Kenwood-CT2050-tape-sm 电路图 维修手册.pdf

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1、RECPLAY LINEINLINEOUT R L SYSTEM CONTROL AC220- 240V AC110- 120V POWER TAPE B 18 PAUSE REC/ARM STEREO DUBLE CASSETTE DECK KX-W6080 AUTO REVERSE REC LEVEL /BAL. / BIAS MAX/RMIN/LMODE REC OFF PLAY TIMER RESET BAUTO BIASCCRSMPX FILTERNORM.-DUBB.-HIGH TAPE A 0 18 PAUSE REC/ARM AUTO REVERSE 11 RELAY RECR

2、EV.MODEDOLBY NRRESET A PHONES-ON OFF 0 FORWARDSTOPREVERSEFORWARDSTOPREVERSE KENWOOD badge (B43-0302-04) Front glass (B10-2486-04) Knob (K29-6935-04) Knob (K29-2936-04) Panel* (A60-) Phono jack (E63-0136-15) Miniature phone jack (E11-0188-05) AC power cord* (E30-) Foot* (J02-) Power cord bushing (J42

3、-0083-05) Cassette lid L* (A53-) Knob* (K29-) Knob* (K29-) Knob* (K29-) Knob* (K29-) Knob (BUTTON)* (K27-) Phono jack (E11-0292-05) Slide switch (S31-1036-05) Front glass (B10-2450-03) Knob (K29-5828-04) Front glass (B10-2486-04) Cassette lid R* (A53-) PRECAUTIONS FOR REPAIR Refer to KX-W4070/W6070

4、service manual(B51-5031-00), if you want to know more information of CIRCUIT DESCRIPTION. Illustration is KXF-W6010. * Refer to parts list on page 18. STEREO DOUBLE CASSETTE DECK CT-203/KXF-W4010/KXF-W4010E CT-2050/KXF-W6010/KXF-W6010E SERVICE MANUAL 1998-2/B51-5413-00 (K/K) 3430 CT-203/KXF-4010(K)

5、COVER( 98.4.25 0:05 PM yW 2 RadioFans.CN 收音机爱 好者资料库 CT-203/2050/KXF-W4010/W6010 2 CONTENTS / ACCESSORIES / CAUTIONS CONTENTS / ACCESSORIES / CAUTIONS. 2 CONTROLS . 3 ADJUSTMENT. 5 PC BOARD . 7 SCHEMATIC DIAGRAM . 9 EXPLODED VIEW . 16 PARTS LIST. 18 SPECIFICATIONS . 23 Beware of condensation When wat

6、er vapor comes into contact with the surface of cold material, water drops are produced. If condensation occurs, cor- rect operation may not be possible, or the unit may not function correctly. This is not a malfunction, however, and the unit should be dried. (To do this, turn the POWER switch ON an

7、d leave the unit for several hours.) Be especially careful in the following conditions: GWhen the unit is brought from a cold place to a warm place, and there is a large temperature difference. GWhen a heater starts operating. GWhen the unit is brought from an air-conditioned place to a place of hig

8、h temperature with high humidity. GWhen there is a large difference between the internal tempera- ture of the unit and the ambient temperature, or in conditions where condensation occurs easily. Cautions Operation to reset The microcomputer may fail into malfunction (impossibility to oper- ate. erro

9、neous display, etc.) When the power cord is unplugged while this unit is ON or due to an external factor. In this case, exe- cute the following method to reset the microcomputer and return it to normal condition. Turn the power switch on and off again while pressing the stop (7)key on desk B. Please

10、 note that resetting microcomputer clears contentsstroed in and returns it to the condition when it left the factory. Contents Audio cord.2 (E30-0505-05) System control cord.1 (E30-2816-05) Except for U.S.A., Mexico, Canada, U.K., Europe and Australia AC plug adaptor.1 (E03-0115-05) Note : CT-203 an

11、d CT-2050 is for USA and Canada market. Accessories CT-203/KXF-4010(K) COVER( 98.4.25 0:05 PM yW 3 RadioFans.CN 收音机爱 好者资料库 CT-203/2050/KXF-W4010/W6010 3 POWER TAPE B 18 PAUSE REC/ARM STEREO DUBLE CASSETTE DECK KX-W6080 AUTO REVERSE REC LEVEL /BAL. / BIAS MAX/RMIN/LMODE REC OFF PLAY TIMER RESET BAUTO

