOST OFF/6dB/12dB C
10、22 R91 W4 R42 R88 R102 D8 Q13 Q6 Q11 D7 R77 R101 R103 R80 R81 R105 R106 R104 R83 R82 R52 R44 R43 Q10 Q9 Q4 Q3 D5 Q15 Q5 Q7 Q8 Q12 Q16 C61 C38 C62 VR3 W15 W17 W28R187 R162 R107 R109 C63 C64 R19 R165 R164 R163 R108 R110 W30 W33 W34 W32 W16 W40 W46 W48W47 W45 W41 D20 D18 D17 D15 D16 D13 D14 D12 D19 W20
11、 TH1 W22 W25 W27 W29 W31 W44 W51 D11 D9 D6 W52 W53 W54 C39 W55 W73 W76 R76 C40 C47 C21 R84 R9 R8 R28 R14 R15 R10 R27 C6 C12 D3 D4 R37 R41 R38 W19 W23 W26 W42 W39 W18 Q14 R46 R49 R47 W38 W37 W43 W56 C3 R3R4 C4 C7 C9 C8 C67 C68 C75 W97 C10 IC3 C57 C59 R140 R112 R114 R116 R113 R157 W117 R141 R111 R115
12、R137 R131 R132 C54 C53 R139 W109 W110 W113 W114 W115 R134 R138 R136 W201 CN4 L1 L2 C56 TH2 R159 W100 W103 W104 W105 W106 W107 W108 W99 W112 W119 R142 R143 R144 W101 W102 W121 W125 W122 R133 W118 W123 W202 C55 R135 W120 W124 E2 J2 X09-C/3 J1 E1 X09-B/3 W116 C58 CN1 R39 VR1 R32 R33 R36 R35 R40 C5 C1 C
13、2 R1 R2 R5 R6 R7 R34 C14 C15 W58 W80 R184 R185 W87 W96 W98 R170 R160 R194 W92 W90 W88 R23 R22 R21 R24 W57 R31 R50 W14 R92 R86 W1 W21 R90 R89 R85 R87 R166 R167 R168 Q41 Q28 Q27 W13 W2 W6 W8 (a) 2mv CN3 IC4 R161 C71 C72 C73 C74 W7 W3 W5 D10 W36 W50 W49 R78 R13 R25 R26 W59 W60 W61 W74 W71 W72 R180 R179
14、 R186 R182 R178 R175 R171 R173 R174 R172 R177 R176 W82 W81 R67 R63 R62 C32 C33 C36 C37 R69 C35 W79 W84 W86 C51C52 C34 C11 C76 C65 C66 CN2 R229 R228 R118 R120 R117 R119 C31 R16 R61 R66 R65 R70 R68 R18 W68 W69 W70 R226 C46 C45 C77 C42 R96 C78 C44 C43 K1 C79 W77 W78 R227 R17 R155 R156 R151 R153 R154 R1
15、58 R152 J3 J4 R169 R224 R225 J5 R95 R193 R188 W63 W62 R93 R79 R74 R72 R71 C48 W65 W66 W83 W95 C70 C69 W89 W85 W91 W93 W94 R20 R64 W67 R12 R181 R183 W75 W64 D2 Q23 Q21 Q1 Q2 Q46 Q45 Q39 Q38 Q37 D29 D32 D30 D39 Q24 Q40 Q20 Q19 Q17 D33 Q18 Q32 Q29 D26 D25 D27 D28 D31 Q33 Q35 Q34 Q36 Q31 Q30 Q25 D21 D10
16、0 D24 Q22 Q26 D37 D23 D22 D38 D40 D35 D36 D34 Q44 D1 R11 R29 R30 C13 R73 R75 W11 W24 C20 C23 VR2 C16 C17 C24 C25 IC2 C18 IC1 R45 R48 R51 W9 W10 W12 C19 S2 .oN . f eR sserddA CIQ 1C3 2B3 3F2 4B6 1D3 2D4 3C4 4C4 5C4 6B4 7C4 8C4 9C3 01C3 11B4 21B5 31B3 41B2 51C4 61B4 71F2 81F2 91F2 02F2 12D3 22E3 32D3
17、42E3 52E3 62E3 72B6 82B6 92G2 03G2 13G2 23G2 33G4 43G5 53G4 63G6 73E6 83E6 93D5 04E3 14B6 44E4 54D5 64D5 2SA1123 2SA733(A) 2SA817A 2SA965 2SA992 2SC1627A 2SC1845 2SC2235 2SC2631 2SC945(A) EC B DTA124ESA BC E 2SC4137 EC B NJM4565D 1 4 5 8 UPC4574C 8 7 1 14 UPC494C UPC1237HA 1 8 ABCDEFGIH 1 2 3 4 5 6
