Kenwood-XSG7-tape-sm 电路图 维修手册.pdf

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1、STEREO AUTO REVERSE CASSETTE DECK X-SG7/SG7G SERVICE MANUAL 1999-6/B51-5546-00 (K/K) 2299 70% SYSTEM CONTROL REC IN PLAY OUT LR Phono jack (E63-0046-15) Metallic cabinet (A01-3360-01) Rectangular receptacle (E08-0311-05) Power cord bushing (J42-0083-05) AC power cord * (E30-) Refer to X-E9 and X-SA7

2、 service manuals (B51-4926-00/B51-5214-00), if you require in detail. rev. mode Dolby NRCRLSBC ?1 0 2 7 3 ? 8 ”? stereo auto reverse cassette deck on/standby front loading mechanism Panel * (A29-) Panel * (A60-) Knob (K29-6741-04) Indicator (B12-0319-13) Knob (K29-7572-13) * Refer to parts list on p

3、age13. RadioFans.CN 收音机爱 好者资料库 X-SG7/SG7G 2 ACCESSORIES LED ITEM POWERDOLBY BDOLBY C RVS MODE UNDER ADJUSTMENT PB CALIB ERR L R PB LEVEL ERR L R REC CALIB ERR L R REC LEBEL ERR L R BIAS DAC ERR L R PB ALL OK ALL OK DISASSEMBLY FOR REPAIR CIRCUIT DESCRIPTION Power does not turn on and tray does not c

4、ome out. 1. Turn the pully in the direction of the arrow in the draw- ing with a finger (1). 2. If the tray comes out to the front side, pull out the tray by hand forward the front (2). Audio cord (2) (E30-0615-05) System control cord (1) (E30-2628-05) 8 Correction of circuit description LED indicat

5、ion state. Operation to reset The microcomputer may fall into malfunction (impossibility to operate, erroneous display, etc.) when the power cord is unplugged while power is ON or due to an external factor. In this case, execute the following procedure to reset the microcomputer and return it to nor

6、mal con- dition. Unplug the power cord from the power out- let and, while holding the stop key de- pressed, plug the power cord again. ?Please note that resetting the microcomputer clears the contents stored in it returns it to con- dition when it left the factory. RadioFans.CN 收音机爱 好者资料库 X-SG7/SG7G

7、 ADJUSTMENT 3 AC voltmeterAC voltmeter Oscilloscope Distortion meter AG SYSTEM CONTROL REC IN PLAY OUT LR KSJ-0816 OrderItem Input setting Output setting Deck setting Adjustment pointsAdjustment methodFig. Unless otherwise specified, set the respective switches as follow : TAPE : NORMAL DOLBY : OFF

8、INPUT : REC IN OUTPUT : PLAY OUT I. Cassette mechanism section (Recording/play head adjustment) Demagnetization and cleaning Power : OFF Demagnetization, cleaning, PLAY Recording head, erase head, capstan, pinch roller Demagnetize the REC/ PLAY head with the head eraser. Clean the REC/PLAY head, era

9、se head, capstan and pinch roller using a cotton swab slightly damped with alcohol. Azimuth of the REC/PLAY head TCC-153 MTT-114 10KHz, -10dB LINE OUT (Lch or Rch) PLAY Adjust the output to maximum and adjust the azimuth adjustment screw for the Lissajous waveform pattern of the oscilloscope to beco

10、me close to a 45 straight line. II. Printed circuit board adjustment (X28-297) (1) Tape speed (normal) TCC-110 MTT-111 3KHz (A)PLAYMOTOR VR. Adjust so ; that the frequency is 3KHz at the tape center. (2)Playback level TCC-130 400 Hz (A) MANUAL ADJUSTMENT MODE PLAY ADJUSTMENT VALUE UP : DOLBY KEY DOW

11、N : RVS PLAY KEY CHANGE OF ADJUSTMENT MODE CRLS KEY Output level : -1dBs (3)Bias current TCC-108A 12.5KHz, -21dBm (A) MANUAL TEST MODE REC and PLAY -21dBm (4)Recording level TCC-108A 400Hz, -21dBm (A) MANUAL TEST MODE REC and PLAY -21dBm RVSFWD The method of the manual adjust- ment mode. (1) Setting

