Sharp MD-S301, Service Manual

Page 1: ...IAGRAM WIRING SIDE OF P W BOARD 24 VOLTAGE 29 NOTES ON SCHEMATIC DIAGRAM 30 WAVEFORMS OF MD CIRCUIT 31 TROUBLE SHOOTING 32 FUNCTION TABLE OF IC 36 PARTS GUIDE EXPLODED VIEW PACKING OF THE SET MD S301 ONLY SERVICE MANUAL SHARP CORPORATION No S1801MDS301 This document has been published to be used for after sales service only The contents are subject to change without notice In the interests of user...

Page 2: ...vailable car adaptor AD CA20X for cars with a 12 24V DC negative ground electrical system Power source DC 3 6 V rechargeable lithium ion battery x 1 MD S301W DC 5 V AC adaptor AC 110 240 V 50 60 Hz DC 1 5 V Optionally available battery case AD S30BC commercially available AA size alkaline battery x 1 DC 4 5 V Optionally available car adaptor AD CA20X for cars with a 12 24V DC negative ground elect...

Page 3: ...r Display 4 Track Number Indicator 5 Battery Indicator 6 Repeat Indicator 7 Random Indicator 8 Headphones Socket 9 Hold Switch 10 Play Mode Button 11 Volume Buttons 12 Bass Button 13 Display Button 14 Play Pause Button 15 Stop Power Off Button 16 Fast Reverse Fast Foward Buttons 1 2 3 4 5 6 7 10 11 8 9 RANDOM TOTAL 1 10 11 12 9 13 14 15 16 8 1 2 6 7 4 5 3 BATTERY DISPOSAL MD S301 ONLY Contains nic...

Page 4: ...nt power sources a rechargeable battery an AC adaptor an optionally available battery case AD S30BC and an optionally available car adaptor AD CA20X O P E N OPEN Mark To the DC IN 5V jack AC 120V 60 Hz OPEN OFF POWER 5 Insert securely all the way in 4 Checking the remaining amount of battery charge The remaining amount of battery charge is shown by the battery indicator on the remote control displ...

Page 5: ... Is the remote control unit or the headphones plugged in Are you trying to play a MiniDisc with data on it instead of a MiniDisc containing music When the operation buttons are pressed the unit does not re spond Is the unit in the safety mode Is the battery exhausted Is the remote control unit plug or the headphone plug inserted firmly Has condensation formed inside the unit Is the unit being infl...

Page 6: ... Important Do not wear your headphones when you are cross ing streets or near traffic Do not use your headphones while driving a motor vehicle it may create a dangerous traffic hazard and may be illegal Remember to obey all of the safety rules in your area Do not play the unit at a high volume Hearing experts advise against extended play at high vol ume levels If you experience ringing in your ear...

Page 7: ...crew B1 x4 7 1 2 Flexible PWB B2 x1 3 Main PWB 1 Screw C1 x1 7 2 2 Flexible PWB C2 x2 3 Soldering C3 x3 4 Mechanism Unit 1 Lift the back side and 7 3 remove in the arrow direction REMOVAL PROCEDURE STEP FIGURE Note Carefully handle the main PWB and flexible PWB So as to prevent electrostatic damage of optical pickup after removing the flexible PWB 1 for optical pickup from the connector wrap the f...

Page 8: ...2 x 1 pc 2 Remove the screw B3 x 3 pc 3 Remove the flex PWB soldering joint B4 x 3 places and remove the sled motor Note Be careful so that the motor gear is not damaged If the gear is damaged abnormal sound is emitted when searching is performed How to remove the spindle motor See Fig 8 1 1 Remove the flexible PWB solder joint A1 x 4 4 places 2 Remove the screws A2 x 3 pcs and remove the Spindle ...

Page 9: ...er is turned on in the normal mode 4 Change to standby state Preliminary automatic adjustment or EEPROM rewriting 1 Short circuit TP435 and TP421 2 Perform preliminary automatic adjustment or EEPROM rewriting 3 Press the button to set the standby state 4 Release short circuiting of TP435 and TP421 ADJUSTMENT Preparation for adjustment use the low reflection disc on which music has been recorded MD...

