Kenwood-DPC-781-Service-Manual 电路图 维修手册.pdf

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1、PORTABLE CD PLAYER DPC-781/782/981 SERVICE MANUAL 1997-10/B51-5379-00 (K/K) 3176 Format System.Compact disc digital audio system Laser.Semiconductor laser Audio Frequency response.20 Hz 20 kHz, 3 dB Headphone output (16 , 1 kHz).10 mW + 10 mW (Headphone output level / impedance.max. 450 mV / 2.2 ) F

2、or CHINA and Duty Free Shop in JAPAN Digital output optical.-21 dBm -15 dBm (wave lenght 660nm) For other countries LINE output level / impedance.550 mV / 702 Power supply External DC supply .DC 4.5 6 V Rechargeable batteries.DC 2.4 V Commercially - available alkaline batteries.DC 3 V Battery life (

3、continuous playback) Repeat playback stops after 16 times. (Figures inside parentheses are the values when D.A.S.C. is ON.) Commercially-available alkaline batteries (LR6 / AA) x 4 .Approx. 40 (34) hours Commercially-available alkaline batteries (LR6 / AA) x 2 .Approx. 18.5 (17) hours Rechargeable b

4、atteries (NB - 130) x 2.Approx. 9.0 (8.0) hours With 2 commercially-available alkaline batteries and rechargeable batteries.Approx. 27.5 (25) hours Dimensions (W x H x D).133.6 mm x 26.5 mm x 151.8 mm Weight (net).270 g (9.5 oz.) SPECIFICATIONS 1. KENWOOD follows a policy of continuous advancements

5、in development. For this reason specifications may be changed without notice. 2. Sufficient performance may not be exhibited at extremely cold locations (where water freezes.). NotesNotes * Refer to parts list on page 15. In compliance with Federal Regulations, following are reproduc- tions of label

6、s on, or inside the product relating to laser product safety. KENWOOD-Crop. certifies this equipment conforms to DHHS Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J. DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM Front glass (B10-2388-04) Plastic c

7、abinet * (A02-) Chassis (A10-3391-01) DC jack (E03-0355-05) Cover Assy * (F07-) Knob (K29-6787-04) Knob (K29-6785-03) Knob (K29-6783-03) Knob (K29-6789-04) Variable resistor (R31-0090-05) Miniature phone jack * (E11-) Ecctric circuit module (W02-2527-05) Miniature phone jack (E11-0371-05) Miniature

8、phone jack (E11-0278-05) Escutcheon * (B07-) Knob (K29-6788-03) DPC-781/782/981(K) 1P( 98.4.24 23:08 yW 2 RadioFans.CN 收音机爱 好者资料库 DPC-781/782/981 2 CONTENTS/ACCESSORIES Stereo headphone (1) (W01-0923-05) DPC-981 M type DPC-781 M type DPC-782 X type Stereo headphone (1) (W01-0924-05) DPC-782 Cassette

9、 adaptor (1) (W01-0922-05) DPC-782 Car battery adaptor (1) (W01-0921-05) DPC-782 AC plug adaptor (1) (E03-0115-05) M type Rechargeable battery (2) option : NB -130 (W09-1237-05) Remote control (1) (A70-1171-05) DPC-981 M type DPC-781 M type (A70-1190-05) DPC-782 X type AC adaptor (1) (W08-0658-05) E

10、 type (W08-0659-05) T type (W08-0660-05) X type (W08-0667-05) M type (W09-1251-05) K, P type Remote controller assy (1) (A70-1037-05) DPC-782 DPC-981 K,P type Audio cord (E30-2782-05) DPC981 T,E type Battery (1) DPC-981 Stereo headphone (1) (W01-0946-05) DPC-981 M type (W01-0947-05) DPC-981 K,P type

11、 (W01-0954-05) DPC-981 T,E type SPECIFICATIONS .Top cover CONTENTS/ACCESSORIES .2 ADJUSTMENT.3 PC BOARD . 5 SCHEMATIC DIAGRAM . 7 EXPLODED VIEW .13 PARTS LIST.15 Accessories CONTENTS AAA () DPC-781/782/981(K) 1P( 98.4.24 23:08 yW 3 RadioFans.CN 收音机爱 好者资料库 DPC-781/782/981 3 ADJUSTMENT 1. Test Mode 1-

12、1 Setting the test mode This model can be set to the test mode by shorting the test-land of the X32 board. START Turn on lid switch Is test land shorted? Test mode pro- cessing Is key pushed? Track No. 01 is displayed. TEST MODEYES NO NO See following table. Normal operation No.ModeKey NameFunctionT

13、RACK No. display 105 PLAY/PAUSE (6) 1. Focus servo.ON 2. Tracking servo.ON 3. Feed servo.ON Absolute time at position of limit SW is displayed in time area, then play is started. 05 After 1, 2 and 3 are fin- ished, track No. played currently and its play time are indicated. 203 UP () 1. Focus servo.