12、 Shorting the TEST pin of (X28- )(A/5) TP5 w TP4 with the diode, plug the power cord to the AC wall let. (2) Refer to manual adjustment mode(3-3), if require more details. (A) Measurement Equipment Connection G RadioFans.CN 收音机爱 好者资料库 ACEGIBDFHJ 2 1 3 5 7 4 6 EB 1 6441 24 80 6540 25 1 110 16 13 BE 1

13、 3 1 10 1 3 9 1 1 1 1 1 112 10 1 10 15 5 12 1810 BE B B B B BE BE E E E E 19 E E B B 151101 I BE BEBE G O REC IN PLAY OUT SYSTEM CONTROL AC OUTLET EB E B EB E E B E E B B B BE BE BEBE E B EB EB EB EB E B E B EB E E E E B B B B Refer to the schematic diagram for the value of resistors and capacitors.

14、 PC BOARD (Component side view) 45 LMNOABDFHCEGIJK 2 1 3 5 7 4 6 REC: 5.0V OTHER: 0V PLAY,REC, REC PAUSE: 5.0V OTHER: 0V 5.1V 5.1V 4.7V 4.8V 5.1V 11.3V 0.6V 5.7V 6.1V 12.3V 12.9V 4.7V 5.1V 0V 4.8V 0V 0V 0.6V 1.3V 1.3V 3.2V 3.5V 1.3V 1.3V 1.3V 1.3V 1.3V 1.3V NORMAL:2.0V METAL/CRO2:3.3V STOP:4.4V PLAY

15、/REC:0V REC: 0V OTHER: 4.3V 1.2V 6.4V REC:0V 6.4V 6.5V 1.7V 1.7V 6.5V 6.5V 6.5V6.5V 6.3V 12.9V 6.5V 6.2V 6.4V 7.0V 7.0V 6.2V 6.2V 7.0V 6.4V 6.5V 6.5V 6.5V 6.5V 6.5V 1.7V 1.7V 6.5V 6.4V REC:0V 6.4V DOLBY OFF:0V DOLBY ON:5.0V DOLBY B:0V DOLBY C:5.0V PLAY:0V REC:5.0V OTHER:4.3V REC:0V CRO2/METAL:5.0V N

16、ORMAL:0V 25.8V 5.1V 12.6V 12.9V REC:4.8V REC:0V 7.9V 7.3V 12.9V 9.8V 3.7V 1.3V 0.7V 3.7V 0.7V 1.3V PLAY:12.9V REC:0V PLAY:0V REC:5.0V REC:4.4V PLAY:0V 0.5V 0.8V 7.3V 0.6V 0.5V 0.8V 12.3V 12.3V 5.0V 11.6V 12.2V PIN 1 2 3 4 5 6 7 8 918 17 16 15 14 13 11 12 10 PINNORMAL CRO2 METALMETAL CRO2 NORMAL 1.9V

17、 4.4V 3.2V 4.4V 2.4V 1.9V 2.6V4.1V 3.2V 3.6V 12.9V 0V12.9V 1.8V2.9V 4.38V 2.3V3.4V 1.7V2.9V 2.64V4.1V 12.9V 1.69V MODE:RECORDING IC8 VOLTAGE 7.0V 10u16 C229 + C239 1u50 + 22u16 C209 + C210 22u16 + 10u16 C233 + 10u16 C232 + 22u16 C234 + C238 100u16 + 47u16 C21 + C214 1u50 + 1u50 C114 + C122 0.1u50 +

18、C124 0.1u50 + C126 10u16 + C130 0.1u50 + C132 2.2u50 + C131 2.2u50 C125 10u16 C121 0.1u50 + 1u50 C113 + C123 0.1u50 + C129 0.1u50 + + + + + + () () () () () () () () () )( () )( () () )( )( )( )( )( )( )( C158 22u35 + () () () () () () () () () ( ( ) ) )( )( )( )( () () () () () () () () () () () ()

