Sharp MD-MT821W(GL)- User Manual

Page 2 - SAFETY PRECAUTION FOR SERVICE MANUAL

MD-MT821/W – 2 – Precaution to be taken when replacing and servicing the laser pickup.The following precautions must be observed during servicing to protect your eyesagainst exposure to the laser. Warning of possible eye damage when repairing:If the AC adaptor or batteries are connected when the top...

Page 3 - SPECIFICATIONS

MD-MT821/W – 3 – FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TOTHE OPERATION MANUAL. General Power source: DC 3.6 V : Rechargeable lithium-ion (MT821) battery x 1 DC 5 V : AC adaptor (AC 120V, 60 Hz) DC 3.4V: Battery case (commercially available, "AA"size, alkaline...

Page 4 - NAMES OF PARTS; Remote control unit

MD-MT821/W – 4 – NAMES OF PARTS Remote control unit 1. Synchro Recording Indicator2. Character/Time Information Indicator3. Record Indicator4. Repeat Indicator: 5. Random Indicator6. Disc Mode Indicator7. Total Track Number Indicator8. Track Number Indicator9. Battery Indicator: 10. Headphones Jack ...

Page 5 - OPERATION MANUAL; Rechargeable battery power; Checking the remaining; There are cases where digital

MD-MT821/W – 5 – OPERATION MANUAL POWER SOURCE ■ Rechargeable battery power This unit can be used with 4 diff erent po wer sources: a rechargeab le batter y, an A C adaptor , a batter y case , and a separ ately av ailab le car adaptor (AD-CA20X). When the rechargeable battery is used for the first t...

Page 6 - TROUBLESHOOTING; MINIDISC SYSTEM LIMIT

MD-MT821/W – 6 – Many potential “problems” can be resolved by the owner without calling a service techni- cian. If something seems to be wrong with this product, check the following before calling your authorised SHARP dealer or service centre. PROBLEM CAUSE The unit does not turn on. ● Is the A C a...

Page 7 - ERROR MESSAGES

MD-MT821/W – 7 – ● The battery run down. ● Nothing is recorded. ● No copy can be made because of the SCMS copyright system. ● A track cannot be edited. ● Recording cannot be performed correctly due to vibration or shock in the unit. ● Editing is impossible. ● The disc is scratched. ● Poor connection...

Page 8 - wer sour; POR; Conexión; Analog recor

MD-MT821/W – 8 – QUICK GUIDE (MD-MT821 ONLY) 1 Check the supplied accessories / Compruebe los accesorios suministrados 1 RELEASE LOCK 3 1 2 2 2 P o wer sour ce / Alimentación POR T ABLE MINIDISC RECORDER Quick Guide/Guía rápida MD-MT821 ● Handstrap x 1 ● Correa para la muñeca x 1 ● Carrying Bag x 1 ...

Page 9 - Grabación; Recording from CDs or MDs (Synchro recording); Grabación de un micrófono (Grabación sincronizada con micrófono); Playing a MiniDisc /; Control del sonido

MD-MT821/W – 9 – 2 1 3 R E C L E V E L REC EN TE R SY NC 2 1 3 R E C L E V E L REC EN TE R SY NC 2 1 3 4 Recording / Grabación After recording: Después de la grabación: T o remo ve the MiniDisc: Para extraer el minidisco: T urn off the po wer and mo ve the OPEN lever in the direction indicated b y t...

Page 10 - DISASSEMBLY; Remove the batteries from the machine, and take out the; REMOVAL; Bottom Lid; Main PWB; Note; Open or close the battery cover as shown below.

MD-MT821/W – 10 – 1 Bottom Lid 1. Screw ..................... (A1) x5 10-1 2 Top Cabinet 1. Open the disc lid 10-12. Screw ..................... (B1) x43. Flexible PWB .......... (B2) x2 10-3 3 Center Cabinet A 1. Hook ...................... (C1) x2 10-2 4 Center Cabinet B 1. Remove in the arrow dir...