18、7 1 1 3 2 5 6 7 11 22 9 8 10 3 3 2 3 R8 1k VR1 5k(A) VR2 50k(C) C15 0.047u R36 10 R41 5.6k 13 12 14 2 3 4 1 5 6 8 7 S1 11 C16 10u 50v C17 1u 50v C18 1u 50v C19 1u 50v C20 10u 50v C23 2.2u 50v S2 C25 10u 50v R61 4.7k C22 22u 50v R45 4.3k R51 4.3k C24 100p C21 0.22u R44 300 C11 1000p 50v R25 2.2k R26
19、2.2k R13 150 R11 5.6k R9 10k R12 5.6k R14 150 R28 30k R29 7.5k R30 12k R31 150k R32 120k R33 6.8k R35 10k R16 1k R10 10k R15 68 C12 15p C13 0.1u 50v C14 0.1u R37 10k R38 20k R40 36k R39 36k R43 24k R52 22k R175 100 R177 33k R176 75k R63 6.8k C31 10u50v R119 10 R115 22k 1/4w R79 100 1/4w (NB) R80 10
20、1/4w (NB) R81 10 1/4w (NB) R83 10 1/4w (NB) R82 10 1/4w (NB) R78 100 1/4w (NB) R93 10 1/2w R70 1k 1/2w C37 220u 50v C68 47u 25v C66 47u 25v C76 1u 50v R184 75k R182 33 R183 100k R161 13k R164 47k R163 910 R165 10k R167 10k R168 33k R162 180k C71 10u 50v C72 100u 10v C73 1u 50v C74 10u50v R181 180k R
21、178 16k R180 16k R73 150 R88 4.7 (NB) R86 4.7 (NB) R19 1.5k 2w R187 330k R84 220 1/2w (NB) R85 4.7 (NB) R89 0.1 2w R105 620 C61 4700p R106 620 R77 510 R102 1k C62 4700p C47 100p 50v C38 12p C40 1000p 50v C39 270p R67 2.2k R65 1k R62 47k R186 10k R47 4.3k C32 470p C34 47u 25v R90 0.1 2w R18 1.5k 2w R
22、20 1.5k 2w R92 0.1 2w R17 1.5k 2w R91 0.1 2w R169 1.2k 2w R193 1.2k 2w R103 1k R104 1k K1 R101 1k R87 4.7 (NB) R194 1k CN3 VR3 220 R171 100k R172 30k R174 10 C75 1u50v R111 2k 1/4w R113 2k 1/4w R117 10 C65 47u 25v R173 2.7k R170 33k R75 6.8k 1/4w R69 4.7k 1/4w C36 270p C35 15p C33 0.01u R64 100 R185
23、 150k R166 10k R21 51k R6 27k R1 1k R2 1k R4 10k R3 10k R7 15k R5 27k C3 10u 50v C2 1000p C1 1000p C5 100p R23 51k R157 2.2k R229 2.2k R228 2.2k R131 10 1/2w R132 10 1/2w C53 2200p C55 4700p 50v C56 3900p 16v R136 22 R137 22 R138 150 R139 150 IC1 IC2 IC3 IC4 :UPC4574C :NJM4565D :UPC494C :UPC1237HA Q
24、1,2,16,25,26,41 Q3,4 Q5 Q6 Q7,8 Q9,10 Q11,12 Q13,14 Q15,24,27,28 Q17,19 Q18,20,39,44 Q21,22,29,32,37,38,45 Q23,30,31,46 Q33-36 Q40 :2SA992(F,E) :2SC2631(Q,R) :2SA1123(Q,R) :2SC4137(V,W) :2SC2235 :2SA965 :2SC5101LB85 :2SA1909LB85 :2SC1845(F,E) :2SC1627A :2SA817A :2SC945(A)(Q,P) :2SA733(A)(Q,P) :IRFIZ
25、48NLF24 :DTA124ESA :1SS131 :RD20JS(B) :FML22S8A :IN5406-M :RD16JS(B2) :B30-1460-05 :FML22R8A :RD7.5JS(B) D1-4,6-23,27,28,32-34,37,38,40 D24 D25 D26 D29 D31 D35,36 D100 R143 470 R144 16k 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 C59 47u 25v C57 10u50v R142 10k C58 1000p 50v R133 10 1/2w R134 4.7k R140 1
