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Model
NW-E99
Pages
23
Size
1.23 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
nw-e99.pdf
Date

Sony NW-E99 Service Manual ▷ View online

5
NW-E99
SECTION 2
TEST MODE
STANDING PROCEDURE
Procedure 1:  Set a dry battery into NW-E99, and keep the battery
        lid open.
Procedure 2:  In HOLD state, while pushing  Nx  and [GROUP]
        button, turn power on by closing the battery lid of
        NW-E99.
Procedure 3:  Set HOLD state off.
After starting up test mode, the following contents can be checked.
TEST MODE
•   Nx  button
   The KEY test mode is activated. All key inputs are completed,
     then  Nx    button is pressed, restart. (Be aware that the
    initialization is included on all key input.)
•  [MENU] button
    EL0 (blue) lights on/off.
•  [GROUP] button
    EL1 (green) lights on/off.
•   -/>
    All LCD lights and ACCESS LED lights off.
•   ./+
    All LCD lights and ACCESS LED lights on.
•  [VOL +] button
    BEEP turns on.
•  [VOL --] button
    BEEP turns off.
•  [  REPEAT       SOUND] button
    Initialized. (Turns to the factory preset state, time, volume setting
   and so on.)
   The music data, files and so on in the memory are not changed.
6
NW-E99
SECTION 3
DISASSEMBLY
Note:
Follow the disassembly procedure in the numerical order given.
Note:
Disassemble the unit in the order as shown below.
3-1. CASE, CHASSIS (FRONT) ASSY
SET
3-1. CASE,CHASSIS (FRONT) ASSY
(Page 6)
3-2. DISPLAY BOARD ASSY
(Page 7)
3-3. MAIN BOARD ASSY
(Page 7)
1
 case
3
 chassis (front)
4
 three button (cup)
5
 window (led)
2
 three claws
7
NW-E99
3-2. DISPLAY BOARD ASSY
3-3. MAIN BOARD ASSY
4
 DISPLAY board assy
2
 tapping screw (1.7)
3
 cover section
1
 
lid (usb) (sub assy)
4
 MAIN board assy
3
 chassis (rear)
ornament  assy 
2
 two claws
1
 tapping screw (B1.7 
× 
7)
8
NW-E99
SECTION 4
DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted. (p: pF) 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise specified.
%
: indicates tolerance.
C
: panel designation.
: B+ Line.
• Power voltage is dc 1.5 V and fed with regulated dc power supply
from battery terminal.
• Voltages and waveforms are dc with respect to ground under no-
signal (detuned) conditions.
no mark : PLAY
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal production toler-
ances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
• Circled numbers refer to waveforms.
• Signal path.
F
: PLAY
a
: DIGITAL OUT
k
: DIGITAL IN
Note on Printed Wiring Board
•  
X
: parts extracted from the component side.
•  
Y
: parts extracted from the conductor side.
•  
: Pattern from the side which enables seeing.
: Through hole.
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side A)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side B)
the parts face are indicated.
Waveform
1
 
IC700 
8
 (OSCOUT)
0.5 V/div, 10 
µ
sec/div
1.1 Vp-p
31.25 
µ
sec
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