Sharp IM-DR400E Service Manual
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Sharp IM-DR400E Service Manual

Sharp IM-DR400E Service Manual

1-bit portable minidisc recorder
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Illustration IM-DR400E
Illustration IM-DR410H/E
Illustration IM-DR420H
SAFETY PRECAUTION FOR SERVICE MANUAL ............................................................................................................... 2
SPECIFICATIONS ................................................................................................................................................................. 3
NAMES OF PARTS ............................................................................................................................................................... 5
DISASSEMBLY ...................................................................................................................................................................... 8
REMOVING AND REINSTALLING THE MAIN PARTS ......................................................................................................... 9
ADJUSTMENT ...................................................................................................................................................................... 10
MD ERROR MESSAGE DISPLAY CONTENT LIST ........................................................................................................... 21
NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 22
TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 22
BLOCK DIAGRAM ............................................................................................................................................................... 23
SCHEMATIC DIAGRAM ...................................................................................................................................................... 24
WIRING SIDE OF P.W.BOARD ........................................................................................................................................... 28
WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 31
VOLTAGE ............................................................................................................................................................................ 32
TROUBLESHOOTING ......................................................................................................................................................... 33
FUNCTION TABLE OF IC .................................................................................................................................................... 36
PARTS GUIDE/EXPLODED VIEW
SERVICE MANUAL
1-BIT PORTABLE MINIDISC RECORDER
CONTENTS
SHARP CORPORATION
IM-DR400E/410H/E/420H
IM-DR400E(S)
IM-DR410H/E(S)
IM-DR420H(S)
MODEL
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
No. SX374IMDR420H
Page

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  • Page 1: Table Of Contents

    IM-DR400E/410H/E/420H SERVICE MANUAL No. SX374IMDR420H 1-BIT PORTABLE MINIDISC RECORDER IM-DR400E(S) IM-DR410H/E(S) Illustration IM-DR400E IM-DR420H(S) MODEL Illustration IM-DR410H/E • In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used.

  • Page 2: Safety Precaution For Service Manual

    IM-DR400E/410H/E/420H SAFETY PRECAUTION FOR SERVICE MANUAL Precaution to be taken when replacing and servicing the Laser Pickup. THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR CLASS 1.

  • Page 3: Specifications

    IM-DR400E/410H/E/420H FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. SPECIFICATIONS IM-DR400E/410H/E Power source: DC 3 V: AC adaptor (AC 110 - 240 V, 50/60 Hz) DC 1.5 V: Commercially available, "AA" size (LR6), alkaline battery x 1...
  • Page 4 IM-DR400E/410H/E/420H IM-DR420H Power source: DC 1.2 V: Rechargeable Nickel-Metal Hydride Battery (AD-N70BT) x 1 DC 3 V: AC adaptor (AC 110 - 240 V, 50/60 Hz) DC 1.5 V: Commercially available, "AA" size (LR6), alkaline battery x 1 Power consumption:...

  • Page 5: Names Of Parts

    9. Record/Track Mark Button 10. Bass/Delete/Synchro Button 11. 3 V DC Input Socket Note: When the battery cover comes off, attach the cover back as shown below. Illustration IM-DR400E Main unit 1. Open Lever 2. Battery Cover 3. Menu/Enter Button 4. Play/Pause/Stop/Power Off/Hold/...
  • Page 6 5. Monaural Mode Indicator 6. Battery Indicator 7. Play Indicator 8. Pause Indicator 9. Disc Name Indicator 10. Record Indicator 11. Synchro Recording Indicator 9 10 11 12. Character/Time Information Indicator 13. TOC Indicator 14. Track Number Indicator Illustration IM-DR400E/IM-DR410H/E – 6 –...
  • Page 7 IM-DR400E/410H/E/420H Display panel 1. Level Meter 1 2 3 2. Random Indicator 3. Repeat Indicator 4. Long-Play/Recording Mode Indicator 5. Monaural Mode Indicator 6. Battery Indicator 7. Play Indicator 8. Pause Indicator 9. Disc Name Indicator 10. Record Indicator 9 10 11 11.

