JVC SP-WA25 Service Manual Download Page 23 | Manualshive

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(No.MB141)1-23

5.2.7 Tracking Servo Does Not Work

(CD)

(DVD Single)

(DVD Dual)

(CD-RW)

Tracking Servo Does not Work

Check Voltage of

PI(pin36 of RIC1) is

normal

Is TE(pin41 of RIC1)

normal?

Check peripheral circuit or RCN1 and

DRIC1

Check connection between PCB
and MECHA

Disc Judgment Error

Check peripheral circuit or RIC1

Change PickUp or RIC1

Change SIC1

Y

Y

N

N

7

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Summary of Contents for SP-WA25

Page 1: ... DVD DIGITAL THEATER SYSTEM MB141 2003 12 TH A25 TABLE OF CONTENTS 1 PRECAUTION 1 3 2 SPECIFIC SERVICE INSTRUCTIONS 1 6 3 DISASSEMBLY 1 7 4 ADJUSTMENT 1 13 5 TROUBLESHOOTING 1 14 Area suffix J U S A C Canada SOUND VOLUME SOURCE STANDBY STANDBY ON DVD DIGIT AL CINEMA SYSTEM TH A25 ...

Page 2: ... OUT Y 1 0 V p p 75 Ω PB PR 0 7 V p p 75 Ω Tuner Tuning Range FM 87 50 MHz 108 00 MHz AM 530 kHz 1 710 kHz Usable Sensitivity FM 8 0 dBf 0 9 µV 75 Ω AM loop antenna 650 µV m General Readable Discs DVD VIDEO Video CD Super Video CD Audio CD CD R RW Audio CD Video CD Super Video CD MP3 JPEG DVD R RW Video format Power Requirements AC 120 V 60 Hz Power Consumption 110 W at operation 2 W in standby mo...

Page 3: ...ack control shafts etc to be sure the product is safe to operate without danger of electrical shock Do not use a line isolation transformer during this check Plug the AC line cord directly into the AC outlet Using a Leakage Current Tester measure the leakage current from each exposed metal parts of the cabinet particular ly any exposed metal part having a return path to the chassis to a known good...

Page 4: ...on Refer to the text 2 Do not use a tester to check the condition of the laser diode in the optical pickup The tester s internal power source can easily destroy the laser diode 1 5 4 Handling the traverse unit optical pickup 1 Do not subject the traverse unit optical pickup to strong shocks as it is a sensitive complex unit 2 Remove solder of the short lands on the flexible wire after replacing th...

Page 5: ... for AFS1 T5A 125V for AFS2 T160mA 250V for AFS3 and T80mA 250V for AFS4 This symbol specifies type of fast operating fuse Precaution Pour eviter risques de feux remplacez le fusible de surete de AFS1 comme le meme type que T1 25A 250V et T5A 125V pour AFS2 et T160mA 250V pour AFS3 et T80mA 250V pour AFS4 Ce sont des fusibles suretes qui functionnes rapide ...

Page 6: ...1 6 No MB141 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS ...

Page 7: ...y remove the four screws A attaching the top cover See Fig 1 2 From the back side of the main body remove the four screws B attaching the top cover See Fig 2 3 Take out the top cover in the upward direction while ex tending the lower sections of the top cover in the direction of right and left Fig 1 Fig 2 Top cover A A Top cover Rear panel B ...

Page 8: ... 3 Release the joints a in an upward direction and take out the tray door See Fig 6 4 Remove the four screws D attaching the DVD mecha nism assembly See Fig 6 5 Disconnect the wires from the connectors AJ1 AJS1 and PCN1 on the DVD mechanism assembly and take out the DVD mechanism assembly See Fig 6 6 Push in the disc tray while lifting the section b See Fig 5 Reference When pushing in the disc tra...

Page 9: ...ront panel assembly See Fig 9 4 Release the joints d in forward direction and take out the front panel assembly See Fig 9 3 1 5 Removing the tuner pack See Figs 8 and 10 Prior to performing the following procedures remove the top cover 1 From the top side of the main body disconnect the card wire from the connector VW4 on video board See Fig 8 2 Remove the screw G attaching the tuner pack See Fig ...

