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Sony MZ-E44 Service Manual

Portable minidisc player
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Download this manual See also: Operating Instructions
SERVICE MANUAL
Ver 1.1 1999.01
Photo : MZ-E44 (SILVER)
US and foreign patents licensed from Dolby
Laboratories Licensing Corporation
MD Section
Audio playing system
Minidisc digital audio system
Laser diode properties
Material : GaAlAs
Wavelength :
=790nm
Emission duration : continuous
Laser output : less than 44.6 W*
* This output is the value measured at a distance of 200 mm from the
objective lens surface on the optical pick-up block with 7mm aperture.
Revolutions
400 rpm to 900 rpm (CLV)
Error correction
Advanced Cross Interleave Reed Solomon Code (ACIRC)
Sampling frequency
44.1kHz
Coding
Adaptive Transform Acoustic Coding (ATRAC)
Modulation system
EFM (Eight to Fourteen Modulation)
Number of channels
2 stereo channels
1 monaural channel
Frequency response
20 to 20,000 Hz ± 3 dB
Wow and Flutter
Below measurable limit
Outputs
Headphones : stereo mini-jack, maximum output level 5mW+5mW,
load impedance 16 ohm
MICROFILM
MZ-E44/E45
Photo : MZ-E45 (GRAY)
Model Name Using Similar Mechanism
MD Mechanism Type
Optical Pick-up Mechanism Type
SPECIFICATIONS
General
Power requirements
Rechageable battery (supplied)
Nickel metal hydride rechargeable battery NH-9WM (N)
One LR6 (size AA) alkaline battery (not supplied)
Sony AC Power Adaptor AC-E15L (not supplied) connected at the
DC IN 1.5V jack
Battery operation time
Batteries
Nickel metal hydride
Rechargeable battery (NH-9WM (N))
One LR6 (size AA)
Sony alkaline dry batteries
Nickel metal hydride (NH-9WM (N)) +
One LR6 (size AA)
Dimensions
Approx. 87 x 17.8 x 91.5 mm (w/h/d)
1
23
(3
/
x
/
x 3
2
32
Mass
Approx. 115 g (4.1 oz.) the player only
Approx. 155 g (5.5 oz.) incl. a premastered MD and a nickel
metal hydride rechargeable battery NH-9WM (N)
Supplied accessories
Battery charger (1)
Rechargeable battery (1)
Rechargeable battery carrying case (1)
Headphones with a remote control (1)
Dry battery case (1)
Handstrap (1)
Carrying pouch (1)
LR6 (size AA) alkaline battery (1) (Tourist model only)
Design and specifications are subject to change without notice.
PORTABLE MINIDISC PLAYER
US Model
AEP Model
UK Model
Australian Model
Tourist Model
E Model
NEW
MT-MZE44-140
ODX-1A/1B
Playback
Approx.
5.5 hours
Approx.
8.5 hours
Approx.
16 hours
5
/
in) not including projecting parts and controls
8
MZ-E44
MZ-E44/E45

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Summary of Contents for Sony MZ-E44

  • Page 1 Material : GaAlAs One LR6 (size AA) alkaline battery (not supplied) Wavelength : =790nm Sony AC Power Adaptor AC-E15L (not supplied) connected at the Emission duration : continuous DC IN 1.5V jack Laser output : less than 44.6 W* Battery operation time...

  • Page 2: Table Of Contents

    FROM ANY DEFECTIVE PRODUCT OR THE USE OF ANY PRODUCT. SAFETY-RELATED COMPONENT WARNING!! “MD WALKMAN” is a trademark of Sony COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH Corporation. MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.

  • Page 3: General

    SECTION 2 GENERAL LOCATION AND FUNCTION OF CONTROLS Main Unit !º 1 MD operate buttons 5 OPERA TE lamp 6 Battery compartment ” • + (PLAY • FF ) 7 External battery terminal (+/–) = (REW ) 8 DIGITAL MEGA B ASS s witc h p (STOP) 2 HOLD switch 9 AVLS s witc h...

  • Page 4: Disassembly

    SECTION 3 DISASSEMBLY The equipment can be removed using the following procedure. Upper panel ASSY 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.

  • Page 5: Belt Assy, Front Panel Assy

    3-4. BELT ASSY, FRONT PANEL ASSY 5 Belt ASSY Boss Boss 7 Claws Claws Main section Front panel ASSY Claw 6 Screw (M1.4) pan precision Boss 3-5. MECHANISM DECK SECTION Mechanism deck section 1 Remove claws 1 Remove claws Chassis ASSY (main section) 2 Step screws –...
  • Page 6 3-6. OPTICAL PICK-UP BLOCK ASSY Optical pick-up block ASSY 1 Screw precision Main shaft 2 OP flexible board Chassis ASSY (MD section) 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.

  • Page 7: Test Mode

    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. In the overall adjustment mode, the disc is determined whether + key Overall...
  • Page 8 2. Description of Each Mode (See page 7.) 010 Offset adjustment Mode Description FE offset TE offset ” key p key MO adjustment All servo ON 0 3 0 020 Laser power adjustment 031 to 039 Mode Description p key MO power A ”...
  • Page 9 060 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 Sled in mode. Sled out 5 •...

