Service manual

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MD-SR50H/50W/60E/60W

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CONTENTS

Page

SAFETY PRECAUTION FOR SERVICE MANUAL ............................................................................................................... 2

SPECIFICATIONS ................................................................................................................................................................. 3

NAMES OF PARTS ............................................................................................................................................................... 4

OPERATION MANUAL .......................................................................................................................................................... 5

DISASSEMBLY ...................................................................................................................................................................... 8

REMOVING AND REINSTALLING THE MAIN PARTS ......................................................................................................... 9

ADJUSTMENT ...................................................................................................................................................................... 10

NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 23

TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 23

VOLTAGE ............................................................................................................................................................................ 24

BLOCK DIAGRAM ............................................................................................................................................................... 25

SCHEMATIC DIAGRAM ...................................................................................................................................................... 26

WIRING SIDE OF P.W.BOARD ........................................................................................................................................... 28

WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 31

TROUBLESHOOTING ......................................................................................................................................................... 32

FUNCTION TABLE OF IC.................................................................................................................................................... 35

PARTS GUIDE/EXPLODED VIEW

PACKING METHOD (MD-SR50H for U.K./SR60E Only)

SERVICE MANUAL

SHARP CORPORATION

No. S2006MDSR50H/

This document has been published to be used

for after sales service only.

The contents are subject to change without notice.

MD-SR50H(BL)

MD-SR50H(S)

MD-SR50H(YR)

MD-SR50W(BL)

MD-SR50W(S)

MD-SR60E(GL)

MD-SR60W(S)

• In the interests of user-safety the set should be restored to its

original condition and only parts identical to those specified be

used.

Illustration: MD-SR50H/SR50W

Illustration: MD-SR60E/SR60W

Summary of content (48 pages)

