B Hi-Fi Component SERVICE MANUAL MODEL DCD-485/685 STEREO CD PLAYER DCD-485 DCD-685 Some illustration using in this service manual is slightly from the actual set.
SAFETY PRECAUTIONS SAFETY PRECAUTIONS The following check should be performed for the continued prtection of the customer and service technician. LEAKAGE CURRENT CHECK Before reterning the unit to the customer,make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 miliamps, or if hte resistance from chassis to either side of the power cord is less than 460 kohms, the unit is detective.
DISASSENBLY Follow the the procedure procedure below below ininreverse reverseorder orderwhen whenreassembling) reassembling (Follow 1. Top Cover 1. Remove 4 screws 1 on both sides. 2. Remove 2 screws 2 on the Rear Panel. 3. Detach the Top Cover as shown in the fig. 2. Front Panel 1. Remove 1 screw 3 on the Rear Panel and 1 screw 4 fixing Support Bracket (b). (only DCD-485) 2. Take off the Mecha Cover after removing 2 screws 5 .
3. CD Mecha. Unit 1. Remove 4 screws 9 fixing the CD Mecha. 2. Unplug Connectors (b), (c) and FFC from each socket. 3. Release the FFC from the Clamper. 4. Main P.W.B. 1. Remove 5 screws 10 , 5 screws 11 on the Rear Panel and detach it. 2. Remove 3 screws 12 fixing the Main P.W.B. 3. Unfasten 1 P.W.B. Holder to detach the Main P.W.B. 4. Remove 1 screw and 2 screw fixing the Power P.W.B. 5. Unfasten 1 P.W.B. Holder to detach the Power P.W.B.
CD TEST MODE z Setting of the test mode How to start the test mode: Turn on the power in the condition that CLOSE (Pin No. 3 ) and OPEN (Pin No. 4 ) of CX053 are being shorted. ( “01” is indicated on the DISPLAY) To exit from the test mode, turn off the power. (Refer to Fig. 1 “Test Point Layout”) Fig. 1 “Test Point” Layout * Laser light of the pickup is always emitted regardless of DISC loading in the test mode. You may lose your eyesight if you look into the laser directly.
z How to check the test mode ( 1 ) DISC discrimination, adjustment * Insert DISC, and press the PAUSE button. * “06 Adj” is displayed, and discrimination of DISC size 8 cm/12 cm, discrimination of DISC reflectance (CD, CD-R/CD-RW), adjustment of focus, tracking offset, and EF balance will be performed. (Adjusted values are not displayed: Refer to Fig. 2, 3) FEO TEO TEO TB HF DRF SLD Fig. 2 DISC discrimination, adjustment Fig.
¥¥¥ Fig. 4 In “03 F on”¥¥¥ ¥¥¥¥¥¥¥¥¥Fig. 5 In “03 F on” * Press the PLAY button again. * “04 t on” is displayed. Tracking, CLV, and slide servo will be actuated. * Monitor HF signal using the test terminals, HF of CX053 (Pin No. 1 ) and VC of CX063 (Pin No. 5 : 2.5V ref. signal). Check that the signal’s amplitude is 1.5Vâ0.3Vp-p. (Refer to Fig. 6) HF A ( A = 1.5 ± 0.3 VP-P ) ¥¥¥ Fig.
Wave-forms of each point p SPD SPD FEO TEO When 12 cm DISC start SPD When 8 cm DISC start SPD When focus servo on When 12 cm DISC stop When 8 cm DISC stop TD TEO During PAUSE HF DRF DRF HF SLD SLD Track search (when reverse) Track search (when forward) TEO TEO During PLAY FD SLD OPEN When the tray OPEN CLOSE 8 Focus search (no DISC)
SLIDE Mtr. Drv. M CD MECHA KSL-2130CCM CLOSE-SW OPEN-SW INMOST-SW LOADING M SPINDLE M IC104 LA6995 Mtr. Drv. LOADING SPINDLE Mtr Drv. TRACKING COIL Drv. TRACKIN COIL SLIDE FOCUS COIL Drv. FOCUS COIL L.DIODE LD ON MAIN UNIT 1U-3346-1 DRF SL COTROL BUS DRV.MUTE IC101 ASP LA9241M PLL BU2616F IC107 CD/RW IC102 DSP LC78625E VCO TC9246F IC108 CONTROL REMOTE SENSOR IC702 XRST1 RW SW SUB CODE VFD FL601 DISPLAY CY271 CX271 CONTROL IC201 µ-COM µPD78044F D.