Page 10: ...connector UW7 and UW8 on the function board and turn over the video board 4 From the reverse side of the video board disconnect the card wire from the connector VW3 on the video board and take out the video board Reference Remove the tie band as required Fig 12 3 1 9 Removing the function board See Fig 13 Prior to performing the following procedures remove the top cover fan motor rear panel and vi...

Page 11: ...main board Reference When attaching the screw P attach the wire clamp together with it After connecting the wire to the connector ACW2 bundle the wire using the wire clamp 3 1 11 Removing the power trans See Fig 14 Prior to performing the following procedures remove the top cover tray door DVD mechanism assembly fan motor rear panel video board and function board 1 From the top side of the main bo...

Page 12: ...attaching the FRONT board 2 Disconnect the wire from the connector UCW13 on the front board 3 Take out the front board from the front panel assembly 3 2 2 Removing the power SW board See Fig 15 Prior to performing the following procedures remove the top cover tray door front panel assembly and front board 1 Remove the screw S attaching the power SW board 2 Take out the power SW board from the fron...

Page 13: ... No MB141 1 13 SECTION 4 ADJUSTMENT This service manual does not describe ADJUSTMENT ...

Page 14: ...ctor from DSP PCB to FRONT PCB VCW7 Check normal Voltage at POWER PCB AZD1 5 1V 1 2W Check pattern from VCW7 to pin 77 of UIC1 Replace Micom UIC1 If High Voltage 5V check for Circuit protection Check connector wire Ass y of power P T MAIN PCB 7P ACW3 MAIN PCB 8P PW3 Replace AZD1 Check resistant from GND to pin 77 of MICOM UIC1 if the short 0 ohm to replace Micom UIC1 Check for Input voltage at POW...

Page 15: ...Check Connector PW1 Check ABD2 4 Check Audio channel at CW5 for input 5 1 channel Audio signal Check signal for FR FL C W RL RR at MAIN PCB Check voltage for CW7 SPK Relay High 5V Check Q4 Q5 Check circuit for AMP channel Out ports of FIC6 IC7 RIC5 Reference to NEXT page A position Check circuit for Speak Relay ...

Page 16: ...VL Check voltage for IC4 12V Check circuit for voltage 12V Check ABD2 4 Check circuit for DC Voltage Replace P T Q15 Check circuit for Diode behind position Check normal condition for Q15 C945 temperature sense S W be operated in the Power Trans is Turn on Check DC Voltage for Speaker port Check the parts is normal ZD6 ZD5 3 9V Check electric potention for PBD1 ABD1 PD3 at DVD Power PCB R33 R36 27...

Page 17: ...13 A733 at Main PCB 5 1 3 3 Check the Connector Wire Ass y Connectin of each PCB Check the Turn on for channel of Q35 C945 Check circuit for channel Turn on according feedback A position of previous page DVD MECHA Main PCB 8P PW3 POWER TRANS Main PCB ACW3 ...

Page 18: ... DVD single or Dual layer judgement CD or CDRW judgement DVD single initial setting DVD Dual initial setting To Each disc playback CD initial setting CDRW initial setting DVD Single Dual CD CD CDRW Is Tray closed Tray close operation about 3sec Is Tray closed Stop Close operation Wait Open Command from MPEG Laser Off Monitor Display NO DISC Pick up headinitial position ...

Page 19: ...sc Motor forced accelleration Repeat seveal times Change Disc Type Focus Seach Track servo ON CLV servo ON Read TOC Automatic Adjustment Automatic Adjustment is done once when the disc is replaced Is focus servo on Search Picture appears 6 7 8 5 ...

Page 20: ...ection Does Pick Up Move to out direction again Does Laser Turn On Check voltage at pin8 of RCN1 is about 2 5V Check BUS line between RIC1 and SIC1 SIC1 and MIC1 Is pulse of 2 5 2 5V developed at pin3 4 of MJ4 Is pulse of 2 5 2 5V developed at pin13 of SIC1 Is pin5 of MJ4 L appeared Replace Pick Up Head Check line between SIC1 and MJ4 Check connection between PCB and MECHA Check connection between...

