JVC KW-XC888 Service Manual

Cd/cassette receiver
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SERVICE MANUAL
7
2004
MA081
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42
CD/CASSETTE RECEIVER
KW-XC888

TABLE OF CONTENTS

COPYRIGHT © 2004 Victor Company of Japan, Limited
Area suffix
UN --------------------------Asean
No.MA081
2004/7

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Summary of Contents for JVC KW-XC888

  • Page 1: Table Of Contents

    SERVICE MANUAL CD/CASSETTE RECEIVER MA081 2004 KW-XC888 Area suffix UN --------------------------Asean TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION AUDIO AMPLIFIER SECTION Maximum Power Output (DC 16V) Front 50 W per channel Rear 50 W per channel 25 W per channel into 4 Ω. Continuous Power Output (10% THD) Front 25 W per channel into 4 Ω. Rear 4 Ω...
  • Page 3: Precaution

    SECTION 1 PRECAUTION Safety Precautions Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.
  • Page 4 Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.2.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.
  • Page 5 Important for laser products 5.CAUTION : If safety switches malfunction, the laser is able 1.CLASS 1 LASER PRODUCT to function. 2.DANGER : Invisible laser radiation when open and inter 6.CAUTION : Use of controls, adjustments or performance of lock failed or defeated. Avoid direct exposure to beam. procedures other than those specified here in may result in 3.CAUTION : There are no serviceable parts inside the hazardous radiation exposure.
  • Page 6: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MA081)
  • Page 7: Disassembly

    SECTION 3 DISASSEMBLY Main body section 3.1.1 Removing the front panel assembly (See Figs.1 and 2) (1) From the both side of the main body, remove the two screws A attaching the front panel assembly. (See Figs.1 Front panel assembly and 2.) (2) Release the four joints a and remove the front panel as- sembly in the direction of the arrow.
  • Page 8 3.1.2 Removing the heat sink (See Figs.3 and 4) (1) From the back side of the main body, remove the six screws B attaching the heat sink. (See Fig.3.) Rear bracket (2) Remove the heat sink from the main body. heat sink Note: •...
  • Page 9 3.1.4 Removing the bottom chassis assembly (See Fig.5) • Prior to performing the following procedures, remove the front panel assembly, heat sink and rear bracket. Bottom chassis assembly (1) From the bottom side of the main body, remove the four screws D attaching the bottom chassis assembly.
  • Page 10 3.1.6 Removing the cassette mechanism assembly (See Fig.7) • Prior to performing the following procedures, remove the front panel assembly, heat sink, rear bracket and bottom chassis Mechanism control board assembly. (1) From the inside of the bottom chassis assembly, discon- Cassette mechanism assembly nect the card wire from the connector CN403...
  • Page 11 3.1.8 Removing the main board (See Fig.9) • Prior to performing the following procedures, remove the front panel assembly, heat sink, rear bracket, bottom chassis as- Main board sembly and middle chassis assembly. (1) From the top side of the middle chassis assembly, remove the four screws H attaching the main board on the middle chassis.
  • Page 12: See Figs.1 And