12、 BIASCCRSMPX FILTERNORM.-DUBB.-HIGH TAPE A 0 18 PAUSE REC/ARM AUTO REVERSE 11 RELAY RECREV.MODEDOLBY NRRESET A PHONES-ON OFF 0 FORWARDSTOPREVERSEFORWARDSTOPREVERSE Deck A: Playback and Recording (KXF-W4010: Playback only) Deck B: Playback and Recording Eject button 0Eject button 0 Operation key sect

13、ion Display PAUSE key REC/ARM key 8 8 8 Fast reverse key Fast forward key POWER switch PHONES jack PAUSE key REC/ARM key Fast reverse key Fast forward key REC LEVEL/BAL. (BALANCE)/BIAS control knob (KXF-W4010: REC LEVEL/BAL.only) MODE key TIMER switch 1 1 HIGH DUBBING HIGH DUBBING key NORMAL DUBBING

14、 key NORMAL DUBBING This Illustration shows the KXF-W6010 model. Operation Indicators (Deck A) Transport direction Recording indicator (KXF-W6010 only) Pause indicator (KXF-W6010 only) 2, 3 8 Operation Indicators (Deck B) Transport direction Recording indicator Pause indicator 2, 3 REV.MODE indicato

15、rs Peak level indicators (Dolby NR reference level) CCRS indicators MPX indicator BAL.BIAS LEVEL indicators (KXF-W4010: BAL.,LEVEL only) Deck B counter AUTO BIAS indicator DOLBY NR indicators DUBBING indicators NORMAL HIGH RELAY indicator Deck A counter DUBBING NORMAL HIGH DOLBY NRAUTO BIAS B C B C

16、CONTROLS CT-203/KXF-4010(K) COVER( 98.4.25 0:05 PM yW 6 RadioFans.CN 收音机爱 好者资料库 CT-203/2050/KXF-W4010/W6010 4 RESET BAUTO BIASCCRSMPX FILTERNORM.-DUBB.-HIGHRELAY RECREV.MODEDOLBY NRRESET A FORWARDSTOPREVERSEFORWARDSTOPREVERSE RESET BAUTO BIASCCRSMPX FILTERREV.MODEDOLBY NRRESET A FORWARDSTOPREVERSEFO

17、RWARDSTOPREVERSE RESET A key (COUNTER) DUBBING key NORMAL HIGH MPX FILTER key REV.MODE key CCRS key DOLBY NR key RELAY REC key AUTO BIAS key RESET B key (COUNTER) STOP keySTOP key Play keys , (For deck A) Play keys , (For deck B) RESET A key (COUNTER) MPX FILTER key REV.MODE key CCRS key DOLBY NR ke

18、y AUTO BIAS key RESET B key (COUNTER) STOP keySTOP key Play keys , (For deck A) Play keys , (For deck B) Operation key section (KXF-W4010) Operation key section (KXF-W6010) CONTROLS CT-203/KXF-4010(K) COVER( 98.4.25 0:05 PM yW 7 RECPLAY LINEINLINEOUT R L SYSTEM CONTROL Oscilloscope AG AC voltmeterAC

19、 voltmeter Frequency counter (A) (B) 8 Please refer to Automatic Adjustment for Playing, Recording, BIAS level adjustment. (a) Azimuth adjustment screwSystem connections CT-203/2050/KXF-W4010/W6010 5 ADJUSTMENT CT-203/KXF-4010(K) COVER( 98.4.25 0:05 PM yW 10 CT-203/2050/KXF-W4010/W6010 6 ADJUSTMENT

20、CT-203/KXF-4010(K) COVER( 98.4.25 0:05 PM yW 11 ACEGIBDFHJ 2 1 3 5 7 4 6 Refer to the schematic diagram for the value of resistors and capacitors. PC BOARD(Component side view) 78 CT-203/KXF PCB/SD 2P 98.4.25 0:12 PM y W 1 ABDFHJCEGI 2 1 3 5 7 4 6 12. 8V 6. 4V 6. 4V 6. 4V 6. 4V 6. 4V 6. 4V 12. 8V 12

21、. 2V 3. 8V 0. 8V 1. 2V 3. 8V 9. 9V 10. 0V 12. 8V 12. 8V 12. 8V 12. 8V 1. 7V 12. 8V 12. 8V 0V0V 0. 6V 4. 4V 4. 4V 0V 0V 4. 4V 0. 6V0V0V 11. 9V11. 9V 11. 9V11. 9V 5. 5V 5. 5V 5. 5V 5. 5V 12. 8V 12. 7V PLAY, REC REC PAUSE : 4. 6V OTHER:0V 6. 4V 6. 4V REC:4. 9V OTHER: 0V A. PLAY: 0V B. PLAY: 4. 7V A. PL