Page 10: ...OUT level setting for groove section adjustment 1 1 RF side TCRS gain adjustment 1 2 Tracking ATT initial setting 1 3 RF side focus gain minor adjustment 1 4 Focus ATT initial setting 1 5 S gain High ABEF offset measurement 1 6 TCRS offset measurement 1 7 S gain Low ABEF offset measurement TEST MODE STOP Pre autoadjustment menu ATT autoadjustment menu Pre manual adjustment menu ATT manual adjustme...

Page 11: ...o the next page SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN Pre manual adjustment menu Temperature code display A signal offset AINO tentative measurement T...

Page 12: ...n adjustment COUT level setting P T G P C H G T G G C H e f DISP DISP DISP DISP DISP DISP DISP DISP DISP DISP DISP DISP Continued from the preceding page R F G S A S B A H B H E H F H T H A L B L E L F L P MODE P MODE P MODE P MODE P MODE When the STOP button is pressed in specific menu the TEST MODE STOP state is set In the specific setting display state the setting change digit changes when the ...

Page 13: ... ATT focus setting ATT setting ATT setting High reflection B ATT focus setting Low reflection B ATT focus setting ATT setting TCRS ATT setting ATT setting Addresse P MODE P MODE P MODE In the specific setting display state the setting change digit changes when the P MODE key is pressed In the specific setting display state the selection digit value changes in the range of 0h to Fh when VOL UP DOWN...

Page 14: ... setting S gain High B signal offset measurement value setting S gain High E signal offset measurement value setting S gain High F signal offset measurement value setting S gain Low A signal offset measurement value setting S gain Low B signal offset measurement value setting S gain Low E signal offset measurement value setting S gain Low F signal offset measurement value setting TCRS signal offse...

Page 15: ...Y S Q A P H B L B When the STOP button is pressed in specific menu the TEST MODE STOP state is set In the start address set state the start address changes as follows when the DISP key is pressed A d 0 0 5 0 A d 0 0 5 0 A d 0 0 5 0 A d 0 0 5 0 A d 0 3 C 0 DISP DISP DISP DISP A d 0 7 0 0 A d 0 8 A 0 In the start address set state the start address changes as follows when the BASS key is pressed BAS...

Page 16: ...WN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN 12h RF side FG TG and TCRSG adjustment termination disabled 13h Excessive servo retract retry in case of adjustment 17h A B E F and TCRSO offset measurement time is out of tolerance 21h Allowable time over until completion of focus retraction 23h Track search completion allowable time over 32h P TOC read disabled 42h U TOC read disabled 71h ...

Page 17: ...acteristics constant 2 setting FZC detection hysteresis level setting FOK generation comparison level setting normal DISC ID judgment high reflection lower limit level Focus related other settings FOK generation LPF factor setting when focus ON Focus servo amptitude Auto focus retraction waiting time setting Focus search inclination PLAY F o c u s FOCUS SETTING F G F F 1 F F 2 F Z H F L n D J G F ...

Page 18: ...DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN Setting Setting Setting Setting Setting Setting Setting Setting Setting Setting Setting Setting Setting Setting Setting Setting Setting Spin setting menu Spin system loop filter gain constant setting until servo is turned on Spin system loop filter again constant setti...

Page 19: ...d in the range of 00 H to FF H when the VOL UP DOWN key is pressed The upper limit varies depending on the items Setting Setting Setting Setting Setting Setting Setting Setting Temp setting menu TEMP setting TEMP A D input value T e m p TEMP SETTING T M T P i n PLAY SKIP UP SKIP DOWN Setting Temperature code Measurement value When the STOP button is pressed in specific menu the TEST MODE STOP stat...

Page 20: ...etting Setting Digital EQ setting menu High reflection pit section Digital EQ tap factor A D High reflection pit section Digital EQ tap factor B C High reflection pit section Autolevel slicer gain High reflection pit section Autolevel slicer slice level offset Lows reflection pit section Digital EQ tap factor A D Low reflection groove section digital EQ tap factor A D Lows reflection pit section D...