Page 21: ... focus direction Is focus search voltage developed at pin 11 of SIC1 Check PI pin36 of RU1 signal and FE pin42 of RIC1 signal Y N N N No Disc OK Check connection between RIC1 and RCN1 Check BUS line RIC1and SIC1 Check RIC1 Check peripheral circuit of DRIC1 Check BUS line between SIC1 and MIC1 Y Y No signal Normal Disc is presence 4 ...

Page 22: ... Check peripheral circuit of SIC1 Check SIC1 Check peripheral circuit of DRIC1 Y N 5 CD RW DVD Dual DVD Single CD Focus Servo does not Work Check peripheral circuit of SIC1 and RIC1 Check peripheral circuit of SIC1 and RIC1 Check Connection between PCB and MECHA Check peripheral circuit of DRIC1 Are FE pin42 of RIC1 and PI pin36 of RIC1 normal N Y 6 ...

Page 23: ... Tracking Servo Does not Work Check Voltage of PI pin36 of RIC1 is normal Is TE pin41 of RIC1 normal Check peripheral circuit or RCN1 and DRIC1 Check connection between PCB and MECHA Disc Judgment Error Check peripheral circuit or RIC1 Change PickUp or RIC1 Change SIC1 Y Y N N 7 ...

Page 24: ...ot Work CLV Servo Does not Work Is XSRFIN pin2 of SIC1 normal Is RF pin21 of RCN1 normal Check connection between PCB and MECHA Check peripheral circuit of SIC1 Check peripheral circuit of DRIC1 Check peripheral circuit of RIC1 8 N N Y Y ...

Page 25: ... Y Y N N N N WAIT 2 3 POWER ON Check Reset Voltage at 24pin of U13 Check Servo parts and MPEG ATAPI Line Check Servo spindle motor parts Check Pick up Lens and Pick up Flat Cable LOGO ON NO DISC DISPLAY in time of absence Loading Play OK Audio out in normal in time of presence ...

Page 26: ... 2 Check 27MHZcrystal FIg 1 Check 114MHZ pin102 of U13 Video OK Check Video signal of VQ1 VQ3 VQ4 VQ5 VQ6 Fig 1 OK Check Voltage of REG2 2 85V REG3 3 50V N N Y Y 3 Check NEW DSP Parts Check MainAMPparts Check Audio Digital signal at pin 33 36 37 of U13 Audio out OK ...

Page 27: ... No MB141 1 27 ...

Page 28: ... No MB141 AV MULTIMEDIA COMPANY AUDIO VIDEO SYSTEMS CATEGORY 10 1 1chome Ohwatari machi Maebashi city 371 8543 Japan VICTOR COMPANY OF JAPAN LIMITED WPC Printed in Japan ...

Page 29: ...MPANY OF JAPAN LTD TH A25 Contents Block diagram Standard schematic diagrams Printed circuit boards 2 1 2 3 2 13 to 21 CD ROM No SML200312 Area suffix J U S A C Canada DVD DIGITAL THATER SYSTEM SOUND VOLUME SOURCE STANDBY STANDBY ON DVD DIGITAL CINEMA SYSTEM TH A25 ...

Page 30: ...e silk screen printed side parts side of the PWB diagrams the parts that are printed over with black such as the resistor diode and ICP or identified by the mark nearby are critical for safety This regulation does not correspond to J and C version ...

Page 31: ... M E M O ...

Page 32: ...ICAL IN DVD PACK BA4560 MIXER BA4560 MIXER FL RL C FR RR S W LPF LPF LPF LPF LPF LPF LPF LPF LPF FRONT L FRONT R REAR L REAR R CENTER SUB WOOFER CLK CODEC STAC9460S CS8415 DIR ESS MPEG TUNER AUX TUNER L AUX L TUNER R AUX R ...