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MD-SR50H/50W/60E/60W SERVICE MANUAL No. S2006MDSR50H/ MD-SR50H(BL) MD-SR50H(S) MD-SR50H(YR) MD-SR50W(BL) MD-SR50W(S) MD-SR60E(GL) MD-SR60W(S) Illustration: MD-SR50H/SR50W • In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used. Illustration: MD-SR60E/SR60W CONTENTS Page SAFETY PRECAUTION FOR SERVICE MANUAL ...............................................................................................................
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MD-SR50H/50W/60E/60W SAFETY PRECAUTION FOR SERVICE MANUAL Precaution to be taken when replacing and servicing the Laser Pickup. The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class I Requirements. However, the following precautions must be observed during servicing to protect your eyes against exposure to the laser beam.
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MD-SR50H/50W/60E/60W FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.
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MD-SR50H/50W/60E/60W NAMES OF PARTS ■ Remote control unit 1 2 3 4 5 6 7 1. Monaural Long-Play Mode Indicator 2. Record Indicator 3. Level Meter 4. Fast Play Indicator 5. Repeat Indicator 6. TOC Indicator 7. Battery Indicator 8. Random Indicator 9. Track Number Indicator 10. Character/Time Information Indicator 11. Synchro Recording Indicator 12. Disc Mode Indicator 13. Disc Name Indicator 14. Track Name Indicator 15. Remaining Recording Time Indicator 16.
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POWER SOURCE –5– Notes: ● After charging has been completed, the AC adaptor may be left connected. (For example, when charging at night.) ● The battery will not be charged when the power to the main unit is turned on. ● Do not force the battery cover open too far. ● Do not use a rechargeable battery or an AC adaptor other than those specified. ● The charging time will vary, depending on the condition of the battery.
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When the battery level is very low –6– Notes: ● If you use the battery which you stopped charging halfway, “ ” may appear. It does not mean that the battery is completely charged. ● When using the unit with an alkaline battery or a rechargeable battery, the battery indicator will not correctly display the remaining capacity for approximately 10 seconds after the power has been turned on.
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When the remaining recording time of a disc is displayed, short tracks less than 12 seconds long may not be included in the total. For MiniDiscs on which repeated recording and editing operations were performed, the COMBINE function may not work. A cluster (about 2 seconds) is normally the minimum unit of recording. So, even if a track is less than 2 seconds long, it will use about 2 seconds of space on the disc.
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MD-SR50H/50W/60E/60W DISASSEMBLY Cares before disassembling When assembling the machine after disassembling or repair, observe the following requirements so as to ensure safety and performance. 1. Remove the batteries from the machine, and take out the mini-disc. 2. When assembling after repair, be sure to restore the initial location of wires. Since the screws are small, incorrect fixing may result in malfunction. 3. When repairing, pay utmost attention to static electricity of IC.
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MD-SR50H/50W/60E/60W REMOVING AND REINSTALLING THE MAIN PARTS Remove the mechanism according to the disassembling methods 1 to 4. (See Page 8.) (A2)x3 ø1.4x2.8mm Spindle Motor How to remove the spindle motor (See Fig. 9-1.) 1. Remove the solder joint (A1) x 1 of flexible PWB. 2. Remove the screws (A2) x 3 pcs., and remove the spindle motor. Mechanism Flexible PWB Solder joint @ (A1)x1 How to remove the Lift motor (See Fig. 9-2.) 1. Remove the solder joints (B1) x 2 of head up/down motor lead wire. 2.
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MD-SR50H/50W/60E/60W ADJUSTMENT Test disc MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high reflection disc). Type Parts No.
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MD-SR50H/50W/60E/60W 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-213A or MMD-212. At this time release the EEPROM (IC402) protection. (Refer to EEPROM write procedure.
