Sharp LC-15PX1U Service Manual
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Sharp LC-15PX1U Service Manual

Sharp LC-15PX1U Service Manual

Lcd color television
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In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.
» IMPORTANT SERVICE SAFETY PRECAUTION .........................................................................................2
» SPECIFICATIONS ........................................................................................................................................5
» OPERATION MANUAL .................................................................................................................................6
» DIMENSIONS ...............................................................................................................................................8
» REMOVING OF MAJOR PARTS ..................................................................................................................9
» ADJUSTING PROCEDURE OF EACH SECTION ..................................................................................... 14
» TROUBLE SHOOTING TABLE ..................................................................................................................20
» CHASSIS LAYOUT .....................................................................................................................................26
» BLOCK DIAGRAM ......................................................................................................................................28
» OVERALL WIRING DIAGRAM ...................................................................................................................30
» DESCRIPTION OF SCHEMATIC DIAGRAM ............................................................................................. 32
» SCHEMATIC DIAGRAM ............................................................................................................................. 33
» PRINTED WIRING BOARD ASSEMBLIES ................................................................................................74
» REPLACEMENT PARTS LIST.................................................................................................................... 85
» PACKING OF THE SET ............................................................................................................................103
SHARP CORPORATION
SERVICE MANUAL
LCD COLOR TELEVISION
LC-15PX1U
MODEL
CONTENTS
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
LC-15PX1U
S15D4LC15PX1U
Page

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Summary of Contents for Sharp LC-15PX1U

  • Page 1: Table Of Contents

    LC-15PX1U SERVICE MANUAL S15D4LC15PX1U LCD COLOR TELEVISION LC-15PX1U MODEL In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

  • Page 2: Important Service Safety Precaution

    LC-15PX1U IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thor- oughly familiar with all safety checks and the servicing guidelines which follow: • Use an AC voltmeter having with 5000 ohm per volt, or...
  • Page 3 LC-15PX1U PRECAUTIONS A PRENDRE LORS DE LA REPARATION Ë Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants. exposées du coffret et une terre connue comme une AVERTISSEMENT conduite électrique ou une prise de terre branchée à...
  • Page 4 LC-15PX1U Precautions for using lead-free solder 1 Employing lead-free solder "All PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.

  • Page 5: Specifications

    Operation manual ËAs a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improve- ment without prior notice. The performance specification figures indicated are nominal values of production units. There may be some...

  • Page 6: Operation Manual

    LC-15PX1U OPERATION MANUAL...
  • Page 7 LC-15PX1U...

  • Page 8: Dimensions

    LC-15PX1U DIMENSIONS Unit: inch (mm) (178) (310) (63) (58) (526) (307) (151) (207) (100)

  • Page 9: Removing Of Major Parts

    LC-15PX1U REMOVING OF MAJOR PARTS 1. Remove the four lock screws from the stand, and detach the stand. 2. Remove the terminal covers (large and small). 3. Remove the two terminal screws. 4. Remove the eight lock screws from the cabinet B.
  • Page 10 LC-15PX1U 8. Remove the two lock screws from the operation panel (top cover), and detach the operation panel (top cover). 9. Remove the two lock screws from the operation PWB, and detach the operation PWB. 10. Remove the two lock screws from the R/C, LED PWB, and detach the R/C, LED PWB.
  • Page 11 LC-15PX1U 12. Remove the two lock screws from the inverter PWB, and detach the inverter PWB. 13. Remove the two lock screw from the card frame cover over, and detach the card frame cover. 14. Remove the five lock screws from the main PWB, and undo the claw a. Detach the main PWB by lifting the area around the claws and pulling the PWB out.
  • Page 12 LC-15PX1U » Precautions in handling the LCD panels 1. Work in a clean room (with humidities below 50%). 2. Be sure to wear an anti-static armband. 3. Handle the panels on an electro-conductive mat. 4. Be careful not to fall, shake and shock the panels.
  • Page 13 LC-15PX1U » Precautions in servicing the B side (backside) of the main PWB unit 1. Disconnect the FFC from between the main PWB (SC1201) and the LCD panel (CN3), and then connect the service-specific extension FFC (flat cable) (QCNW-A555WJZZ). 2. Disconnect the FFC from between the main PWB (SC1204) and the LCD panel (CN2), and then connect the service-specific extension FFC (flat cable) (QCNW-A556WJZZ).