22、AY B. PLAY: 0V : 4. 7V BIAS ON: 4. 6V BIAS OFF: 0V 4. 6V PLAY, REC OTHER: 0V REC PAUSE : 4. 6V REC: 4. 7V OTHER: 0V PLAY, REC OTHER: 0. 6V REC PAUSE : 0V REC: 0V OTHER: 0. 6V 1. 2V 1. 2V 1. 2V 1. 2V 6. 0V 1. 2V 6. 0V CrO2: 0V NORMAL: 1.2V REC: 0. 7V OTHER:0V OTHER: 0. 6VPLAY, REC,REC PAUSE:0V REC:0V

23、 OTHER: 0. 6V 4. 5V 4. 2V 0. 1V 0. 2V 0. 2V 0. 2V 4. 5V 4. 7V 0. 6V 2. 6V 12. 2V 2. 7V 2. 6V 6. 1V 6. 0V 0. 2V 6. 0V 6. 0V 6. 0V 0. 2V 12. 8V X28- ( G / 8 ) X28 - 278x - x x A / 8 CN6 CN5 CN2 REC IN PLAY OUT J 1 J 2 WH2 Q1 Q2 I C7 I C7 Q3 Q4 Q50 D3 CN3 Q51 Q52 L R I C3 HX- PRO Q26 Q53 IC5 I C5 Q9 Q1

24、0 Q6 Q8 I C4 Q7 Q5 Q18 Q16 Q17 Q15 Q27Q28 Q24 Q25 B MECHA I C4 J 6 1 / 2 2 / 2 J 4 CN13 1 / 2 2 / 2 1/ 2 2 / 2 D2 * * * * * * Q49 * * * * * * * * * * * * * * * * * * * * * * * * * * * Q29 Q31 Q33 Q35 Q30 Q32 Q34 Q36 Q38 Q40Q39 Q37 * * * * * * * * Q41Q42 Q43Q44 D68 D69 D70 D71 D72 D35 D75 D36 D73 D74

25、 D76 D77 J 8 J 9 J 5 KX- W6080 CN2 KX- W4080 B MECHA A MECHAA MECHA Rc h( RED ) L c h( WHITE ) COM( BLUE ) Rc h( RED ) L c h( WHITE ) E (GRAY ) E (YEL LOW) COM( BLUE ) PHRPEH I C2 J 14 J 12 J 13 ERASE B PB A PB I C1 I C2 I C3 I C4, 5 I C6 I C7 I C8 I C9 I C10: XL24C01AP : CXP82540 - 136Q : HA12167FB

26、 : UPC1297CA : TA8125S : NJM4558D : S- 806D- Z : BA17812T or UPC7812AHF : BA10393 Q14, 15, 16 Q512, 19, 20, 22 2628, 43, 44 4850, 53, 6568 Q13, 14, 17, 18 Q2325 Q2936, 51, 52, 54 Q3740 : 2SD1450(S, T) UN4212 : DTC124ES or UN4112 : DTA124ES or : 2SC3311A( Q, R) : 2SC1845(F, E) : 2SC2003(L, K) Q41, 42

27、 Q47 : 2SA992( F, E ) : 2SA1534A( R, S ) D2, 3, 5, 6, 1012 D7 : 1SS 133 or HSS104 : HZS6. 8N( B2 ) or RD6. 8ES( B2 ) D8 D9, 20 D13 D18 : HZS13N( B2 ) or RD13ES( B2 ) : HZS5. 6N( B2 ) or RD5. 6ES( B2 ) : HZS3. 9N( B2 ) or RD3. 9ES( B2 ) D4: D3SBA20F03 or RBV- 402LFA SELECT R/ P A / B HI .EQ LINE MUTE

28、 BUFF LINE MUTE LEVEL AMP S /W L INE MUTE DRIVE REC MUTE DRIVE LEVEL AMP SW REC MUTE SW OSC 21, 45, 46, 58 Q55: 2SD2374 Q57: 2SA1535A Q56, 59, 60, 63, 64: 2SC3246 Q61, 62: 2SA1309A( Q, R) or or 2SA1048( Y, GR) 1417, 19, 2130 : HZS20N(B) or RD20ES(B) D 3 7: HZS2. 7N( B2 ) or RD2. 7ES( B2 ) 6777 PHONE

29、S SYSTEM IC HEAD Rch Lc h Rc h Lc h Lc h Rc h 2SC2458(Y,GR) 3336,46, , R812K A.REC PLAY GND A. CrO2 MOTOR COM +12V M(B) M(A) PHA R G L L R L R 1 3 2 4 R171R172 C115 C116 R170 R169 C117 R168R167 R163 C1131050 C114 R164 R166 R165 R173 R161 R162 R1 100 R2 100 R7 R5 R6 R8 1K 3. 9K 3. 9K 1K C31050 C4 105