Page 11 - REMOVING AND REINSTALLING THE MAIN PARTS; MD Mechanism; Shft

MD-MT821/W – 11 – REMOVING AND REINSTALLING THE MAIN PARTS Remove the mechanism according to the disassembling meth-ods 1 to 6. (See Page 10.) How to remove the spindle motor (See Fig. 11-1.) 1. Remove the solder joint (A1) x 1 of flexible PWB.2. Remove the screws (A2) x 3 pcs., and remove the spind...

Page 12 - Entering the TEST mode; ADJUSTMENT; Test disc; Type; Note: Use the low reflection disc on which music has been recorded.; Leaving the TEST mode

MD-MT821/W – 12 – Entering the TEST mode 1. Setting at port (in standby state, disc-free state or power nonconnected state) (1) Set the port as follows. TEST1 : "Low" TEST0 : "High"(2) Press the PLAY button in the standby state (it is allowed to insert the disc or to connect the powe...

Page 13 - Operation in each TEST mode

MD-MT821/W – 13 – Operation in each TEST mode 1. AUTO1 Mode • When the STOP button is pressed while the AUTO1 menu appears or during automatic adjustment, the mode changes to the TEST mode stop state. At this time the adjustment value is not output. • Be sure to adjust, using the specified disc MMD-...

Page 15 - Temperature reference setting method

MD-MT821/W – 15 – EEPROM (IC402) writing procedure 1. Procedure to replace EEPROM and write initial value of microcomputer in EEPROM (1) Replace EEPROM.(2) Deprive EEPROM of protection (connect the pins 8 and 6 of IC402).(3) Refer to the latest EEPROM data list.(4) Press the Display/Lower-case Chara...

Page 18 - Continued to

MD-MT821/W – 18 – : ATT Autoadjustment menu : ATT adjustment error (adjustment value output) : During ATT autoadjustment Adjustment error Normal end : ATT adjustment normal end (adjustment value output) : Continuous playback (high reflection) : Continuous playback (low reflection) PLAY PLAY A U T O ...

Page 19 - : RF side focus gain minor adjustment; : ATT manual adjustment menu

MD-MT821/W – 19 – : RF side focus gain minor adjustment : Gain setting : A-ATT (focus) initial setting : ATT setting : B-ATT (focus) initial setting : ATT setting : S gain "High" A signal offset (AINO) measurement : Measurement value : S gain "High" B signal offset (BINO) measurement...

Page 20 - : ATT Setting Check menu

MD-MT821/W – 20 – : Pre-Adjustment Value Check menu : S gain "High" A signal offset measurement value (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 meas...

Page 21 - T R E C

MD-MT821/W – 21 – : Continuous playback menu : Continuous playback (pit section) : Continuous playback (groove section) # # # # : Address : Continuous playback (pit section) : Continuous playback (groove section) # # # # : Address PLAY T P L A Y Continuous Playback S Q # # # # A P # # # # * When the...

Page 24 - PLAY

MD-MT821/W – 24 – : Tracking setting menu PLAY T r a c k Tracking Setting T G T F 1 SKIP UP SKIP DOWN T F 2 SKIP UP SKIP DOWN T F S SKIP UP SKIP DOWN T B o SKIP UP SKIP DOWN T B t SKIP UP SKIP DOWN T K o SKIP UP SKIP DOWN T K t SKIP UP SKIP DOWN T D o SKIP UP SKIP DOWN T D t SKIP UP SKIP DOWN * When...

Page 27 - nd digit

MD-MT821/W – 27 – Continued from the preceding page D R H SKIP UP SKIP DOWN P L E SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN R C E E L T S L T SKIP UP SKIP DOWN S P M SKIP UP SKIP DOWN SKIP UP SKIP DOWN SKIP UP SKIP DOWN M S L U S 0 SKIP UP SKIP DOWN SKIP UP SKIP DOWN U S 1 U S 2 * When t...