  • Page 14: Adjusting Procedure Of Each Section

    LC-15PX1U ADJUSTING PROCEDURE OF EACH SECTION The best adjustment is made before shipping. If any position deviation is found or after part replace is performed, adjust as follows. Preparation for Adjustments Use the exclusive-use AC adapter or stable DC power supply.
  • Page 15 LC-15PX1U 5. Adjustment 5-1. Counter bias adjustment: COM BIAS on page 2 Adjust the "COM BIAS" setting until the contrast gets optimum (the black portion blackest). The adjustment guideline is around 120. 5-2. TAMP adjustment 1) Feed the color bar pattern signal.
  • Page 16 LC-15PX1U 5-5. Other adjustments (SOUND, VPC, S2310, DAC, TUNER, OTHERS, TEXT) 1) Move the cursor to a desired item on page 4 of adjustment process menu. Press the "CURSOR LEFT/ RIGHT" keys, "VOL (+)/(–)" keys or OK key to select the item.
  • Page 17 LC-15PX1U 6. Lamp error detection 6-1. Functional description This LCD color television has a function (lamp error detection) to be turned off automatically for safety when the lamp or lamp circuit is abnormal. If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed, the followings occur.
  • Page 18 LC-15PX1U 7. Functions of the PC card • PCMCIA card Used at 5V/3.3V • DM270 (IC5001, 5101) CPU, DSP, DMAC, OSD, NTSC encoder: system control, OSD display, video encoding/ decoding Used at 3.3V (1.5V for DSP) • DA150 (IC5201, 5202) Audio encoding/decoding •...
  • Page 19 LC-15PX1U Main Side IC (connector) Pin No. Terminal name Signal name Types of signals Explanation for signals name P701 3.3V (SUB) B3.3V2A Power supply Power supply 3.3V for DM270 (NA215WJ) VPC_VS V signal from VPC to DM270 (Video decoder) MSY/HS...

  • Page 20: Trouble Shooting Table

    LC-15PX1U TROUBLE SHOOTING TABLE...
  • Page 21 LC-15PX1U TROUBLE SHOOTING TABLE (Continued)
  • Page 22 LC-15PX1U TROUBLE SHOOTING TABLE (Continued) 1. Getting the card circuit test pattern displayed (*2) 1-1. Hold down the "MENU" and "TV/VIDEO" keys of the set, and turn on the "MAIN POWER" switch. 1-2. Make sure that "K" shows up in yellow at the left top of the screen.
  • Page 23 LC-15PX1U TROUBLE SHOOTING TABLE (Continued)
  • Page 24 LC-15PX1U TROUBLE SHOOTING TABLE (Continued)
  • Page 25 LC-15PX1U TROUBLE SHOOTING TABLE (Continued)

  • Page 26: Chassis Layout

    LC-15PX1U CHASSIS LAYOUT MAIN Unit CARD LED Unit CARD DETECT Unit R/C, LED Unit...
  • Page 27 LC-15PX1U OPERATION Unit ANALOG Unit INVERTER Unit...

  • Page 28: Block Diagram

    LC-15PX1U BLOCK DIAGRAM J3701 F3701 (DC 12V IN ) Q3107,Q3110 IC702,Q713 Q3117 B5V(D_SW) 1A IC3102 (5V_REG) (Pow cont.) (9V_REG.) IC3203 5V_SUB 2.5V (2.5V_REG) 3.3V(SUB) Sound Vcc IC3701 Q3709 IC701,Q716 Q3710 T701 (REG) (REG) 5V(MAIN) -12V Q3711 IC8801 B5V_MAIN1A IC3401 VPC3230D...
  • Page 29 LC-15PX1U INVERTER UNIT LAMP DRIVE IC704, Q714 IC708,Q725 IC703,Q712 L_ERR LAMP ERROR CHECK IC707, Q721 (3.3V_REG) (3.3V_REG) (4V/6V_REG & Cont) LCD PANEL CARD Circuit IC5703 Q8602,Q8601 IC5701, Q5701 20/15 (1.5V_REG) (Card Pow_Cont) IC5702, Q5702 IC5704 B3.3V_2A (3.3V/5V_REG & Cont) 3.3V 1.5V...

  • Page 30: Overall Wiring Diagram

    LC-15PX1U OVERALL WIRING DIAGRAM...
  • Page 31 LC-15PX1U...

  • Page 32: Description Of Schematic Diagram

    LC-15PX1U DESCRIPTION OF SCHEMATIC DIAGRAM VOLTAGE MEASUREMENT CONDITION: 1. The voltages at test points are measured on exclusive AC adaptor and the stable supply voltage of AC 120V. Signals are fed by a color bar signal generator for servicing purpose and the above voltages are measured with a 20k ohm/V tester.