30、0 R3 C1 R4 C2 18K 2700P 18K 2700P R175 R176 10K R11 R9R10 100K100K R17R18 100K100K R12 10K C118 10010 C5 1050 C6 10 50 1 2 3 4 5 6 7 8 10K R15 R13 3. 9K R14 3. 9K R16 10K R G L - EH K2 L6 L5 3 2 14 5 3 2 14 5 VCA PRE 10 11 12 VCA DET PEAKABSO DET COMP. 7 8 DRIVER THERMAL DETECT ING PROTECTIONC IRCUI

31、T STAOIL I Z I NG POWER SOURCE PEAK DET ABSO DET COMP. 569 C1010. 01 4 C99 0. 022 15 C1000. 022 131418 C1020. 01 1 2 3 16 17 R136 33K R135 33K C96 0. 01 C95 0. 01 560PC97 C98560PR134 220K R16022K L9 6 4 1 2 3 5 680P680P R31R32 150K150K C19 C20 C22 C21 1050 4716 4716 1050 R33 180 C25 C26 390P 390P R3

32、5 R36 6. 2K 6. 2K R37 R38 150K 150K C27 C28 0. 022 0. 022 1 2 3 4 5 6 7 8 C119 C120 33016 10016 R178 R179 1K 1 / 4W 1K 1 / 4W R28 150K C18 0. 022 R26 6. 2K C12 390P C10 1050 C16 4716 R22 180 C14 R24 220K 330K R20 C8 220P 8 7 6 5 C7 220P 330K R19 R21 180 C13 R23 220K C9 1050 C15 4716 C11 390P R25 6.

33、2K C17 0. 022 R27 150K 4 3 2 1 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53REC OUT + - LMA RECT EQ VOL REC EQ 5BIT DAC + - LMA 5BIT DAC REC EQ EQ VOL RECT REC OUT SW I IL LOGIC C M M B IAS ADJ INJ 5BIT DAC GND

34、 COUT B IAS(L ) Vcc 5BIT DAC B IAS(R) EQ - CONTROLER HC HN NM NC NN FM FQ F/ Q GH GL GP HM D-GND ON/OFF C/O NPX RESET R123 R90 R8962K C810. 150 R79100K R8810K C7918P C8018P R80 C82 100K 0. 150 R83 10K R82 R84 10K R855. 6K R865. 6K R875. 6K C7856P R7856K C702.2 50 C752.2 50 C762.2 50 C772.2 50 R765.

35、6K C68150 C662.2 50 C640.150 C621050 R70 10K R62R60 5. 1K R72 220K R68 3. 9K R7447K R9324K C692.2 50 C67150 R67 3. 9K R69 10K R71 220K R61 R755. 6K R77 56K R73 47K C652.250 C630.1 50 C611050 10mHL2 L110mH C88220P C87220P R39 R40 1. 5K 1. 5K R301. 5K R291. 5K R65 10K 1 2 3 MOTOR B A + 1. 5K Rch Lch G

36、ND PHOTO REFLECTOR 4 5 - EH +EH 560560 10 10 3316 560560 56K56K 3. 3K 47K 47K 1050 ( 8 1 0 ) ( 2 2, 2 3) NC KXF-W6010 : D4 0 - 1473- 0 5 22KR174 R9110K C86 33016 ERASE HEAD 100K 15 1 / 4W R177 4716 18K 18K 4716 N.NORN.Cro2H.NORH. Cro2 R59 5.1K22K R122 R121 R120 R119 R118 R117 R116 R115 R114 R113 R11

37、2 R111 R110 R109 R108 R107 R106 R105 R104 R103 R102 R101 R100 100K56K100K 39K 36K 33K 18K 56K56K75K82K 39K39K18K 18K33K18K 27K 39K27K 27K51K22K 2K 100K 22K 43K 43K C23 180 R34 C24 - EH K1 W65 W61 10KR126 10KR125 15K 15K R129 R130 15KR128 15KR127 R137 4. 7K R139 4. 7K R141 4. 7K R143 4. 7K R138 4. 7K

38、 R140 4. 7K R142 4. 7K R144 4. 7K W222 W223 SOL R. REC PACK NC NC B. PLAY GND B. CrO2 MOTOR COM +12V M(B) M(A) PHB SOL R. REC PACK NC NC B. REC 220P C92 * * * R132220K C103 1050 R133 220K 220K R131 W224 W227 W29 1. 2K 1.2 K R146 R148 1. 2K 1.2 K R147 R145 10P 500C105 10P 500C104 0. 047C142 0. 047C15