Page 21: ...ting When the STOP button is pressed in specific menu the TEST MODE STOP state is set In specific state pressing the DISP key causes change to focus setting menu In the specific setting display state the setting change digit changes when the P MODE key is pressed P MODE P MODE In the specific state the setting changes in the range of 0 H to F H when the VOL UP DOWN key is pressed Note In case of E...

Page 22: ...der 8 bit Item Initial Setting Item Initial Setting 1 9 H B S 1 A 2 H B S 2 C 4 H 1 A H B S 3 E 4 H B S M H Address High order 8 bit Low order 8 bit Item Initial Setting Item Initial Setting TEMP setting 1 B H T M H T M M H Address High order 8 bit Low order 8 bit Item Initial Setting Item Initial Setting Adjustment setting 1 C H C O K A 0 H F A T C 0 H 1 D H T A T 3 E H C A T 2 0 H 1 E H F A B 0 ...

Page 23: ... 6 D A CONVERTER IC501 UDA1320 10 7 5 3 1 4 4 5 IC403 TC7W14FU INVERTER E 2 PROM IC402 S29L294A B B 8 8 11 14 86 88 B 9 23 24 36 81 IC401 IX2677AF SYSTEM MICROCOMPUTER 91 16 19 82 84 86 XL201 33 868MHz SW401 HOLDSW SW901 DISC IN SW451 PLAY SKIP UP ENDEC AUDIO D ACONVERTER LASER MOTOR DRIVER 12 33 72 IC405 RESET D402 B B 4 2 1 15 POWER DRIVE IC831 IC832 IC821 IC851 IC871 TK71325M POWER SUPPLY MICRO...

Page 24: ...1 NDS355AN Q904 NDS335N Q905 NDS335N Q906 NDS335N 6 5 4 3 2 1 6 5 4 3 2 1 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 48 47 46 45 44 43 42 41 40 39 38 37 5 6 7 8 4 3 2 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 76 77 78 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 98 99 100...

Page 25: ... 1Y IC812 HAT1025R D812 SB10015C D813 SB10015C C835 390P C834 560P R837 15K R833 10K C831 0 01 R832 100K R831 33K C822 33 10 C823 1 C824 3 3 10 L823 4 7µH L821 L822 4 7µH L824 D822 F1J2F R824 390K C828 12P R823 360K C827 10 10 CH R822 27K C821 0 1 TP811 C151 68 10 L871 4 7 C833 0 01 C840 390P R843 15K C839 560P C838 0 01 C841 0 33 R844 270K R846 330K CH C201 1 L201 4 7µH L202 1µH C742 0 001 C741 0...

Page 26: ...56 L852 L824 L851 R805 D803 D822 D813 L821 L823 L822 L854 L721 C822 Q871 R825 C824 C827 Q801 IC833 C813 1 1 1 3 3 5 75 6 10 11 15 16 20 C841 XL201 R222 C212 C211 D856 C851 C706 C741 R702 C503 IC871 R870 L853 R502 R505 C508 IC501 C507 C504C501 L201 D402 C401 R501 R506 C622 C608 C600 L600 C408 C204 L608 L609 C611 L611 C502 C609 C222 1 8 9 16 IC201 IC202 C407 L202 C202 C113 R154 C161 Q101 C104 C103 C...

Page 27: ...846 IC862 C852 R831 R837 C839 R843 C838 D861 D853 C703 C704 C702 C707 R707 C701 R454 R451 R455 R452 R421 C864 C863 C405 R422 C742 R862 R864 R863 R861 R867 IC702 C705 C859 1 12 13 24 R701 R709 R710 R851 C751 L736 R722 L751 D702 D855 R860 CN401 R713 C712 C711 R854 IC851 D852 C865 C862 C861 R852 R714 C714 R712 R711 C713 L732 L731 L733 D831 R836 R827 IC811 C834 IC821 C846 D821 R857 D451 L710 Q852 L734...

