Sharp MD-MT20 Service Manual Download

Page: 36 / 52

MD-MT20/20C/20W

– 36 –

WAVEFORMS OF MD CIRCUIT

NORM:200kS / s

1994 / 12 / 15 22:54:19

=Filter=

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.000V

Main : 10K
Zoom : 10K

CH3 : 0.00V
CH4 : 0.00V

=Trigger=

Mode : NORMAL
Type : EDGE CH4
Detay : 0.0ns
Hold OFF : MINIMUM

TP208

(FEOUT)

CK204

(FOK)

TP122

(F+)

CK205

(SENSE)

Stopped

CH1=1mV

DC 10:1

CH3=5V

DC 10:1

CH4=2V

DC 10:1

(50ms/div)

50ms/div

CH2=500mV

DC 10:1

NORM:100MS / s

1994 / 12 / 16 00:24:17

=Filter=

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.00V

Main : 5K
Zoom : 5K

CH3 : 0.00V
CH4 : 0.00V

=Trigger=

Mode : AUTO
Type : EDGE CH3
Detay : 0.0ns
Hold OFF : MINIMUM

SDTi

MCLK

SCLK

LRCK

Stopped

CH1=2V

DC 10:1

CH3=2V

DC 10:1

CH4=2V

DC 10:1

(50us/div)

50us/div

CH2=2V

DC 10:1

ENV

1994 / 12 / 16 01:03:40

=Filter=

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.00V

Main : 10K
Zoom : 10K

CH3 : 0.000V
CH4 : 0.00V

=Trigger=

Mode : NORMAL
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM

TP201

(EFM)

TP210

(TEOUT)

TP209

(TOTAL)

Stopped

CH1=1V

DC 10:1

CH3=500mV

DC 10:1

(2ms/div)

2ms/div

CH2=2V

DC 10:1

ENV

1994 / 12 / 15 23:31:21

=Filter=

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.00V

Main : 10K
Zoom : 10K

CH3 : 0.00V
CH4 : 0.00V

=Trigger=

Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

SPDRR

TP601

(VM)

Stopped

CH1=2V

DC 10:1

(50ms/div)

50ms/div

CH2=2V

DC 10:1

FULL

20MHz

Bandwidth

Smooth

OFF

1994 / 12 / 18 09:26:46

=Filter=

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.00V

Main : 10K
Zoom : 10K

CH3 : 0.00V
CH4 : 0.00V

=Trigger=

Mode : AUTO
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM

TP208

(FEOUT)

TP210

(TEOUT)

TP656

(SL+)

TP657

(SL-)

Stopped

CH1=2V

DC 10:1

CH3=2V

DC 10:1

CH4=2V

DC 10:1

(1s/div)

1s/div

CH2=2V

DC 10:1

ENV

1994 / 12 / 16 01:23:16

=Filter=

=Tracel= P-P 1.280V

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.000V
CH2 : 0.00V

Main : 1K
Zoom : 1K

CH3 : 0.00V
CH4 : 0.00V

=Trigger=

Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

TP201

(EFM)

Stopped

CH1=2V

DC 10:1

(500ms/div)

500ms/div

MORM:200MS/s

1994 / 12 / 15 08:57:26

=Filter=

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.00V

Main : 10K
Zoom : 10K

CH3 : 0.000V
CH4 : 0.0V

=Trigger=

Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

TP201

(EFM)

TP210

(TEOUT)

TP209

(TOTAL)

Stopped

CH1=2V

DC 10:1

(2ms/div)

2ms/div

CH2=2V

DC 10:1

ENV

CH3=500mV

DC 10:1

1994 / 12 / 15 09:58:45

=Filter=

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.00V

Main : 10K
Zoom : 10K

CH3 : 0.00V
CH4 : 0.00V

=Trigger=

Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

TP208

(FEOUT)

TP210

(TEOUT

)

SPDRR

TP601

(VM)

Stopped

CH1=2V

DC 10:1

CH3=2V

DC 10:1

CH4=2V

DC 10:1

(1s/div)

1s/div

CH2=2V

DC 10:1

ENV

1994 / 12 / 15 08:39:46

=Filter=

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.00V

Main : 10K
Zoom : 10K

CH3 : 0.00V
CH4 : 0.0V

=Trigger=

Mode : AUTO
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

TP210

(TEOUT)