  • Page 8: Disassembly

    IM-DR400E/410H/E/420H DISASSEMBLY (C1) x2 (A3) x2 ø1.4x2.5mm Cares before disassembling (C2) x1* (C2) x1 When assembling the machine after disassembling or repair, observe the following requirements so as to ensure safety and performance. (C1) x1 1. Remove the batteries from the machine, and take out the Main PWB ø1.4x2.5mm...

  • Page 9: Removing And Reinstalling The Main Parts

    IM-DR400E/410H/E/420H REMOVING AND REINSTALLING THE MAIN PARTS Remove the mechanism according to the disassembling meth- (A2) x2 ods 1 to 4. (See Page 8.) ø1.4 x1.8mm How to remove the magnetic head (See Fig. 9-1.) Magnetic head 1. Remove the solder joints (A1) x 2 of the head flexible plate.

  • Page 10: Adjustment

    IM-DR400E/410H/E/420H ADJUSTMENT Test disc MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high reflection disc). Type Test disc Parts No. High reflection disc MMD-110 (TEAC Test MD) 88GMMD-110 Low reflection disc MMD-212 (TEAC Test MD) 74-minute disc...
  • Page 11 IM-DR400E/410H/E/420H Operation in each TEST mode Test Mode Change Chart Test Mode Menu T E S T : Test Mode STOP FAST FORWARD FAST REVERSE Slide external Slide internal periphery move periphery move BASS FAST REVERSE A U T O 1...
  • Page 12 IM-DR400E/410H/E/420H ATT Auto Adjustment A U T O 2 : ATT auto adjustment menu PLAY A T 2 : During ATT auto adjustment Adjustment error A D J . N G Normal end : ATT adjustment error (adjustment value output) : ATT adjustment normal end (adjustment value output) A D J .
  • Page 13 IM-DR400E/410H/E/420H • Whenever the MENU button is pressed in the continuous playback mode, the indication changes as follows. * Pre-mastered disc Continuous playback (SUBQ address indication) [ S Q Continuous playback (C1 error indication) [ C E Continuous playback (SUBQ address indication) [ S Q...
  • Page 14 IM-DR400E/410H/E/420H NORMAL Mode • When the STOP button is pressed while the NORMAL menu appears, the mode changes to the TEST mode stop state. • Indication during operation Indication of memory capacity on main unit LCD ] + Level meter...
  • Page 15 IM-DR400E/410H/E/420H Error History Display • Error history clear D A T A : Error history display menu MENU C L E A R : Error history clear • Error history display D A T A : Error history display menu PLAY E 0 §...
  • Page 16 IM-DR400E/410H/E/420H 2. Temperature reference setting method EEPROM (IC402) writing procedure [1] Measurement, calculation and setting procedure 1. Procedure to replace EEPROM and write initial (1) Set the TEST mode. (Perform one of the following value of microcomputer in EEPROM methods.) (1) Replace EEPROM.
  • Page 17 IM-DR400E/410H/E/420H EEPROM DATA LIST (EEPROM version d) (IM-DR400/IM410H/E) *No settings are required for the Reserve items. +01H +00H ADDRESS +01H ADDRESS +00H CODE ITEM ITEM CODE ITEM CODE ITEM CODE 0400 0476 119 0402 0478 121 0404 047A 123 0406...
  • Page 18 IM-DR400E/410H/E/420H +01H +01H +00H ADDRESS +00H CODE CODE ITEM ITEM CODE ITEM ITEM CODE 04EC 237 0528 297 RM30 RM31 04EE 239 052A 299 RM32 RM33 04F0 241 052C 301 RM34 RM35 04F2 243 052E 303 Reserve Reserve 04F4 245...
  • Page 19 IM-DR400E/410H/E/420H EEPROM DATA LIST (EEPROM version s) (IM-DR420H) *No settings are required for the Reserve items. +01H +00H +01H +00H ADDRESS ITEM CODE ITEM CODE CODE ITEM ITEM CODE 0400 0476 119 0402 0478 121 0404 047A 123 0406 047C 125...
  • Page 20 IM-DR400E/410H/E/420H +01H +01H ADDRESS +00H ADDRESS +00H CODE CODE ITEM ITEM CODE ITEM ITEM CODE 04EC 237 0528 297 RM30 RM31 04EE 239 052A 299 RM32 RM33 04F0 241 052C 301 RM34 RM35 04F2 243 052E 303 Reserve Reserve 04F4 245...