    CD Mechanism Assembly 3.2.1 Removing the top cover (See Figs.1 and 2) (1) Remove the two screws A on the both side of the body. (2) Lift the front side of the top cover and move the top cover backward to release the two joints a. Top cover Joints a Fig.1...
  • Page 13 3.2.2 Removing the connector board Wires (See Figs.3 to 5) CAUTION: Before disconnecting the flexible wire from the pickup, solder the short-circuit point on the pickup. No observance of this in- struction may cause damage of the pickup. (1) Remove the screw B fixing the connector board. (2) Solder the short-circuit point on the connector board.
  • Page 14 3.2.3 Removing the DET switch (See Figs.6 and 7) (1) Extend the two tabs c of the feed sw. holder and pull out the switch. (2) Unsolder the DET switch wire if necessary. DET switch Connector board Pickup Fig.6 Tab c DET switch DET switch wire Tab c...
  • Page 15 3.2.4 Removing the chassis unit (See Figs.8 and 9) • Prior to performing the following procedure, remove the top Chassis unit cover and connector board. Suspension spring (L) Suspension spring (R) (1) Remove the two suspension springs (L) and (R) attaching the chassis unit to the frame.
  • Page 16 3.2.5 Removing the clamper assembly (See Figs.10 and 11) • Prior to performing the following procedure, remove the top cover. (1) Remove the clamper arm spring. Clamper arm spring (2) Move the clamper assembly in the direction of the arrow to release the two joints d.
  • Page 17 3.2.6 Removing the loading / feed motor assembly (See Figs.12 and 13) • Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw C and move the loading / feed motor assembly in the direction of the arrow to remove it from the chassis rivet assembly.
  • Page 18 3.2.7 Removing the pickup unit Pickup unit (See Figs.14 to 18) • Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw D and pull out the pu. shaft holder from Part e the pu.
  • Page 19 3.2.9 Removing the trigger arm Joint k (See Figs.19 and 20) • Prior to performing the following procedure, remove the top cover, connector board and clamper unit. (1) Turn the trigger arm in the direction of the arrow to release Trigger arm the joint k and pull out upward.
  • Page 20 3.2.11 Removing the mode sw. / select lock arm Link plate Joint t (See Figs.22 and 23) Mode sw. • Prior to performing the following procedure, remove the top plate assembly. Select lock arm (1) Bring up the mode sw. to release from the link plate (joint t) and turn in the direction of the arrow to release the joint u.
  • Page 21 3.2.12 Reassembling the mode sw. / select lock arm Select lock arm spring (See Figs.24 to 26) Hook w REFERENCE: Reverse the above removing procedure. Joint v (1) Reattach the select lock arm spring to the top plate and set Joint v the shorter end of the select lock arm spring to the hook w on the top plate.
  • Page 22 3.2.13 Removing the select arm R / link plate Link plate Joint c' Joint r (See Figs.27 and 28) Select arm R Joint b' • Prior to performing the following procedure, remove the top plate assembly. (1) Bring up the select arm R to release from the link plate (joint a') and turn as shown in the figure to release the two Joint b' joints b' and joint c'.
  • Page 23 3.2.15 Removing the loading roller assembly Loading roller assembly (See Figs.31 to 33) • Prior to performing the following procedure, remove the Roller guide spring clamper assembly and top plate assembly. (1) Push inward the loading roller assembly on the gear side and detach it upward from the slot of the joint g' of the lock arm rivet assembly.
  • Page 24 3.2.16 Removing the loading gear 5, 6 and 7 Loading gear bracket (See Figs.35 and 36) • Prior to performing the following procedure, remove the top Loading gear 6 cover, chassis unit, pickup unit and top plate assembly. (1) Remove the screw K attaching the loading gear bracket. The loading gear 6 and 7 come off the loading gear brack- (2) Pull out the loading gear 5.
  • Page 25: Loading Gear

    3.2.17 Removing the gears Joint p' (See Figs.37 to 40) • Prior to performing the following procedure, remove the top Change plate rivet assembly cover, chassis unit, top plate assembly and pickup unit. • Pull out the loading gear 3. (See Fig.35.) (1) Pull out the feed gear.
  • Page 26: No.ma081)1