14、ON 2. Tracking servo.OFF 3. Feed servo .OFF 03 301 STOP (7) 1. Focus servo.OFF 2. Tracking servo.OFF 3. Feed servo .OFF Test mode can be can celled while pressing the STOP (7) Key in 01 mode. 01 4While pressing the P. MODE/SEARCH Key, turn the AC ON All LCD is turned ON for 2 seconds. All LCD is tur

15、ned OFF for 2 seconds. Returned to normal mode. 1-2 Key and functions avild in test mode DPC-781/782/981(K) 1P( 98.4.24 23:08 yW 6 RadioFans.CN 收音机爱 好者资料库 DPC-781/782/981 4 ADJUSTMENT No. 2 1 LASER POWER Apply the sensor section of optical power meter on the pickup lens. Short the test land. Confirm

16、 that the display is . Press FF Key and confirm that the display is 03. On the power from 0.08 to 0.15 mW, when the diffraction grating is correctly aligned with the RF level of 1.0 Vp-p or more. 3 4 5 ITEM FOCUS ERROR TRACKING ERROR FOCUS GAIN TRACKING GAIN INPUT SETTING Test disc KTD-03 Test disc

17、KTD-03 Test disc KTD-03 Apply signal of 1.0kHz, 0.05Vrms between Check-land F1 and F2. Test disc KTD-03 Apply signal of 1.0kHz, 0.05Vrms between Check-land T1 and T2. OUTPUT SETTING Connect an oscillo- scope as follows. CH1:RF (Check-land RF) CH2:T1 (Check-land TE1) Press the FF key. Confirm that th

18、e display is . Connect a LPF between Check- land F1 and F2 to which connect an oscilloscope or AC voltmeters. Connect a LPF between Check- land T1 and T2 to which connect an oscilloscope or AC voltmeters. Connect an oscillo- scope as follows. CH1:RF (Check-land RF) CH2:T1 (Check-land TE1) PLAYER SET

19、TING Press the PLAY key . Confirm that the display is 05. Press the PLAY key . Confirm that the display is 05. Press the PLAY key . Confirm that the display is 05. ALIGNMENT POINT TE BALANCE VR5 FOCUS GAIN VR4 TRACKING GAIN VR6 FE BALANCE VR3 ALIGN FOR Optimum eye pattern Symmetry between upper and

20、lower Two VTVMs should read the same value. Two VTVMs should read the same value. FIG. (d) (e) L.P.F L.P.F F1 F2 AC voltmeter VC 1.0kHz 0.05Vrms L.P.F L.P.F T1 T2 AC voltmeter VC 1.0kHz 0.05Vrms Note: Test DISC KTD-03, TCD-783 or equivalent LPF : Around 47k + 390 pF or so. Step 15 are in Test Mode.

21、(d) Focus Gain Two VTVMs should read the same value. (e) Tracking Gain Two VTVMs should read the same value. DPC-781/782/981(K) 1P( 98.4.24 23:08 yW 7 A C EBD 2 1 3 5 7 4 6 PC BOARD(Component side view) Refer to the schematic diagram for the value of resistors and capacitors.5 DPC-781/782(K) pcb 98.

22、3.20 4:10 PM yW 1 6 PC BOARD(Foil side view) Refer to the schematic diagram for the value of resistors and capacitors. 1 JFHGI 2 3 5 7 4 6 DPC-781/782(K) pcb 98.3.20 4:13 PM yW 2 1 2 3 4 5 6 7 IC11 IC12 E M M F (X32-348X-XX) PICKUP ASSY (T25-0049-05):KMS-542D A D CB IC13 IC5 IC1 IC2 Q20 CHARGE CONTR

23、OL PULSE OPE AMP (NO USED) Q23 D31 (PULSE IC Q21 CONTROL STEP DRIVE SPINDLE GAIN CHANGE-OVER (NOR./HI SPEED) D.S.P. D5 D3 (FOK L) CONTROL SLED GAIN (2/2) IC9 (1/2) IC9 CHARGE) SWITCH LIMITTER Q34 AC ADAPTOR DET. Q6 D1 Q1Q5 (DEFECT DET.) COMPARATOR DEFECT DET. VOLUME D6 (1/2) IC10 D15D14 D2 D25 Q18 +

