Sony NWZ-E343 / NWZ-E344 / NWZ-E345 Service Manual ▷ View online
NWZ-E343/E344/E345
13
2-6. KEY BOARD
Note:
This illustration sees the top block from back cover side.
2-7. BATTERY ASSY (BAT1)
Note 1:
This illustration sees the battery block from battery side.
2 Remove four solders.
1
3 KEY board
KEY board
back cover
VOL SW assy
Check the plate position when
KEY board is installed.
KEY board is installed.
Front side view:
Note 2: Metal measure etc. are inserted
and battery assy is removed.
1 Remove two solders of
battery
cable.
LCD block
2
metal measure
5
battery assy
(BAT1)
4
two sheets battery
3
red
black
NWZ-E343/E344/E345
14
2-8. TOP COVER
Note: This illustration sees the LCD block from MAIN board side.
2-9. VOL SW ASSY (VSW1)
Note: This illustration sees the chassis block from MAIN board side.
3 top cover
2
1 two screws
(1.4
u2.5)
chassis block
MAIN board
3 VOL SW assy
(VSW1)
2
1 Remove two solders.
MAIN board
NWZ-E343/E344/E345
15
2-10. MAIN BOARD, LCD ASSY (LCD1)
Note 1: This illustration sees the chassis block from MAIN board side.
6
8 LCD holder
1 Remove two solders of
VOL SW assy.
7 MAIN board block
2 cushion
9 LCD connector
0 MAIN board
3 two screws
(M1.7
u3.0)
5 screw
(M1.4
u2.0)
4 guard
qa LCD cushion
qs LCD assy (LCD1)
MAIN board
VOL SW assy
Note 2: This illustration sees the MAIN board block from LCD side.
Note 3: When the MAIN board is replaced, refer to “NOTE THE
MAIN BOARD REPLACING” (page 3) in servicing notes.
NWZ-E343/E344/E345
16
SECTION 3
TEST MODE
Note: Information on the test mode must correspond in enough
security. When the leakage has been revealed by any
chance, the source of information is specifi ed.
chance, the source of information is specifi ed.
1. SETTING THE TEST MODE
Note: Perform the test mode in the state of 3.6 V or more in the battery
voltage.
Setting method:
1. Turn the power on.
2. Press the [BACK] key for 1.5 seconds or more, the home menu
1. Turn the power on.
2. Press the [BACK] key for 1.5 seconds or more, the home menu
is displayed.
3. Slide the [HOLD] key to set the hold on.
4. While pressing the [OPTION] key, press the key as following
4. While pressing the [OPTION] key, press the key as following
order.
[BACK]
→ [
v
]
→ [
B
]
→ [
V
]
→ [
b
]
→ [
v
]
→ [
B
]
→ [
V
]
→
[
b
]
→ [
u
]
5. Enter the test mode.
2. RELEASING THE TEST MODE
1. Display the major item selection screen.
2. Press
1. Display the major item selection screen.
2. Press
the
[
v
]/[
V
] key to select the “EXIT”, and press the [
B
]
key to select the “SURE?”.
3. Press the [
u
] key, TURN the POWER off and release the test
mode.
3. CONFIGURATION OF THE TEST MODE
<>
key
Major item
Major item switching:
<>/<>
key
<#"$,>
key
Minor item
Finish
or
Result
Start
Automatic
V
<>
key
<>
key
#
C
W 7
Minor item switching:
<>/<>
key
W 7
4. OPERATION OF THE TEST MODE
4-1. Power
4-1. Power
liquid crystal display
MPTAPP MENU
POWER
VCHK
AUDIO
ACHK
VIDEO
DSVCHK
OTHER
CHGCHK
DEVICE
BATTCHK
REC
FM
SHUTDN
EXIT
FM
SHUTDN
EXIT
4-1-1. Power supply voltage check
This mode is used in case power supply voltage in the state where
all power supply lines are starting is checked.
This mode is used in case power supply voltage in the state where
all power supply lines are starting is checked.
Checking method:
1. Enter the test mode.
2. Press
1. Enter the test mode.
2. Press
the
[
v
]/[
V
] key to select the “POWER”, and press the
[
B
] key to enter the minor item.
3. Press the [
v
]/[
V
] key to select the “VCHK”.
4. Press the [
u
] key, all power supply lines are started.
liquid crystal display
VCHK
VDDIO : X.XXXV
VDDA : X.XXXV
VDDD : X.XXXV
In this state, the power supply voltage of each power supply
line can be confi rmed by measuring the voltage.
line can be confi rmed by measuring the voltage.
5. Press the [BACK] key, return to minor item selection screen.
4-1-2. Consumption current (audio playback) check
This mode is used in case consumption current (audio playback)
is checked in the state where “1 kHz 0 dBs L-ch/R-ch VOLUME:
15” audio signal is output.
This mode is used in case consumption current (audio playback)
is checked in the state where “1 kHz 0 dBs L-ch/R-ch VOLUME:
15” audio signal is output.
Checking method:
1. Enter the test mode.
2. Press
1. Enter the test mode.
2. Press
the
[
v
]/[
V
] key to select the “POWER”, and press the
[
B
] key to enter the minor item.
3. Press the [
v
]/[
V
] key to select the “ACHK”.
4. Press the [
u
] key, “1 kHz 0 dBs L-ch/R-ch VOLUME: 15”
audio signal is output.
liquid crystal display
ACHK
1kHz 0dBs L/Rch
HPOUT [ VOL 15 ]
BL ON
5. In this state, each time the [OPTION] key is pressed, LCD
back light on /off switch is performed.
6. Press the [BACK] key, return to minor item selection screen.
Click on the first or last page to see other NWZ-E343 / NWZ-E344 / NWZ-E345 service manuals if exist.