    3.2.18 Removing the turn table / spindle motor Turn table (See Figs.41 and 42) • Prior to performing the following procedure, remove the top cover, connector board, chassis unit and clamper assembly. (1) Remove the two screws L attaching the spindle motor as- sembly through the slot of the turn table on top of the body.
  • Page 27 Cassette mechanism assembly REFERENCE: Prior to performing the following procedures, turn the mode gear on the bottom of the body until the respective part comes to the EJECT position (Refer to Fig.1). Mode gear Fig.1 3.3.1 Removing the cassette guide (See Fig.2) (1) Turn the mode gear to set to RVS play or subsequent Cassette guide...
  • Page 28 3.3.3 Removing the cassette hanger assembly / cassette holder (See Fig.4 to 7) (1) Check the mode is set to EJECT. Push down the front part Cassette holder assembly of the cassette holder and move in the direction of the ar- row to release the joint c.
  • Page 29 3.3.4 Removing the side bracket assembly Side bracket assembly (See Fig.8 to 10) Joint i (1) Remove the screw A attaching the side bracket assembly. (2) Detach the front side of the side bracket assembly upward and pull out forward to release the joint i and j in the rear. Joint j CAUTION: When reassembling, make sure that the boss k of the...
  • Page 30 3.3.5 Removing the pinch arm (F) assembly (See Fig.11 and 12) (1) Remove the polywasher and pull out the pinch arm (F) as- sembly. (2) Remove the compulsion spring. 3.3.6 Removing the pinch arm (R) assembly (See Fig.11 and 12) (1) Remove the polywasher and pull out the pinch arm (R) as- sembly.
  • Page 31 3.3.8 Removing the head / tape guide Flywheel assembly (F) Belt (See Fig.16 and 17) REFERENCE: It is not necessary to remove the slide chassis assembly. (1) Remove the band attaching the wire to the head. (2) Remove the two screws B, the head and the head support spring.
  • Page 32 3.3.10 Disassembling the flywheel assembly (F) FFC pad (See Fig.19 and 20) (1) Push and turn counterclockwise the spring holder (F) to re- lease the three joints p on the bottom of the flywheel. (2) The spring holder (F), the TU spring and the friction gear play come off.
  • Page 33 3.3.13 Removing the gear base arm / gear base link assembly (See Fig.23 to 25) (1) Move the gear base arm in the direction of the arrow. Gear base arm (2) Insert a slotted screwdriver to the gear base spring under Joint t Joints s the gear base arm, and release the gear base arm upward...
  • Page 34 3.3.15 Removing the mode gear Mode gear Mode switch actuator (See Fig.26 and 29) (1) Remove the polywasher on the bottom and pull out the mode gear. 3.3.16 Removing the mode switch actuator (See Fig.26, 27 and 29) (1) Pull out the mode switch actuator at the bottom. REFERENCE: Polywasher When reattaching the mode switch actuator to the main...
  • Page 35 3.3.19 Removing the gear base assembly / take up gear / reflector gear (See Fig.30 to 32) (1) Push in the pin d’ of the gear base assembly on the upper Slot e' side of the body and move the reflector gear toward the bottom, then pull out.
  • Page 36 3.3.21 Removing the side bracket assembly Side bracket assembly (See Fig.33 to 37) Boss g' (1) Remove the eject cam plate spring. (2) Push the joint f’ through the slot to remove the load rack downward. (3) Move the eject cam limiter in the direction of the arrow to release it from the boss g’...
  • Page 37 3.3.22 Removing the main motor assembly / sub motor assembly (See Fig.38 to 40) (1) Remove the belt at the bottom. Main motor (2) Remove the polywasher and pull out the mode gear. assembly (3) Pull out the reduction gear (B). Reduction gear (B) (4) Remove the polywasher and pull out the reduction gear Belt...
  • Page 38: Adjustment

    VT739:For playback frequency measurement VT712:For wow flutter & tape speed measurement VT703:For head azimuth measurement (6) Torque gauge:Cassette type for CTG-N(Mechanism adjustment) (7) Test disc (JVC:CTS1000) 4.1.2 Measuring conditions (Amplifier section) Power supply voltage :DC14.4V(11 to 16V allowance) Load impedance :4Ω...
  • Page 39 4.1.4 Information for using a car audio service jig (1) We're advancing efforts to make our extension cords common for all car audio products. Please use this type of extension cord as follows. (2) As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the mechanism assembly after disassembly.
  • Page 40 4.1.6 Arrangement of adjusting & test points Cassette mechanism (Surface) Motor assembly Tape speed adjust Azimuth screw A (Forward) Playback head Azimuth screw B (Reverse) Head section view Playback head Azimuth screw B Azimuth screw A (Reverse) (Forward) 1-40 (No.MA081)
  • Page 41 Item Conditions Adjustment and Confirmation methods S.Values Adjust Head Head height adjustment Test tape: azimuth Adjust the azimuth directly. When you SCC-1659 adjustment adjust the height using a mirror tape, VT703 (10kHz) remove the cassette housing from the mechanism chassis. After installing the cassette housing, perform the azimuth adjustment.
  • Page 42: Troubleshooting

    SECTION 5 TROUBLESHOOTING Feed section Is the voltage output at Is the wiring for IC501 Are the voltage inputs at IC501 pins "4","13", IC501 pin "63"? pin "63"? "29","40" ,"59","70","75","78" and "91"? Check the vicinity of Check Q581 - Q585 or IC501 or IC501.
  • Page 43 Tracking section Are the voltage outputs Is the voltage input at Is the voltage output at at IC581 pins "11" and IC581 pin "3"? IC501 pin "61"? "12"? Check the pickup and Check the wiring between Check the vicinity of its connections IC581 or IC581.
  • Page 44 Maintenance of laser pickup Replacement of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens Turn of the power switch and, disconnect the with a alcohol soaked cotton swab. power cord.
  • Page 45 16 PIN CORD DIAGRAM Black Green OR/WH Violet Blue Gray BL/WH Yellow White Orange WH/BK GN/BK GY/BK VI/BK MEMORY OR/WH BL/WH REMOTE WH/BK GN/BK VI/BK GY/BK OR/WH WH/BK GY/BK REMOTE Rear Right Remote out GN/BK VI/BK Front Right ACC Line MEMORY Memory Backup Battery + Front Left...
  • Page 46 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY CAR ELECTRONICS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MA081) Printed in Japan...
  • Page 47 SCHEMATIC DIAGRAMS CD/CASSETTE RECEIVER KW-XC888 CD-ROM No.SML200407 Area suffix UN --------------------------Asean Contents Block diagram Standard schematic diagrams Printed circuit boards 2-5 to 7 No.MA081SCH COPYRIGHT 2004 Victor Company of Japan, Limited. 2004/7...
  • Page 48: Safety Precaution

