MDS-JE440 SERVICE MANUAL US Model Canadian Model AEP Model UK Model E Model Australian Model US and foreign patents licensed form Dolby Laboratories Licensing Corporation. Model Name Using Similar Mechanism NEW MD Mechanism Type MDM-7A Optical Pick-up Type KMS-260B/J1N SPECIFICATIONS System MiniDisc digital audio system Inputs Disc Laser MiniDisc Semiconductor laser (λ = 780 nm) Emission duration: continuous MAX 44.
General Supplied accessories Power requirements • Audio connecting cords (2) • Optical cable (1) • Remote commander (remote) (1) • R6 (size-AA) batteries (2) Where purchas ed US, Canadian Power requir ements 120 V AC, 60 Hz AEP, UK, CIS 220 – 230 V AC, 50/60 Hz Australian 240 V AC, 50/60 Hz US and foreign patents licensed from Dolby Laboratories.
1. While pressing the AMS knob and x button, connect the power plug to the outlet, and release the AMS knob and x button. When the test mode is set, “[Check]” will be displayed. 2. Rotate the AMS knob and when “[Service]” is displayed, press the YES button. 3. Rotate the AMS knob and display “Err Display”. 4. Pressing the YES button sets the error history mode and displays “op rec tm”. 5. Select the contents to be displayed or executed using the AMS knob. 6.
Table of Error Codes Error Code TABLE OF CONTENTS Description 1. SERVICING NOTES .............................................
SECTION 1 SERVICE NOTES SAFETY CHECK-OUT (US model only) After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.
JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-196-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows.
Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD BOARD) ARE REPLACED The Iop value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD board), record the Iop value on the optical pick-up according to the following procedure. Record Precedure: 1.
CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”. • 5-6-2. Laser power check (see page 23) • 5-6-3. Iop Compare (see page 23) • 5-6-4. Auto Check (see page 24) Note: The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.
RETRY CAUSE DISPLAY MODE • In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the “track mode” for obtaining track information will be set. This is useful for locating the faulty part of the unit. • The following will be displayed : During recording and stop : Retry cause, number of retries, and number of retry errors. During playback : Information such as type of disc played, part played, copyright.
Reading the Track Mode Display Higher Bits Hexadecimal 8 Bit Binary 4 2 1 Lower Bits 8 4 2 1 b7 b6 b5 b4 b3 b2 b1 b0 Details Hexadecimal When 0 When 1 0 0 0 0 0 0 0 1 01 Emphasis OFF Emphasis ON 0 0 0 0 0 0 1 0 02 Monaural Stereo 0 0 0 0 0 1 0 0 04 This is 2-bit display. Normally 01. 0 0 0 0 1 0 0 0 08 01:Normal audio.
SECTION 2 GENERAL 12 3 4 5 6 7 8 9 0 qa qs qd w; ql qkqj qhqgqf 1 STANDBY indicator qa z REC button 2 @/1 (power) button qs REC MODE button 3 SCROLL button qd INPUT button 4 MDLP indicator qf LEVEL/DISPLAY/CHAR button 5 A EJECT button qg J button 6 MENU/NO button qh REPEAT button 7 YES button qj PLAY MODE button 8 H button qk j button 9 S button ql l AMS L /PUSH ENTER button q; s button w; CLEAR button 11
SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. UPPER CASE (408226) 2 case (408226) 1 two screws (CASE 3 TP2) 1 two screws (CASE 3 TP2) 3-2.
3-3. MAIN BOARD 3 connector (CN902) 2 wire (flat type) (23core) (CN400) 6 screw 1 wire (flat type) (27core) (BVTP3 × 8) (CN1) 5 screw (BVTP3 × 8) 7 MAIN board 4 two screws (BVTP3 × 8) 3-4.
3-5. MECHANISM DECK SECTION (MDM-7A) 2 four step screws (BVTTWH M3) 4 mechanism deck 1 harness 3 3-6.
SECTION 4 TEST MODE 4-1. PRECAUTIONS FOR USE OF TEST MODE • As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it. Even if the A EJECT button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will not stop rotating. Therefore, it will be ejected while rotating.
