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MZ-E44/E45
SERVICE MANUAL
US Model
AEP Model
Ver 1.1 1999.01
UK Model
Australian Model
Tourist Model
MZ-E44
E Model
MZ-E44/E45
Photo : MZ-E44 (SILVER) Photo : MZ-E45 (GRAY)
US and foreign patents licensed from Dolby Model Name Using Similar Mechanism NEW
Laboratories Licensing Corporation
MD Mechanism Type MT-MZE44-140
Optical Pick-up Mechanism Type ODX-1A/1B
SPECIFICATIONS
MD Section General
Audio playing system Power requirements
Minidisc digital audio system Rechageable battery (supplied)
La
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TABLE OF CONTENTS 5. ELECTRICAL ADJUSTMENTS ............................ 10 Specifications ........................................................................... 1 6. DIAGRAMS 1. SERVICING NOTE ....................................................... 2 6-1. Explanation of IC Terminals ..................................... 13 6-2. Block Diagram .......................................................... 15 2. GENERAL 6-3. Printed Wiring Boards .............................................. 18
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SECTION 2 GENERAL LOCATION AND FUNCTION OF CONTROLS Main Unit 6 5 7 4 8 9 3 !¼ 2 1 1 MD operate buttons 5 OPERA TE lamp Ó • + (PLAY • FF ) 6 Battery compartment = (REW ) 7 External battery terminal (+/–) p (STOP) 8 DIGIT AL MEGA B ASS s witc h 2 HOLD switch 9 A VLS s witc h 3 VOLUME +/– buttons !¼ 2 / REMOTE jack 4 EJECT button Headphones with Remote Control 5 6 7 8 4 9 1 2 3 1 Headphones 2 MD operate switch and buttons Ó • + (PLAY • FF) = (REW) p (STOP) 3 VOL +/– button 4 Display indicator 5 DI
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SECTION 3 DISASSEMBLY r The equipment can be removed using the following procedure. Upper panel ASSY set Main board Belt ASSY, Front panel ASSY Bottom panel ASSY Mechanism deck section Optical pick-up block ASSY Note : Follow the disassembly procedure in the numerical order given. 3-2. BOTTOM PANEL ASSY 3-1. UPPER PANEL ASSY 2 Screws (M1.4) pan precision Main section Upper panel ASSY 1 Screws (M1.4) pan precision 3 2 Screws (M1.4) pan precision 2 Bottom panel ASSY 1 Main section 1 Screws
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3-4. BELT ASSY, FRONT PANEL ASSY 32 5 Belt ASSY Boss Boss 4 7 Claws1 Claws Main section Front panel ASSY 8 Claw 6 Screw (M1.4) pan precision Boss 3-5. MECHANISM DECK SECTION Mechanism deck section 1 Remove claws 1 Remove claws 3 Chassis ASSY (main section) 2 Step screws – 5 –
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3-6. OPTICAL PICK-UP BLOCK ASSY Optical pick-up block ASSY 1 Screw precision 3 Main shaft 2 OP flexible board 4 5 Chassis ASSY (MD section) r NOTE When replacing the optical block, the OP flexible board protec- tive sheet (SW) is necessary. Before replacing, check where the sheet (SW) is pasted onto the old OP flexible board and paste it on the new OP flexible board in the same way. Pasting on the sheet (SW) : Paste on aligning the sheet (SW) center section with the edge of the OP flexible boar
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SECTION 4 TEST MODE Outline Configuration of Test Mode • In this set, overall adjustment mode is made available by enter- The test mode has the configuration given below. ing test mode to perform automatic adjustment of CD and MO. VOL In the overall adjustment mode, the disc is determined whether + key Overall Ó key it is CD or MO and adjustments are performed in sequence. If a adjustment (Start ?) p key mode (Auto?) fault is found, the location of the fault is displayed. Also, in servo p key
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(See page 7.) 2. Description of Each Mode 010 Offset adjustment 1 23 Mode Description 011 FE offset 012 TE offset Ó key p key MO adjustment 013 All servo ON 0 3 0 020 Laser power adjustment 031 to 039
Mode Description p key *1 021 MO power A Ó key 022 MO power E 023 CDL power Low reflection 024 CD power Ó key p key CD adjustment 0 4 0 030 MO adjustment Mode Description 041 to 048
031 MO EF balance *1 p key 032 MO EF gain Ó key 033 MO ABCD gain 034 MO focus gain Ó key p key CD adjustm
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060 Sled movement Audio Mode • Enter the test mode and press the VOLUME – key. Then, press Mode Description the ( key and the VOLUME + key in this turn to enter audio 061 Sled in mode. 062 Sled out 5 • When entering another mode, refer to the configuration of test mode. 070 Automatic adjustment 1. Structure of Audio Mode Mode Description Ó key Audio mode 071 Focus search 1 0 0 072 Access 32 Audio playback test Ó key 073 ADER check 1 1 0 headphones p key output 074 Tracking sensitivity adju
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SECTION 5 ELECTRICAL ADJUSTMENTS Power Mode Notes for Adjustment • Enter the test mode and press the VOLUME – key. Then, press • In this set, automatic adjustment of CD and MO can be per- the ( key and the VOLUME – key in this turn to enter power formed by entering the test mode. mode. • Adjustments are performed in the overall adjustment mode. If • When entering another mode, refer to the configuration of test an item is determined as NG, the item is readjusted in servo mode. mode. 1. Structure