TP656

(SL+)

TP657

(SL-)

Stopped

CH1=2V

DC 10:1

CH3=2V

DC 10:1

(1s/div)

1s/div

CH2=2V

DC 10:1

NORM:1kS/s

1994 / 12 / 15 21:54:52

=Filter=

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.00V
CH2 : 0.00V

Main : 10K
Zoom : 10K

CH3 : 0.00V
CH4 : 0.00V

=Trigger=

Mode : NORMAL
Type : EDGE CH2
Detay : 0.0ns
Hold OFF : MINIMUM

TP201

(EFM)

TP210

(TEOUT)

TP121

(T-)

Stopped

CH1=2V

DC 10:1

CH3=1V

DC 10:1

CH4=1V

DC 10:1

(500us/div)

500us/div

CH2=2V

DC 10:1

ENV

For TP208, TP209, and TP210, use the specific LPF, and
observe the waveform.

When watching the EEM monitor (TP201)
Set MSL from 00

to 80

with EEPROM control setting. After

completion restore 00

1994 / 12 / 15 09:10:03

=Filter=

=Offset=

=Record Length=

Smoothiing : OFF
BW : FULL

CH1 : 0.000V
CH2 : 0.00V

Main : 4K
Zoom : 4K

CH3 : 0.000V
CH4 : 0.0V

=Trigger=

Mode : NORMAL
Type : EDGE CH1
Detay : 0.0ns
Hold OFF : MINIMUM

CK105

(HPFO)

CK108
(WBO)

Stopped

CH1=500mV

DC 10:1

(20us/div)

20us/div

CH2=2V

DC 10:1

ENV

1000P

10K

Measurement

Summary of Contents for MD-MT20

Page 1: ...BOARD 31 WAVEFORMS OF MD CIRCUIT 36 TROUBLE SHOOTING 37 FUNCTION TABLE OF IC 40 CIRCUIT DESCRIPTION 42 PARTS GUIDE EXPLODED VIEW PACKING OF THE SET MD MT20 ONLY SERVICE MANUAL SHARP CORPORATION No S6943MDMT20 This document has been published to be used for after sales service only The contents are subject to change without notice MD MT20 S MD MT20C S MD MT20W BL MD MT20W GL MD MT20W S In the inter...

Page 2: ...erstralning när denna del är öppnad och spärren är urkopplad Betrakta ej strälen Precaution to be taken when replacing and servicing the laser pickup The following precautions must be observed during servicing to protect your eyes against exposure to the laser Warning of possible eye damage when repairing If the AC adaptor or batteries are connected when the top houising disc cover of the unit is ...

Page 3: ...Coding 24 bit com puted type Recording method Magnetic modulation overwrite method Sampling frequency 44 1 kHz 32 kHz and 48 kHz signals are converted to 44 1 kHz and then recorded Wow and flutter General Power source DC 2 4V Rechargeable Nickel Metal Hydride battery AD T20BT x 1 DC 5V AC adaptor AC 120V 60 Hz DC 3 0V Commercially available AA size LR6 alkaline battery x 2 DC 4 5V Separately avail...

Page 4: ... Button 23 Volume Down Cursor Charge Button 24 Record Track Mark Button 25 Fast Reverse Recording Level Down Name Select Button 26 Stop Power Off Button 27 Play Pause Button 28 Fast Forward Recording Level Up Name Select Button 29 Open Lever 30 Remote Control Earphones Socket 31 Optical Line Input Socket 32 Microphone Input Socket 33 Hold Switch 34 5V DC Input Socket 35 Battery Cover 33 34 35 1 2 ...

Page 5: ... 60 Hz Insert securely all the way in To the DC IN 5V socket AC 120V 60 Hz Insert securely all the way in To the DC IN 5V jack For MD MT20 20C For MD MT20W RECORDING USING THE OPTICAL DIGITAL CABLE This is the method used for recording digi tal signals from CDs or MDs exactly as they are stored on the original Compared to re cordings made from analogue inputs digi tal recordings have extremely hig...

Page 6: ...ol place to a warm place When the unit has condensation inside the disc signals cannot be read and the unit may not function properly If this happens remove the disc The condensation should evaporate in approximately 1 hour The unit will then function properly Many potential problems can be resolved by the owner without calling a service techni cian If something seems to be wrong with this product...