4-5. SELECTING THE TEST MODE There are 25 types of test modes as shown below. The groups can be switched by rotating the AMS knob. After selecting the group to be used, press the YES button. After setting a certain group, rotating the AMS knob switches between these modes. Refer to “Group” in the table for details selected. All adjustments and checks during servicing can be performed in the test mode in the Service group. NOTE: Do not use the test mode in the [Develop] group.
4-5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode 1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.) 2 Rotate the AMS knob and display “CPLAY1 MODE”(C34). 3 Press the YES button to change the display to “CPLAY1 MID”. 4 When access completes, the display changes to “C = AD = ”. Note : The numbers “ ” displayed show you error rates and ADER. 2.
4-6. FUNCTIONS OF OTHER BUTTONS Contents Function G Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. x Stops continuous playback and continuous recording. M The sled moves to the outer circumference only when this is pressed. m The sled moves to the inner circumference only when this is pressed. REC MODE Switches between the pit and groove modes when pressed.
4-8. MEANINGS OF OTHER DISPLAYS Contents Display When Lit When Off G Servo ON Servo OFF X Tracking servo OFF Tracking servo ON REC Recording mode ON Recording mode OFF SYNC CLV low speed mode CLV normal mode L.
SECTION 5 ELECTRICAL ADJUSTMENTS 5-1. PARTS REPLACEMENT AND ADJUSTMENT If malfunctions caused by Optical pick-up such as sound skipping are suspected, follow the following check. Check before replacement Start 5-6-2. Laser Power Check (See page 23) NG OK 5-6-3. Iop Compare (See page 23) NG OK 5-6-4. Auto Check (See page 24) OK Other faults are suspected. Check the threading mechanism, etc.
Adjustment flow • Abbreviation OP: Optical pick-up Start Replace IC195 YES After turning off and then on the power, initialize the EEPROM For details, refer to 4-11. WHEN MEMORY NG IS DISPLAYED (See page 19) NO Replace OP or IO195 YES 5-7. INITIAL SETTING OF ADJUSTMENT VALUE (See page 26) YES 5-9. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT (See page 26) NO Replace IC101, IC195, or D101 NO Replace OP, IC190, or IC195 YES 5-10.
5-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight. 5-3. PRECAUTIONS FOR USE OF OPTICAL PICKUP (KMS-260B) As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder.
5-5. USING THE CONTINUOUSLY RECORDED DISC * This disc is used in focus bias adjustment and error rate check. The following describes how to create a continuous recording disc. 1. Insert a disc (blank disc) commercially available. 2. Rotate the AMS knob and display “CREC1 MODE”. 3. Press the YES button again to display “CREC1 MID”. Display “CREC (0300)” and start to recording. 4. Complete recording within 5 minutes. 5. Press the MENU/NO button and stop recording . 6.
5-6-4. Auto Check This test mode performs C-REC and C-PLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform Auto Check after the laser power check and Iop compare. Procedure 1. Press the YES button. If “LDPWR minicheck” is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1. 2.
16. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the AMS knob. (Traverse Waveform) A VC B Specified value : Below 10% offset value Offset value (%) = IA – BI X 100 2 (A + B) 17. Press the YES button and display “EF CD CHECK”. 18. Press the A button and remove the check disc (MD) TDYS-1. Note 1 : MO reading data will be erased during if a recorded disc is used in this adjustment.
5-7. INITIAL SETTING OF ADJUSTMENT VALUE 5-9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT Note: Mode which sets the adjustment results recorded in the non-volatile memory to the initial setting value. However the results of the temperature compensation offset adjustment will not change to the initial setting value. If initial setting is performed, perform all adjustments again excluding the temperature compensation offset adjustment. For details of the initial setting, refer to “5-4.
7. Then, rotate the AMS knob and display “LDPWR CHECK”. 8. Press the YES button once and display “LD 0.9 mW $ ”. Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the YES button once more and display “LD 7.0 mW $ ”. Check that the reading the laser power meter and digital volt meter satisfy the specified value. Note down the digital voltmeter reading value. 5-12. TRAVERSE ADJUSTMENT Connection : Oscilloscope BD board CN105 pin 4 (TE) CN105 pin 6 (VC) V : 0.