  • Page 10: Electrical Adjustments

    1. Enter the test mode and press the VOLUME + key to enter over- Power mode 3 0 0 all adjustment mode. 2. Insert the CD test disc (TGYS-1) or SONY MO disc (recorded) ” key commercially available. UNREG check 31 0 3.
  • Page 11 • In MO Automatic adjustment Mode * Remote commander display during automatic adjustment Mode Description Sled in Focus search Sled out Adjustment value (flashing) MO EF balance Mode No. under adjustment MO EF gain 4. If result of automatic adjustment is OK, the following display appears.
  • Page 12 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. 0 5 2 • Monitor (adjust) with a storage oscilloscope. 1.

  • Page 13: Diagrams

    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 Pin Description – Not used (Fixed at “L” ). UREG MON Unreg voltage monitor input. – Not used (Fixed at “L”...
  • Page 14 Pin No. Pin Name Pin Description – Not used (Open). – Not used (Open). – Digital power supply (+2.6V or +2.8V). – Power for on board light. – Digital ground. SLD 1R CON Sled motor control signal output. SLD 1F CON Sled motor control signal output.

  • Page 15: Block Diagram

    MZ-E44/E45 6-2. BLOCK DIAGRAM • Signal path. : PLAY – 15 – – 16 – – 17 –...

  • Page 16: Printed Wiring Boards

    MZ-E44/E45 6-3. PRINTED WIRING BOARDS Semiconductor Location Ref. No. Location D351 I-10 D352 H-11 D801 D841 F-10 D901 D902 H-14 IC301 IC302 IC501 H-12 IC551 G-14 IC552 F-14 IC601 F-12 IC603 IC801 C-13 IC802 C-15 IC901 Q501 I-12 Q551 Q552 *Note: Use R1001 only with Ver.3.0 of microprocessor (IC801).

  • Page 17: Schematic Diagram

    6-4. SCHEMATIC DIAGRAM Refer to page 25 for IC Block Diagrams. MZ-E44/E45 Waveforms 800mVp-p VOLT/DIV : 200mV AC IC501 @• TIME/DIV : 5 sec 2.7Vp-p 23 sec IC601 #ª VOLT/DIV : 1V AC TIME/DIV : 10 sec 2.6Vp-p 482nsec IC601 $¡...

  • Page 18: Panel Section

    4-963-883-31 SCREW (M1.4), PRECISION PAN X-4950-236-1 BELT ASSY ATDT MONITOR I/O etc. XWE2 TFOUT XATWE (MZ-E44:BLUE, MZ-E45:ORANGE, GRAY) X-4950-235-1 PANEL ASSY, BOTTOM (SILVER) (MZ-E44) TROUT DREQ X-4951-601-1 PANEL ASSY, UPPER (SILVER) (MZ-E44) DRD1 FROUT XBUSY X-4951-601-2 PANEL ASSY, UPPER (BLUE) (MZ-E44)

  • Page 19: Main Section

    7-2. MAIN SECTION MT-MZE44-140 not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-703-502-11 SCREW 4-995-274-11 SPRING (O-C), TORSION 4-984-017-01 SCREW (1.7), TAPPING A-3293-984-A MAIN BOARD, COMPLETE 4-982-418-01 DAMPER 4-211-392-01 PLATE, BLIND 4-211-118-01 LID, BATTERY CASE 3-335-797-91 SCREW (M1.4), TOOTHED LOCK 4-212-087-01 TERMINAL X-4950-232-1 CASE ASSY, BATTERY...

  • Page 20: Mechanism Deck Section

    7-3. MECHANISM DECK SECTION (MT-MZE44-140) M902 M901 R1001 supplied *Note : 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.

  • Page 21: Electrical Parts List

    SECTION 8 MAIN ELECTRICAL PARTS LIST NOTE : • Due to standardization, replacements in the • SEMICONDUCTORS The components identified by mark ! parts list may be different from the parts In each case, u : , for example : or dotted line with mark ! are critical specified in the diagrams or the components uA..
  • Page 22 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C914 1-126-246-11 ELECT CHIP 220uF < RESISTOR > C918 1-115-156-11 CERAMIC CHIP C919 1-115-156-11 CERAMIC CHIP R101 1-216-835-11 METAL CHIP 1/16W R102 1-216-831-11 METAL CHIP 6.8K 1/16W <...
  • Page 23 1-759-628-11 CASE, BATTERY 3-008-521-01 CASE, BATTERY CHARG 3-864-524-11 MANUAL, INSTRUCTION (SPANISH, CHINESE) (AEP,E, HK,JE) 3-864-524-21 MANUAL, INSTRUCTION (ENGLISH, FRENCH) 3-864-524-31 MANUAL, INSTRUCTION (GERMAN, DUTCH) (MZ-E44:AEP) 3-864-524-41 MANUAL, INSTRUCTION (ITALIAN, PORTGUESE) (MZ-E44:AEP) 3-864-524-51 MANUAL, INSTRUCTION (SWEDISH, FINNISH) (MZ-E44:AEP) 3-864-524-61 MANUAL, INSTRUCTION (JAPANESE,...
  • Page 24 MZ-E44/E45 99A0280-1 Sony Corporation Printed in Japan © 1999.1 9-924-929-12 Personal A&V Products Company Published by Quality Engineering Dept. – 34 – (Shibaura)

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