Page 7: ...sc is scratched Poor connection of the digital cable The disc is out of recording space The unit is in the hold mode The EJECT lever was moved during recording or editing A disc has not been loaded You tried to record on a playback only disc Improper power is being supplied The MD is write protected You tried to record without loading an MD A playback only MD was loaded and the REC button was pres...

Page 8: ...Lado de reproducción Recording side Lado de grabación DIGITAL OUT AUDIO OUT 1 2 4 3 5 5 1 Check the supplied accessories Compruebe los accesorios suministrados 2 Power source Alimentación PORTABLE MINIDISC RECORDER Quick Guide Guía rápida MD MT20 Rechargeable battery power Alimentación de la batería recargable AC 120V 60Hz 120V CA 60Hz Alkaline battery power Alimentación de la pila alcalina AC pow...

Page 9: ...hones jack on the remote control unit 1 Plug the remote control unit into the jack on the main unit Push the plug all the way in 2 The power will be turned on automatically and play back will start from the first track Auto play function La alimentación se conectará automáticamente y la reproducción empezará desde la primera pista Función de reproducción automática To interrupt playback Para inter...

Page 10: ... may result in malfunction 3 When repairing pay utmost attention to static electricity of IC REMOVAL PROCEDURE STEP FIGURE Figu re 10 1 Figure 10 2 Figure 10 3 Caution Carefully handle the main PWB and flexible PWB After removing the flexible PWB 1 for the optical pickup from the connector do not touch directly the front end of flexible PWB with your hand so as to prevent damage of optical pickup ...

Page 11: ... head up down motor lead wire 2 Remove the screw B2 x 1 pc and remove the flexible PWB 3 Remove the screw B3 x 1 pc and remove the head up down motor Note Take care so that the motor gear is not damaged If the gear is damaged noise is caused How to remove the sled motor See Fig 11 3 1 Remove the stop washer C1 x 1 pc and remove the drive gear C2 x 1 pc 2 Remove the screws C3 x 2 pcs and remove the...

Page 12: ... address is performed 1 line 10 lines or 384 lines manual jump is performed C1 error rate display pit section ADIP error rate display groove section The temperature correction is performed only when servo start is performed but the posture correction is not performed during continuous playback 4 TEST REC Mode Continuous record from the specified address is performed Change of record laser output s...

Page 13: ... changes continuously one cycle being 100 ms When the BASS button is pressed in the continuous playback mode the number of jump lines changes as follows 1 10 384 1 After the number of jump lines is indicated for one second the address indication is restored T R _ When the SKIP UP button is pressed in the continuous playback mode the specified number of lines is jumped in the FWD direction When the...

Page 14: ...in the memory When the DISP button is pressed while the error data indication menu appears the error data is initialized C L E A R _ Error Code Explanation of error history code 12h RF side FG TG and TCRS adjustment termination failure 13h Adjustment servo retraction excessive retrial 16h C IN detection time over 17h A B E F and TCRSO offset measurement value out of tolerable range 21h Focus retra...

Page 15: ... Set the TEST mode Set TEST 1 0 01 and turn on power or set PLAY ON in standby state 2 Start the EEPROM mode Temp menu Key operation in order of BASS SKIP DOWN x 2 times PLAY PLAY in the test mode STOP state TM is displayed Temperature code Temperature reference 3 Once press SKIP UP and determine the displayed microcomputer TEMP input AD value TPin is displayed TEMP input AD value 4 At the ambient...

Page 16: ...C T 1 _ 1 1 H C T 2 _ 7 F H C T 3 _ 3 0 H R C 0 _ C 0 H R C 1 _ F E H S Y C _ A 6 H P W L _ 0 3 H D R 1 _ 9 2 H D R 2 _ C 8 H I N 1 _ D 3 H I N 2 _ 6 4 H I N 3 _ D 2 H I N H _ 6 4 H D R H _ C 8 H P L E _ 1 B H R C E _ 4 2 H E L T _ 7 6 H S L T _ 4 3 H S P M _ 0 0 H M S L _ 0 0 H U S 0 _ 0 0 H U S 1 _ 0 0 H U S 2 _ 0 0 H Item display Set values F G _ _ B 0 H F F 1 _ 7 0 H F F 2 _ E 8 H F Z H _ E D ...

