Sony MZEP-11 Service manual
Ver 1.2 2004. 03
9-923-222-14
2004C02-1
© 2004.03
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. SERVICING NOTE.......................................................... 3
2. GENERAL
Location and Function of Controls .................................... 6
3. DISASSEMBLY ............................................................... 8
4. TEST MODE ...................................................................11
5. ELECTRICAL ADJUSTMENTS ................................. 14
6. DIAGRAMS
6-1. IC Pin Description .................................................... 16
6-2. Block Diagram.......................................................... 18
6-3. Printed Wiring Board................................................ 21
6-4. Schematic Diagram................................................... 25
7. EXPLODED VIEWS
7-1. Panel Section ............................................................ 32
7-2. Mechanism Deck Section (MT-MZEP10-129) ........ 33
Ver 1.1 1998.05
8. ELECTRICAL PARTS LIST ........................................ 34
This Mini Disc player is classified as a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT label is located on
the bottom exterior.
IN NO EVENT SHALL SELLER BE
LIABLE FOR ANY DIRECT,
INCIDENT AL OR CONSEQUENTIAL
DAMAGES OF ANY NATURE, OR
LOSSES OR EXPENSES RESULTING
FROM ANY DEFECTIVE PRODUCT
OR THE USE OF ANY PRODUCT.
“MD WALKMAN” is a trademark of Sony
Corporation.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270°C during
repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering or
unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE WITH
MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES
SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT .
NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES
SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL
OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
– 2 –
SECTION 1
y
SERVICING NOTE
When repairing this device with the power on, if you remove the main board, this device stops working.
In this case, you work without the device stopping by fastening the hook of the Open/Close detection switch (S801) with tape.
Chassis ass
Tape
Main board
Open/Close switch (S801)
– 3 –
OPERATIONS OF MECHANISM (MZ-EP11)
When loading a disc
The disc shutter 1 opens when a disc is loaded. (Fig. 1)
≥
When a disc is loaded, the open lever 2 moves in arrow direction
a, and the holder assembly 3 lock is released. (Fig. 1 to 3)
≥
The slider 4 slides in arrow direction b, and the holder assembly
3 moves down to the chassis assembly (below). (Fig. 4)
≥
The OPEN/CLOSE SW (S801) is turned ON by the connection
lever linked. (Fig. 1)
≥
The wakeup mode is set and the power circuit starts operating.
Disc shutter
OPEN/CLOSE SW (S801)
1
Insert the Mini Disc
ON
(Fig. 1)
Open lever
Slider
2
b
4
Lock
Relesse
Open lever
Insert the Mini Disc
Open lever
2
2
(Fig. 2)
Slider
Descends to chassis side (below)
b
4
(Fig. 4)
Slider
Holder assembly
– 4 –
4
(Fig. 3)
3
When removing the disc
When the open knob 1 is slid in arrow direction a, and the open
slider 2 lock is released, the disc shutter 3 opens. (Fig. 5)
≥
The slider 4 slides in arrow direction b, and the holder assembly
5 moves up to the upper panel (above). (Fig. 6, Fig. 8)
≥
The OPEN/CLOSE SW (S801) is turned OFF by the connection
lever linked. (Fig. 5)
≥
The optical pick-up block 6 moves to the inner circumference c.
(Fig. 5)
≥
The disc 7 is pushed by the open lever 8, and ejected out from
the holder assembly 5. (Fig. 7)
≥
The sleep mode is set and the power supply stops.
OPEN/CLOSE SW (S801)
Disc shutter
Optical pick-up block
3
6
Open lever
OFF
8
Disc is ejscted
Open knob
7
Open Slider
(Release)
2
(Fig. 5)
Moves up to the upper panel (above)
a
1
Slider
Slider
Holder assembly
b
5
4
4
Relesse
Lock
Open lever
Open lever
Disc is ejscted
8
8
(Fig. 6)
7
(Fig. 7)
Slider
4
b
(Fig. 8)
– 5 –
LOCATION AND FUNCTION OF CONTROLS
r
Main Unit
SECTION 2
GENERAL
1 AVLS switch
2 HOLD switch
3 DIGITAL MEGA BASS switch
4 Battery compartment
5 2 / REMOTE jack
6 MD operate buttons
( (play) button
=, +button
p button
7 EJECT knob
8 VOLUME +, – buttons
9 DC IN 1.5V jack
– 6 –
Ver 1.1 1998.05
r
Headphones with Remote Control
Except US model
1
6
7
23
Tourist model
4
5
8
1 Headphones
2 P (pause) button
3 (/+, = buttons
4 HOLD switch
5 p (stop) button
6 VOL +, – buttons
7 DISPLAY button
8 PLAYMODE button
US model
r
Display windows (Remote Control)
Tourist model
1
Except T ourist model
6
3
Except Tourist model
4
5
1
7
8
2
4
1 Headphones
2 P (pause) button
3 (/+, = control
4 HOLD switch
5 p (stop) button
6 VOL +, – buttons
7 DISPLAY button
8 PLAYMODE button
23
1 Character display
2 Disc revolve indicator
3 Battery condition indicator
4 Track number display
– 7 –
SECTION 3
)
)
DISASSEMBLY
r
The equipment can be removed using the following procedure.
Set
Panel (X) upper, Bottom panel Plate (Control) assy, ornamental Main board
Mechanism deck
Optical pick-up
Note : Follow the disassembly procedure in the numerical order given.
3-1. PANEL (X) UPPER, BOTTOM PANEL REMOVAL
2
Screws
(M1.4 precision pan)
Panel (X) upper
Lid, battery case
5
Screws
(M1.4 precision pan)
* Caution during assembly
Align the MEGA BASS knob,
AVLS knob and the HOLD knob
position with the switch
on the Main board.
Bottom panel
1
4
6
3
Screws
(M1.4 precision pan)
7
Stripe (A) assy,
Ornamental
5
Screws
(M1.4 precision pan
3-2. PLATE (CONTROL) ASSY, ORNAMENTAL REMOVAL
1
Spring (Shutter),
Tension
4
Screw (step)
3
Shutter
Plate (Control) assy,
ornamental
2
Screw
(M1.4 precision pan)
5
Screws
(M1.4 precision pan)
6
4
Screw (step)
2
Screw
(M1.4 precision pan
– 8 –
Loading...