  • Page 21: Md Error Message Display Content List

    IM-DR400E/410H/E/420H MD ERROR MESSAGE DISPLAY CONTENT LIST Remarks Error content Error code Display content BLANK MD Nothing is recorded. (Replace the disc with a recorded disc) BATT EMPTY The battery has run down. Can' t READ* Readout of the information is not a: Auto-adjust ERROR completed.

  • Page 22: Notes On Schematic Diagram

    IM-DR400E/410H/E/420H NOTES ON SCHEMATIC DIAGRAM • Resistor: • The indicated voltage in each section is the one measured To differentiate the units of resistors, such symbol as K and by Digital Multimeter between such a section and the chas- M are used: the symbol K means 1000 ohm and the symbol sis with no signal given.

  • Page 23: Block Diagram

    IM-DR400E/410H/E/420H IM-DR420H ONLY IM-DR420H ONLY MCPGIN 0-2V +2-4.5V MCNT DCEXT AMUTE PCONT1 PCNT3 OPTCNT PWSCIO VCCMICOM DFCKC BTRON D811 VCC+4.5V CORCT2 Figure 23 BLOCK DIAGRAM – 23 –...

  • Page 24: Schematic Diagram

    IM-DR400E/410H/E/420H IC354 CPH5608 HEAD DRIVER R361 TP661 LDVAR TP660 TP10 C361 TP659 0.039 LDON TP10 TP658 DGND C351 TP657 DGND TP656 (CH) TP655 TP10 TP654 TP10 TP653 TP10 TP652 CVCC TP651 MP/R AGND TP351 Q351 TP12 FDG312 P T– TP121 F–...
  • Page 25 IM-DR400E/410H/E/420H LDVAR TP101 LDON TP102 L104 L103 TP103 DGND DGND 100MHz100MHz TP105 TP106 TP107 CVCC MP/R TP110 TP111 AGND TP114 TP115 TP116 TP117 TP118 TP119 TP120 R132 T– TP121 R134 VREF F– C114 5P(CH) BOUT R135 R111 EOUT R137 PITG...
  • Page 26 IM-DR400E/410H/E/420H VCC_SERVO R831 390K(D) IC813 C813 C870 47/6.3 0.033 TC7LCX244MTC C831 C815 BUFFER/LINE 10/6.3 R833 C823 390K 47P(CH) RFPCNT C814 DRIVER EIP2 EIP1 C332 CK82 EIN1 AUPON CTL2 CTL1 DSEL R856 470K(D) R855 470K(D) C853 180P(CH) 0-2V +2.5V +2-4.5V R821...
  • Page 27 IM-DR400E/410H/E/420H DFCK IC751 +2.4V TP500 74LCX00 ADDATA SDTO BCLK QUAD 2-IN BCLK DFCK MCLK LRCK NAND GATE C503 VCOM LRCK AUDATA 3.3/10 CDTI RIN2 AUSCLK CCLK LIN2 RCAULT RIN1 C511 LIN1 0.001 ADPON R511 C332 C521 R504 C707 AMP1 AMP2 47/6.3...

  • Page 28: Wiring Side Of P.w.board

    IM-DR400E/410H/E/420H MAIN PWB-A (BOTTOM VIEW) IM-DR420H ONLY J701 J703 J702 OPTICAL REMOTE/PHONES /LINE IN J301 TP804 L752 J801 DC IN 5V TP712 SW901 DISC PROTECT L762 IC311 B301 TP308 F301 PSW1 C307 C809 R809 IC81 R340 R342 R311 1 2 3...
  • Page 29 IM-DR400E/410H/E/420H MAIN PWB-A (TOP VIEW) J701 J703 OPTICAL J702 REMOTE/PHONES /LINE IN J301 L456 L714 L801 R713 R714 D494 J801 C800 C714 CHASSIS C772 DC IN 5V L711 R774 R773 L704 R504 R810 L491 R501 D801 C771 C710 R502 C709...
  • Page 30 IM-DR400E/410H/E/420H P29 8-D TO MAIN PWB CN601 MAGNETIC HEAD (16) M902 SLED MOTOR MECHANISM FLEXIBLE PWB (15) LCD UNIT (226) M901 SPINDLE MOTOR M903 LIFT MOTOR CN101 P29 9-F TO MAIN PWB P29 10-D TO MAIN PWB CN482 OPTICAL PICKUP (17)