26、.5k R141 1.5k R109 3.3k R110 3.3k R96 470 1/2w R95 10 1/2w C46 16v 1000u R155 10k R156 4.7k R107 10k R108 10k R158 4.7k R151 3.3k R152 3.3k 7.5v R153 3.3k C70 10u 50v C79 1000p C69 10u 50v R154 750 R226 10k R188 100k R227 10k J5 CN4 SIGMA+ - SERVO SP + SP - SIGMA SERVO L1 J4 J3 P-CON +B GND C63 1000
27、p C64 1000p C42 4700p C43 2200p C44 0.33u C77 0.1u R224 4.7 1/2w R225 4.7 1/2w FUSE C78 0.1u C45 0.33u R135 4.7k C54 2200p L2 C52 3300u 50v C51 3300u 50v R22 51k R24 51k C7 2.2u 50v C4 10u 50v C9 2.2u 50v C10 2.2u 50v C8 2.2u 50v CN2E2 J2 CN1 E1 J1 Lch 1 Rch 2 R+ R- L- L+ 12345678 TH1TH2R159 6.2k R1
28、60 1k 1/2w R66 1k R116 22k 1/4w R112 2k 1/4w R120 10 R179 47k R118 10 R114 2k 1/4w R68 47k C67 47u 25v R74 6.8k 1/4w R71 150 R72 150 C48 100p R76 1.8k R42 22k R46 3.6k R48 4.3k R49 1.1k R50 300 R34 4.7k R27 30k C6 15p 4 (X09-5320-10 A/3) (X09 B/3) RCA INPUT (X09 C/3) SPEAKER LEVEL INPUT IC1 1/4 IC1
29、2/4 IC1 3/4 IC1 4/4 IC2 1/2 IC2 2/2 Q26 Q17 Q19 Q5 Q8 Q12 Q11 Q16 Q13 Q14 Q9 Q4Q3 Q20 Q22 Q23 IC4 Q41 D40 D38 D25 Q36 Q35 Q33 Q34 Q32 IC3 Q27 Q28 Q39 D13 D18 D17 D19 D29 D30 Q38 Q37 Q45 Q46 D31 D20 D14 D15 D16 D32 D33 Q30 Q31 Q29 D28 D27 D26 Q40 D100 D34 Q18 D5 D36 D37 Q10 Q44 D7 D8 Q7 Q15 Q6 Q25 Q2
30、4 Q2 Q1 Q21 D1 D3 D4 D2 D23D22 D21 D35 D6 D9 D11 D10 D12 D24 TEMPERATURE COMPENSATION Q6 CLASS B INITIAL STAGE Q7-10 CLASS B FINAL Q11-14 CURRENT LIMITER Q15,16 AVR AVR AVR INPUT BUFFER LPF INFRASONIC FILTER ISOLATE IC1 PROTECTION IC CLASS A INPUT DIFFERENTIAL AMPLIFIER MID-V OVERLOAD-IN LATCH AC OF
31、F IN GND RELAY MUTE Vcc Q1,2 BASS BOAST IC2 TWO-STAGE DIFFERENTIAL AMPLIFIER CLASS A Q3,4 MUTING CIRCUIT Q21-23 ERRONEOUS CONNECTION PROTECTION CIRCUIT AGAINST Q24,25 CLASS A INITIAL STAGE CONSTANT-CURRENT CIRCUITQ26 S1 DC / DC CONVERTER DRIVE NI.IN I.IN FB DT CT RT GND C1 NI.IN I.IN R-OUT CONT. Vcc
32、 C2 E2 E1 Q29-32 DC/DC CONVERTER SWITCHING FET P-CON INPUT OVERCURRENT PROTECTION Q37 P-CON CONTROL Q38,39 DISPLAY LED DRIVE Q40 FINAL Tr. OVERCURRENT DETECTION CONTROL Q41 RELAY DRIVE DC/DC CONVERTER CONTROL IC IC3 Q33-Q36 Q44 ERRONEOUS CONNECTION PROTECTION CIRCUIT AGAINST Q27,28 CLASS A CURRENT M
33、IRROR CIRCUIT Q5 INPUT SENSITIVITY VR1 LPF FREQUENCY VR2 INFRASONIC OFF -15-25 BASS BOOST OFF- 6-12S2 0V 0V 15.5V -15.5V 0V 0V 0V 0V 0V0V 0V 0V 0V 0V 0V 0V 0V 0V 0.01V -5V 0.65V 0.075V 15.5V 43V 43.5V 1.1V 0.57V 0.12V 0.57V 0.54V 0.54V -0.56V -0.56V -0.6V -0.6V -0.13V -0.75V -43.5V -1.1V -2.1V -0.53