    Safety precaution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.
  • Page 49: Block Diagram

    Block diagram Main section Head amplifier section CASSETTE MECHA FM/AM TUNER TAPEIN MODE SUBMO+ FOCUS+ REEL SUBMO- FOCUS- FM/AM,PLLCE STANDBY TRACKING+ PLLDO,PLLCK CN402 IC402 A,B,E,F,MD,LD TRACKING- PLLDI,MRC FOCUS+ SPINDLE+ MOTOR SD/ST,SMETER FWD-L FOCUS- SPINDLE- CDON DRIVER CFSEL FWD-R TRACKING+ LOAD/FEED+ LOAD REW-L TRACKING-...
  • Page 50: Standard Schematic Diagrams

    Standard schematic diagrams Main section QAU0204-002 IC181 JCV8012 QNB0100-002 IC151 BD3807K C253 2.2/50 CH-R C154 2.2/50 C181 0.33 TAPE-L EVOLDA C254 2.2/50 C182 0.33 TAPE-R R153 EVOLCK SD/ST C156 C155 R152 R151 2SB815/7/-X PLLDI 4.7k 220P 2SB815/7/-X C256 R252 R251 C255 SMETER 4.7k...
  • Page 51 FL display and CD servo control section R533 3.3k 0.047 C537 C536 0.047 C535 470P LOAD/FEED- X501 C534 470P LOAD/FEED+ IC581 R524 C554 0.01 BA5830FP SPINDLE- FOCUS- SPINDLE+ FOCUS+ Q501 LOAD/FEED- TRACKING+ 2SB1132 R531 LOAD/FEED+ TRACKING- L503 REST R530 C558 LO/FE SPINDLE- C546...
  • Page 52 Head amplifier section IC402 LB1641 CN403 C425 QGF1201C3-10 0.01 Q403 2SB1322/RS/-T C424 R424 R425 2.2k R426 R448 Q402 R401 UN2211-X R445 Q432 2SD601A/QR/-X R446 R417 R447 R491 IC432 R443 BD4833FVE-W X431 C411 2.2K 0.015 R450 R449 C461 0.01 R466 CN402 100k QGA2001C1-06 C409...
  • Page 53 Printed circuit boards Main board Forward side Reverse side R923 R914 C913 D907 D905 R922 R913 C511 R912 C510 C912 C509 C922 D611 C508 C189 D609 C190 R505 C188 D607 R504 C187 R502 D605 R501 D603 C530 C503 C289 C582 C531 C501 C290...
  • Page 54 Front board Forward side Reverse side S864 D820 S865 S866 R861 S863 R862 R863 R818 R817 R819 R820 D819 R821 R814 D811 D812 R813 R808 R822 R812 R811 R864 C807 R860 D812 D811 R824 R807 R823 R859 R858 R826 R825 R828 R827 R857...
  • Page 55 Mechanism control board Forward side R432 R439 R431 R437 R435 R438 R436 R471 R434 R470 R433 R468 R466 R462 R469 R463 R467 R464 C461 R465 IC401 C414 R440 R451 R458 R452 R441 IC431 R454 R461 C438 R456 R455 C432 R442 R449 R443 Q432...
  • Page 56 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY CAR ELECTRONICS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan (No.MA081SCH)
  • Page 57: Parts List