19、 () () () 1u50 C23 + 1u50 C24 + C14 1u50 + 10u16 C8 + C9 100u10 + 100u16 C5 + )( )( )( () )( )( )( )( () )( () )( () )( () () () () () () () () () () () )( () )( 18 17 16 15 14 13 12 10 PROTECTION CIRCUIT THARMAL DETECTING POWER SOURCE STABILIZING +15V DET. ABSO. DET. PEAK DET. ABSO. 1 2 3 DET. PEAK

20、 4 VCA 11 DRIVER PRE 7 VCA COMPARATOR 5 6 GND 8 9 0.022 C225 220K R219 0.01 C221 0.022 C227 R221 33K C223 560P 33K C228 0.022 0.022 C226 C222 0.01 220K R220 C224 560P R222 C230 10P 1 2 3 4 5 6 4 1 2 3 HX L4 150P C218 220P C220 16 220P 4 C219 3 2 L3 EH C217 150P EH 4 6 L9 3 1 25 C231 0.01 0.01 C237 2

21、2K R226 10 1/4W R224 10 R223 1/4W 5600P C236 R225 22K C235 5600P 68 R233 4.7K R235 K1 150K R207 390P C205 10u16 C203 + R205 160 R203 0.022 C207 6.2K 1 2 4 3 5 160 R2046.2K R206 150K R208 390P C206 7 8 9 6 0.022 C208 10u16 C204 + C201 680P R201 150K C202 680P R202 150K Q31,32 10mH L7 220P C215 15K R2

22、11 15K R212 10mH 220P C216 L8 Q44 10K R214 10K R213 1K R229 10 R230 22K R227 10 R234 R228 5.6K 1/4W 1/4W 109876543211112 R218 1K R217 1K R216 10K R215 10K 3.3K R231 1K R232 Q47,48 121189107654132 PLAY/REC PLAY Lch GND PLAY Rch REC Lch REC Rch BIAS Rch BIAS Lch BIAS ERASE EH GND 13V 1 2 3 4 5 6 GND 1

23、 OUT1 2 Vz1 3 Vref 4 Fin 5 Rin 6 Vcc1 7 Vcc2 8 Vz2 9 OUT2 10 C20 0.1 10 R45 C18 0.1 R44 1K R42 1K R43 1K 1/4W 123 45 R109 3.9K C107 6800P NC L1MPX 1.5K R107 R158 18K 56 E. VOL E. VOL 71 1 80 VREF 77 78 79 1A 3 2 5 4 REF VR3 VR2 74 75 76 VR1 GND 72 73 DAC SBIT 67 GND VR1 68 69 70 VR2 VR3 BIAS65 66 DA

24、C SBIT 64 63 1A VREF 60 62 61 58 59 57 REC OUT 8 7 6 10 9 B/C NR DOLBY 12 11 IREF 13 14 VOL RECT EQ LMA + SBIT DAC EQ REC EQ-CONTROLER NN NC 17 16 15 NM HN HC 20 19 18 21HM 22 23 24GH GL GP DAC SBIT 25 26 27FM FQ F/Q 28 29 30 BIAS VCC + LMA DAC SBIT REC OUT B/C NR DOLBY 54 55 51 52 53 RECT EQ RECVOL

25、 EQ 49 50 47 48 ADJ. BIAS DAC SBIT 31 32 VCC BIAS 33 34 35 36 GND N M CONT RESET MPX SW C/B ON/OFF 44 45 46 43 42 37 38 C 39 40 41 LOGIC ILL C103 10u16 + 1u50 C105 + R103 33K 1u50 C143 + + 1u50 C154 + C104 10u16 +C106 1u50 + C144 1u50 1.5K R108 6800P C108 321 4 R110 5 L2 NC MPX 3.9K 39K R105 39K R10

26、6 R104 33K C213 1u50 + 3300P C211 3300P C212 1.5K 1.5K C118 2200P C116 2200P 22K R114 0.033 C112 220P R112 2.2K 10mH L6 R116 560 C110 C120 2200P R126 10K R130 R128 4.7K C134 1u50 + R159 24K C136 2.2u50 22K R120 4.7K R118 2.2u50 C128 + 1.1K R122 R124 1K R145 120K R139 47K GP R140R146 51K36K GL R141R1