Page 28: ...901 SPINDLE MOTOR MECHANISM FLEXIBLE PWB M902 SLED MOTOR SW901 DISC IN PICKUP UNIT 15 CN101 TO MAIN PWB CN601 P27 10 G TO MAIN PWB CN401 P27 10 A TO MAIN PWB REW PLAY FF SW455 SW454 SW452 SW451 SW453 OFF STOP KEY SWITCH FLEXBLE UNIT 221 9 P27 8 G VOLUME UP VOLUME DOWN FLEXIBLE PWB ...

Page 29: ...1 26V 1 77V 0V 2 51V 2 52V 0V 0V 1 25V 2 51V 0 43V 0V 0 31V 9 8 7 6 5 4 3 2 1 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 40 39 38 37 36 35 34 33 32 31 50 49 48 47 46 45 44 43 42 41 PIN NO VOLTAGE IC401 PIN NO VOLTAGE 51 64 63 62 61 60 59 58 57 56 55 54 53 52 68 67 66 65 69 80 79 78 77 76 75 74 73 72 71 70 90 89 88 87 86 85 84 83 82 81 100 99 98 97 96 95 94 93 92 91 9 8 7 6 5 4 ...

Page 30: ... Multimeter between such a section and the chas sis with no signal given Parts marked with are important for maintaining the safety of the set Be sure to replace these parts with specified ones for maintaining the safety and performance of the set The wiring diagram and the PWB drawing may be changed to refect improvements in the design without prior notice They may differ a little the unit you ha...

Page 31: ...ter Offset Record Length Smoothiing OFF BW FULL CH1 0 000V CH2 Main 10K Zoom 10K CH3 0 00V CH4 0 00V Trigger Mode NORMAL Type EDGE CH2 Detay 0 0ns Hold OFF MINIMUM T T 1 4 3 2 NORMAL ENVEL OPE AVERAGE Ac quisition ON Rep OFF 2 3 5 6 CH2 CH3 CH4 EXT LINE Stopped NORM 100MS s 500ms div 500ms div CH1 2V DC 10 1 CH3 2V DC 10 1 Filter Offset Record Length Smoothiing OFF BW FULL CH1 0 00V CH2 Main 500 Z...

Page 32: ...rn the power off Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol Do not touch the lens with the bare hand Is power turned on when the remote control button or main unit button is pressed No Check asstated in Power is not turned on when the button is pressed Check as stated in Indication is not normal No Yes Does display operate normally Is playback state s...

Page 33: ...rved Is the pin 40 in H state Yes Solder failure around IC404 Replace remote control unit Is it impossible to play back only the high reflection disc Is the pin 61 of IC401 in H state in the high reflection disc insertion test mode Yes Check as stated in Check in TEST mode Yes No Yes No Check mechanism flexible circuit board CN601 Yes Is it impossible to play back only the low reflection disc Is t...

Page 34: ... of IC201 low reflection Is the MANUAL1 mode A signal toF signal measurement within allowable range Check Vref value of pins 5 and 6 of IC101 No Yes Yes Is laser power normal when laser lights in MANUAL 2 mode No Check TP108 TP109 CN101 8 and 9 IC401 60 and 34 Q101 periphery and pickup flex Yes Is there focus access in A ATT B ATT set step No Check the pins 18 and 19 of IC201 pins 11 13 17 and 18 ...

Page 35: ...ent step Check periphery of IC201 No Is waveform observed on the pin 24 of IC601 Yes Replace IC601 No Is waveform observed on the pins 13 and 17 of IC901 Yes Check solder joint of L609 IC201 IC901 CN601 flexible PWB No Yes Replace the spindle motor No Check the lead in switch SW901 solder joint of mechanism flexible PWB pin 15 of CN601 Normal playback Is initialization performed normally in the hi...

Page 36: ...ignal input terminal 23 DATA Serial data input terminal 24 DVCC Digital section power terminal 25 FOUT Servo signal amp tracking servo system output terminal 26 EOUT Servo signal amp tracking servo system output terminal 27 BOUT Servo signal amp focus servo system output terminal 28 AOUT Servo signal amp focus servo system output terminal 29 TCGO Groove state track cross detection signal amp outpu...