    PARTS LIST [ KW-XC888 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix UN ---------------------------Asean - Contents - Exploded view of general assembly and parts list (Block No.M1) CD mechanism assembly and parts list (Block No.MB) Cassette mechanism assembly and parts list (Block No.MP)
  • Page 58 Exploded view of general assembly and parts list Block No. Main board LCD Switch board...
  • Page 59 oard Mecha control board...
  • Page 60 General Assembly Block No. [M][1][M][M]  Symbol No. Part No. Part Name Description Local LV21628-001A CS MECHA BKT QYSDST2606ZA TAP SCREW M2.6 x 6mm(x3) QYSDST2606ZA TAP SCREW M2.6 x 6mm(x4) QZW0143-001 WIRE CLAMP LV10863-001A TOP CHASSIS LV34654-001A EARTH PLATE LV10864-001A MIDDLE CHASSIS LV10865-001A BOTTOM CHASSIS...
  • Page 61 CD mechanism assembly and parts list Block No. Grease TN-2001-1048 TNG-87 GP-501MK CFD-005Z GP305T The parts without symbol number are not service.
  • Page 62 CD mechanism Block No. [M][B][M][M]  Symbol No. Part No. Part Name Description Local 30320115T DAMPER F 30320116T DAMPER R 303205505T CHASSIS RIVET A 303205503T CHANGE P. RVT A 303205301T CLAMPER ASSY 303205306T SPINDLE MOTOR A 30320502T CLAMPER ARM 30320503T CHANGE GEAR SPG 30320505T CHANGE GEAR 2...
  • Page 63 Cassette mechanism assembly and parts list Block No. CDS-802JE4 The parts without symbol number are not service.
  • Page 64 Cassette mechanism Block No. [M][P][M][M]  Symbol No. Part No. Part Name Description Local X-0802-1009S MAIN CHASSIS AS X-0802-1002S SLIDE CHASSIS A X-0802-1003S SIDE BKT ASSY X-0802-1004S CASSETTE HANGER X-0802-1005S PINCH ARM F ASS X-0802-1006S PINCH ARM R ASS X-0802-1007S GEARBASE LINK A X-0802-2001S MODE RACK ASSY...
  • Page 65  Symbol No. Part No. Part Name Description Local 2-1821-0040-D2S PSW-S 2.1 (x3) 2-1711-5040-16S E RING 2-1031-7030-C2S SCREW (x2)
  • Page 66 Grease point 1/2 FG-84M MEA-512R MEN-223 SW-902 CFD-409 CFD-250H EP-56 SW-474B 3-10...
  • Page 67 Grease point 2/2 3-11...
  • Page 68: Electrical Parts List

    Electrical parts list Main board  Symbol No. Part No. Part Name Description Local Block No. [0][1]  Symbol No. Part No. Part Name Description Local NCB31HK-103X C CAPACITOR 0.01uF 50V K QEKJ1CM-476Z E CAPACITOR 47uF 16V M QEKJ1CM-476Z E CAPACITOR 47uF 16V M IC121 NJM4565M-WE...
  • Page 69  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C505 NCB31HK-153X C CAPACITOR 0.015uF 50V K C625 NCB31HK-103X C CAPACITOR 0.01uF 50V K C506 NCB31CK-104X C CAPACITOR 0.1uF 16V K C626 NDC31HJ-471X C CAPACITOR 470pF 50V J...
  • Page 70  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R519 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J R653 NRSA63J-102X MG RESISTOR 1kΩ 1/16W J R520 NRSA63J-101X MG RESISTOR 100Ω 1/16W J R654 NRSA63J-222X MG RESISTOR 2.2kΩ...
  • Page 71  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local X601 QAX0617-001Z CRYSTAL 12.500MHz R834 NRSA63J-271X MG RESISTOR 270Ω 1/16W J X602 QAX0401-001 CRYSTAL 32.768KHz R835 NRSA63J-271X MG RESISTOR 270Ω 1/16W J R836 NRSA63J-271X MG RESISTOR...
  • Page 72  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C409 QEKJ1CM-226Z E CAPACITOR 22uF 16V M R468 NRSA63J-331X MG RESISTOR 330Ω 1/16W J C410 NCB31HK-153X C CAPACITOR 0.015uF 50V K R469 NRSA63J-223X MG RESISTOR 22kΩ...
  • Page 73 <MEMO> 3-17...
  • Page 74 Packing materials and accessories parts list Block No. 3-18...
  • Page 75 Packing and Accessories Block No. [M][3][M][M]  Symbol No. Part No. Part Name Description Local LVT1139-002A INST BOOK QYSDSP5008Z SCREW M5 x 8mm(x8) LV33876-003A CARTON LV10944-001A CUSHION LV10945-001A CUSHION FSPG4002-001 POLY BAG QPA00801205 POLY BAG 8cm x 12cm FSPG4002-001 POLY BAG QPC03004315P POLY BAG 30cm x 43cm...

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