Page 33: ...AND DO1 DI1 CE1 CLK TDA7440 E VOL R L X L R R X R RL IN RR IN C IN S W IN CLK RL RR C S W M62446AFP VOLUME TONE POWER AMP 6 OHM 30 W FRONT L CH POWER AMP 6 OHM 30 W FRONT R CH POWER AMP 6 OHM 30 W REAR L CH POWER AMP 6 OHM 30 W REAR R CH POWER AMP 6 OHM 30 W Center POWER AMP 3 OHM 50 W SUB WOOFER ...

Page 34: ...2 3 Parts are safety assurance parts When replacing those parts make sure to use the specified one To UW2 SHEET 2 To UW1 SHEET 2 Standard schematic diagrams Main section ...

Page 35: ...2 4 SHEET 1 To UW3 SHEET 2 To PCN1 SHEET 4 ...

Page 36: ...2 5 To VW1 SHEET 3 To AJS1 SHEET 5 To UCW7 SHEET 3 Function section ...

Page 37: ...2 6 SHEET 2 To VW2 SHEET 3 To CW6 SHEET 1 To CW7 SHEET 1 To CW5 SHEET 1 ...

Page 38: ...2 7 Front display section To UW4 SHEET 2 ...

Page 39: ...2 8 SHEET 3 Video section To UW7 SHEET 2 To UW8 SHEET 2 To AJ1 SHEET 5 To TUNER ...

Page 40: ...2 9 DVD loader section To PW3 SHEET 1 ...

Page 41: ...2 10 SHEET 4 ...

Page 42: ...2 11 DVD MPEG DEC section ...

Page 43: ...2 12 To UW6 SHEET 2 To VW3 SHEET 3 SHEET 5 ...

Page 44: ...2 13 Printed circuit boards Main board ...

Page 45: ...2 14 ...

Page 46: ...2 15 Forward side Reverse side Function board ...

Page 47: ...2 16 side se side ...

Page 48: ...2 17 Forward side Reverse side Front board FL board FL board Power SW board ...

Page 49: ...2 18 Power SW board ...

Page 50: ...2 19 Forward side DVD servo control board ...

Page 51: ...2 20 Reverse side ...

Page 52: ...Video board 2 21 ...

Page 53: ... M E M O ...

Page 54: ...lies are not available as service parts Contents Exploded view of general assembly and parts list Block No M1 Electrical parts list Block No 01 05 Packing materials and accessories parts list Block No M3 TH A25 3 2 3 5 3 16 Area suffix J U S A C Canada MB141 ...

Page 55: ...smbly and parts list 11 5 6 10 7 8 9 34 3 2 1 4 12 47 14 15 23 20 19 22 24 13 49 49 48 52 54 51 35 Block No M M M 1 9 45 46 52 52 52 52 51 52 46 9 DVD pack DVD board Front board Tuner pack M Video bo Function board 52 21 51 50 50 53 ...

Page 56: ...3 3 34 22 33 40 41 42 32 31 30 28 27 29 20 19 18 38 26 25 16 9 44 22 4 52 51 54 54 54 17 35 49 49 M M 46 52 Power trans pack Main board Video board 52 21 53 53 ...

Page 57: ...01140A BRKT PCB x2 23 AH61 01355A BRKT TUNER 24 AH63 00278H COVER FUSE 25 AH61 00855A HOLDER IC 26 AH61 00779A HOLDER IC x5 27 AH64 02648B CABINET REAR 28 AH63 00384A SHIELD SPK8 29 AH63 00385A SHIELD SPK4 30 AH31 00039A MOTOR FAN 31 AH63 00517A COVER FAN 32 AH64 02315B CABINET TOP 33 AH39 00258U POWER CORD 34 AH63 00632B SHIELD FRONT L 35 AH63 00632C SHIELD FRONT R 38 AH68 01348B LABEL RATING A25...

Page 58: ...ANSISTOR Q23FR 0501 000010 TRANSISTOR Q23RL 0501 000010 TRANSISTOR Q23RR 0501 000010 TRANSISTOR Q25FL 0501 000010 TRANSISTOR Q25FR 0501 000010 TRANSISTOR Q25RL 0501 000010 TRANSISTOR Q25RR 0501 000010 TRANSISTOR Q26FL 0501 000294 TRANSISTOR Q26FR 0501 000294 TRANSISTOR Q26RL 0501 000294 TRANSISTOR Q26RR 0501 000294 TRANSISTOR Q28FL 0501 000294 TRANSISTOR Q28FR 0501 000294 TRANSISTOR Q28RL 0501 000...