Page 37: ...88 89 90 91 92 93 94 95 96 97 98 99 100 1 2 3 4 5 6 7 8 9 10111213141516171819202122232425 75747372717069686766656463626160595857565554535251 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 TOTMON TEMON SBCK SBO SBSY SFSY FOK SENSE COUT MCCK DINTX VDD1 DGND RSTX SYD0 SYD1 SYD2 SYD3 SYD4 SYD5 SYD6 SYD7 SYWRX SYRDX SYRS EFMO PLCK ACRCER TCRS RAD0 RAD1 RAWEX RARASX RAA9 RAD...

Page 38: ...D Digital GND 39 RACASX Output Column address strobe signal output to external D RAM 40 RAD2 Input Output Data input output from and to external D RAM D2 41 RAD3 Input Output Data input output from and to external D RAM D3 MSB 42 RAA9 Output Address output to external D RAM ADR9 43 RARASX Output Low address strobe signal output to external D RAM 44 RAWEX Output Data write enable signal output to e...

Page 39: ...nc signal EIAJ CP 309 format 82 FOK Output Focus OK detection signal 0 Focus OK 83 SENSE Output Servo status detection signal 1 Auto move auto jump auto focus retraction 84 COUT Output Track cross signal output 85 MCCK Output Microcomputer clock output Clock is output even when RSTX 0 86 DINTX Input System controller interface interruption request output terminal 87 VDD1 Digital power 88 DGND Digi...

Page 40: ... key operation detection input 30 P15 RTRG Input Start up request from composite machine 31 ANI6 TEMP Input Ambient temperature detection input 32 ANI7 CNTRY Input Product destination identification input 33 AVSS AVSS A D converter ground potential 34 AN00 LDVAR Output P U laser power setting output 35 AN01 MDOUT Output Internal operation mode output 36 AVREF1 AVREF1 D A converter references volta...

Page 41: ... Output Sled motor control spare 90 P34 ELON Output Remote control EL light control output 91 T100 CIN Input Track cross signal detection input 92 P36 PHOLD Output Dry cell power ON holding output 93 P37 PCNT1 Output Power IC VREF supply control output 94 TEST VPP VPP TEST F ROM write power input 95 P90 PCNT2 Output Power IC VCC supply control output 96 P91 CKSTP Output Main clock stop control out...

Page 42: ...PWM LOGIC Vcc 1 2 DB EAIN EAIN EAOUT GND 11 10 9 8 7 1 2 3 4 5 6 13 LATCH 12 R OUTPUT 14 CLOCK 11 R HP INPUT LINE R INPUT MIC SELECT R INPUT MIC R OUTPUT R HEADPHONE OUTPUT MIC SELECT L INPUT MIC L OUTPUT L HEADPHONE OUTPUT L OUTPUT LINE L OUTPUT L HP INPUT 15 SERIAL DATA 10 16 9 17 VEE VCC 8 HP AMP BIAS 18 7 A GND D GND 19 6 20 5 21 BIAS INPUT MIC R INPUT MIC L INPUT MIC GND 4 22 3 23 2 24 1 LOGI...

Page 43: ... 19 10 16 22 23 24 25 21 27 28 29 20 26 32 36 33 34 35 31 30 CLK PS OE FI1 RI1 GND FI2 RI2 FI3 RI3 FI4 RI4 PGND FO4 RO4 VD4 VD4 PGND RO3 FO3 PGND VD3 VD3 FO1 RO1 VD2 VD2 PGND FO1 RO1 AGND VD1 VD1 2 3 4 5 1 7 8 9 6 12 13 14 15 15 11 19 10 20 17 FG VCC UIN VIN WIN COM CST CSL1 CSL2 GND BRK BRK STBY RIB RF VOUT UOUT VM WOUT STAND BY TSD EX OR START CONTROL LOGIC PHASE CONTROL SLOP WAVEFORM SYNTHESIS ...

Page 44: ...MD S301 S301W 44 M E M O ...