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MD-SR50H/50W/60E/60W 5. 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 : Internal mode : Address (Cluster section) : Address (Sector section) • Selection of sound volume, BASS, etc. is possible (without indication) • Recording is also possible.
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MD-SR50H/50W/60E/60W EEPROM (IC402) writing procedure 1. Procedure to replace EEPROM and write initial value of microcomputer in EEPROM (1) (2) (3) (4) Replace EEPROM. Refer to the latest EEPROM data list. Press the Display button, ENTER button and Play button to start the test mode. Version display [Ver. X ] EEPROM version (b ~ Z) Microcomputer ROM version (5) The whole LCD lights. (6) Test mode stop state. [ T E S T ] (7) Press the "BASS" button, and press twice the "SKIP DOWN" button.
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MD-SR50H/50W/60E/60W EEPROM DATA LIST (EEPROM version b) TEMP setting Sled setting Item display T M _ _ Set values Item display Calculate values Fucus setting Item display Set values Set values S L G _ DF S L 2 _ 20 H S L M _ 7F H S L V _ AB S K k _ 72 H H H F G _ _ B0 H S K t _ 4C H F F 1 _ 70 H S K m _ 70 H F F 2 _ E8 H W T m _ 24 H F Z H _ ED H M V 1 _ 44 H F L n _ 0A H M V 2 _ 88 H D J G _ 14 H S R V _ 00 H F L V _ 20 H W T f _ 20 H F S S
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TEST REC – 15 – SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN DATA SKIP DOWN SKIP DOWN : INNER switch position measurement menu : EEPROM setting menu : Error history display menu : Digital input signal monitor menu : Test mode normal playback menu : Continuous record menu : Continuous playback menu : ATT adjustment value check menu : Pre-adjustment value check menu : ATT manual adjustment menu : Pre-manual adjustment menu : ATT auto adjustment menu
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ADJ. NG Adjustment error : Continuous playback (high reflection) : Continuous playback (low reflection) : ATT adjustment normal end (adjustment value output) : ATT adjustment error (adjustment value output) : During ATT autoadjustment : ATT Autoadjustment menu * When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set. *" " represent the adjustment number as follows.
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REC PLAY : Continuous record menu PLAY REC : Continuous record # # # #: Address : Start address setting : Continuous record menu Ad0 3 c 0 Ad0 9 5 0 Ad0 7 0 0 Ad0 8 A 0 DISP – 17 – MODE Ad0 0 3 2 2nd digit MODE Ad0 0 3 2 : INNER switch position measurement menu MODE 3rd digit : TEST mode normal playback menu : Continuous playback @@@@@@: Mode and address display * When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
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SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN – 18 – SKIP DOWN : Control setting menu : Digital EQ setting menu : Adjustment setting menu : BASS setting menu : Sled setting menu : Spin setting menu : Tracking setting menu : Focus setting menu : TEMP setting menu : EEPROM setting menu SKIP DOWN SKIP DOWN : BASS setting menu * When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
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– 19 – SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN : Spin setting menu * When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set. * When the [DISP] button operation is performed in the specific state, the menu changes to "TEMP SETTING menu". * In specific state the setting changed in the range of "00h to FFh" when the [VOL UP/DOWN] button is pressed.
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– 20 – SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN * When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set. * When the [DISP] button operation is performed in the specific state, the menu changes to "TEMP SETTING menu". * In the specific state the setting changes in the range of "00h to FFh" when the [VOL UP/DOWN] button is pressed.
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– 21 – SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN : Digital EQ setting menu * In the specific state the setting changes in the range of "0h to Fh" when the [VOL UP/DOWN] button is pressed. * When the [MODE] button is pressed in each state, the set digit is changed. P-MODE P-MODE * When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
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– 22 – SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN SKIP DOWN P-MODE * In the specific state the setting changes in the range of "0h to Fh" when the [VOL UP/DOWN] button is pressed. * When the [MODE] button is pressed in each state, the set digit is changed. P-MODE * When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