11. Rotate the AMS knob until the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Traverse Waveform) A VC B Specification A = B 12. Press the YES button, and save the adjustment results in the non-volatile memory. (“EFB = SAVE” will be displayed for a moment.) Next “EF MO ADJUS” is displayed. The disc stops rotating automatically. 13.
5-14. ERROR RATE CHECK 5-14-1. CD Error Rate Check Checking Procedure : 1. Load a check disc (MD) TDYS-1. 2. Rotate the AMS knob and display “CPLAY1 MODE”. 3. Press the YES button twice and display “CPLAY1 MID”. 4. The display changes to “C1 = AD = ”. 5. Check that the C1 error rate is below 20. 6. Press the MENU/NO button, stop playback, press the A button, and remove the test disc. 5-14-2. MO Error Rate Check Checking Procedure : 1. Load a continuously recorded test disc (MDW-74/GA-1). (Refer to “5-5.
5-17. ADJUSTING POINTS AND CONNECTING POINTS [BD BOARD] (SIDE A) CN101 D101 [BD BOARD] (SIDE B) IC101 CN105 1 IC102 7 * NOTE IC151 IC190 IC195 23 1 27 CN103 1 CN102 NOTE:It is useful to use the jig. for checking the waveform. (Refer to Servicing Note on page 6.
SECTION 6 DIAGRAMS 6-1. CIRCUIT BOARDS LOCATION THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) PT board • Indication of transistor B C E These are omitted. For schematic diagrams. VOL-SEL board (SP, MY model) Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
MDS-JE440 DIGITAL SIGNAL PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER IC151 (1/2) 15 TX 60 FILTER SCTX 59 62 61 40 AGCI RF AGC & EQ B.P.F.
MDS-JE440 – MAIN SECTION – A/D, D/A CONVERTER IC500 • SIGNAL PATH : PLAY (ANALOG OUT) : REC (ANALOG IN) J150 ADDT A 13 HIGH-PASS FILTER, DIGITAL ATTENUATOR SDTO (Page 32) A/D CONVERTER BLOCK AINL SUBTRACKTION AINR AUDIO INTERFACE CONTROLLER DADT, BCK, LRCK B DADT 14 BCK (Page 32) 12 LRCK SWDT, SCLK D 11 SWDT SCLK AOUTL– D/A CONVERTER BLOCK DIGITAL ATTENUATOR, SOFT MUTE SDTI BICK AOUTR+ AOUTR– LRCK CDTI 15 CCLK 16 CS 17 (Page 32) AOUTL+ CLOCK GENERATOR, CLOCK DIVIDER CONTROL R
• WAVEFORMS – BD Board – 1 IC101 ek (RF) – MAIN Board – – DISPLAY Board – 1 IC1 ws (XIN) 1 IC760 yg (OSCI) 1.6Vp-p 2.3Vp-p 1.3Vp-p 10 MHz 480 ns 2 IC101 ef (FE) 2 IC550 2, 3, 5 (Play mode) 2.6Vp-p 0.2Vp-p 45.158 MHz 3 IC101 wh (TE) 3 IC500 9 (XTI) (Play mode) 1.1Vp-p 1.6Vp-p 45.158 MHz 4 IC151 qh (OSCI) 4 IC500 qa (LRCK) 3.2Vp-p 3.1Vp-p 44.1 kHz 45.158 MHz 5 IC151 wj (LRCK) 5 IC500 qs (BICK) 3.2Vp-p 44.1 kHz 3.2Vp-p 2.8224 MHz 6 IC151 wk (XBCK) 3.8Vp-p 2.
MDS-JE440 6-3. PRINTED WIRING BOARD – BD SECTION – • Semiconductor • Semiconductor Location Location Ref. No. Location Ref. No. Location Ref. No.
MDS-JE440 6-4. SCHEMATIC DIAGRAM – BD SECTION (1/2) – • See page 34 for Waveforms. • See page 46 for IC Block Diagrams. • See page 48 for IC Pin Functions. • See page 35 for Printed Wiring Board.