Page 45: ...r type VC MF Cylindrical type without lead wire VC MN Cylindrical type without lead wire VC TV Square type without lead wire VC TQ Square type without lead wire VC CY Square type without lead wire VC CZ Square type without lead wire VC J The 13th character represents capacity difference J 5 K 10 M 20 N 30 C 0 25 pF D 0 5 pF Z 80 20 If there are no indications for the electrolytic capacitors error ...

Page 46: ...2 RCILC0333AFZZ J AC 10 µH Choke L201 VPBNN4R7M0000 J AC 4 7 µH L202 VPBNN1R0M0000 J AC 1 µH L501 RCILC0333AFZZ J AC 10 µH Choke L600 RCILC0331AFZZ J AC 2 2 µH Choke L601 604 RCILR0559AFZZ J AC 47 µH L608 RCILR0559AFZZ J AC 47 µH L609 RCILC0333AFZZ J AC 10 µH Choke L611 VPBNN1R0M0000 J AC 1 µH L701 702 RCILC0344AFZZ J AC 47 µH Choke L710 RCILC0290AFZZ J AC Tip Solid Induction 200mA L711 RCILC0246A...

Page 47: ... VRS CY1JB102J J AA 1 kohm 1 16W R451 VRS CY1JB123J J AA 12 kohms 1 16W R452 VRS CY1JB103J J AA 10 kohm 1 16W R454 VRS CY1JB223J J AA 22 kohms 1 16W R455 VRS CY1JB104J J AA 100 kohm 1 16W R501 502 VRS CY1JB562J J AA 5 6 kohms 1 16W R505 506 VRS CY1JB822J J AA 8 2 kohms 1 16W R601 VRS CY1JB563J J AA 56 kohms 1 16W R701 VRS CY1JB154J J AA 150 kohms 1 16W R702 VRS CY1JB334J J AA 330 kohms 1 16W R707 ...

Page 48: ...AFZZ J AB Cushion Mechanism 211 PSHET0373AFZZ J AC Sheet 213 LANGZ0342AFM1 J AN Bracket Eject 214 PCUSG0633AFZZ J AA Rubber Preventive Vibration 215 PCUSG0634AFZZ J AA Rubber Preventive Vibration 216 GCABA2841AFSA J AE Center Cabinet 217 PCUSG0534AFZZ J AC Rubber Preventive Vibration 219 PSHET0376AFZZ J AA Sheet Ext Battery Terminal 220 QTANZ9152AFFQ J AG Ext Battery Terminal 221 CCABC4328AF07 J B...

Page 49: ...MD S301 S301W 49 A B C D E F G H 1 2 3 4 5 6 4 Figure 4 MD MECHANISM EXPLODED VIEW 10x3 1 18 17 16 15 2 8 8 1 M901 8 2 10 14 13 12x2 M902 11 10 7x2 22 6 3 4 5 9 19 SW901 20 21 ...

Page 50: ...1 221 4 221 9 221 5 226 221 7 221 8 602 216 221 8 219 215 203 606 222 220 230 207 605 201 5 201 2 201 1 201 3 201 4 221 228 209 210 214x2 602 603 213 602 231 205 208 211 202 202 2 202 3 202 1 601x2 601x2 601x2 202 4 227 202 5 201 PWB A 604x2 224 229 604x2 225 602 602 221 8 217 224 223 217 301W ONLY 301W ONLY ...

Page 51: ...Rechargeable Battery Packing Add Unit SPAKA2678AFZZ Packing Case SPAKC6554AFZZ Spacer Unit SPAKZ0466AFZZ Operation Manual Quick Guide Pad AC Adaptor SPAKZ0464AFZZ AC Adaptor Polyethylene Bag Unit SSAKH0314AFZZ Carring Case Stereo Headphones Unit Not Replacement Item ...

Page 52: ...a retrieval system or transmitted in any from or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher A9801 2170NS HA J SC EX SHARP CORPORATION Audio Visual Systems Group Quality Reliability Control Center Higashihiroshima Hiroshima 739 01 Japan Printed in Japan ...