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MD-SR50H/50W/60E/60W NOTES ON SCHEMATIC DIAGRAM • Resistor: To differentiate the units of resistors, such symbol as K and M are used: the symbol K means 1000 ohm and the symbol M means 1000 kohm and the resistor without any symbol is ohm-type resistor. Besides, the one with “Fusible” is a fuse type. • Capacitor: To indicate the unit of capacitor, a symbol P is used: this symbol P means micro-micro-farad and the unit of the capacitor without such a symbol is microfarad.
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MD-SR50H/50W/60E/60W VOLTAGE IC101 PIN NO. 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 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 VOLTAGE 0.71V 0.71V 0.71V 0.71V 1.24V 1.24V 0V 1.24V 1.24V 1.24V 1.24V 1.24V 2.28V 2.28V 0V 0V 2.48V 0V 0V 1.47V 2.35V 0V 0V 2.48V 1.24V 1.24V 1.24V 1.24V 1.24V 1.2V 1.24V 1.24V 1.24V 0V 1.24V 1.24V 0.16V 1.24V 1.24V 1.24V 1.24V 2.48V 0V — 1.24V 1.24V 1.24V 0.19V IC202 PIN NO.
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– 25 – Figure 25 BLOCK DIAGRAM 43 6 VG 39,41 17,21,27, 40,44 VM IC601 4-CH PWM DRIVER LV8017W PLAYBACK SIGNAL RECORD SIGNAL 6 7,30,35 VCC NC SW402 HOLD IC431 RESET S80820LN IC402 EEPROM 58X2402T 1 8 VDD +2.0V 6-9 9, 11, 13, 48 74 4 75,83 LCD ASS'Y 55, 59, 81, 82 1 SW401 EJECT SW403 LID DETECTION 40,65,77,78,98 19 +B +7V +2.35V 5 3 2 VCC 2 IC822 IR3M14N DC/DC CONVERTER +2.7V VCC 2 17 8 -2.5V L-CH 2 R-CH 3 F841 0.
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MD-SR50H/50W/60E/60W C112 0.033 TP206 C205 0.1 R206 270K L100 10µH C100 10/6.3 R416 100K PGND4 BAT3 OUT3 PGND5 L609 4.7 L610 4.7 L608 4.7 39 EMPH0 40 VCC 41 MCPGI 42 INPGI IN3 MUTE 4.7 N.C. EFMO N.C.
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MD-SR50H/50W/60E/60W R451 R452 R453 5.6K 8.2K 18K HPLAY HREC 1 EDIT 2 P-MODE 3 BASS 4 SKIP UP 5 VOL DOWN 6 VOL UP 7 ENTER 8 SKIP DOWN 9 STOP 10 PLAY 11 REC 12 GND 13 CN451 C481 1 TP481 1 IC202 IX2567AF 4M D-RAM TP482 TP483 C482 1 +B DSPDAT DSPSCK DSPSTB DSPRST 1 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 TP486 TP487 TP488 TP489 LCD LCD ASS`Y R454 56K HKEY1 DISPLY 1 2 3 4 5 6 7 8 9 10 11 12 13 LCD DRIVER TP451 TP452 TP453 TP454 TP455 TP456 TP457 TP458 TP459 TP460 TP461 TP462 TP463 R458 56K R456 8.
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MD-SR50H/50W/60E/60W A PWB-A(TOP VIEW) TP658 9 15 TP655 TP659 13 R101 IC402 8 R404 TP601 R403 TP660 CN601 TP661 C836 E 1 3 4 TP610 13 15 12 10 20 TP654 16 5 30 4 TP666 TP663 TP662 TP664 TP416 C609 IC601 5 45 TP210 C251 C253 R254 TP841 C482 TP458 R455 R458 R456 R457 1 TP451 15 20 TP713 IC501 R729 C721 TP712 1 R501 1 R716 5 L500 R754 C760 R757 R758 15 D496 R492 C492 TP723 13 24 TP772 8 3 5 7 2 TP728 TP727 8 TP453 R808 4 20 TO KEY FLEXIBLE PWB ASS'
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MD-SR50H/50W/60E/60W PWB-A(BOTTOM VIEW) R841 C846 3 C841 C847 F841 2 C848 D842 4 R850 1 R818 C818 C845 C850 C844 IC842 R844 SW403 LID DETECTION C202 20 15 16 11 IC841 C833 D831 L841 R202 1 C211 C208 L862 C869 C863 90 CK205 CK206 CK203 CK202 R204 CK201 CK204 C868 C862 Q461 95 C602 C601 10 13 15 L608 C608 R906 C905 C606 C652 R816 C904 D622 3 1 4 5 10 IC651 R813 R812 1 C803 IC801 2 DC IN J801 IC803 4 L771 7 C711 8 6 L703 L702 C762 R711 C774 C712
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MD-SR50H/50W/60E/60W Magnetic Head Flexible PWB (23) A M901 Spindle Motor Optical Pickup Unit (15) Magnetic Head (21) B SW902 Disc Protect Mechanism Flexible PWB (8) C PH901 Photo Interrupter D CN601 To Main PWB P28 1-E M902 Sled Motor CN101 To MAIN PWB P28 1-C M903 Lift Motor To MAIN PWB P28 6-E CN451 E To MAIN PWB P28 6-F CN482 F G H LCD Ass'y (214) Key Switch Flexible PWB Ass'y (213) 1 2 3 4 Figure 30 WIRING OF P.W.
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MD-SR50H/50W/60E/60W WAVEFORMS OF MD CIRCUIT T Stopped CH1=1mV DC 10:1 1 CH2=500mV DC 10:1 CH3=5V DC 10:1 TP208 (FEMON) 5 3 CK205 (SENSE) 4 CK204 (FOK) CH3=2V DC 10:1 9 T =Offset= CH1 : 0.00V CH2 : 0.000V CH3 : 0.00V CH4 : 0.00V =Record Length= Main : 10K Zoom : 10K T Stopped CH1=2V DC 10:1 TP601 (VM) T MCLK CH2=2V DC 10:1 =Trigger= Mode : NORMAL Type : EDGE CH4 Detay : 0.