Page 17: ... M A N U 1 ATT manual adjustment menu M A N U 2 Error history display menu E D A T A Test mode normal playback menu N O R M A L Preautomatic Adjustment menu Preadjustment error adjustment value output During preadjustment adjustment Adjustment error Normal end Preadjustment normal end adjustment value output During ATT automatic adjustment PLAY PLAY A U T O 1 Preautomatic Adjustment A D J O K A D ...

Page 18: ...start address changes as follows when the DISP button is pressed 0 0 3 2 H initial value 0 3 C 0 H 0 7 0 0 H 0 8 A 0 H A d 0 0 3 2 A d 0 3 C 0 DISP DISP A d 0 7 0 0 DISP DISP A d 0 8 A 0 In the start address setting state the start address change digit changes when the BASS button is pressed 1st digit initial value 2nd digit 3rd digit A d 0 0 3 2 A d 0 0 3 2 MODE MODE A d 0 0 3 2 MODE In the conti...

Page 19: ... Q When the STOP button is pressed in specific menu the TEST MODE STOP state is set TEST mode normal playback menu Continuous playback Mode and address display PLAY N O R M A L Test Mode Normal Playback When the STOP button is pressed in specific menu the TEST MODE STOP state is set When the NORMAL mode is canceled the power is turned off Error history display menu Error history 0 display Error co...

Page 20: ...fic 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 The upper limit varies depending on the items When the MODE button is pressed in each state the set digit is changed Focus setting menu PLAY F o c ...

Page 21: ...h state the set digit is changed 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 the STOP button is pressed in specific menu the TEST MODE STOP state is set When the DIS...

Page 22: ...SKIP UP 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 When the MODE button is pressed in each state the set digit is changed Adjustment setting...

Page 23: ...the specific setting display state the setting change digit changes when the P MODE button is pressed 1st digit initial value 2nd digit P MODE 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 Control setting menu PLAY C T R L Control Setting C T 0 C T 1 SKIP UP SKI...

Page 24: ...TOP 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 setting display state the setting change digit changes when the P MODE button is pressed 1st digit initial value 2nd digit P MODE P MODE In the specific state the setting changes in the range of 0h to Fh when ...

Page 25: ...itor without such a symbol is microfarad As to electro lytic capacitor the expression capacitance withstand volt age is used CH TH RH UJ Temperature compensation ML Mylar type The indicated voltage in each section is the one measured by Digital 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 re...

Page 26: ...35 36 3 1 2 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 3 1 2 4 5 6 3 0 88V 2 5V 1 27V 0V 1 25V 1 25V 1 25V 1 25V 1 25V 1 3V 2 2V 2V 0V 0V 0V 0V 1V 0V 0V 0V 0V 0V 0V 0V 0V 0 49V 1 44V 1 13V 2 56V 0 6V 1V 1V 0 8V 0 8V 0 8V 0V 2 13V 1 4V 0 51V 0 51V 1 56V 1 1V 1 75V 2 57V 1 74V 1 61V 0V 1 93V 1V 0 91V 0V 0V 0V 0V 2V 0V 0V 0V 0V 0 14V 2V 0V 0 9V 0 9V 1 66V 1V 2V 0V 1V 1V 2V 0V 0V 0V 0V 0...

Page 27: ... JACK 4 5 5V 1 7 3 4V 2 35V LCD UNIT KEY OPERATION UNIT IC901 SPINDLE MOTOR DRIVER BA6966FV IC703 AUDIO AMP IR3R54N IC701 AUDIO AMP IR3R54N IC601 4CH PWM DRIVER MPC17A39 VM IC402 EEPROM S29L294A 4 5V VCC VS IC202 IX2567AF 4MBIT D RAM 2 5V 4 5V OPTICAL IN UNIT J701 OPTICAL IN J701 LINE IN J702 MIC IN READY FOR PLUG IN POWER 2 0V REGULATOR IC200 62FP2002 1 3 4 5 6 19 20 17 16 35 VCC VG 13 24 26 29 3...