Page 28 - NOTES ON SCHEMATIC DIAGRAM; • The indicated voltage in each section is the one measured; POSITION; Figure 28 TYPES OF TRANSISTOR AND DIODE

MD-MT821/W – 28 – SW401 EJECT OFF—ON SW402 HOLD OFF—ON SW403 DISC IN OFF—ON SW902 DISC PROTECT OFF—ON NOTES ON SCHEMATIC DIAGRAM • Resistor: To differentiate the units of resistors, such symbol as K andM are used: the symbol K means 1000 ohm and the symbolM means 1000 kohm and the resistor without a...

Page 29 - Figure 29 BLOCK DIAGRAM; PLA

MD-MT821/W – 29 – Figure 29 BLOCK DIAGRAM IC651 MOTOR DRIVER LB1930M VCC IC351 HEAD DRIVER 74ACT02T VCC @ VEE BATTERY CASE (BOOSTER CIRCUIT BUILT-IN) RECHARGEABLE BATTERY M903 LIFT MOTOR SERIES REGULATOR IC830 IR3M12N DC/DC CONVERTER IC501 AD/DA CONVERTER AK4519VF M902 SLED MOTOR IC101 RF SIGNAL PRO...

Page 30 - • NOTES ON SCHEMATIC DIAGRAM can be found on page 28.; ENDEC; LSI

MD-MT821/W – 30 – A B C D E F G H 1 2 3 4 5 6 Figure 30 SCHEMATIC DIAGRAM (1/4) P30 P31 P32 • NOTES ON SCHEMATIC DIAGRAM can be found on page 28. OPTICAL PICKUP UNIT 16 R422 100K L204 R207 680 18 15 14 13 D351 SBE803 5 4 3 2 1 TP602 R920 100K Q901 RN1104 R361 15 C361 0.039 C351 18P (CH) IC354 HAT205...

Page 36 - To Main PWB

MD-MT821/W – 36 – Figure 36 WIRING OF P.W.BOARD (3/3) A B C D E F G H 1 2 3 4 5 6 Optical Pickup Unit (15) Magnetic Head Flexible PWB (23) Magnetic Head (30) Mechanism Flexible PWB Ass'y (8) M902Sled Motor M903Lift Motor PH901PhoteInterrupter M901Spindle Motor SW902DiscProtect To Main PWB CN601 To M...

Page 37 - WAVEFORMS OF MD CIRCUIT; TP; with EEPROM control setting. After

MD-MT821/W – 37 – WAVEFORMS OF MD CIRCUIT NORM:200kS / s 1994 / 12 / 15 22:54:19 =Filter= =Offset= =Record Length= Smoothiing : OFFBW : FULL CH1 : 0.00VCH2 : 0.000V Main : 10KZoom : 10K CH3 : 0.00VCH4 : 0.00V =Trigger= Mode : NORMALType : EDGE CH4Detay : 0.0nsHold OFF : MINIMUM T TP208 (FEOUT) CK204...

Page 38 - TROUBLE SHOOTING; When does not function; • Power is not turned on when the / button

MD-MT821/W – 38 – TROUBLE SHOOTING It is advisable to use the TEST mode (refer to Error Data Display Mode, P13) indicating the causes of troubles beforestarting repair. Causes of operation errors (up to 10 errors) are recorded as error codes. This information is usefulfor repair. When does not funct...

Page 41 - FUNCTION TABLE OF IC; Function

MD-MT821/W – 41 – 1 P12/TCLKA CIN Input Track cross signal/focus drive detection 2 TCLKB SPIN Input Spindle motor FG pulse detection input 3* P14 P14 Output (not used) 4 P15 DISCPR Input Disc record inhibition switch input 5* TIOCA2 SPWDS Input Spindle motor FG pulse width detection 6 P17 PDCNT Outp...

Page 43 - PARTS GUIDE; Parts marked with “; “HOW TO ORDER REPLACEMENT PARTS”; following information.; Explanation of capacitors/resistors parts codes; Contact your nearest SHARP Parts Distributor to order.; Capacitors; VC • • • • • • • • • J .. The 13th character represents capacity difference.; Resistors; VR • • • • • • • • • J .. The 13th character represents error.; MODEL

MD-MT821/W – 43 – PARTS GUIDE NOTE: Parts marked with “ ” are important for maintaining the safety of the set. Be sure to replace parts with specified ones for maintaining the safety and performance of the set. “HOW TO ORDER REPLACEMENT PARTS” To have your order filled promptly and correctly, please...