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MD-SR50H/50W/60E/60W TROUBLESHOOTING It is advisable to use the TEST mode (refer to Error Data Display Mode, P19) 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. When does not function When the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.Clean the objective lens,and check the playback operation.
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MD-SR50H/50W/60E/60W • Abnormal display Is waveform output from CN482 pins 6 to 8? Are the pin 4 (VCC) and pin 5 (GND) normal? Is waveform output from IC401 pins 9,11,13? No No Yes Yes Check between IC401 and CN482. Check the periphery of IC401. Check for pattern breakage of flexible PWB, check for defects of display microcomputer (replace the display unit). • Playback state cannot be set When it has been ascertained that the address up to cluster address is normal in the TEST mode.
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MD-SR50H/50W/60E/60W • The spindle motor fails to run.Does the head move Does the waveform appear on the IC201 pins 24 and 25 after TEST mode AUTO2 completion and in this state? No Check the IC201 periphery. Yes Does waveform appear on the IC601 pin 43? No Replace. IC601 Yes Does waveform appear on IC901 pins 1, 2 and 23? No L608, IC201, IC901, CN601 and flex, etc. soldering check Yes Replace the spindle motor.
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MD-SR50H/50W/60E/60W FUNCTION TABLE OF IC IC401 RH-iX0341AWZZ: System Microcomputer (IX0341AW) (1/3) Pin No.
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MD-SR50H/50W/60E/60W IC401 RH-iX0341AWZZ: System Microcomputer (IX0341AW) (2/3) Pin No.
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MD-SR50H/50W/60E/60W IC401 RH-iX0341AWZZ: System Microcomputer (IX0341AW) (3/3) System LSI expansion output port (6th generation: LR37811) Pin No. Port Name Terminal Name Input/Output Function Remarks 52 EXPORT0 LDCNT1 Output Recording head raising-lowering control output 1 See the separate table *3. 53 EXPORT1 LDCNT2 Output Recording head raising-lowering control output 2 See the separate table *3. 54 EXPORT2 — Output Not used.
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MD-SR50H/50W/60E/60W —MEMO— – 38 –
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MD-SR50H/50W/60E/60W PARTS GUIDE MODEL MD-SR50H(BL) MD-SR50H(S) MD-SR50H(YR) MD-SR50W(BL) MD-SR50W(S) MD-SR60E(GJ) MD-SR60W(S) “HOW TO ORDER REPLACEMENT PARTS” To have your order filled promptly and correctly, please furnish the following information. 1. MODEL NUMBER 2. REF. No. 3. PART NO. 4. DESCRIPTION For U.S.A. only Contact your nearest SHARP Parts Distributor to order.
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MD-SR50H/50W/60E/60W NO.
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MD-SR50H/50W/60E/60W NO.
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MD-SR50H/50W/60E/60W NO.
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MD-SR50H/50W/60E/60W NO. 236 237 240 241 242 601 602 603 605 PRICE RANK PARTS CODE MSPRP0032AWFW LHLDZ3012AWM1 MSPRP0034AWFW PCUSZ0021AWZZ PSPAP0002AW00 LX-BZ1008AFFC LX-BZ0048AWFN LX-CZ0107AFFF LX-BZ0805AFFN J J J J J J J J J DESCRIPTION NO.
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MD-SR50H/50W/60E/60W 502x2 508x2 507 A 3 8 8-1 8-2 (PH901) 501 B 16 17 511 21 23 512 C 8-3 (SW902) 505x3 504 503 15 M901 2 509 D M903 504 12 19 11 1 510 7 24 503x2 506 13 E 6 503 25 F M902 22 14 5 G 20 9 26 H 18 1 2 3 4 Figure 5 MD MECHANISM EXPLODED VIEW –5– 5 6
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MD-SR50H/50W/60E/60W MD MECHANISM A 242 204 220 225x2 B 237 201 601 x2 220 221 222 224 219 C 223 601x2 202 233 234 214 207 230 210 D 208 216 227 215 231 601 228 229 PWB-A E 232 205 213 217 F 206 236 605x4 218 603 212 G 601x2 203 601 241 240 226 211 241 602 235 601x2 601 H 1 2 3 4 Figure 6 CABINET EXPLODED VIEW –6– 209 5 6
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MD-SR50H/50W/60E/60W PACKING METHOD (MD-SR50H FOR U.K./SR60E ONLY) Setting position of switches and knobs 1 2 3 4 5 5 6 7 8 9 10 UNIT HOLD OFF Remote Control HOLD CANCEL RPHOH0005AWZZ RPHOH0001AWZZ RRMCW0002AWZZ UBAGC0003AWZZ TINSE0295AWZZ TINSE0296AWZZ SPAKZ0599AWZZ RADPA8046AWZZ QCNWG0382AFZZ SPAKA0237AWZZ TINSE0289AWZZ Earphones [SR60E Only] Headphones [SR50H for U.K.] Remote Control [SR60E Only] Battery Case [SR60E] Quick Guide [SR60E] Quick Guide [SR50H for U.K.
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MD-SR50H/50W/60E/60W —MEMO— –8–
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MD-SR50H/50W/60E/60W COPYRIGHT © 2000 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in 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.