  • Page 33: Schematic Diagram

    LC-15PX1U SCHEMATIC DIAGRAM Ë OPERATION Unit...
  • Page 34 LC-15PX1U Ë MAIN Unit-1/14...
  • Page 35 LC-15PX1U...
  • Page 36 LC-15PX1U Ë MAIN Unit-2/14...
  • Page 37 LC-15PX1U...
  • Page 38 LC-15PX1U Ë MAIN Unit-3/14...
  • Page 39 LC-15PX1U...
  • Page 40 LC-15PX1U Ë MAIN Unit-4/14...
  • Page 41 LC-15PX1U...
  • Page 42 LC-15PX1U Ë MAIN Unit-5/14...
  • Page 43 LC-15PX1U...
  • Page 44 LC-15PX1U Ë MAIN Unit-6/14...
  • Page 45 LC-15PX1U...
  • Page 46 LC-15PX1U Ë MAIN Unit-7/14...
  • Page 47 LC-15PX1U...
  • Page 48 LC-15PX1U Ë MAIN Unit-8/14...
  • Page 49 LC-15PX1U...
  • Page 50 LC-15PX1U Ë MAIN Unit-9/14...
  • Page 51 LC-15PX1U...
  • Page 52 LC-15PX1U Ë MAIN Unit-10/14...
  • Page 53 LC-15PX1U...
  • Page 54 LC-15PX1U Ë MAIN Unit-11/14...
  • Page 55 LC-15PX1U...
  • Page 56 LC-15PX1U Ë MAIN Unit-12/14...
  • Page 57 LC-15PX1U...
  • Page 58 LC-15PX1U Ë MAIN Unit-13/14...
  • Page 59 LC-15PX1U...
  • Page 60 LC-15PX1U Ë MAIN Unit-14/14...
  • Page 61 LC-15PX1U...
  • Page 62 LC-15PX1U Ë ANALOG Unit-1/4...
  • Page 63 LC-15PX1U...
  • Page 64 LC-15PX1U Ë ANALOG Unit-2/4...
  • Page 65 LC-15PX1U...
  • Page 66 LC-15PX1U Ë ANALOG Unit-3/4...
  • Page 67 LC-15PX1U...
  • Page 68 LC-15PX1U Ë ANALOG Unit-4/4...
  • Page 69 LC-15PX1U...
  • Page 70 LC-15PX1U Ë R/C, LED Unit...
  • Page 71 LC-15PX1U Ë CARD LED Unit...
  • Page 72 LC-15PX1U Ë CARD DETECT Unit...

  • Page 73: Inverter Unit

    LC-15PX1U Ë INVERTER Unit...

  • Page 74: Printed Wiring Board Assemblies

    LC-15PX1U PRINTED WIRING BOARD ASSEMBLIES MAIN Unit (Side-A) TP5603 R5062 P5201 P5100 P2005 SC1204 TP2069 R5051 R5063 R5138 R2091 IC5002 C5004 R5064 C5710 R5066 R5067 R5759 R5619 R5728 R5065 R5745 R5757 C5121 D5701 R5222 D5604 TL5207 R8608 R8610 R5758 C5218...
  • Page 75 LC-15PX1U TP702 C1122 D1106 D1107 P2003 C1117 C1106 SC1202 TP2069 TP707 FB709 C773 C1123 L706 FB8704 C8524 L1701 R1130 IC1101 Q725 R8517 C780 R8516 C8520 C8521 R8518 C1712 C1704 SC1201 R1135 R1138 R1137 Q713 D702 R1101 C1105 L1702 R1708 R1707...
  • Page 76 LC-15PX1U MAIN Unit (Side-B) TL2014 TL2016 TL2013 TL2015 TL2017 TP705 TL1224 TL1228 TL1231 TL1226 TL1230 TL1232 TL1227 TL1241 TL1245 R2002 FB8507 FB8508 R1124 TL1225 TL1229 TL1243 TL1221 C774 R1756 C772 C8541 TL1223 R1755 TL1237 IC708 TL1222 R1754 TL1242 TL1247 D1702...
  • Page 77 LC-15PX1U TL1296 TL1266 TL1270 TL1260 TL1279 TL1295 TL1269 TL1272 TL1276 TL1261 TL5110 TL5112 1231 C5622 TL2089 R2092 TL1232 TL1274 TL1277 TL2080 TL2090 TL2092 TL1259 TL1280 P5701 TL1245 S5701 TL1243 TL1221 TL2093 TP5606 TL2079 TL1267 TL1275 TL1264 TL1281 TL1271 TL5111 TL1283...
  • Page 78 LC-15PX1U ANALOG Unit (Side-A)
  • Page 79 LC-15PX1U...
  • Page 80 LC-15PX1U ANALOG Unit (Chip Parts Side-A) TP3432 SC3403 R3401 R3248 SLD7002 R3406 R3544 D3404 R3423 C3413 R3547 R7018 R7014 R3443 C7010 C7053 C7047 C7037 C7027 L7001 R3546 C7028 C7036 R3438 C7051 C7045 FB7003 C7011 C7032 C7033 L7005 Q7004 R3439 CF3401...
  • Page 81 LC-15PX1U D3405 D3403 R3433 R3441 C3430 R3429 C3420 C3127 R3426 Q3110 Q3107 R3118 SC3403 P3704 C3421 D3104 R3127 R3108 R3730 D3706 R3410 R3546 R3714 L3401 R3446 C3402 C3707 R3722 C3107 R3405 J3401 IC3406 R3447 R3726 R3723 R3431 R3408 R3720 R3501...
  • Page 82 LC-15PX1U INVERTER Unit (Side-A)
  • Page 83 LC-15PX1U FH6503 FH6504 R6517 R6506 C6508 R6518 Q6505 R6507 C6507 R6513 R6504 D6500 Q6502 R6500 R6501 P6502 INVERTER Unit (Chip Parts Side-A)
  • Page 84 LC-15PX1U OPERATION Unit (Side-A) (QPWBXC466WJN1) S4053 OPERATION Unit (Chip Parts Side-A) (QPWBXC466WJN1) R/C, LED Unit (Side-A) (QPWBXC467WJN1) D4005 C4202 Q4004 R4011 C4004 P4001 R4014 Q4001 R4012 C4003 R4006 R4013 R4004 IC4201 D4001 D4002 J4021 R4003 Q4003 C4201 R/C, LED Unit (Chip Parts Side-A)