MDS-JE440 6-5. SCHEMATIC DIAGRAM – BD SECTION (2/2) – • See page 34 for Waveforms. • See page 46 for IC Block Diagrams. • See page 49 for IC Pin Functions. • See page 35 for Printed Wiring Board.
MDS-JE440 6-6. PRINTED WIRING BOARD – MAIN SECTION (SIDE A) – • Semiconductor Location Ref. No. Location Ref. No.
MDS-JE440 6-7. PRINTED WIRING BOARD – MAIN SECTION (SIDE B) – • Semiconductor Location Ref. No. Location Ref. No. Location Ref. No.
MDS-JE440 6-8. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) – • See page 34 for Waveforms. • See page 52 for IC Pin Functions.
MDS-JE440 6-9. SCHEMATIC DIAGRAM – MAIN SECTION (2/3) – • See page 34 for Waveforms. • See page 47 for IC Block Diagrams.
MDS-JE440 6-10. SCHEMATIC DIAGRAM – MAIN SECTION (3/3) – • See page 47 for IC Block Diagrams.
MDS-JE440 6-11.
MDS-JE440 6-12.
MDS-JE440 6-13. SCHEMATIC DIAGRAM – DISPLAY SECTION – • See page 34 for Waveforms.
100 99 98 97 96 95 94 93 DCHG APC ADFG F0CNT XLRF CKRF DTRF APCREF LDDR TRDR TFDR DVDD FFDR FRDR FS4 SRDR SFDR SPRD SPFD TEST0 TEST1 TEST2 DVSS EFMO TEST3 IC151 CXD2662R (BD BOARD) 6-14.
IC400 LA5643 (MAIN BOARD) + VREF2 VREF1 VREF3 + DELAY + + - + - + RESET CIRCUIT DELAY 1 2 4 3 5 6 8 9 7 10 11 12 13 IC440 LB1641 (MAIN BOARD) T.S.D O.C.P MOTOR DRIVE MOTOR DRIVE 1 2 3 4 5 6 7 8 9 10 GND MOTOR DRIVE NOISE FILTER CLAMP FWD.IN REV.
6-15. IC PIN FUNCTIONS • IC101 CXA2523AR RF Amplifier (BD BOARD) Pin No. Pin Name Function I I I-V converted RF signal I input 2 J I I-V converted RF signal J input 3 VC O Middle point voltage (+1.
• IC151 CXD2662R Digital Signal Processor, Digital Servo Signal Processor (BD BOARD) Pin No.
Pin No.
Pin No. Pin Name I/O Function 86 TFDR O Tracking servo drive PWM output (+) 87 DVDD — +3V power supply (Digital) 88 FFDR O Focus servo drive PWM output (+) 89 FRDR O Focus servo drive PWM output (–) 90 FS4 O 176.
• IC1 M30805SGP SYSTEM CONTROL (MAIN BOARD) Pin No. I/O Function 1 DATA(FL) O 2 CLK(FL) O Serial clock signal output to the display driver. L: Active 3 A1-IN I A1 Control input. (Fixed at L) 4 SIRCS I Remote control input. 5 to 7 52 Pin Name Serial data signal output to the display driver. NC — 8 MUTE O Not used. Line out muting output. L: Mute 9 AD/DA RESET O Reset signal output to the AK4524. L: Active 10 AD/DA LATCH O Latch signal output to the AK4524.
Pin No. Pin Name 55 HLDA/ALE 56 MNT2 (XBUSY) 57 VSS 58 (MNT1) SHCK 59 VCC 60 61 I/O Function O Microprocessor mode output. (Not used.) I In the state of executive command from the CXD2662R — I Ground. Track jump signal input from the CXD2662R — Power supply. (+3.3V) EEP-WP O EEP-ROM write protect signal output. L: write possibility SDA I/O Data signal input/output pin with the EEP-ROM. 62 BUS CLK O Not used. 63 OE O Read signal output. 64 BHE CASH O Not used.
SECTION 7 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may have some differences from the original one. • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. • The mechanical parts with no reference number in the exploded views are not supplied. • • Hardware (# mark) list and accessories and packing materials are given in the last of this parts list.
