XM-PX50WT SERVICE MANUAL PORTABLE MINIDISC PLAYER XM-PX50WT UB Area Suffix Hong Kong Contents Safety Precautions Important for laser products Attention when MD pick up is exchanged Disassembly method Adjustment method Maintenance of laser pickup Replacement of laser pickup Description of major ICs COPYRIGHT 1-2 1-3 1-4 1-5 1-11 1-12 1-12 1-13~25 2001 VICTOR COMPANY OF JAPAN, LTD. No.20902 Jan.
XM-PX50WT 1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only. 2. Alterations of the design or circuitry of the product should not be made.
XM-PX50WT Important for laser products 5.CAUTION : If safety switches malfunction, the laser is able 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
XM-PX50WT Attention when MD pickup is exchanged 1. About the static electricity protection measures The laser diode in the traverse unit (optical pick up) is easy to be destroyed by clothes and the human body to the electrified static electricity. Please note the explosion by static electricity when repairing. 2.
XM-PX50WT MD door assembly Disassembly method Removing the MD door assembly (See Fig.1 and 2) 1. Shift the door lever to open the door. 2. Remove the four screws A and detach the MD door assembly from the main body. A Door lever Fig.1 Removing the holder assembly (See Fig.3 and 4) MD door assembly Prior to performing the following procedure, remove the MD door assembly. 1. Turn the Holder assembly as shown in Fig.3. 2. Pull the side arm (L) marked a and remove outward.
XM-PX50WT Chassis assembly Removing the chassis assembly (See Fig.5 to 7) Side arm (R) Prior to performing the following procedure, remove the MD door assembly and the holder assembly. 1. Open the battery lid. Release the tab d and pull out the battery lid. 2. Remove the screw B and pull out the side arm (R) upward. Tab d Joint e 3. Remove the two screws C and pull out the eject unit. Joints e B 4. Remove the screw D, E, F and G attaching the chassis assembly respectively. Battery lid Fig.5 5.
XM-PX50WT Removing the main board and the battery holder (See Fig.8 and 9) Battery holder CN401 Soldering f CN301 Prior to performing the following procedures, remove the MD door assembly, the holder assembly and the chassis assembly. ATTENTION: Before disconnecting the flexible wire extending from the pickup, make sure to solder the short circuit round to prevent damage to the pickup. H Short circuit round 1. Solder the short circuit round of the flexible wire on the main board.
XM-PX50WT Slit washer Worm gear Shaft holder J Soldering g Prior to performing the following procedures, remove the MD door assembly, the holder assembly, the chassis assembly and the main board. I Removing the spindle motor (See Fig.11) 1. Unsolder the part g on the flexible wire extending from the underside of the Chassis assembly to the spindle motor. ATTENTION: Do not spill flux on the gear and others. 2. Remove the three screws I motor.
XM-PX50WT Removing the feed motor (See Fig.14) 1. Peel off the adhesive tape j on the flexible wire on the underside of the feed motor. j L Soldering k 2. Unsolder soldering k connecting the flexible wire to the feed motor. L 3. Remove the two screws L attaching the feed motor. ATTENTION: When reassembling, reattach the flexible wire with an adhesive tape and solder. Feed motor Chassis assembly Pickup unit Fig.
XM-PX50WT A A Removing the charge board (See Fig.1 to 3) 1. Remove the four screws A on the bottom of the body. 2. Remove the top cover upward while pushing the front part a. Pull out the charge board from the bottom cover. A Fig.1 A Top cover Push Part a Fig.2 Charge board Bottom cover Fig.
XM-PX50WT Adjustment method This model is auto adjustment by Remote Controller. Please adjust the attached remote controller. Equipments----- 1. Remote controller 2. DC power supply 3. Laser power meter 4. MO disc (AU-1) 5. Pre master disc (TGYS 1) Press < PLAY MODE + DISPLAY + BASS > and < PLAY >key together more than 3sec. at power off condition. < VOL > next item .< VOL+ >before item. LCD indication 0. TMD-V2 Test mode setting OK. Indicate at 2sec.
XM-PX50WT Maintenance of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear. Replacement of laser pickup Turn off the power switch and,disconnect the power cord from the ac outlet. Replace the pickup with a normal one.(Refer to "Pickup Removal" on the previous page) 1.
XM-PX50WT Description of major ICs JCV8002-W (IC601) : Head phone amp 1. Pin layout 19 18 ~ 12 13 ~ ~ ~ 24 1 6 7 2. Block diagram PW SW 18 MT TC 19 MT 17 SW PW SW MT SW 16 BST SW BST SW BEEP IN 15 14 13 Vref IN GND BEEP Vref 12 Vref V CC1 20 11 ADD IN IN B 21 10 BST1 BST NF1 IN A 22 9 LPF2 BEEP OUT B BST2 PW A 23 PW B 8 BST NF2 BEEP OUTA 24 V CC2 1 CUTA 2 PWR GND 3 OUT B BST AGC 4 DET 5 AGC IN 7 6 BST OUT 3. Pin function Pin Symbol no.