  • Page 85: Replacement Parts List

    2. NO. DE REF 3. NO. DE PIECE 4. DESCRIPTION in USA: Contact your nearest SHARP Parts Distributor to order. For in CANADA: Contact SHARP Electronics of Canada Limited location of SHARP Parts Distributor, Please call Toll-Free; Phone (416) 890-2100...

  • Page 86: Main Unit

    LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC351FE02 DUNTKC464FE02 INVERTER Unit (Continued) MAIN Unit INTEGRATED CIRCUITS FH6501 QFSHD1002CEZZ J Fuse Holder FH6502 QFSHD1002CEZZ J Fuse Holder IC701 RH-iXA828WJZZY J BD9300FV-FE2 FH6503 QFSHD1002CEZZ J Fuse Holder...
  • Page 87 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC464FE02 D5702 VHDDAN222//-1Y J Diode D5703 VHDDAN222//-1Y J Diode MAIN Unit (Continued) D8501 VHDDAN202K/-1Y J Diode PACKAGED CIRCUITS Q716 VSRHP020N06-1Y J RHP020N06 Q718 VSDTC144EKA-1Y J DTC144EKA X2001 RCRSC0032TAZZY J Crystal...
  • Page 88 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC464FE02 C2014 VCKYCY1EF104ZY J 0.1 25V Ceramic C2015 VCCCCY1HH180JY J 18p 50V Ceramic MAIN Unit (Continued) C2016 VCKYCY1EF104ZY J 0.1 25V Ceramic C2017 VCKYCY1EF104ZY J 0.1 25V Ceramic C2018 VCKYCY1EF104ZY J 0.1...
  • Page 89 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC464FE02 C8502 VCKYCY1EF104ZY J 0.1 Ceramic C8503 VCKYCY1EF104ZY J 0.1 Ceramic MAIN Unit (Continued) C8504 VCKYCY1EF104ZY J 0.1 Ceramic C8505 VCKYCY1EF104ZY J 0.1 Ceramic C8506 VCKYCY1EF104ZY J 0.1 Ceramic C5128 VCKYCY1EF104ZY J 0.1...
  • Page 90 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC464FE02 R745 VRS-CY1JF000JY 1/16W Metal Oxide R755 VRS-CY1JF333JY J 33k 1/16W Metal Oxide MAIN Unit (Continued) R756 VRS-CY1JF104DY J 100k 1/16W Metal Oxide R757 VRS-CY1JF104DY J 100k 1/16W Metal Oxide...
  • Page 91 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC464FE02 R2066 VRS-CY1JF101JY J 100 1/16W Metal Oxide R2067 VRS-CA1JF392JY J 3.9k 1/16W Metal Oxide MAIN Unit (Continued) R2068 VRS-CY1JF103JY J 10k 1/16W Metal Oxide R2069 VRS-CY1JF000JY...
  • Page 92 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC464FE02 R5220 VRS-CY1JF000JY 1/16W Metal Oxide R5221 VRS-CY1JF105JY J 1M 1/16W Metal Oxide MAIN Unit (Continued) R5222 VRS-CB1JF103JY J 10k 1/16W Metal Oxide R5223 VRS-CY1JF000JY 1/16W Metal Oxide...
  • Page 93 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC464FE02 R8825 VRS-CY1JF000JY 1/16W Metal Oxide R8826 VRS-CY1JF121FY J 120 1/16W Metal Oxide MAIN Unit (Continued) R8827 VRS-CB1JF000JY 1/16W Metal Oxide R8828 VRS-CA1JF101JY J 100 1/16W Metal Oxide...
  • Page 94 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC465DE02 D3704 VHDDAN222//-1Y J Diode D3705 VHDDAN222//-1Y J Diode ANALOG Unit D3706 VHDDAN222//-1Y J Diode D3707 VHDRB491D++-1Y J Diode TUNER PACKAGED CIRCUITS NOTE: THE PARTS HERES SHOWN ARE SUPPLIED AS AN X3201 RCRSB0250GEZZ J Crystal, 18.432MHz...
  • Page 95 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code C3430 VCKYCY1AB474KY J 0.47 Ceramic DUNTKC465DE02 C3431 VCKYCY1EF104ZY J 0.1 Ceramic ANALOG Unit (Continued) C3432 VCEASX1CN107MY J 100 Electrolytic C3433 RC-KZA041WJZZY J 10 Ceramic C3435 VCKYCY1EF104ZY J 0.1...
  • Page 96 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code R3387 VRS-CY1JF472JY J 4.7k 1/16W Metal Oxide DUNTKC465DE02 R3388 VRS-CY1JF472JY J 4.7k 1/16W Metal Oxide ANALOG Unit (Continued) R3389 VRS-CY1JF222JY J 2.2k 1/16W Metal Oxide R3390 VRS-CY1JF223JY...
  • Page 97 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC465DE02 P3704 QPLGN0547FJZZY J Plug, 10-pin SC3403 QSOCN0464FJZZY J Socket, 50-pin ANALOG Unit (Continued) TP3432 QLUGHA006WJZZY J Lug TP3433 QLUGHA006WJZZY J Lug TP7000 QLUGHA006WJZZY J Lug R3502 VRS-CY1JF561FY...