Page 44 - PRICE; DESCRIPTION

PRICE RANK DESCRIPTION NO. PARTS CODE NO. PARTS CODE PRICE RANK DESCRIPTION MD-MT821/W – 1 – L751,752 VPBNN100M0000 J AC 10 µ H L771 RCILC0359AFZZ J AC 100 µ H,Choke L821 RCILC0282AFZZ J AC 22 µ H,Choke L851 RCILC0332AFZZ J AC 4.7 µ H,Choke L852 RCILC0333AFZZ J AC 10 µ H,Choke L862 RCILC0359AFZZ J A...

Page 45 - RESISTORS

NO. PRICE RANK DESCRIPTION PARTS CODE NO. PARTS CODE PRICE RANK DESCRIPTION MD-MT821/W C765,766 RC-KZ1205AFZZ J AB 0.33 µ F,10V C771 VCSATE0JJ476M J AD 47 µ F,6.3V,Electrolytic,Tantalum C773 RC-KZ1204AFZZ J AB 0.22 µ F,10V C774 VCKYTV1CF105Z J AB 1 µ F,16V C775 VCKYCY1EB103K J AA 0.01 µ F,25V C800 R...

Page 46 - ACCESSORIES

PRICE RANK DESCRIPTION NO. PARTS CODE NO. PARTS CODE PRICE RANK DESCRIPTION MD-MT821/W 211 PSHEZ1022AFZZ J AB Sheet,Extension Battery Terminal 212 QTANB9401AFFQ J AC Terminal,Battery + 213 QTANB9402AFFQ J AB Terminal,Battery - 214 PFLT-1145AFZZ J AB Pickup Flexible PWB Protect Felt 215 GFTAB1365AFSC...

Page 47 - OTHER SERVICE PARTS

NO. PRICE RANK DESCRIPTION PARTS CODE NO. PARTS CODE PRICE RANK DESCRIPTION MD-MT821/W TINSZ1393AFZZ J AH Operation Manual [MT821] TINSZ1394AFZZ J AE Quick Guide [MT821 Only] TINSZ1395AFZZ J AR Operation Manual [MT821W] TLABG0527AFZZ J AC Label,Hong Kong [MT821W for Hong Kong] TLABG0527AFZ1 J AC Lab...

Page 48 - Figure 5 MD MECHANISM EXPLODED VIEW

MD-MT821/W A B C D E F G H 1 2 3 4 5 6 Figure 5 MD MECHANISM EXPLODED VIEW – 5 – M903 M902 M901 503x2 502x3 509x2 501x2 11 505 30 23 510 513 8-2 (SW902) 8-1 8 8-3(PH901) 508 503 508 9 25 17 1 2 16 18 15 512 511 27 504 13 503 5 3 10 29 20 4 28 26 6 7 506

Page 50 - SETTING POSITION OF SWITCHES AND KNOBS

MD-MT821/W – 7 – PACKING OF THE SET (MD-MT821 ONLY) SETTING POSITION OF SWITCHES AND KNOBS UNIT HOLD OFF Remote Control HOLD CANSEL Battery Case Connecting Cord,RCA Type AC Adaptor Headphones Remote Control Packing Add.SPAKA2704AFZZ Packing CaseSPAKC6785AFZZ Pad, AC AdaptorSPAKZ0489AFZZ Rechargeable...

Page 51 - — M E M O —

MD-MT821/W COPYRIGHT 1999 BY SHARP COPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced,stored in a retrieval system, or transmitted inany from or by any means, electronic, mechanical,photocopying, recording, or otherwise, withoutprior written permission of the publisher. A9...

Sharp MD-MT821W(GL)- User Manual

Table of Contents:

Summary

Other Sharp Models