Sony NW-E2 / NW-E3 Service Manual ▷ View online
– 9 –
SECTION 3
TEST MODE
Setting the Test Mode
To enter the test mode, two methods are available :
1. Entering method with key input.
1. Entering method with key input.
Turn the HOLD switch to ON. While holding down the Bx key, press the following keys in the following order :
VOLUME +
VOLUME +
t VOLUME – t VOLUME – t VOLUME + t VOLUME – t MEGA BASS t MEGA BASS t DISPLAY
Note :
Push each key for less than 3 seconds.
2. Entering method by shorting the test point.
C758
6
R926
R812
3
3
R811
R810
R702
JC704
SL701
(TEST)
Q831
Q832
IC820
1
2
3
5
MAIN BOARD (SIDE A)
Solder brige the test point SL701 (TEST) on the main board and turn on the power.
Releasing the TEST mode
1. When test mode was entered with key input, turn off the power supply.
2. When test mode was entered by shorting the test point, turn off the power supply and open the solder brige of SL701 (TEST) on the main
2. When test mode was entered by shorting the test point, turn off the power supply and open the solder brige of SL701 (TEST) on the main
board.
Configuration of Test Mode
The test mode has the configuration given below.
Bx
: Stop/play key
(+)
: VOLUME + key
(–)
: VOLUME – key
LCD
Check
Ver. /
destination
display
All display
lit
(+)
(–)
All display
off
Flash memory
bad block
check
Bx
Bx
(+)
(–)
(+)
(–)
Destination
setting
Contrast
adjustment
(+)
(–)
Low voltage
check
(–)
(–)
Bx
Bx
(+)
(–)
High DC
detection
detection
check
Low DC
detection
check
(+)
(–)
(+)
Cukoo I/F
Connection
check
(+)
(+)
(–)
USB
check
Test mode
Short : Test mode
Open : Normal mode
Short : Test mode
Open : Normal mode
(
)
– 10 –
Description of each Mode
LCD check
Check for unusual condition in any LCD segments and common signal. Visually check
Bx key : check start
Flash memory bad block check
OK
: The backlight turns on
NG
: The backlight turns on and off
AVLS key : select the destination (US, E, French, J).
Destination setting
Bx key : check start
OK
: The backlight turns on
NG
: The backlight turns on and off
Contrast adjustment
Display
n LCD 45 – 13
contrast value (Initial value : 45)
>, . key : Select the contrast value.
Bx key
: Enter the contrast value.
Normally, do not perform this adjustment.
Low voltage check
When a battery is low voltage condition is detected, the backlight turns on.
Battery high voltage detection check
High DC detection check
OK
: The backlight turns on
NG
: The backlight turns on and off
Battery low voltage detection check
Low DC detection check
OK
: The backlight turns on
NG
: The backlight turns on and off
Use the Cukoo connector
USB check
OK
: The backlight turns on
NG
: The backlight turns on and off
Use the Cukoo connector
Cukoo I/F connection check
OK
: The backlight turns on
NG
: The backlight turns on and off
n
– 11 –
– 12 –
NW-E3
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAMS
• Signal path.
F
: ANALOG
J
: DIGITAL
Ver 1.1 2000.07
– 13 –
– 14 –
NW-E3
4-2. PRINTED WIRING BOARDS – MAIN SECTION –
D781
G-5
D782
G-3
D783
B-6
IC510
E-6
IC710
C-3
IC751
C-5
IC752
E-3
IC780
H-6
IC810
C-6
IC820
B-6
IC851
G-3
IC852
H-6
IC853
G-6
Q701
B-2
Q702
H-3
Q831
B-6
Q832
B-6
Q833
B-5
Ref. No.
Location
z
Semiconductor
Location
Note:
• X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
• Main board is six-layer printed board.
However, the patterns of layers 2 to 5 have not been
included in this diagrams.
included in this diagrams.
Lead layout of
conventional IC
conventional IC
CSP (chip size package)
02
R764
R773
R767
R771
R752
C757
C703
C721 C722
C723
C724 C725
R703
R757
R783
R772
R707
JC701
R706
R770
R769
R716
R774
R775
R786
R705
JC722
C727
C704
C719
C730
C726
Q701
C701
C702
C702
X701
1
2
5
15
20
25
29
29
30
10
CN702
IC710
C731
C735
C732
C736
C737 C738 C739 C740 C741
R717
FB703
R777
R715
R714
R712
R776
R720
R731
R782
R781
R780
R781
R780
R779
R778
C729
C733
C851
C851
C753
C755
C755
R762
R761
R760
C734
FB702
FB704
JC739
1
5
7
14
10 8
IC851
1
5
7
14
10
8
IC852
1
5
15
20
10
11
IC853
1
5
8
16
15
10
9
IC780
D782
JC746
JC723
Q702
T701
P701
1
5
10
15
20
22
CN701
USB
CONNECTOR
R748
R747
R924
R925
R750
R749
C852
C756
C853
D781
C754 C752 C751
C728
C804
TP2
1
25
24
15
20
48 45
40
30
35
5
10
IC752
1
25
24
15
20
48 45
40
30
35
5
10
IC510
1
25
24
15
20
48
45
40
30
35
5
10
IC751
1
5
10
15 13
20
24
25
30
35
36
37 40
45 48
12
IC810
R801
R802
R805 R804 R814
C801
C617
C808
C802
C803
C758
X801
D783
R806
R926
R812
R813
R811
R810
R702
JC704
TP3
SL701
(TEST)
TP701
Q833
Q831
Q832
IC820
1
2
3
4
5
C616
C807
G
S
D
2
3
4
5
6
7
8
A
1
B
C
D
E
F
G
H
A
POWER BOARD
CN704
(Page 24)
12
(12)
1-678-089-
12
(12)
1-678-089-
ECB
*
MAIN BOARD (SIDE B)
MAIN BOARD (SIDE A)
*
Replacement of IC710 used in the set requires a spe-
cial tool.
cial tool.
• Lead Layouts
surface
Ver 1.1 2000.07
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