  • Page 98: Operation Unit

    LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC466DE02 DUNTKC467DE02 OPERATION Unit R/C, LED Unit INTEGRATED CIRCUITS DIODES IC4201 VHiTPS850++-1Y J TPS850 D4050 RH-EX1271CEZZY J Zener Diode, 12V D4051 RH-EX1283CEZZY J Zener Diode, 18V TRANSISTORS...
  • Page 99 LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC468DE02 DUNTKC469DE02 CARD LED Unit CARD DETECT Unit INTEGRATED CIRCUITS SWITCHES IC9202 VHiBA3308FV1EY J BA3308FV S6000 QSW-MA008WJZZ J CARD Detection S6001 QSW-MA008WJZZ J CARD Detection DIODES MISCELLANEOUS PARTS...

  • Page 100: Cabinet And Mechanical Parts

    LC-15PX1U CABINET AND MECHANICAL PARTS 1-28 1-27 1-29 1-16 1-28 1-21 1-27 Operation PWB 1-23 1-11 1-18 1-14 1-15 1-12 1-24 Card LED 1-10 1-12 1-15 1-13 1-10 1-14 1-22 5-14 1-20 R/C, LED 1-12 1-11 1-11 5-14 5-2-2 1-26...
  • Page 101 PSPAHA333WJZZ J Light Shielding Spacer, x1 AA Not Available – Cabinet A — 5-2-5 TCAUZA031WJZZ J Caution Label HBDGBA029WJSA J Badge, "SHARP" KLMP-A045WJZZ J Lamp Unit å HDECQA340WJSA J CARD LED Cover LX-BZA047WJF7 J Screw, x4 HDECQA346WJSA J R/C,LED Cover...

  • Page 102: Packing Parts

    LC-15PX1U Ref. No. Part No. Description Code Ref. No. Part No. Description Code PACKING PARTS SUPPLIED ACCESORIES (NOT REPLACEMENT ITEM) LHLDWA037WJSA J Cable Holder, x1 SPAKCB286WJZZ – Packing Case — å QACCDA023WJPA J AC Cord SPAKFA450WJZZ – Packing Material —...

  • Page 103: Packing Of The Set

    LC-15PX1U PACKING OF THE SET...
  • Page 104 LC-15PX1U COPYRIGHT © 2005 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

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