Page 28: ...KO SLDRF SLDRR TRDRF TRDRR FODRR FODRF DCNT1 SPDRF SPDRR EFMO INNSW SPIN HDON RFLAT OPICGA LDON INPGCK INPGIN MCPGIN PBMUTE BEEP AUSCLK RCAULT RCPCNT VCCENDEC LDCNT1 LDCNT2 SYRS SYRD SYWR SYD7 SYD6 SYD5 SYD4 SYD3 SYD2 SYD1 SYD0 DINT CIN SENSE FOK SPDRR SPDRF SLDRR SLDRF TRDRR TRDRF FODRR FODRF XRT AUDATA AUSCLK RFLAT TEMP LDON LDVAR OPICGA _LCDRST PLVGIN PLVON SCKO P32 _DCEXT _ELON GND VCC D1 S G1...

Page 29: ...VCC2 7X BATON BATINCK PCNT2 TEMP PLVDCI PLVDRY RESET BATINCK BATON RCPCNT ELON PCNT2 DINT AUDATA PBAULT HREC HPLAY HSTOP VCC2 7 PCNT1 PLVDCI PLVDRY BCLK LRCK DAPON ADPON DIN DFCK ADDATA OPTCNT EMPH1 DADATA DCNT1 DISCPR SPIN X176KO RKEY EFMO INNSW PDCNT HDON LDVAR RFLAT OPICGA LDON INPGCK INPGIN MCPGIN EMPH0 PBMUTE BEEP AUSCLK RCAULT RCPCNT HKEY2 HKEY1 VCCENDEC VCCDRAM SENSE FOK XRT LDCNT1 LDCNT2 S...

Page 30: ...P764 TP763 CN701 9 8 7 6 5 4 3 2 1 TP782 TP777 R871 10K IC872 S80813LN 4 3 2 1 IC871 S8324A28 5 4 3 2 1 L871 47µH D812 SB10015C IC803 FDT439N CHARGING CIRCUIT TP809 R257 100K R458 56K R457 18K R456 8 2K R455 5 6K R453 18K R452 8 2K R451 5 6K TP460 CN451 9 8 7 6 5 4 3 2 1 TP453 TP452 TP451 TP461 TP454 TP455 TP456 TP457 TP458 TP459 TP462 TP463 J801 DC IN 3 2 1 TP802 TP801 L887 TIP IMPEDER L888 TIP I...

Page 31: ...HEAD FLEXIBLE PWB 18 MAGNETIC HEAD 24 MECHANISM FLEXIBLE PWB M902 SLED MOTOR M903 HEAD UP DOWN MOTOR PH901 PHOTO INTERRUPTER M901 SPINDLE MOTOR SW902 DISC PROTECT TO MAIN PWB P32 5 H CN601 TO MAIN PWB P32 3 C CN482 LCD Ass y 214 KEY SWITCH FLEXIBLE PWB Ass y 213 TO MAIN PWB P32 2 C CN451 CN101 TO MAIN PWB P32 4 H ...

Page 32: ... TP486 IC851 C832 C831 L602 C852 C828 TP660 IC821 C602 TP463 TP664 TP665 TP666 L603 C603 C482 C481 C824 C604 IC808 C829 R279 TP481 TP482 D822 L604 IC807 R831 R824 R265 R273 Q254 Q251 R263 C823 R277 C250 R264 R253 R252 R278 R276 R259 R260 Q253 R261 TP804 C253 Q255 R275 R266 R262 R254 R271 R274 R267 R255 C258 C256 IC805 C254 C255 R269 TP803 R804 TP483 TP454 R456 TP453 R457 TP451 R455 TP456 TP458 CN4...

Page 33: ...165 CK224 CK222 IC820 R105 C104 C201 R803 R407 R408 R404 R403 C103 C102 C820 IC200 C100 L100 R202 C202 C200 R806 R423 L206 L205 R462 R800 R802 XL201 D803 C211 C212 R222 L202 R808 L203 L209 L201 IC801 CK207 L204 R207 C209 R463 R801 R807 D461 R465 D802 C454 R464 R461 R809 D800 R871 C871 IC872 D801 IC802 Q461 IC702 C877 C866 R467 R460 C875 IC871 C841 C874 IC841 D871 F871 T0 5A L 63V C876 L871 1 2 3 6...

