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SERVICE MANUAL
Ver 1.1 2000.01
US and foreign patents licensed from Dolby
Laboratories Licensing Corporation
System
Audio playing system
Minidisc digital audio system
Laser diode properties
Material : GaAlAs
Wavelength : λ =790nm
Emission duration : continuous
Laser output : less than 44.6 µW*
* 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
General
Power requirements
Nickel metal hydride rechargeable battery NH-14WM (supplied)
One LR6 (size AA) alkaline battery (not supplied)
Sony AC Power Adaptor (not supplied) connected at the DC IN
1.5V jack
MICROFILM
Model Name Using Similar Mechanism
MD Mechanism Type
Optical Pick-up Mechanism Type
SPECIFICATIONS
Battery operation time
Batteries
Ni-MH
Rechargeable battery (NH-14WM)
One LR6 (size AA)
Sony alkaline batteries
One LR6 (size AA) and a
Ni-MH (NH-14WM)
Ni-CD
Rechageable battery (NC-6WM)
One LR6 (size AA) and a
Ni-CD (NC-6WM)
Dimensions
Approx. 86 x 16.3 x 75.4 mm (w/h/d)
not including projecting parts and controls
Mass
Approx. 98 g the player only
Approx. 141 g incl. a premastered MD and a nickel
metal hydride rechargeable battery NH-14WM (N)
Supplied accessories
Battery charger (1)
Rechargeable battery (1)
Rechargeable battery carrying case (1)
Headphones with a remote control (1)
Dry battery case (1)
Carrying pouch (1)
AC plug adaptor (E, Tourist model) (1)
Design and specifications are subject to change without notice.
PORTABLE MINIDISC PLAYER
MZ-E75
US Model
AEP Model
UK Model
Australian Model
E Model
Tourist Model
NEW
MT-MZE75-167
ODX-1B
Playback
Approx.
16 hours
Approx.
22 hours
Approx.
42 hours
Approx.
8 hours
Approx.
32 hours
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Table of Contents
Related Manuals for Sony MD Walkman MZ-E75
Summary of Contents for Sony MD Walkman MZ-E75
- Page 1 Design and specifications are subject to change without notice. load impedance 16 ohm General Power requirements Nickel metal hydride rechargeable battery NH-14WM (supplied) PORTABLE MINIDISC PLAYER One LR6 (size AA) alkaline battery (not supplied) Sony AC Power Adaptor (not supplied) connected at the DC IN 1.5V jack MICROFILM...
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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 1 i 1 jack 8 VOLUME + button 2 OPEN button 9 VOLUME – button 3 OPERATE indicator q; External battery terminal (+/–) 4 > B button qa DIGITAL SOUND PRESET switch 5 . -
Page 4: Disassembly
SECTION 3 DISASSEMBLY The equipment can be removed using the following procedure. Upper panel ASSY, “Panel ASSY, bottom” Belt, Ornamental Main board Optical pick-up block ASSY Note : Follow the disassembly procedure in the numerical order given. 3-1. UPPER PANEL ASSY, “PANEL ASSY, BOTTOM” Upper panel ASSY 1 Screws (1.4) 3 Screw (1.7) -
Page 5: Main Board
3-3. MAIN BOARD 1 Screws (M1.4 toothed lock) 2 Screw (HP), step Main board 3 CLV fexble board 5 OP flexble board Main unit 3-4. OPTICAL PICK-UP BLOCK ASSY Optical pick-up block ASSY 3 Screw (M1.4) precision pan OP flexible board Shaft (Main) Double sided adhesive tape... -
Page 6: 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. B/>... - Page 7 2. Description of Each Mode (See page 6.) 010 Offset adjustment Mode Description VC offset, FE offset, ABCD offset Not used x key B/> key MO adjustment Not used 0 3 0 020 Laser power adjustment 031 to 039, Mode Description 03a to 03c x key...
- Page 8 060 Sled movement Power Mode • Enter the test mode and press the VOL – key. Then, press the B/ Mode Description > key and the VOLUME – key in this turn to enter power Sled in mode. Sled out •...
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Page 9: Electrical Adjustments
1. Enter the test mode and press the VOL + key to enter overall appears. adjustment mode. 2. Insert the CD test disc (TGYS-1) or SONY MO disc (recorded) End-OK commercially available. 3. Press the B/> key twice. The disc is determined whether it is CD or MO and each adjustment mode is set. -
Page 10: Diagrams
SECTION 6 DIAGRAMS 6-1. EXPLANATION OF IC TERMINALS • MAIN BOARD IC501 CXA2523ATQ-T4 (RF AMP, FOCUS/TRACKING ERROR AMP) Pin No. Pin name Description I-V converted RF signal I input from the optical pick-up block detector I-V converted RF signal J input from the optical pick-up block detector Middle point voltage (+1.2V) generation output terminal 4 to 9 A to F... - Page 11 • MAIN BOARD IC801 RU6915MF-0005 (SYSTEM CONTROLLER) Pin No. Pin Name Description THOLD Two shaft device tracking coil-end voltage monitor input terminal (A/D input) UREG MON Un-regulator power supply voltage monitor input terminal (A/D input) VC MON VC (middle point voltage) power supply voltage monitor input terminal (A/D input) VREF Input terminal for power supply voltage adjustment reference voltage (+2V) (A/D input) PLAY KEY...