34、V -15.5V -43V -43V -45V 0V 45V 45V 2.1V 3.5V 14.3V 0.4V 14.4V 14.4V 14.4V 0V 3V 0.2V 1.7V 0V 3.7V 13.5V 5V 5V 13.5V 13.5V 5V 5V 5V 0V 0V 0V 0V 1.5V 0V -1.1V KAC-719 CAUTION:For continued safety, replace safety critical components only with manufacturers recommended parts (refer to, parts list). Indi
35、cates safety critical components. To reduce the risk of electric shock, leakage- current or resistance measurements shall be carried out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer. DC voltages are as measured with a high impedanc
36、e voltmeter. Values may vary slightly due to variations between individual instruments or/and units. KAC-719 7 AB 1 2 3 EXPLODED VIEW (UNIT) Parts with exploded numbers larger than 700 are not suppied. KAC-719 PARTS LIST 8 Ref.No.Parts No.Description A d d A d d N e w Dest inati on Ref.No.Parts No.D
37、escription A d d A d d N e w Dest inati on New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohane Parts No. werden nicht geliefert. E: Europe K: North America M: Other Areas W: Without Europeindicates safety critical compone
38、nts. 13B A21-4014-03DRESSING PANEL 32A A64-1977-02PANEL 41B A84-0235-02REAR PANEL 52BB19-1185-03LIGHTING BOARD -B46-0100-50WARRANTY CARD - B64-1521-00INST.MANUAL (ENG.FRE.SPA.)K - B64-1522-00INST.MANUAL (ENG.FRE.GER.DUT.)E - B64-1522-00INST.MANUAL (ITA.SPA.POR.)E - B64-1523-00INST.MANUAL (ENGLISH,CH
39、INESE)M 73B F01-1627-01HEAT SINK F11B F52-0015-05FUSE(BLADE TYPE) -H10-4642-03POLYSTYRENE FOAMED FIXTURE -H25-0321-04PROTECTION BAG (600X315X0.03) -H25-0336-04PROTECTION BAG (170X250X0.03) - H54-1595-03ITEM CARTON CASE 82BJ30-1066-04SPACER 91AN99-1587-05SCREW SET A1BN89-3006-45BINDING HEAD TAPTITE S
40、CREW B1BN89-3006-46BINDING HEAD TAPTITE SCREW C2BN87-3012-46BRAZIER HEAD TAPTITE SCREW D2B N09-4382-05TAPTITE SCREW(2.6X10) F2AN80-3010-45PAN HEAD TAPTITE SCREW G3AN15-1040-46FLAT WASHER (4) H3AN09-4026-05TAPPING SCREW(4X8,TP,S) N3AN09-4157-05SEMS (TAPTITE SCREW) P3BN09-4320-05DRESSED SCREW(M4X10) 1
41、01AW01-0797-05ACCESSORYE 111A W01-1515-05ACCESSORY D100B30-1460-05LED(RED) C1,2CK45FB1H102KCERAMIC1000PFK C3,4CE04DW1H100MELECTRO10UF50WV C5CC45FSL1H101JCERAMIC100PFJ C6CC45FCH1H150JCERAMIC15PFJ C7-10CE04DW1H2R2MELECTRO2.2UF 50WV C11CF92FV1H102JMF-C1000PFJ C12CC45FCH1H150JCERAMIC15PFJ C13 ,14CF92FV1