1-14 VCREF OSC SLOPE CLOCK RESET FG FG2 FC Full Wave Rectifilter PGND GND CF Sample and Hard RF WOUT VOUT 13 UOUT 48 VCONT F/R Controllor Sensoeless Logic ~ COM WIN ~ VIN UIN ~ PWM WF VS Voltage Driver VF 24 BRAKE CPOUT COMFUF 37 S/S CP3 Charge Pump CP2 ~ 1/8 VCO VCO CP1 CPC3 2. Block diagram Phase Comparator RMIN CPC2 1 Timing controllor VCOIN CPC1 36 CLKSEL MCLOCK VCC RMAX XM-PX50WT CXA8059Q (IC450) : Motor driver 1.
XM-PX50WT 3.Pin function Pin Symbol no. 1 2 3 4 5 6 7 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 PGND COM VS CPOUT CPC3 CP3 CPC2 CP2 CPC1 CP1 GND S/S BRAKE VCONT VCREF FC CF FG FG2 VCO RMAX RMIN VCOIN CLKSEL OSC SLOPE CLOCK GND WF VF UF COMF VCC MCLOCK VS RESET RF NC NC WIN WOUT VIN VOUT UIN UOUT NC NC RF Function The GND to guard the power stage. The terminal to detect the voltage.
XM-PX50WT CXD2672GA(IC351):DSP 1.
XM-PX50WT 2.
XM-PX50WT 2.
XM-PX50WT 2.Pin function (4) Pin No.
XM-PX50WT AK93C55BH-W (IC502) : EEPROM 1. Pin layout 2.Pin function CS 1 8 VCC SK 2 7 NC DI 3 6 PE DO 4 5 GND Pin name CS SK DI DO PE VCC GND NC Fnction Chip select Serial data clock Serial data input Serial data output Program enable Ground Power supply Not connected 3. Block diagram DO DATA REGISTER DI INSTRUCTION REGISTER INSTRUCTION DECODE, CONTROL AND CLOCK GENERATION 16 R/W AMPS AND AUTO ERASE 16 EEPROM 2048bit ADD.
WBLADJ TE CSLED SE ADIN ADAGC ADFG AUX FE ABCD BOTM CXA2588R (IC300) : RF amp. 1.
XM-PX50WT IC-PST3421U-X(IC504):System reset 1.Pin layout 2.Pin function VOUT 1 VDD 2 4 VSS 3 NC Pin No. Symbol 1 2 3 4 VOUT VDD NC VSS Function Reset signal output terminal Power supply terminal Non connect VSS terminal 3.Block diagram VDD 2 1 VOUT Vref VSS 4 TK11223BMC-X (IC961) : Regulator 1. Pin layout VIN GND VOUT 6 5 4 1 2 3 CONT GND NOISE BYPASS 2. Block diagram VOUT VIN THERMAL SENSOR CONT.
PGND L 26 X 25 VD4 27 X:Don't Care Z:High Impedance FO L L H L L Z FO4 RO4 VD4 23 RI L H L H X X 24 PGND 30 FI L L H H X X RI4 19 VG RO3 19 20 21 22 23 24 25 26 27 28 29 30 31 32 INPUT FI4 20 Pre-driver Pre-driver Control Vc FO3 29 VD3 28 OE L L L L H X 31 VD3 32 18 17 16 15 14 13 12 11 10 9 8 7 6 33 34 35 36 PS,OE RI3 22 Control VG PGND 12 VD2 10 RO2 VD2 14 FO2 RGND 7 11 RO1 8 13 FO1 VD1 9 6 VD1 5 AGND 5 4 3 2 1 PS H
XM-PX50WT UPD784225GK-617C(IC501):CPU 1.Pin layout 80 ~ 61 60 1 ~ ~ 41 20 21 ~ 40 2.Pin function 1-24 Pin No.
XM-PX50WT XC6367A251M-X(IC901):Regulator 1.Pin layout 2.Pin function 5 4 Pin No. Symbol 1 VOUT 2 VDD 3 CE 4 GND 5 EXT 1 2 Function Output voltage det. Power supply Chip enable GND Ext. Tr connect 3 3.Block diagram Phase Compensation VOUT Error Amp.
2-2 W,V,U COM SLD SPINDLE MOTOR CN301 FEED MOTOR PICKUP SLD SPFD,SPRD SPFG,XBCK SS IC450 SPINDLE DRIVER W,V,U,COM TRK FCS IC400 PS DRIVER FS4 FFDR FRDR TFDR TRDR SFDR SRDR AOUTL AOUTR XRST2 LDON RFI,VC,PEAK,BOTM,ABCD,FE AUX1,ADFG,SE,T,E,F0CNT APCREF,DTRF,CKRF,XLRF IC300 RF IC501 CPU IC351 DSP CSI CSL DO,DI SLCK SWDT SRAT SQSY XINT SENS MNT3 MNT0 SLOFF XLAT XRST Lch,Rch IC502 EEPROM RMDATA MUTE BEEP PSW AOUTL IC601 AOUTR HP AMP XM-PX50WT Block diagram J101 CN601 CN401
XM-PX50WT Standard schematic diagrams Main amp section Standard schematic diagrams MUTE 100 R371 10K R372 100K R364 C371 0.01 470P 0.47 C372 R373 680K 3.3K C374 R380 150 1M R377 1K C376 0.47 1K C377 0.015 6 R379 R378 R376 PSW C373 1 Main amp section RFI R601 470k C614 4.7/4 R603 470k C613 10/6.3 NTCT C313 0.22 C357 1/16 R366 SPFD 10K SPFG F0CNT OUTB 0.22 R113 10k R213 10k TP902 R909 120K 4.7K R966 TP901 D901 10K 10K NI L902 L901 BT1 C901 47/6.