  • Page 31: Waveforms Of Md Circuit

    IM-DR400E/410H/E/420H WAVEFORMS OF MD CIRCUIT Stopped Stopped 1994 / 12 / 16 00:24:17 Stopped 1994 / 12 / 15 22:54:19 1994 / 12 / 16 01:03:40 CH1=1mV CH2=500mV CH3=5V CH4=2V 50ms/div CH1=2V CH2=2V CH3=2V CH4=2V 50us/div CH1=1V CH2=2V CH3=500mV 2ms/div...

  • Page 32: Voltage

    IM-DR400E/410H/E/420H VOLTAGE Q211 IC401 IC601 IC771 IC81 IC201 VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE PIN VOLTAGE VOLTAGE VOLTAGE VOLTAGE VOLTAGE VOLTAGE 2.60V 1.08V 1.30V 4.76V 1.26V 2.58V 1.30V 0.60V 1.99V 2.58V 2.58V 1.32V 2.60V 1.99V 2.57V 1.33V 2.58V 2.57V 2.58V...

  • Page 33: Troubleshooting

    IM-DR400E/410H/E/420H TROUBLESHOOTING It is advisable to use the TEST mode (refer to Error Data Display Mode, P9) indicating the causes of troubles before starting repair. Causes of operation errors (up to 10 errors) are recorded as error codes. This information is useful for repair.
  • Page 34 IM-DR400E/410H/E/420H • Audio playback circuit Although the playback time display is acting., no sound is given during playback in the normal mode. Is PWM signal output from IC201 pins 68, 69, 72, 73? Check the periphery of IC201. Check whether there is defective solder joint of audio signal Is audio waveform output from J703A pins 1,2,3,4.
  • Page 35 IM-DR400E/410H/E/420H • Recording/playback operation. Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode. Change MSL from 00H to 80H by the control setting of EEPROM. After completing the operation, return in to 00H.