- Page 12 Pin No. Pin Name Description CLV V MON Spindle servo (V) timing signal input from the CXD2661GA-2 (IC601) CLV W MON Spindle servo (W) timing signal input from the CXD2661GA-2 (IC601) CLV U CON Spindle servo (U) drive signal output for the MPC17A55FTA (IC551) CLV V CON Spindle servo (V) drive signal output for the MPC17A55FTA (IC551) CLV W CON...
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Page 13: Block Diagram
MZ-E75 6-2. BLOCK DIAGRAM J302 HEADPHONE AMP IC301 VIN R R OUT AOUTR FILI RF AMP, VIN L L OUT FOCUS/TRACKING ERROR AMP AOUTL IC501 CLTV 48 47 FILO BEEP OUTA J301 BEEP IN DOUT BEEP BEEP OUTB DATA DATAI... -
Page 14: Printed Wiring Boards
MZ-E75 6-3. PRINTED WIRING BOARDS EXTERNAL BATTERY CASE Semiconductor Locatiom DC IN 1.5V DRY BATTERY Ref. No. Location SIZE "AA" D351 (IEC DESIGNATION LR6) D352 1PC, 1.5V [MAIN BOARD] (SIDE B) D353 B-14 [MAIN BOARD] (SIDE A) D354 B-15 D353... -
Page 15: Schematic Diagram
6-4. SCHEMATIC DIAGRAM MZ-E75 WAVEFORMS 935mVp-p 1.2Vp-p 22.579MHz IC501 ek IC601 w; VOLT/DIV : 0.5 V AC VOLT/DIV : 0.2 V AC TIME/DIV : 0.5 µsec TIME/DIV : 20 µsec (RF) (OSC0) 148mVp-p 1.2Vp-p 5.65 µ sec IC501 rh VOLT/DIV : 0.5 V AC... -
Page 16: Main Section
SECTION 7 EXPLODED VIEWS IC BLOCK DIAGRAMS IC501 CXA2523ATQ-T4 IC551 MPC17A55FTA NOTE : • -XX, -X mean standardized parts, so they • The mechanical parts with no reference IC301 TA2131FL-EL The components identified by mark 0 IC901 MPC1830ADTBEL may have some difference from the original number in the exploded views are not or dotted line with mark 0 are critical one. -
Page 17: Mechanism Deck Section
7-2. MECHANISM DECK SECTION (MT-MZE75-167) M902 M901 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 Remark Ref. No. Part No. Description Remark 4-982-561-11 SPRING, RACK X-4948-793-1 LEADSCREW ASSY... -
Page 18: Electrical Parts List
SECTION 8 MAIN ELECTRICAL PARTS LIST NOTE : • Due to standardization, replacements in the • SEMICONDUCTORS In each case, u : µ , for example : The components identified by mark 0 parts list may be different from the parts or dotted line with mark 0 are critical uA.. - Page 19 8-719-017-58 DIODE MA8068 D355 8-719-056-72 DIODE UDZ-TE-17-2.4B < RESISTOR > D356 8-719-056-72 DIODE UDZ-TE-17-2.4B R101 1-216-864-11 METAL CHIP 1/16W D801 8-719-061-82 LED TLSU1002(TPX1,SONY) (OPERATE) R103 1-216-829-11 METAL CHIP 4.7K 1/16W D841 8-719-066-17 DIODE FTZ6.8E-T148 R105 1-216-835-11 METAL CHIP 1/16W D901...
- Page 20 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R511 1-216-833-91 RES,CHIP 1/16W R842 1-216-809-11 METAL CHIP 1/16W R512 1-216-843-11 METAL CHIP 1/16W R901 1-216-845-11 METAL CHIP 100K 1/16W R513 1-216-864-11 METAL CHIP 1/16W R902 1-216-849-11 METAL CHIP 220K 1/16W R514...
- Page 21 Ref. No. Part No. Description Remark ACCESSORIES & PACKING MATERIALS ******************************* 1-418-493-62 REMOTE CONTROL UNIT 0 502 1-528-252-21 BATTERY CHARGER (BC-7S) (UK) 0 502 1-528-434-13 BATTERY CHARGER (BC-7SG) (AUS) 0 502 1-528-580-21 BATTERY CHARGER (BC-7HT) (E,JE) REMOTE CONTROL UNIT BATTERY CHARGER 0 502 1-528-713-23 BATTERY CHARGER (BC-7DC) (US) 0 502...
- Page 22 MZ-E75 Sony Corporation 2000A0270-1 9-927-170-12 Personal Audio Division Company Printed in Japan © 2000.1 – 32 – Published by General Engineering Dept.