39、2 C111 C1120. 01 0. 01 5. 6K5. 6KR151R152 22KR14922KR150 10K R219 10K R220 SOL. FWD REC PLAY CrO2 RVS REC PACK B. PLAY GND B.CrO2 MOTOR COM +12V M(B) M(A) PHB SOL R. REC PACK NC NC B. REC 1 2 3 4 5 1 2 3 4 5 2 3 1R G L 1 2 3 MOTOR B A + 1. 5K Rch Lch GND PHOTO REFLECTOR 4 5 - EH +EH KXF-W4010 : D4 0

40、 - 1473- 05 ERASE HEAD SOL. FWD REC PLAY CrO2 RVS REC PACK B. PLAY GND B.CrO2 MOTOR COM +12V M(B) M(A) PHB SOL R.REC PACK NC NC B. REC 1 2 3 MOTOR B A + 1. 5K Rch Lch GND PHOTO REFLECTOR 4 5 - EH +EH KXF-W6010 : D4 0- 1450 - 0 5 ERASE HEAD SOL. FWD REC PLAY CrO2 RVS REC PACK PLAY GND B. CrO2 MOTOR C

41、OM +12V M(B) M(A) PHA SOL R. REC PACK NC NC A. REC 1 2 3 MOTOR B A + 1. 5K PLAY HEAD Rch Lch PHOTO REFLECTOR KXF-W4010 : D4 0 - 1451- 0 5 SOL. PLAY CrO2 PACK Rch Lch GND PLAY GND B. CrO2 MOTOR COM +12V M(B) M(A) PHA SOL R. REC PACK NC NC A. REC R/P HEAD Rch Lch R/P HEAD Rch Lch R/P HEAD Rch Lch 1/ 4

42、W 15 R254 +EH +EH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 ( 2 3 ) ( 2 2 ) ( 19 ) ( 10 ) ( 9 ) ( 8 ) ( 2 7 ) (18 ) (1

43、7 ) (16 ) (15 ) (14 ) (42 ) (43 ) (79 ) (80 ) (25 ) ( 24) TO CN2 TO CN5 TO CN3 TO CN6 ( 76) ( 74) ( 76) (74 ) C165 0. 01 0. 01C164 W51 C94 220P C90 220P C91 C93 C89 220P W47 + + + + + - + ( 1 ) ( 2 ) ( 2 ) ( 1 ) ( 1 ) ( 2 ) ( 1 ) ( 2 ) ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( 6 ) ( 7 ) ( 8 ) CAUTION: For con

44、tinued 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 shock, leakage-curren

45、t or resistance measurements shall be carried out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer. DOLBY and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. Noise reduction circuit made under license fr

46、om Dolby Laboratories Licensing Corporation. The DC voltage is an actual reading measured with a high impedance type voltmeter with a cassette loaded at playback mode. The measurement value may vary depending on the measuring instruments used or on the product. Bias circuit DC voltage is measured wh

47、ile in the record mode. CT-203/KXF PCB/SD 2P 98.4.25 0:12 PM y W 2 KMOQSLNPRT - 19. 5V- 44. 0V 12. 8V - 19. 5V 4. 9V 4. 9V 4. 9V 3. 6V 24. 7V11. 9V 19. 4V 24. 0V 4. 9V 4. 9V 0V 4. 6V 28. 6V 0. 6V - 13. 2V - 19. 5V - 36. 2V- 11. 5V 13. 7V 0V 8. 7V(REC) - 13. 4V 28. 6V - 13. 7V - 19. 5V 0. 4V 0. 4V OT

48、HER:12.4V REC:0V OTHER:0V REC: 4.9V 0V 0V 2. 4V 4. 9V 4. 8V 0V 4. 9V 0V 0V 4. 9V 4. 9V 4. 6V REC: 4.9V 400: 4. 9V 12. 5K: 0V ON:0V OTHER: 4.8V 2. 5V 2. 5V 0V 0. 6V 0. 6V 4. 6V 4. 6V OTHER: 0V 5. 0V 5. 0V 4. 9V 4. 9V 2. 2K 2. 2K 5. 0V 0V 5. 0V 0V 4. 9V HI SPEED : 0V NORMAL SPEED : 4. 9V HI SPEED: 11. 9V NORMAL SPEED: 0V B. MOTOR ON: 0. 7V OFF:0V HI SPEED : 0V NORMAL SPEED : 4. 6V A. MOTO