NOTE FOR HANDLING OF LASER PICK-UP Description of the Components +Z-axis direction +X-axis direction Object Lens Actuator cover PAL-2 Flexible board OP Slide base Label Slide rack Z-axis +Y-axis direction Y-axis (Tangental direction) Flexible flat cable connector X-axis (Radial direction) Label year (last figure) KSS-213C day Lot No. month quality control No. Lot No. Oct. Nov. and Dec. are expressed by alphabetical letters of X, Y and Z. lop 10 1 10-1 lop No.
Caution for Handling the Laser Pick-up The laser pick-up KSS-213C is assembled and precisely adjusted using a sophisticated manufacturing process in our plant. Do not disassemble or attempt to readjust it. Please observe the following instructions carefully in handling the pick-up. 4. Metal Bearing As the metal bearing of Cu-compound sintered alloy is impregnated with FROIL946P, never fail to supply the bushing with the same lubricant at the time of replacing the pick-up. 5. Handling 1.
SEMICONDUCTORS IC's P32/TO2 P31/TO1 P31/TO0 P03/INTP3/C10 PO2/INTP2 PO1/INTP1 POO/INTPO/T10 IC (Vpp) P72 P71 P70 P127/FIP33 VDD P126/FIP32 P125/FIP31 P124/FIP30 P123/FIP29 P122/FIP28 P121/FIP27 P120/FIP26 P117/FIP25 P116/FIP24 P115/FIP23 P114/FIP22 µPD78044FGF-188-3B9 (IC601) 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 67 38 P35/PCL P110/FIP18 68 37 P36/BUZ P107/FIP17 69 36 P37 P106/FIP16 70 35 X2 71 34 X1 P105/FIP15 72 33 Vss P104/F
Pin No. Terminal Port I/O Typ Rst Ini Act NC I A − − − Ext Function 31 P04/XT1 P.
Pin No. Thermal Shutdown Signal System VCC Output Control CH1 Output ON/OFF MUTE1 33 MUTE1 Level Shift 30 VIN4+ 29 VREF-IN Level Shift VO3+ 8 31 VIN4- 11k 28 VCONT(LOADING) VO3- 9 FR FR Power System GND Power System GND PNP Tr Collector Level Shift VO2+ 10 VO2- 11 Level Shift VO1- 13 VIN1 15 PNP Tr Base 33k VO1+ 12 VCC1 14 3.3VREG (External PNP) 27 REG-OUT 26 REG-IN 25 VIN3+ 11k 24 VIN323 VIN3 Power Supply (CH1 to CH4) 3.3VREG GND 22 GND-VREG 3.
PCM1735E (for DCD-485 : IC301) PCM1735E Terminal Function Pin No.
LC78625E (IC106) 16
Vcc M5290FP (IC502) 16 Collecter Out (+) Emitter Out (+) 15 14 NC OUT (+5V) 13 12 DELAY 11 REFERENCE −Vcc 1 + 16 +Vcc 15 Emitter Out (+) Collector Out (-) 2 CURRENT LIMITER REF.
IC PROTECTOR BA15218F (for DCD-485 : IC303) (for DCD-685 : IC323, 324) +B 8 V + A OUTPUT 1 A - INPUT 2 - A 7 B OUTPUT + B + - A +INPUT 3 V- ICP-N20 (IC503) 6 B - INPUT 4 -B 5 B +INPUT TRANSISTORS 2SA1037K (S/R) 2SC3326 (for DCD-485) 2SD2144S 2SB1185 (E/F) 2SD1762 (E/F) 2SB562 (C) 3 2 1 B (Base) C (Collector) E (Emitter) DTA124XKA PNP TYPE DTA144EK DTC114EK DTC144EK NPN TYPE DTC144TK 3 1: Emitter 2: Base/IN 3: Collector B (Base) C (Collector) E (Emitter) E (Emitter) C (Collector) B (Bas
Remote Control Sensor GP1U271X (IC601) FL DISPLAY 6-ST-33GK (Part No. : 393 8021 006) Anode Connection VOUT Vcc GND RL Hysteresis Compararor GND Vcc Vout 1G 2G 3G P1 1a 1a 1a P2 1b 1b 1b P3 1c 1c 1c P4 1d 1d 1d 1e P5 1e 1e P6 1f 1f 1f P7 1g 1g 1g P8 2a 2a 2a 2b P9 2b 2b P10 2c 2c 2c P11 2d 2d 2d P12 2e 2e 2e P13 2f 2f 2f P14 2g 2g 2g 4G 5G 6G P15 P16 1G 2a 2G 1a 1 1 f 1g b 1 e 1d 2a 3G 1a 2a 4G 1a 1 c 6G Pin Connection 1 Pin No.