Page 34: ...765 C762 C508 SW401 EJECT C509 IC501 R765 R767 R500 R768 L719 C757 C756 IC703 R766 C507 R726 C726 R757 R756 C506 C505 Q721 C719 C758 R710 Q711 C725 R725 R720 R712 C760 C759 C715 R717 R719 R711 R754 C753 C754 R730 R753 C755 R723 C711 SW403 DISC LID OPEN C722 L702 C752 C721 C491 L454 L453 C712 R729 C751 R724 C720 C724 L712 L713 L703 C731 D494 R703 R727 L456 C703 R728 R492 C701 C702 R702 L704 R714 R7...

Page 35: ...01 TP702 TP711 TP713 TP712 TP714 TP091 TP086B TP078 TP707 TP708 TP500 TP087B TP088B TP087 TP085 TP079 TP090 TP075 TP088 TP083 TP084 TP709 TP074 TP070B TP089 TP072 TP070 TP067 TP071 TP073 TP724 TP722 TP729 TP721 TP723 TP725 TP721B TP726 TP704 TP703 TP064B TP705 TP077 TP068 TP066 TP062 TP064 TP061 TP728 TP727 TP063 TP065 TP076 TP093 TP092 TP082 TP086 TP080 TP069 L451 R715 R713 C713 AUDIO PWB A2 BOTT...

Page 36: ...CH1 0 000V CH2 0 00V Main 1K Zoom 1K CH3 0 00V CH4 0 00V Trigger Mode AUTO Type EDGE CH1 Detay 0 0ns Hold OFF MINIMUM T TP201 EFM Stopped CH1 2V DC 10 1 500ms div 500ms div 1 MORM 200MS s 9 1994 12 15 08 57 26 Filter Offset Record Length Smoothiing OFF BW FULL CH1 0 00V CH2 0 00V Main 10K Zoom 10K CH3 0 000V CH4 0 0V Trigger Mode NORMAL Type EDGE CH1 Detay 0 0ns Hold OFF MINIMUM T TP201 EFM TP210 ...

Page 37: ...tly 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 the power supply turned on when the remote control button or main unit button is pressed No Perform the check stated in item Power is not turned on when the PLAY button is pressed Perform the check stated in item Abnormal display No Yes Does the display operate normall...

Page 38: ...time display advance Yes Position check in INNER mode Check IC201 and IC202 connection line Is the lead in photointerrupter set to OFF when the optical pickup moves to the innermost periphery in NORMAL mode Is TP654 in H level Check the lead in photointerrupter mechanical flex PWB soldering and CN601 connection No Ia an attempt to repeat repeatedly the TOC part performed on the low reflection disc...

Page 39: ...01 Check whether disc is record inhibited No Does the RF waveform of TP201 appear when playback is Does level of pins 86 of IC401 and pin 17 of IC101 change depending on record and playback Is RF pattern output from IC201 pin 50 Yes No Check for soldering failure of IC201 No Check periphery of IC401 and IC101 Check whether there is any damage in IC101 periphery of laser diode Yes Check for defects...

Page 40: ...h output 33 PC1 _MCPGI Input Microphone plug insertion detection input 34 PC2 _INPGI Input Line digital plug insertion detection 35 PC3 INPGCK Input Line digital plug type detection 36 PC4 RCPCNT Input Output Record circuit power control output 37 PC5 TEST1 Input Test mode setting input 1 38 PC6 TEST0 Input Test mode setting input 0 39 PC7 JPNP Input Kana conversion Kana input existence nonexisten...

Page 41: ...ut Battery voltage detection input 80 AN1 PLVDCI Input DC jack voltage detection input 81 P42 TEMP Output Ambient temperature detection input 82 AN3 RKEY Input Remote control key operation detection input 83 AN4 HKEY1 Input Unit key operation detection input 1 84 AN5 HKEY2 Input Unit key operation detection input 2 85 AN6 CHGCNT Output Charging current control output 86 DA1 LDVAR Output P U laser ...

Page 42: ...ending on the battery condition The charging time may be more than five minutes depending on the initial battery condition If the battery voltage is below 2 0 V or over 3 75 V after two minutes the charging mode is cancelled When the battery voltage is over 2 0 V and less than 3 75 V after five minutes the main charging mode is selected Main charging The charging current is approx 375 mA The main ...

Page 43: ... the following charging voltage measurement mode 2 Pin 51 on IC401 Output H The output should be H while in the charging voltage measurement mode Since the charging voltage is measured at intervals of five minutes while in the charging mode the output should only be H about 500 msec every 5 minutes Power supply change When one of the power supplies is selected the port settings are as follows Pin ...