27、47 56K30K GH R142R148 68K56K F/Q R143R149 43K56K FQ R144R150 220K220K FM NC NN R127 4.7K C133 1u50 R125 10K C119 2200P C115 2200P C117 2200P R115 560 C127R121 4.7K R117R119 22K 1.1K2.2u50 + C111 C109 0.033 220P R123 1K 47K 22K R113 R111 2.2K 10mH L5 C155 1u50 C156 1u50 C157 1u50 2.2u50 C135 + C141 1

28、8P C138 1u50 + R132 100K C137 1u50 + R131 100K R151 100K R152 62K R157 3.9K C139 18P R154 5.6K R153 5.6K C140 56P R155 5.6K C142 100P R156 1K 29 32 39 40 41 42 46 50 3300P R161 6.2K 0.1 12K 1.2K R163 C146 R162 C145 47K R160 120K R164 22K 1 2 3 4 5 6 7 8 9 10 15 14 13 12 11 R210 R209 1 2 3 4 5 6 7 8

29、9 10 1 3 4 14 13 50 46 42 41 40 39 32 29 6 3 1 2 5 4 6 8 7 10 9 2 1 3 4 5 8 7 9 11 10 13 12 14 15 REC. R MUTE +B BIAS. R 13V BIAS. L CLK DATA ST RESET REC. L LEV. L 5V S. BUSY S. DATA D. GND A. GND PLAY. R 120/70 400/12.5k PLAY. L OSC ATT OSC LINE MUTE REC MUTE LEV. R 220P C102 220P C101 100 R102 10

30、0 R101 220P220P C150C149 1.2K R133 4.7K R137 4.7K R138 1.2K R134 R136 56K R135 56K 0.01 C148 100K R168 100K R167 220P C152 220P C151 R169 56K R166 10K R165 10K 13 14 1 4 3 REC MUTE LINE MUTE 1 2 3 4 5 6 7 8 9 10 13 11 12 47K R7 4.7K R8 3.3K R10 47K R9 40 41 R6 100 R5 100 R3 100 R1 100 47K R54 R2 100

31、 100 R41 R40 100 65 64 67 66 CLOSE SOL 64 OPEN CASS. SW Fin R. INH A Rin READ AVSS CE TEX NC TX NC 73 VSS VDD 72 A 33 71 34 70 35 69 36 68 37 67 38 66 39 65 40 DATA 63 CLK 62 PH SW 61 NC 60 OSC OUT 59 NC 58 GND 57 GND 56 GND 55 GND 54 NC 53 STB 52 DATA 51 PLAY/REC 50 BIAS 49 CLK SYSTEM IC 48 ERASE 4

32、7 PLAY SW 46 LEVEL. R 45 LEVEL. L 44 R. INH B 43 I/I 42 CPM 41 E2 PROM SYSTEM IC 65 66 67 R39 10K 41 R55 47K 42 43 44 45 46 47 48 49 50 51 52 R56 47K R53 47K R51 47K 40 38 39 59 R59 10K 15K R52 1u50 C13 + R38 100K 10K R37 1K R46 0.022 C27 1K R27 1.5K R26 GND OUT IN R22 100 1/4W + 10u16 C4 4 VSSDATA

33、A2 3 CLK A0 A1 2 VCC NC 1 5 6 7 8 C12 0.01 R35 22K R33 1K 22K R34 R29 100K 330 R32 330 R31 R30 100K GND S.DATA S.BUSY S.GND 78 77 76 59 75 74 45 44 52 51 48 61 62 63 47K R58 47K R57 64 43 42 46 61 38 39 50 49 47 63 R36 1K 62 1 80 REC F HALL OUT SOL HALF GND 12V MOTOR + MOTOR COM MODE CrO2 METAL REC

34、R OPEN CLOSE COM MOTOR MOTOR + EH Lch Rch GND EH GND +ERASE (BRN) +E (BRN) -E (BLU) +R (GRN) -L (ORG) +L (RED) Lch Rch +12V GND (BLU) -ERASE -Rch (YEL) +Rch (GRN) (RED) +Lch -Lch (ORG) EARTH (WHT) -R (YEL) GND (WHT) 1 2 3 4 5 EH EH GND Rch Lch GND 1 2 3 4 5 6 7 8 9 10 13 11 12 2 1 Rch Lch 6 5 4 3 CL