PRINTED WIRING BOARD CD BOARD ASS'Y COMPONENT SIDE 20
COPPER SIDE 21
NOTE FOR PARTS LIST Part indicated with the mark "~" are not always in stock and possibly to take a long period of time for supplying, or in some case supplying of part may be refused. When ordering of part, clearly indicate "1" and "I" (i) to avoid mis-supplying. Ordering part without stating its part number can not be supplied. Part indicated with the mark " " is not illustrated in the exploded view. Not including Carbon Film ±5%, 1/4W Type in the P.W.Board parts list.
PARTS LIST OF P.W.B. UNIT ASS'Y 1U-3346 (DCD-485Model) / 1U-3346A (DCD-685Model) CD BOAD ASS’Y Ref. No. Part No.
Ref. No. R182 Part No. Part Name Remarks R194 R195 R196,197 R198 247 2005 903 Carbon chip 100 ohm 1/10W RM73B--101JT DCD-685 model only 247 2011 942 Carbon chip 47 kohm 1/10W RM73B--473JT 247 2018 903 Carbon chip 0 ohm 1/10W RM73B--0R0KT 247 2013 937 Carbon chip 300 kohm 1/10W RM73B--304JT DCD-685 model only 247 2018 903 Carbon chip 0 ohm 1/10W RM73B--0R0KT DCD-685 model only 247 2011 926 Carbon chip 39 kohm 1/10W RM73B--393JT 247 2008 968 Carbon chip 3.
Ref. No. R656 Part No. Part Name Remarks R657 247 2008 984 Carbon chip 3.
Ref. No. Part No.
Ref. No. Part No.
PARTS LIST OF EXPLODED VIEW Ref.No. Part No. 1 1 1-1 1-2 1-3 1-4 1-5 2-1 2-2 2 2 3 3 4-1 4-1 4-2 5 5 6 7 7 8 9 10 11 11 12 12 13 13 15 20 21 21 22 22 23 24 25 26 27 28 28 29 30 31 32 33 50 51 52 53 54 55 56 57 28 Part Name Remarks Q'ty Ref.No. Part No.
EXPLODED VIEW 29
WARNING: Parts marked with this symbol have critical characteristics. Use ONLY replacement parts recommended by the manufacturer.
PARTS LIST OF CD MECHANISM UNIT Ref. No. 1 Part No. Part Name RemarksQ'ty S26 4629 001 Tray (C) 2 1 This part (No.2)doesn't belong to the tray. Take it down from old tray and use again when changing the tray. 3 S26 2554 401 Gear cover(S) 1 4 S26 2553 501 Tray gear(S) 1 5 S26 2554 601 Chucking plate 1 6 S26 2629 401 Screw 2.
EXPLODED VIEW OF CD MECHANISM UNIT KSL 2130 CCM 1 1 3 1 3 7 3 6 7 3 8 3 3 6 8 3 2 3 4 9 3 5 5 3 9 3 3 3 2 3 2 4 4 1 2 -1 1 2 -2 1 4 1 4 2 7 1 0 1 3 4 2 1 3 3 2 4 0 4 1 2 6 4 3 6 4 2 5 2 8 1 7 1 8 1 9 3 1 2 2 4 2 0 2 1 2 2 2 3 32
PACKING VIEW 204 Contents 209 205 202 211 210 201 202 215 214 203 212 213 212 215 PARTS LIST OF PACKING AND ACCESSORIES Ref.No. 201 202 203 203 204 205 206 207 208 209 210 211 212 213 214 215 33 Part No. 505 0131 050 503 1386 002 501 2131 001 501 2131 014 505 9125 009 515 0867 101 203 2310 009 399 0360 006 206 2108 003 511 3758 008 206 2113 001 509 9120 006 513 9111 001 Part Name Cabinet cover Cushion Carton case Carton case Poly cover S.S.list(EX) 2P pin cord RC-266 AC conn with plug Inst.