42、H104JMF-C0.10UFJ C15CF92FV1H473JMF-C0.047UF J C16CE04DW1H100MELECTRO10UF50WV C17 -19CE04DW1H010MELECTRO1.0UF50WV C20CE04DW1H100MELECTRO10UF50WV C21CF92FV1H224JMF-C0.22UFJ C22CE04DW1H220MELECTRO22UF50WV C23CE04DW1H2R2MELECTRO2.2UF50WV C24CC45FSL1H101JCERAMIC100PFJ C25CE04DW1H100MELECTRO10UF50WV C31CE
43、04DW1H100MELECTRO10UF50WV C32CK45FB1H471KCERAMIC470PFK C33CF92FV1H103JMF-C0.010UF J AUDIO UNIT (X09-5320-10) TEST KAC-719 AUDIO UNIT (X09-5320-10) C34CE04DW1E470MELECTRO47UF25WV C35CC45FSL1H150JCERAMIC15PFJ C36CC45FSL1H271JCERAMIC270PFJ C37CE04DW1H221MELECTRO220UF 50WV C38CC45FSL1H120JCERAMIC12PFJ C
44、39CC45FSL1H271JCERAMIC270PFJ C40CF92FV1H102JMF-C1000PFJ C42CF92FV1H472JMF-C4700PFJ C43CF92FV1H222JMF-C2200PFJ C44 ,45CF92FV1H334JMF-C0.33UFJ C46C90-1630-05NP-ELEC1000UF16WV C47 ,48CC45FSL1H101JCERAMIC100PFJ C51 ,52 C90-5305-05ELECTRO3300UF50WV C53 ,54CF92FV1H222JMF-C2200PFJ C55CF92FV1H472JMF-C4700PF
45、J C56C90-2921-05ELECTRO3900UF16WV C57CE04DW1H100MELECTRO10UF50WV C58CF92FV1H102JMF-C1000PFJ C59CE04DW1E470MELECTRO47UF25WV C61 ,62CF92FV1H472JMF-C4700PFJ C63 ,64CF92FV1H102JMF-C1000PFJ C65 -68CE04DW1E470MELECTRO47UF25WV C69 -71CE04DW1H100MELECTRO10UF50WV C72CE04DW1A101MELECTRO100UF10WV C73CE04DW1H01
46、0MELECTRO1.0UF50WV C74CE04DW1H100MELECTRO10UF50WV C75 ,76CE04DW1H010MELECTRO1.0UF50WV C77 ,78CF92FV1H104JMF-C0.10UFJ CN1 ,2E40-4294-05FLAT CABLE CONNECTOR CN3E40-3640-05PIN ASSY J1E63-0834-05PIN JACK J2E70-0824-05SCREW TERMINAL BOARD J3E70-0820-05SCREW TERMINAL BOARD J4E70-0818-05SCREW TERMINAL BOAR
47、D J5E70-0808-05SCREW TERMINAL BOARD -F09-1206-04SHEET CN4J13-0601-05FUSE HOLDER L1L33-1015-05CHOKE COIL L2 L19-0587-05TRANSFORMER FOR CONVERTER E1B N80-2608-45PAN HEAD TAPTITE SCREW F1B N80-3010-45PAN HEAD TAPTITE SCREW J2A N07-0002-08SCREW K2B N09-4214-08SCREW M2B N07-0003-08SCREW R17 -20RS14KB3D15
48、2JFL-PROOF RS1.5KJ2W R70RD14DB2H102JSMALL-RD1.0KJ1/2W R78 ,79RD14NB2E101JRD100J1/4W R80 -83RD14NB2E100JRD10J1/4W R84RD14NB2E221JRD220J1/4W R85 -88RD14NB2E4R7JRD4.7J1/4W R89 -92R92-0205-05METAL-PLATE0.1K2W R93RD14DB2H100JSMALL-RD10J1/2W KAC-719 PARTS LIST 9 Ref.No.Parts No.Description A d d A d d N e
49、 w Dest inati on Ref.No.Parts No.Description A d d A d d N e w Dest inati on New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohane Parts No. werden nicht geliefert. indicates safety critical components. E: Europe K: North America M: Other Areas W: Without Europe AUDIO UNIT (X09-5320-10) R95RD14DB2H100JSMALL-RD10J1/2W R96RD14DB2H471JSMALL-RD470J1/2W R131-133RD14DB2H100JSMALL-RD10J1/2W R160RD14DB2H102JSMALL-RD1.0KJ1/2W R169RS14KB3D122JFL-PROOF RS1.2K