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• In MO Automatic adjustment Mode * Remote commander display during automatic adjustment No. Mode Description 057
1 061 Sled in 2 071 Focus search 3 062 Sled out Adjustment value (flashing) 4 031 MO EF balance Mode No. under adjustment 5 032 MO EF gain 4. If result of automatic adjustment is OK, the following display 6 031 MO EF balance appears. 7 033 MO ABCD gain End-OK 047
8 034 MO focus gain 9 035 MO tracking gain 5. If result of automatic adjustment is NG, the following display 10 03
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Adjusting the OFF-track threshold 3. When the automatic adjustment is completed, the flashing ad- • Perform only for Ver. 1.000. justment value is lit. • Only for MO (use AU-1 disk). • Use the following procedure. 052
• Monitor (adjust) with a storage oscilloscope. 1. Set in Test mode (Manual mode). 2. Press the PLAYMODE key per 030. (2.6 volt operating mode • • • • • • Two battery marks light up.) Adjustment value (lit) 3. Check that the OP is at the center (not the outermost or inner- most
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SECTION 6 DIAGRAMS 6-1. EXPLANATION OF IC TERMINALS IC801 RU6815MF-0004 (VERSION 3.0) (SYSTEM CONTROL) IC801 RU6815MF-0006 (VERSION 3.3) (SYSTEM CONTROL) Pin No. Pin Name I/O Pin Description 1 – Not used (Fixed at “L” ). 2 UREG MON I Unreg voltage monitor input. 3 – Not used (Fixed at “L” ). 4 VREF I Reference voltage for power supply voltage adjustlment. 5 PLAY KEY I Set PLAY key input. 6 OPEN/CLS SW I OPEN/CLOSE switch input. L : Close 7 RMC KEY I Remote commander key input. 8 SET KEY I
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Pin No. Pin Name I/O Pin Description 48 – Not used (Open). 49 – Not used (Open). 50 VDD – Digital power supply (+2.6V or +2.8V). 51 VPP – Power for on board light. 52 VSS – Digital ground. 53 SLD 1R CON O Sled motor control signal output. 54 SLD 1F CON O Sled motor control signal output. 55 SLD 2R CON O Sled motor control signal output. 56 SLD 2F CON O Sled motor control signal output. 57 – Not used (Open). 58 – Not used (Open). 59 – Not used (Open). 60 – Not used (Open). 61 SPCK O Serial clock
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MZ-E44/E45 6-2. BLOCK DIAGRAM • Signal path. J : PLAY – 15 – – 16 – – 17 –
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MZ-E44/E45 6-3. PRINTED WIRING BOARDS r Semiconductor Location Ref. No. Location D351 I-10 D352 H-11 D801 I-5 D841 F-10 D901 D-5 D902 H-14 IC301 C-7 IC302 D-7 IC501 H-12 IC551 G-14 IC552 F-14 IC601 F-12 IC603 F-6 IC801 C-13 IC802 C-15 IC901 E-4 Q501 I-12 Q551 G-3 Q552 F-3 *Note: Use R1001 only with Ver.3.0 of microprocessor (IC801). Using R1001 with other microprocessor versions will cause operating errors so be sure to remove it. You can check the version with Test Mode (page 7). Note: •
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r 6-4. SCHEMATIC DIAGRAM Refer to page 25 for IC Block Diagrams. MZ-E44/E45 r Waveforms 1 800mVp-p VOLT/DIV : 200mV AC IC501 @¥ TIME/DIV : 5 μsec 2 2.7Vp-p 23μsec VOLT/DIV : 1V AC IC601 #» TIME/DIV : 10 μsec 3 2.6Vp-p 482nsec VOLT/DIV : 500mV AC IC601 $Á TIME/DIV : 200nsec 4 2.0 Vp-p 16.9344 MHz VOLT/DIV : 500mV AC IC601 $» TIME/DIV : 20nsec Note: • All capacitors are in μF unless otherwise noted. pF: μμF 50 WV or less are not indicated except for electrolytics and tantalums. 1 4 •
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MZ-E44/E45 SECTION 7 EXPLODED VIEWS r IC Block Diagrams IC551 MPC17A55FTA IC802 AK93C55AV-L IC552 TLC372CPWR IC301 BA3577FS-E2 NOTE : 8 6 5 • -XX, -X mean standardized parts, so they • The mechanical parts with no reference 7 VPP CS 1 VREF 8 VCC 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 may have some difference from the original number in the exploded views are not The components identified by mark ! V+ GENERATOR 20 NC or dotted line with mark ! are critical one. supplied. NC 19
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7-2. MAIN SECTION 61 MT-MZE44-140 66 58 61 59 60 57 57 62 65 56 53 64 63 54 55 55 not supplied 52 not supplied 51 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 51 3-703-502-11 SCREW 60 4-995-274-11 SPRING (O-C), TORSION 52 4-984-017-01 SCREW (1.7), TAPPING 53 A-3293-984-A MAIN BOARD, COMPLETE 61 4-982-418-01 DAMPER 54 4-211-392-01 PLATE, BLIND 62 4-211-118-01 LID, BATTERY CASE 55 3-335-797-91 SCREW (M1.4), TOOTHED LOCK 63 4-212-087-01 TERMINAL 64 X-4950-232-1 CASE ASS
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7-3. MECHANISM DECK SECTION (MT-MZE44-140) 107 113 106 M902 M901 109 104 111 104 114 103 110 * 102 not R1001 supplied 112 108 101 101 105 115 *Note : 116 Use R1001 only with Ver.3.0 of microprocessor (IC801). Using R1001 with other microprocessor versions will The components identified by mark ! or dotted cause operating errors so be sure to remove it. line with mark ! are critical for safety. You can check the version with Test Mode (page 7). Replace only with part number specified. Ref.