Page 44: ...MD MT20 20C 20W 44 MEMO ...

Page 45: ...mic type VCK Ceramic type VCT Semiconductor 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 indicati...

Page 46: ...500 RCILC0344AFZZ J AC 47 µH Choke L600 RCILC0331AFZZ J AC 2 2 µH Choke L601 604 RCILC0358AFZZ J AC 4 7 µH Choke L608 610 RCILC0358AFZZ J AC 4 7 µH Choke L702 704 RCILC0353AFZZ J AB Tip Solid Induction 100mA L711 714 RCILC0353AFZZ J AB Tip Solid Induction 100mA L719 VPBNNR47K0000 J AC 0 47 µH L751 752 RCILC0354AFZZ J AC 22 µH Choke L771 RCILC0359AFZZ J AC 100 µH Choke L821 RCILC0004AWZZ J AF 4 7 µ...

Page 47: ... 100 kohm 1 16W R267 VRS CY1JB753D J AA 75 kohms 1 16W R268 VRS CY1JB222J J AA 2 2 kohms 1 16W R269 270 VRS CY1JB101J J AA 100 ohm 1 16W R271 VRS CY1JB102J J AA 1 kohm 1 16W R273 VRS CY1JB563J J AA 56 kohms 1 16W R274 VRS CY1JB753D J AA 75 kohms 1 16W R275 VRS CY1JB563D J AA 56 kohms 1 16W R276 VRS CY1JB332D J AA 3 3 kohms 1 16W R277 VRS CY1JB393J J AA 39 kohms 1 16W R278 VRS CY1JB222J J AA 2 2 ko...

Page 48: ...er Lift 23 MSPRD1362AFFJ J AD Spring Lift Lever 24 RCILH0112AFZZ J AM Magnetic Head 501 LX BZ0804AFFF J AA Screw ø1 4 2 2mm 502 LX JZ0154AFZZ J AA Screw ø1 4 2 8mm 503 LX BZ0823AFZZ J AA Screw ø1 4 1 2mm 504 LX WZ9290AFZZ J AA Washer ø0 8 ø2 4 0 2mm 505 LX BZ0800AFZZ J AA Screw ø1 4 2 5mm 506 XSPSN14P01500 J AA Screw ø1 7 2 5mm 507 LX JZ0148AFZZ J AA Screw ø1 7 3mm 508 XWSSD14 05000 J AA Washer ø1...

Page 49: ...C Comparision MD MT20W for Taiwan Only TLABJ0009AWSA J AB Label SHARP Corpration Japan MD MT20W for Chile Peru Bolivia Only TLABJ0010AWZZ J AB Label Japan MD MT20W for Chile Peru Bolivia Only TLABN0088AWZZ J AB Label SER No Except for Taiwan of MD MT20W TLABN0092AWZZ J AB Label SER No MD MT20C 20W for New Zealand TLABN0092AW02 J AB Label SER No MD MT20W Except for Asia Middle and Near East Africa ...

Page 50: ... F G H 1 2 3 4 5 6 Figure 5 MD MECHANISM EXPLODED VIEW 5 M903 M902 M901 503x2 502x3 508x2 501x2 11 505 24 18 509 512 8 2 SW902 8 1 8 8 3 PH901 507 503 507 9 19 15 1 2 14 16 13 511 510 21 504 12 503 5 3 10 23 17 4 22 20 6 7 506 ...

Page 51: ...02 201 201 1 603x2 203 205 207 206 204 201 2 214 216x2 215 213 217 209 208 211 601 212 210 224 223 240 242 601 602 602 244 602x3 225 243 245 238 237 229x2 230 239 231 603x2 241 226 228 227 PWB A2 PWB A1 236 235 234 233 232 218 603x2 221 603x2 603x2 603 222 220 219 219 246 MD MT20W Only MD MT20W Only 247 ...

Page 52: ... system or transmitted in any from or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher Battery Carrying Case Quick Guide Optical Digital Cable Operation Manual Headphones Caution Carying Case TLABN0088AWZZ SER No Label 1 3 2 SPAKZ0522AWZZ Protect Cushion SPAKZ0518AWZZ Protect Sheet TLABR1051AWZZ Bar Code Label TLABN0092AWZZ SE...

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