XM-PX50WT XM-PX50WT Charger section Q1 P1 R17 6.8k R4 QNA0025-001 SSM3J01F-X 1M 6 J1 Q6 KTB772/Y/ LV32351-001A 4.7/10 C9 0.01 R21 220k C3 220P R6 47k R22 IC1 BA10324AF-W Q3 D2 LV32351-001A 470 10k IC1 C1 R7 P3 R34 10k Q7 MTZJ3.9B-T2 R8 5 270k 10k 0.068/16 100k LV32351-001A C14 R18 R36 220/16 P2 10k 100k R5 C2 R2 R11 Q4 82k R9 BA10324AF-W D1 IC1 3 TLSU126-T 560 R10 R31 120 C4 4 1/16 1k R15 100k 43k R28 82 R12 R27 10k R16 0.
XM-PX50WT Printed circuit boards C454 R455 C450 R450 R451 CN301 R527 R352 R314 C308 C312 C3 C2 C371 C373 C372 R376 C377 R379 C319 C212 C924 IC921 R524 IC901 C901 R901 C902 C509 Q906 R521 C510 IC505 C604 C112 L602 R518 IC601 R966 R965 Q965 R922 D501 C921 C351 C354 R923 Q502 C613 C923 R386 C500 R509 C614 Q60 R65 K602 R613 K604 R60 R63 C504 R507 R516 X500 TH501 C508R506R510 L501 R517 R528 R529 Q964 Q901 R519R520 C511 Q5 C12 R27 R9 R8 IC1 B3 P1 R16 R15 D3
XM-PX50WT XM-PX50WT < MEMO > 6 5 4 3 2 1 A B C D E 2-6 F G H I
XM-PX50WT PARTS LIST [ XM-PX50WT ] * All printed circuit boards and its assemblies are not available as service parts.
XM-PX50WT Exploded view of general assembly and parts list Block No.
XM-PX50WT Parts list (General assembly) A Item Parts number Block No.
XM-PX50WT Charger assembly and parts list Block No. M 2 M M 4 6 7 8 5 Charger board 1 3 3 2 2 3 Parts list (Charger) A 3-4 Item Block No.
XM-PX50WT MD mechanism assembly and parts list FLM-FPM Block No. M 2 M M 3 Grease 2 = FL-7750 = CFD-4007HY2 = FG-87HS = 948P 15 16 1 Both side 8 9 10 2.1 +- 0.1mm 10 9 8 11 12 13 17 5 6 14 14 7 Parts list (MD mechanism) A Item Block No. M3MM Parts number Parts name Description Q'ty 1 LV20882-001A CHASSIS ASS'Y 1 2 QAR0113-001 FEED MOTOR 1 3 QYSPSFT1425M MINI SCREW 2 (M1.4 PX2.
XM-PX50WT Electrical parts list (Main board) A 3-6 Item Parts number Parts name Block No.
XM-PX50WT Electrical parts list (Main board) A Item Parts number Parts name Block No.
XM-PX50WT Electrical parts list (Jack board) A Item J 101 Parts number QNS0098-002 Parts name 3-8 Item Remarks Area 3.5 JACK Electrical parts list (Charger board) A Block No. 02 Parts number Parts name C 1 QETN1CM-227Z E CAPACITOR C 2 NCF21AZ-475X C CAPACITOR C 3 NCS31HJ-221X C CAPACITOR C 4 NCF21CZ-105X C CAPACITOR C 9 NCB31HK-103X C CAPACITOR C 11 NCB31HK-103X C CAPACITOR C 14 NCB31CK-683X C CAPACITOR D 1 TLSU126-T LED D 2 MTZJ3.
XM-PX50WT Packing materials and accessories parts list Block No. M 4 M M Block No. M 5 M M A2 A3 A9 A1 A4 A5 P3 A6 A7 A8 P1 P2 Parts list (Packing) A Item Parts number Block No. M4MM Parts name Description Q'ty P 1 LV30245-003A POLY BAG 1 FOR SET P 2 LV32550-002A PACKING CASE 1 P 3 QPA01202505 POLY BAG 1 FOR CHARGER Parts list (Accessories) A A Item Parts number Area Block No.
XM-PX50WT VICTOR COMPANY OF JAPAN, LIMITED AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.