24、2.9V AVR )(CONVERTER DC-DC SWITCH DC-DC CONVERTER D26 Q9 PD LD D13 Q11 E1 AB CN1 CN6CN3 C A +2.9V AVR Q8 Q10 Q3 LD COIL FOS. COIL TRK. C 0N/OFF APC CN2 B RESET Q32 Q2 MOTOR DRIVER Q37 DET. BATTERY Q17 FG DET. RF/SERVO DEFECT (2/2) IC10 Q15 Q16 TG TB FB LASER DIODE Q13 Q14 D12 1.6V 2.3V 6.0V 1.5V 1.1

25、V 0V 3.1V 5.7V 0V0V 0V 0V 0V 5.7V 2.7V 0V 3.3V 1.4V 2.5V 0.8V 2.7V 1.1V 1.1V 1.1V 1.2V 1.1V 1.1V 1.1V 0V 0V 2.6V 2.7V 2.6V 1.3V 1.2V 1.4V 1.3V 1.3V 1.4V 1.3V 1.3V 1.3V 0.3V 1.3V 2.6V 1.3V 1.2V 1.3V 1.2V 1.7V 0V 0V 2.6V 1.4V 2.6V 2.7V 1.4V 1.4V 1.1V 2.7V 0V 2.7V 2.7V 0V 0V 2.7V 2.7V 2.9V 5.6V BATT.2.

26、3V ACADP.5.0V BATT.2.6V 5.7V 0.1V0.2V 0.1V 0V 0V 0.1V 0.8V 1.3V 1.4V 0.8V 1.4V 1.4V 1.4V 1.6V 1.3V 2.4V 0V 0V 0V 0V 0.3V 0.2V 0.9V 2.1V 2.6V 1.2V 2.7V 2.5V 2.6V 2.5V 0V 2.7V 0V 0V 2.7V 0V 2.7V 2.5V 2.6V 2.5V 1.2V 1.6V 1.4V 1.4V 0.7V 1.0V 1.4V 1.4V 1.4V 1.4V 1.3V1.4V 1.4V 1.4V 1.4V 1.4V 0V 2.7V 0V 2.

27、7V 2.6V 2.6V 2.6V 1.5V 1.6V 0.6V 1.3V 0V 2.9V 1.4V 1.4V 1.4V 1.4V 1.4V 1.4V 1.6V 1.4V 1.4V 2.7V 1.4V 1.4V (BATTERY) 5.5V 2.9V 2.7V 5.0V 1.4V 2.7V 0.8V 0.6V 1.4V 1.8V 1.4V 2.0V 2.2V 0.2V 1.4V 1.4V 10K 11K 220P 220P + C112 10u10 1M 0.01 0.047 IC9(2/2) IC9(1/2) Q22 22K 16K R29 L1 470uH R26 W1 R205 R314

28、 10K 39K C34 1000P 1000P C38 0.033 3 2 1 +B +B +B +B +B R201 39 +B+B+B +B 15 R204 R214 18K R119 22K SYSM 12P C213 +B+B R212 22 C201 + 47u4 IC10(1/2) Q21 22K R23 R1 22K R218 4.7K 560 R217 16.9344MHz + C18 100u4 3.3 C10 + 22u10 2.6V +B +B+B +B+B +B +B +B +B +B +B +B +B +B +B +B C2PO C4M C453 10u10 + 1

29、30 R337 Q3 +B +B +B +B +B +B +B+B +B +B+B +B+B+B +B +B Q17 4 180K Q34 R9 180K R11 0.01 C5 300K R12 220K R10 300K R13 24K R8 47K R26 R7 3.3 R6 3.3 R14 2.7K + 22u16 C1 330 R25 0.1 C6 R15 0.01 C9 R16 390 +B IC10(2/2) Q15,16 R452 27K +B +B+B +5V 10K R301 0.1 C302 10K 1000P + C301 47u4 C451 1000P C450 +B

30、 +B +B +B +B +B+B +B +B +B +B +B +B +B +B R309 1000P C303 0.01 C305 R19 220P + 10u10 C35 1000P C39 1000P 1000P C37 OP- + C36 22u10 C43 1000P 1000P C31 PREGND 7 9 5 3 C8 0.01 R18 13K C44 +B+B 330 R219 49 47 39 15K R108 47K R118 180K 1.6K R116 34 - +1 2 3 38 +B +B +B R144 22K R142 1.3M R136 R135 R141