Page 59: ...Part No Part Name Description Local C44FR 2203 000710 CHIP CAPACITOR C44RL 2203 000710 CHIP CAPACITOR C44RR 2203 000710 CHIP CAPACITOR C47FL 2301 000375 M CAPACITOR C47FR 2301 000375 M CAPACITOR C47RL 2301 000375 M CAPACITOR C47RR 2301 000375 M CAPACITOR C49FL 2203 000236 CHIP CAPACITOR C49FR 2203 000236 CHIP CAPACITOR C49RL 2203 000236 CHIP CAPACITOR C49RR 2203 000236 CHIP CAPACITOR R10 2007 0002...

Page 60: ...HIP RESISTOR R79F 2007 000267 CHIP RESISTOR Symbol No Part No Part Name Description Local R79L 2007 000267 CHIP RESISTOR R79W 2007 000267 CHIP RESISTOR R80C 2007 001039 CHIP RESISTOR R80F 2007 001039 CHIP RESISTOR R80L 2007 001039 CHIP RESISTOR R80W 2007 001039 CHIP RESISTOR R81C 2007 000872 CHIP RESISTOR R81F 2007 000872 CHIP RESISTOR R81L 2007 000872 CHIP RESISTOR R81W 2007 000300 CHIP RESISTOR ...

Page 61: ...IL AL3C AH27 90001A COIL AL3W AH27 90001A COIL Symbol No Part No Part Name Description Local AL3FL AH27 90001A COIL AL3FR AH27 90001A COIL AL3RL AH27 90001A COIL AL3RR AH27 90001A COIL AQ2 0501 000010 TRANSISTOR AQ3 0501 000010 TRANSISTOR AR2 2001 000890 C RESISTOR AR3 2001 000449 C RESISTOR AR4 2001 000052 C RESISTOR AR5 2007 000300 CHIP RESISTOR AR6 2007 000941 CHIP RESISTOR AR7 2001 001045 C RE...

Page 62: ...1 0401 001090 FR DIODE UD12 0401 000101 FR DIODE UD77 0401 001090 FR DIODE UIC1 AH11 00106A MASK ROM UQ3 0504 000156 DIGI TRANSISTOR UQ4 0501 000398 TRANSISTOR UR1 2001 000023 C RESISTOR UR2 2001 000023 C RESISTOR UR10 2007 000300 CHIP RESISTOR UR11 2007 000822 CHIP RESISTOR UR12 2007 000822 CHIP RESISTOR UR13 2007 000872 CHIP RESISTOR UR14 2007 000682 CHIP RESISTOR UR15 2007 000493 CHIP RESISTOR ...

Page 63: ... 000588 E CAPACITOR FC44R 2401 000588 E CAPACITOR FD5 0401 001090 FR DIODE FIC2 BA4560 IC 1201 000163 FIC3 TDA7440D IC 1204 001465 FIC4 BA4560 IC 1201 000163 FIC5 M62446AFP IC 1201 000163 FIC6 BA4560 IC 1201 000163 FIC9 BA4560 IC 1201 000163 FJ1 2007 000070 CHIP RESISTOR FJ2 2007 000070 CHIP RESISTOR FQ3 0501 000341 TRANSISTOR FQ4 0501 000341 TRANSISTOR FR7 2007 000094 CHIP RESISTOR FR8 2007 00009...

Page 64: ... RESISTOR UR511 2007 000082 CHIP RESISTOR UR512 2007 000082 CHIP RESISTOR UR513 2007 000090 CHIP RESISTOR UR514 2007 000090 CHIP RESISTOR UR517 2007 000124 CHIP RESISTOR UR518 2007 000090 CHIP RESISTOR UR519 2007 000090 CHIP RESISTOR UR520 2007 000124 CHIP RESISTOR UR521 2007 000090 CHIP RESISTOR UR522 2007 000090 CHIP RESISTOR UR524 2007 000090 CHIP RESISTOR UR525 2007 000078 CHIP RESISTOR UW1 37...

