Sony NW-E55 / NW-E75 / NW-E90 / NW-E95 (serv.man2) Service Manual ▷ View online
SERVICE MANUAL
Ver. 1.3 2005.09
SUPPLEMENT-1
Subject: DISPLAY board and MAIN board changed to
suffix-21 from suffix-11
9-877-993-81
NW-E55/E75/E90/E95
US Model
Canadian Model
NW-E75/E95
AEP Model
NW-E55/E75/E95
UK Model
NW-E55/E75
E Model
Tourist Model
NW-E90
A TYPE
B TYPE
CN402
39
40
1
2
IC460
DISPLAY BOARD
(SIDE A)
CN401
23
24
25
26
39
40
1
2
MAIN BOARD
(SIDE B)
CN402
23
24
1
2
DISPLAY BOARD
(SIDE A)
CN401
23
24
1
2
MAIN BOARD
(SIDE B)
NW-E90/E95 consists of the two model, one model uses IC460 while the other model does not use IC460.
In this supplement-1, the model using IC460 is called “A TYPE” and the other model not using IC460 is called “B TYPE”
In this supplement-1, the model using IC460 is called “A TYPE” and the other model not using IC460 is called “B TYPE”
2
NW-E55/E75/E90/E95
Part number of printed wiring board changed to suffix-21 from suffix-11.
It has any difference between suffix-11 and suffix-21.
This supplement-1 describes printed wiring boards, schematic diagrams and electrical parts list about these boards.
Refer to original service manual (9-877-993-0[]) for other information.
It has any difference between suffix-11 and suffix-21.
This supplement-1 describes printed wiring boards, schematic diagrams and electrical parts list about these boards.
Refer to original service manual (9-877-993-0[]) for other information.
• How to distinguish
Location of parts number on changed printed wiring board
DISPLAY BOARD
(SIDE A)
MAIN BOARD
(SIDE B)
FORMER TYPE : 1-862-329-11
NEW TYPE : 1-862-329-21
NEW TYPE : 1-862-329-21
FORMER TYPE : 1-862-328-11
NEW TYPE : 1-862-328-21
NEW TYPE : 1-862-328-21
3
3
NW-E55/E75/E90/E95
NW-E55/E75/E90/E95
DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in
• 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
Ω
and
1
/
4
W or less unless otherwise specified.
•
%
: indicates tolerance.
•
C
: panel designation.
•
f
: internal component
•
: 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
no mark : PLAY
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
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.
• DISPLAY board and MAIN board are multi-layer printed
board.
However, the patterns of intermediate-layer have not been
included in the diagram.
However, the patterns of intermediate-layer have not been
included in the diagram.
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side A)
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
MEMO
1
IC700
8
(OSCOUT)
0.5 V/div, 10
µ
sec/div
1.1 Vp-p
31.25
µ
sec
4
4
NW-E55/E75/E90/E95
NW-E55/E75/E90/E95
PRINTED WIRING BOARD – DISPLAY BOARD (SIDE A) –
:Uses unleaded solder.
• Semiconductor
Location
Ref. No.
Location
D703
D-7
IC460
D-4
IC460
R852
1
20
R870
1
CN402
2
23
25
24
26
39
40
LIQUID
CRYSTAL
DISPLAY
A
MAIN
BOARD
CN401
SUPPLEMENT-1
Page 8
(
(
1-862-329-
21
(21)
DISPLAY BOARD
(SIDE A)
*2
*1
*1
*2
*2
*2
*1
*2
*2
*2
*1
1
24
48
25
R872
R871
R873
*1
*1
*1
*1
*1
*1
*1
*1
R877
R874
R875
C870
C871
R876
C460
C873
C872
*1 only for E90 (A TYPE) and E95 (A TYPE)
*2 only for E55, E75, E90 (B TYPE) and E95 (B TYPE)
1
2
A
B
C
D
E
F
3
4
5
6
7
9
8
10