31、R143 4.7K C41 0.1 33K R24 29 31 10K R27 1 R204.7K R305 EXTVSS VO + -7 5 6 L2 25 27 - + 1 8 23 13TRK(+) - 2 + SPD. MOTOR + 2 1 2 - SLD. MOTOR 1 LMT. SW 1 X3 330K R206 1M R120 1M C120 150P SPDL+ SPDL- SLED+ SLED- SLTSW GND 41 40 40 R17 10K R22 220 + C17 100u10 3 VOEXT 4 2 VDD 1 VSSCE 5 SHORT LAND VCC

32、PD1 PD2 VC 6GND VR PD4 5 1 PD1 PD2 2 E3 15 14FCS(-) FCS(+) 12 11 10F A/L TRK(-) 9 8 7LD VCC VC + A/L 100K 82K 200P 390K R117 L11 +B+B + 47u4 C114 R215 470 R213 6.8K 330K R216 MDP 40 VR1 50K C306 1 C307 1 R327 470K R326 470K R316 470K R325 100K R21 47K 3 GND 4 SUB 2 OUT VCCNC 15 R342 4.7K R321 4.7K R

33、322 10K 38 34 41 40 C40 C32 1000P CO1 CO3 33 1 BATT1 BATT3 32 2 OUT1F OUT3F 31 3 POWGND POWGND 30 4 OUT1R OUT3R 29 5 BATT12 BATT34 28 6 OUT2F OUT4F 27 7 POWGND POWGND 26 8 OUT2R OUT4R 25 9 BATT2 BATT4 24 10 DGND 44 12 ESP CN3 43 13 PC CN4 42 14 CT IN4 41 15 RTIN3 4016 CLKVC 3917 VGIN1 3818 LGIN2 371

34、9 CN1 PREVCC 36 20 CN2 OPOUT 35 21 34 CH1MUTE 22 11 CO4 23 CO2 25 27 29 31 SPDL+ SPDL- SLED+ GND SLTSW SLED- 122112 91 R129 5 6 7 9 7 5 13 3 FCS+ FCS- TRK- TRK+ AL F VC VCC LD GND VR PD E PD1 PD2 13254151413121110 C128 22u10 VR3 22K10K R127 10K R130 R131 30K R128 4.7 + C126 47u4 R132 30K C116 C117 C

35、118 4700P C119 0.01 R114 2.2K R115 4.7K R113 22K C121 33P R137 100K 14 12 13 11 10 R112 220K R111 51K C111 1 R453 3.3K 510K 82K0.022 R139 VR4 22K C108 R104 C107 0.01 R103 510K C106 C104 0.1 R138 R107 + C105 4.7u6.3 R101 100 C102 0.47 C101 R102 56K C103 220P C110 7 4 8 56 0.1 +- C125 R134 1M R123 VR5

36、 22K 22K VR6 180K R106 100 C129 0.1 1.8M 6.8K R122 R125 24K R124 10K R126 20K R133 1M 180K 0.1 C122 + C127 22u4R140 C123 0.022 25 TAMFOK 12 26 FSET CC2 1127 TG2 CC1 1028 TGU CB 929 SRCH CP 830 FEM RFI 7 31 FEO RFO 6 32 FLB RFM 5 33 FGD LD 4 34 FDFCT PHD 3 35 FEI PHD1 2 24 SENS FE.B 37 23 C.OUT F 38

37、22 XRST E 39 21 DATA EI 40 20 XLT VEE 41 19 CLK TEO 42 18 VCC NC 43 17 ISET TEI 44 16 SLO ATSC 4515 SLM TZC 4614 SLP TDFCT 47 361 FEO PHD2 48 13 TAO VC 2 89 88 87 11 10 86 12 14 13 100 57 13 85 44 43 42 41 10K 220P C223 11K R223 R221 C214 12P R222 C224 R224 + C202 47u4 C210 0.01 430K R210 1.5K 9876

38、7 6 5 13 10uH + C203 0.047 0.47 C207 R209 1M C206 220P C205 3300P 100K C204 1500P + C209 22u4 R2073.3K R208 10K C208 0.15 R202 R203 VDD 61 ZLRCK 39 AVSS 62 YLRCK 38 AVDD 63 AOUT1 64 ASY0 37 AIN1 65 ASYI 36LOUT1 66 BIAS 35 AVSS 67 RF 34 XVDD 68 AVDD 33 XTAI 69 CLTV 32 XTAO 70 AVSS 31 XVSS 71 FILI 30 AVSS 72 FILO 29 LOUT2 73 PCO 28 AIN2 74 VCTL 27 AOUT2 75 V16M 26 AVDD 76 VCKI 2