  • Page 36: Function Table Of Ic

    IM-DR400E/410H/E/420H FUNCTION TABLE OF IC IC401 RH-iX0606AW00 :System Microcomputer (IX0606AW) (1/3) Port Name Terminal Name Input/Output Function Pin No. CKSTP Output Microcomputer operation monitor output LDON Output P.U. laser ON/OFF control output LDVAR Output P.U. laser power setting output MCMON...
  • Page 37 IM-DR400E/410H/E/420H IC401 RH-iX0606AW00 :System Microcomputer (IX0606AW) (2/3) Pin No. Port Name Terminal Name Input/Output Function P133 PWSCCR Output Security chip core power control P132 PWSCIO Output Security chip IO power control P131 MSENSE Output Microphone sensitivity switching output P130 MCNT...
  • Page 38 IM-DR400E/410H/E/420H IC401 RH-iX0606AW00 :System Microcomputer (IX0606AW) (3/3) Terminal Name Input/Output Function Pin No. Port Name 101* Output Reserve 102* Output Reserve 103* Output Reserve 104* Output Reserve 105* Output Reserve 106* Output Reserve PLVBTT Input Battery voltage detection (without amp)
  • Page 39 IM-DR400E/410H/E/420H IC601 VHiLV8221T+-1 :PWM/Motor Driver (LV8221T)(1/2) Pin No. Terminal Name Function SPGND Ground terminal of spindle output. SPVS Power supply terminal for spindle drive . The capacitor is connected to the GND terminal. Position detection comparator filter terminal in the spindle motor. The capacitor is connected between this terminal and COMIN terminal (pin).
  • Page 40 IM-DR400E/410H/E/420H IC601 VHiLV8221T+-1 :PWM/Motor Driver (LV8221T)(2/2) Pin No. Terminal Name Function SLVS Drive power terminal in 3-phase thread section. The capacitor is connected to the GND terminal. FG pulse output terminal (MOS output). It outputs the pulse equivalent to 3-hole.
  • Page 41 IM-DR400E/410H/E/420H IC202 RH-iX2960AFZZ: 16M Bit D-RAM (IX2960AF) Function Terminal Name Pin No. Power supply (2.6V) I/O1 Data input/data output I/O2 Data input/data output Write enable Low address strobe Not connected Address input 8-11 A0-A3 Address input Power supply (2.6V) Ground (0V)
  • Page 42 IM-DR400E/410H/E/420H — M E M O — – 42 –...
  • Page 43 “HOW TO ORDER REPLACEMENT PARTS” To have your order filled promptly and correctly, please furnish the For U.S.A. only following information. Contact your nearest SHARP Parts Distributor to order. 1. MODEL NUMBER 2. REF. No. 3. PART NO. 4. DESCRIPTION For location of SHARP Parts Distributor, Please call Toll-Free;...
  • Page 44 IM-DR400E/410H/E/420H PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PART CODE RANK RANK INTEGRATED CIRCUITS D491 VHEMA8075M/-1 AC Zener,MA8075M D494 VHEMA8075M/-1 AC Zener,MA8075M D801 VHDDG1H3+++-1 AC Silicon,DG1H3 IC81 VHIMM1573DN-1 AE 3.3V Regulator,MM1573DN D802 VHEMA8039L/-1 AB Zener,MA8039-L IC101 VHIIR3R58M/-1 AM RF Signal Processor,IR3R58M...
  • Page 45 IM-DR400E/410H/E/420H PRICE PRICE DESCRIPTION PART CODE PARTS CODE DESCRIPTION RANK RANK AC 1 µF,6.3V C306 VCKYCY0JB105K VRS-CZ1JB000J AB 0 ohm,Jumper,0.5×1.0mm C307 VCCCCZ1HH330J AB 33 pF (CH),50V L491 VRS-TV2AB330J AA 33 ohms,1/10W AB 0.1 µF,10V C310 VCKYCZ1AB104K L712,713 VRS-CY1JB102J AA 1 kohm,1/16W...
  • Page 46 AP MD Lid [IM-DR410H/E] R825 VRS-CZ1JB562J AB 5.6 kohms,1/16W GFTAF1005AWSA J AN MD Lid [IM-DR420H] R826,827 VRS-CZ1JB273D AA 27 kohms,1/16W GFTAF1006AWSA J AP MD Lid [IM-DR400E] R828 VRS-CY1JB1R0J AA 1 ohm,1/16W HDECQ1069AWSA J AG Decoration Plate,Window R831 VRS-CZ1JB394D AA 390 kohms,1/16W [IM-DR410H/E]...
  • Page 47 TGANE0013AWZZ J AC Warranty Card [For U.K. Only] TINSE0550AWZZ AG Operation Manual [IM-DR410E] TINSE0554AWZZ AG Operation Manual [IM-DR420H For U.K.] TINSE0562AWZZ AG Operation Manual [IM-DR400E] TINSZ0960AWZZ AP Operation Manual [IM-DR410H For Sweden] TINSZ0961AWZZ AP Operation Manual [IM-DR410H For Europe] TINSZ0964AWZZ...
  • Page 48 IM-DR400E/410H/E/420H 501x3 503x2 506x2 M901 M902 M903 Figure 5 MD MECHANISM EXPLODED VIEW – 5 –...
  • Page 49 IM-DR400E/410H/E/420H IM-DR400E/420H IM-DR410H/E MD MECHANISM 602x2 IM-DR420H Only PWB-A IM-DR400E/420H 602x2 IM-DR410H/E IM-DR420H Only 605x3 Figure 6 CABINET EXPLODED VIEW – 6 –...

  • Page 50: Packing Of Method(For U.k. Only)

    16. Operation Manual [IM-DR410E] TINSE0550AWZZ 5. AC Adapter RADPA8066AWZZ 16. Operation Manual [IM-DR420H] TINSE0554AWZZ 6. Earphones [IM-DR420H] RPHOH0021AWZZ 16. Operation Manual [IM-DR400E] TINSE0562AWZZ 6. Earphones [IM-DR410H/E/400E] RPHOH0026AWZZ 17. Operation Manual,Net MD TINSE0553AWZZ 7. Remote Control [IM-DR420H] RRMCW0033AWSA 18. Quick Guide [IM-DR410E] TINSE0551AWZZ 8.
  • Page 51 IM-DR400E/410H/E/420H — M E M O — – 8 –...
  • Page 52 IM-DR400E/410H/E/420H © COPYRIGHT 2003 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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