SCHEMATIC DIAGRAM ( for DCD-485 ) DIGITAL OUT 37 TST10 7 NC VDD 16 8 MDT WCKO 15 NC IC304 OPEN [DF] DOL 14 DOR 13 DG 12 OPEN R318 OPEN OPEN C341 OPEN C349 OPEN 1 2 5 6 C334 OPEN 7 DATA BCLK +Vdd 13 AGND 12 IOUT 11 -Vdd NC 8 NC BPO DC +Vcc OPEN C342 OPEN 26 25 24 23 22 21 20 19 18 17 16 15 14 13 9 12 8 11 7 10 6 5 4 3 2 1 P5 P6 P7 P8 P9 75 74 73 72 71 70 69 68 67 66 65 FIP12 FIP13 FIP14 FIP15 VLOAD FIP16 FIP17 FIP18 F
SCHEMATIC DIAGRAM ( for DCD-485 ) DIGITAL OUT 37 TST10 7 NC VDD 16 8 MDT WCKO 15 NC IC304 OPEN [DF] DOL 14 DOR 13 DG 12 OPEN R318 OPEN C325 OPEN IC323 OPEN OPEN C341 OPEN 1 2 3 C328 OPEN 4 C330 OPEN 5 R246 10K 6 C334 OPEN R901 OPEN 7 DATA BCLK +Vdd R902 OPEN -Vcc REF DC SERVO DC C319 OPEN 13 AGND 12 IOUT 11 -Vdd NC 8 NC BPO DC +Vcc R328 OPEN C366 OPEN 6 7 1/2 5 IC324 OPEN C356 OPEN C358 OPEN C362 OPEN C350 OPEN OPEN C342 OPEN 26 25 24 23 22 21
SCHEMATIC DIAGRAM ( for DCD-485 ) C246 OPEN C218 OPEN 7 FB127 BEADS C217 OPEN OPEN C216 R216 OPEN FB124 SHORT FB122 OPEN C226 CK1000P R223 OPEN R220 OPEN C134 OPEN SQOUT. COIN. 66 65 PW EFLG SBSY DOUT MUTER IC106 TEST2 RVDD RCHP LC78625E CLV+ CLV- RCHN RVSS [DSP] LVSS V/P FOCS LCHN FST LCHP FZD LVDD HFL MUTEL TES C2F PCK ROMXA FSEQ CK2 TOFF LRSY TGL IC110 OPEN 4 Q CLR 6 4 FB125 EMIFIL R233 47 C222 CK0.1Z R234 8.2K R235 8.2K R236 8.2K R237 8.2K C225 CK0.
DIGITAL OUT [COAXAL] P6 P7 P8 P9 77 76 75 74 73 72 71 70 69 68 67 66 65 FIP11 FIP12 FIP13 FIP14 FIP15 VLOAD FIP16 FIP17 FIP18 FIP19 FIP20 FIP21 27 R236 8.2K R403 OPEN 1 R405 OPEN 5 3 A_MUTE RESET 3 LINE_MUTE 4 +5V[A1] 5 GND[A1] 6 -5V[A1-1] 7 -5V[D1] 8 +5V[D1] 9 GND[D1] +5V_A -5V_A +5V_D1 GND_A +5V_D2 C312 +5V[D2] 11 GND[D2] 12 -8V[A1-1] 13 GND[D3-1] -8V_A ML. MCLK.
VCONT 41 42 40 P2 39 P1 38 P0 37 TST10 36 DACKO 35 DFOLO R229 28 1 NC ZEROR VOUTR VOUTL 16 AGND1 VCC1 15 27 EXTR 26 2 3 4 5 6 7 8 9 10 25 R309 3.6K 3 OPEN 4 DRF 5 +5V 5 VC 6 NC CX053 5P-NH 21 VCC2L 20 22 ZEROL C310 CK0.1Z CK0. GND_D1 R307 47K C307 IC301 C308 CK0.1Z TEO PCM1735E C316 2.2/50 C309 47/16 19 EXTL 17 AGND2L 18 CK0.1Z C306 10/16 RST R306 3.6K R310 3.
GND[A1] 6 -5V[A1-1] 7 -5V[D1] 8 +5V[D1] 9 GND[D1] 1 4 5 1U-3346-6 H/P JACK UNIT C413 CK0.1Z 3 +5V[A1] 2 LINE_MUTE 4 R RESET 3 CK0 C41 2 +5V_A W701 1P WIRE GND_A -5V_A CY041B 4P-PH -5V_D1 +5V_D1 GND_A +5V_D2 C311 CK0.1Z GND_D1 C321 CQ820P(NH) R309 3.6K C319 OPEN C317 CQ1000P(NH) R313 10K 4 6 R311 10K C323 OPEN 13 Rch CX052 5P-PH C385 56P C395 100P R377 15K (2/2) 6 7 4 C390 R378 15K C389 CK0.