7-2. FRONT PANEL SECTION 57 62 57 57 64 63 60 58 FL771 57 not supplied 57 65 61 57 56 55 51 53 54 not supplied 59 52 Ref. No. 51 Part No. Description Remarks 51 52 53 54 X-4952-921-1 PANEL ASSY, FRONT (AEP,UK,CIS,SP,MY,HK,AUS) X-4952-922-1 PANEL ASSY, FRONT (US,CND) A-4672-932-A KNOB (AMS) ASSY 3-354-981-11 SPRING (SUS), RING 4-228-622-01 WINDOW (FL) 55 56 57 58 59 4-228-629-01 4-228-630-01 4-951-620-01 4-228-625-01 4-977-593-11 Ref. No. Part No.
7-3. MECHANISM SECTION-1 (MDM-7A) 212 213 211 214 210 215 209 216 205 not supplied 217 204 208 219 203 205 not supplied 202 218 206 207 220 202 201 Ref. No. Part No. Description * 201 202 203 204 205 4-996-267-01 4-908-618-21 4-227-007-01 4-227-025-01 3-372-761-01 BASE (BU-D) SCREW (+BTP) (2X6) GEAR (SB) BELT (LOADING) SCREW (M1.
7-4. MECHANISM SECTION-2 (MDM-7A) 259 HR901 258 260 256 264 265 257 #3 262 #3 255 259 262 254 253 266 252 253 S102 252 263 M101 267 268 261 253 M102 253 M103 251 252 The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No. Description 251 252 253 254 255 A-4725-054-A 4-908-618-21 3-372-761-01 4-226-993-01 4-227-014-01 BD BOARD,COMPLETE SCREW (+BTP) (2X6) SCREW (M1.
SECTION 8 ELECTRICAL PARTS LIST BD NOTE: Ref. No. Part No. Description • Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. • -XX, -X mean standardized parts, so they may have some difference from the original one. • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.
BD Ref. No. IC153 IC171 IC181 IC190 IC195 JW201 JW202 JW203 JW903 JW904 Part No. Description Part No. Description 8-759-671-27 8-759-096-87 8-759-481-17 8-759-460-72 8-759-640-41 IC MSM51V4400E-70TS-K IC TC7WU04FU(TE12R) IC MC74ACT08DTR2 IC BA033FP-E2 IC BR24C08F-E2 R111 R112 R113 R114 R115 1-216-833-91 1-216-829-11 1-216-833-91 1-216-827-11 1-216-833-91 RES-CHIP METAL CHIP RES-CHIP METAL CHIP RES-CHIP 10K 4.7K 10K 3.
BD Ref. No. DISPLAY Part No.
MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description (AEP,UK,CIS,HK,AUS) C410 C411 C412 C413 C431 1-162-964-11 1-164-156-11 1-126-963-11 1-162-964-11 1-104-663-11 CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP ELECT 0.001uF 0.1uF 4.7uF 0.001uF 33uF 20% 10% 20% 50V 25V 50V 50V 25V C443 C447 C461 C471 C476 1-162-970-11 1-126-933-11 1-126-939-11 1-126-935-11 1-126-935-11 CERAMIC CHIP ELECT ELECT ELECT ELECT 0.
MAIN Ref. No. Part No. Description Part No. Description D432 D461 D462 D471 D472 8-719-016-74 8-719-200-82 8-719-200-82 8-719-200-82 8-719-200-82 DIODE 1SS352-TPH3 DIODE 11ES2-TB5 DIODE 11ES2-TB5 DIODE 11ES2-TB5 DIODE 11ES2-TB5 Remarks Ref. No.
MAIN Remarks Ref. No. Part No. PT VOL-SEL Ref. No. Part No. Description 0 R301 0 R306 R356 R357 R380 1-219-786-11 1-219-786-11 1-216-815-11 1-216-822-11 1-216-845-11 FUSIBLE FUSIBLE METAL CHIP METAL CHIP METAL CHIP 22 22 330 1.
MDS-JE440 Ref. No. Part No. Description Remarks Ref. No. Part No.