35、OSE OPEN COM MOTOR -(CCW) MOTOR +(CW) FEW REC HALL OUT SOL HALF GND 12V MOTOR +(CW) MOTOR (CCW) COM MODE CrO2 METAL REV REC 1.2K 1W R173 1.2K 1W R172 R171 1.2K 1W R129 C147 + 100u16 47K R48 0.01 C10 C19 0.01 DOLBY HX PRO ERASE OSC Q45 Q46 D33 Q44 Q33 Q31 Q32 IC7 (1/2) (2/2) IC7 PLAY MUTE PB EQ RELAY

36、 SELECT. PLAY/REC D32 Q41 Q43 Q42 EH CONT. Q48Q47 CONT. BIAS CN12 CN11 CN5 D18D20 CN6 Q24 Q23 Q27 Q28 Q29 Q30 1 2 3 4 Lch Rch REC PLAY Rch Lch Q21 Q22 MUTE D24 D23 Q25 Q26 D22 D10 D21 J2 J3 CPM CONT. Q6 Q8 CONT. SOLENOID Q7 Q9 D8D9 Q11 Q12 Q10 RESET D17 Q3 D4D19 u-COM 5V AVR RESET D2D3 Q5 13V AVR E2

37、ROM D12 D11 D13 D14D16 D15 SYSTEM CONTROL CN10CN4 MOTOR DRIVE CN2 CN3CN9 Lch ERASE HEAD R/P HEAD Rch PHOTO REFLECTOR MOTOR S6 S5 S4 S3 S2 S1 SOL TRAY MOTOR S8 S7 Lch Rch (BOTTOM VIEW) IC8 (X28-2972-71) (C/5) IC6 IC1 IC3 IC4 (X28- ) (B/5) (X28 ) (A/5) R/P/E HEADHEAD PCB MECHANISM (D401574 15) IC2 R25

38、4 1K CAUTION: For continued safety, replace safety critical components only with manufacturers recommended parts (refer to parts list). indicates safety critical components. For continued protection against risk of fire, replace only with same type and rating fuse(s). To reduce the risk of electric

39、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. The DC voltage is an actual reading measured with a high impedance type voltmeter with a cassette loaded at playba

40、ck mode. The measurement value may vary depending on the measuring instruments used or on the product. Bias circuit DC voltage is measured while in the record mode. DOLBY and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. Noise reduction circuit made under license fr

41、om Dolby Laboratories Licensing Corporation. X-SG7/SG7G Y26-4450-21 QPRST AC22.0V 25.5V 12.3V 12.9V 14.0V 13.5V 25.8V 26.0V 5.1V )( )( )( )( )( )( () ( ( ) ) )( () () () () () () () C6 10u16 + C7 47u16 + 1000u35 C11 + 1000u35 C1 + 1u50 C22 + )( )( )( )( () )( )( () )( )( () )( )( )( )( )( )( )( )( )

42、( )( )( KS0 KS1 KS2 KS3 80 25 S. BUSY 1 79 26 78 27 77 28 76 29 75 30 74 31 32 XTAL EXTAL R. MUTE RST L. MUTE NC OSC ATT NC 400/12.5k NC 120/70 NC CR F/S NC S. DATA 2 TEST 2 3 A. ADJ 4 M. ADJ 5 TEST 1 6 KS0 7 KS1 8 KS3 9 KS2 10 NC 11 NC 12 NC 13 NC 14 KR2 15 KR0 16 KR1 17 NC 18 LED2 19 LED0 20 LED1

43、21 NC 22 NC 23 NC 24 NC 74 75 76 77 78 C17 0.01 10MHz X1 R61 47K R60 47K R62 47K 1 2 3 4 5 6 7 8 9 10 20 19 18 15 14 16 18 20 19 16 15 14 R63 47K R64 47K R65 47K R66 47K 3 4 5 6 7 Q1316 0.01 C15 0.01 C16 680 2W R24 4.7 R23 1.8 1/4W 47u16 C3 + C2 R21 10K 2.7 1/4W R20 10K R19 1000P 1 2 3 1 3 2 + 5.6K