SCHEMATIC DIAGRAM ( for DCD-685 ) DIGITAL OUT BPO DC +Vcc R318 22 C332 47/16 3 C330 CK0.1Z 5 6 C334 47/16 BCLK -Vcc 16 REF DC 15 +Vdd SERVO DC 14 AGND 13 AGND 12 IOUT 11 DGND -Vdd WCLK 7 NC 8 NC BPO DC +Vcc GND R901 OPEN R902 OPEN C338 CK0.1Z C340 CK0.1Z C342 CK0.01 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 9 11 8 7 10 6 5 4 3 2 1 R643 270 R639 150 R642 180 R644 270 P1 P2 P3 P4 10K C616 CK0.01 10K C615 CK0.01 C617 CK0.
SCHEMATIC DIAGRAM ( for DCD-685 ) DIGITAL OUT 22 C325 CK0.1Z 22 +Vcc C332 47/16 C349 CK0.1Z 3 C330 CK0.1Z 5 6 C334 47/16 BCLK +Vdd -Vcc 16 REF DC 15 SERVO DC 14 AGND 13 AGND 12 IOUT 11 DGND -Vdd WCLK 7 NC 8 NC BPO DC +Vcc GND R901 OPEN R902 OPEN 38 P0 39 P1 C338 CK0.1Z C340 CK0.1Z C342 CK0.01 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 9 11 8 7 10 6 5 R641 180 R643 270 R639 150 R642 180 R644 270 P1 P3 P4 P2 10K R654 C616 CK0.
SCHEMATIC DIAGRAM ( for DCD-685 ) C246 OPEN 7 FB127 BEADS C217 330/16 C218 CK0.01 CK0.1Z C216 R216 0 FB124 SHORT FB122 OPEN C226 CK1000P R223 0 R220 0 C134 OPEN SQOUT. PR Q D IC110 OPEN 5 3 CK GND 4 Q CLR 6 4 66 65 COIN SQOUT DOUT EFMO MUTER IC106 EFMIN TEST2 RVDD RCHP LC78625E CLV+ CLV- RCHN RVSS [DSP] V/P LVSS FOCS LCHN FST LCHP FZD LVDD HFL MUTEL TES C2F PCK ROMXA FSEQ CK2 TOFF LRSY TGL R233 47 C222 CK0.1Z R234 8.2K R235 8.2K R236 8.2K R237 8.
DIGITAL OUT [COAXAL] 26 1 27 CLOSE R236 8.2K 1U-3346-3 DISP. UNIT 3 6 A_MUTE RESET 3 LINE_MUTE 4 +5V[A1] 5 GND[A1] 6 -5V[A1-1] 7 -5V[D1] 8 +5V[D1] 9 GND[D1] +5V_A -5V_A +5V_D1 GND_A +5V_D2 GND_D1 MDATA. MCS. R305 R309 +5V[D2] 11 GND[D2] 12 -8V[A1-1] 13 GND[D3-1] 14 +8V[A1-1] -8V_A GND_D2 C321 OPEN C319 +8V_A IC303 OPEN R903 OPEN C312 OPEN 10 +5V_A ML. MCLK.
C129 OPEN CKO BKO VSS NC 18 6 NC NC 17 7 NC VDD 16 8 MDT WCKO 15 9 MCK DOL 14 10 MLEN DOR 13 11 RST [DF] DG 5 40 P2 39 P1 38 P0 37 TST10 36 DACKO 35 DFOLO 34 DFORO 33 LRCKO 31 TEST4 30 DEMO 29 JP- 28 JP+ 27 VDD 26 TEST3 32 EMPH 22 R229 28 1 2 3 4 5 6 7 R228 22 27 26 25 7 8 NC R317 22 R318 22 GND_D1 18 C316 OPEN 17 C309 OPEN R306 OPEN C332 47/16 13 AGND 12 BPO DC +Vcc IC323 BA15218F 10 9 C345 47/16 C349 CK0.
-5V_A -5V[A1-1] -5V[D1] 8 +5V[D1] 9 GND[D1] 4 GND[A1] 7 3 +5V[A1] 6 2 4 5 GND_A 1 1P WIRE CY041B OPEN -5V_D1 +5V_D1 GND_A +5V_D2 C311 OPEN GND_D1 C321 OPEN IC303 OPEN C319 OPEN OPEN C317 C323 OPEN +8V[A1-1] TR324 2SD2144 Rch C385 56P C395 100P 3.9K R377 51K GND[D1-2] 1 MUTE 2 L 3 CK0.1Z C391 8 (2/2) 6 7 4 C386 56P C390 R378 51K R376 3.9K C389 CK0.1Z 3 F1 4 F2 5 C522 CK6800P D510 1SS270A TR507 DTC114EK C529 CK0.1Z IC502 M5290P C530 CK0.