Page 65: ...280 CHIP CAPACITOR VC1 2402 000107 E CAPACITOR SMD VC2 2203 005005 CHIP CAPACITOR Symbol No Part No Part Name Description Local R1 2007 000075 CHIP RESISTOR R2 2007 000118 CHIP RESISTOR R14 2007 001042 CHIP RESISTOR R19 2007 000084 CHIP RESISTOR R22 2007 000113 CHIP RESISTOR R23 2007 000074 CHIP RESISTOR R24 2007 000074 CHIP RESISTOR R25 2007 000074 CHIP RESISTOR R26 2007 000078 CHIP RESISTOR R27 ...

Page 66: ...PACITOR DC17 2203 005005 CHIP CAPACITOR Symbol No Part No Part Name Description Local DC18 2203 005005 CHIP CAPACITOR DC19 2203 005005 CHIP CAPACITOR DR1 2007 000097 CHIP RESISTOR DR2 2007 000090 CHIP RESISTOR DR5 2007 000134 CHIP RESISTOR DR6 2007 000090 CHIP RESISTOR DR7 2007 000097 CHIP RESISTOR DR8 2007 000134 CHIP RESISTOR DR10 2007 000113 CHIP RESISTOR DR11 2007 000091 CHIP RESISTOR DR12 200...

Page 67: ...SISTOR Symbol No Part No Part Name Description Local RR14 2007 000124 CHIP RESISTOR RR15 2007 000090 CHIP RESISTOR RR16 2007 000090 CHIP RESISTOR RR18 2007 000075 CHIP RESISTOR RR19 2007 000090 CHIP RESISTOR RR20 2007 000074 CHIP RESISTOR RR21 2007 000070 CHIP RESISTOR RR23 2007 000090 CHIP RESISTOR RR24 2007 000078 CHIP RESISTOR RR25 2007 000098 CHIP RESISTOR RR26 2007 000088 CHIP RESISTOR RR27 2...

Page 68: ...0816 R NET TN11 2011 000816 R NET TN12 2011 000816 R NET TN13 2011 000816 R NET U11 74HCT245 IC 0801 002683 U13 ESS6028F IC AH09 00089A U14 H1606 IC 1105 001369 U15 M29W800DT IC 1107 001416 U16 S524A40X21 SCT0 IC 1103 001292 U17 74LCX157 IC 0801 002518 VL1 2703 000125 INDUCTOR SMD VL2 2007 000029 CHIP RESISTOR VL3 3301 001495 BEAD SMD VQ1 0501 000314 TRANSISTOR VQ3 0501 000314 TRANSISTOR VQ4 0501 ...

Page 69: ...3 16 Packing materials and accessories parts list Block No A1 A3 A4 A5 A6 A7 A8 A9 A2 M M M 3 A11 P7 P1 P4 P2 P5 P6 P8 P9 A10 P3 ...

Page 70: ...0416B IMPORTANT CARD A25C A 6 AH68 00415J IMPORTANT CARD A25J A 7 AH68 00416A SAFETY CARD A25J A 8 AH39 40001V CABLE AUDIO A 9 AH68 00415A WARANTY CARD A25C A 10 AH81 01308B SATELLITE SPEAK x5 A 11 AH81 01308H SUBWOOFER P 1 AH69 01031A CUSHION L P 2 AH69 01032A CUSHION R P 3 6902 000063 BAG PE SET P 4 6902 000385 BAG PE I B P 5 AH81 01308N CUSHION TOP P 6 AH81 01308P CUSHION BOTTOM P 7 AH81 01308R...

Page 71: ...VICTOR COMPANY OF JAPAN LIMITED No MB141SCH Printed in Japan WPC AV MULTIMEDIA COMPANY AUDIO VIDEO SYSTEMS CATEGORY 10 1 1chome Ohwatari machi Maebashi city 371 8543 Japan ...

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