44、R25 5.6K R28 0.01 C25 1 2 T1 3 4 10 5 150 R251 150 R252 R253 150 7 LED G2 1 LED G1 2 LED G0 8 KR2 9 KR1 KR0 6 1 2 3 4 5 6 7 9 8 10 1 LED G1 2 LED G0 3 KS0 4 KS1 5 KS3 6 KR0 7 LED G2 8 KR2 9 KR1 10 KS2 80 1 1/4W 1/4W P1 RECORDING LINE GND LINE SIGNAL LINE 22 R47 1/4W R67 D66 REC D62 PAUSE D67 D63 DOL

45、BY C D68 D64 RVS MODE DOLBY BCRLS S9D49 S5D45 S10D50 S6D46 S1D41S2D42 D51 S7D47 S12D52 S8D48 S3D43S4D44 Q13 KS03 DRIVE Q14 Q16 Q15 TEST MODE Q2 12V AVR Q1 Q4 D7 D5 D1 D6 E1E2 WH3 CN1 AC IN FWD RVS STOP FF REW PAUSE REC DOLBY NR CRLS ON/STANDBY OPEN/CLOSE RVS MODE S11 CN7 WH4 E3 230V 50Hz (X28- ) (D/

46、5) (X28 ) (E/5) X-SG7(E) (X28 ) (A/5) D65 D61 D69 ON/STANDBY (RED) (RED) RVS PLAY (GRN) FWD PLAY (GRN) Q45,46 Q44 Q41 Q33 Q31,32 Q25,26 Q23,24 Q21,22 Q1316 Q8,9,11,12,27,28,30,42,43,47,48 Q7 Q6 Q4,5,10,29 Q3 Q1,2 IC8 IC7 IC6 IC4 IC3 IC2 IC1 D61,65 D32 D21 D18 D1117 D8,9,33 D57,10,19,20,2224,4152 D4

47、D2,3 D1 : 2SC2785(F,E) or 2SC1740S(Q,R) : DTC124ESA or UN4212 : 2SC3940A(R,S) or 2SD863(E,F) : DTA124ESA or UN4112 : DTC143TSA or UN4216 : DTA124EUA or UN5112 : 2SD1302(S,T) : 2SD2114K : UN5119 : DTC124EUA or UN5212 : 2SA1286T11 : 2SA1534A(R,S) : 2SC4081 : 2SC3246 : 2SD2061(E,F) or 2SD2012 : UPC1297

48、CA : TA8125S : BA6209 : BR24C01A : PST993DT : HA12167FB : CXP84124144Q : B302522-05 D6264,6669: B302513-05 : HZS8.2N(B2) or MTZJ8.2(B) : HZS4.7N(B2) or MTZJ4.7(B) : HZS6.8N(B2) or MTZJ6.8(B) : MA111 : 1SS131 or HSS104A : 1SS133 or HSS104 : HZS5.1N(B2) or MTZJ5.1(B) : HZS6.2N(B2) or MTZJ6.2(B) : KBP0

49、2ML-6127 DTA124ESA DTC124ESA DTC143TSA UN4112 2SC1740S UN5119 2SD2114K 2SD2061UN4212 UN4216 2SD2012 2SC4081 DTA124EUA DTC124EUA BA6209UPC1297CAHA12167FB TA8125S UN5212 2SA1286-T11 2SA1534A 2SC3246 2SC3940A 2SD1302 2SD863 2SC2785 434 414 401 436 CG LM 417 426 426 412 411 409 436 424 408 407 425 431 432 402 420 CBx2 CEx5 CIx2 CHx2 CFx2 CD CC CA CBx2 CA 405 430 410 406 813 434 414 401 436 CG LM 417 426 426 412 411 409 436 424 408 407 425 431 432 402 420 CBx2 CEx5 CIx2 CHx2 CFx2 CD CC CA CBx2 CA 405 430 410 406 8