Read Sony NWZ-A726 / NWZ-A726B / NWZ-A728 / NWZ-A728B / NWZ-A729 Service Manual online
13
NWZ-A726/A726B/A728/A728B/A729
4-2-9. Sound pressure regulation level check
“1 kHz 0 dBs L-ch/R-ch VOLUME: 30” audio signal is output-
ted.
“1 kHz 0 dBs L-ch/R-ch VOLUME: 30” audio signal is output-
ted.
Checking method:
1. Enter the test mode.
2. Press
1. Enter the test mode.
2. Press
the
[
v
]/[
V
] key to select the “AUDIO”, and press the [
B
]
key to enter the minor item.
3. Press the [
v
]/[
V
] key to select the “SPCHK”.
4. Press the [
u
] key, “1 kHz 0 dBs L-ch/R-ch VOLUME: 30”
audio signal is outputted.
liquid crystal display
AUDIO SPCHK
1kHz 0dBs L/Rch
HPOUT [ VOL: 30 ]
START
5. Press the [BACK] key, return to minor item selection screen.
4-3. Video
liquid crystal display
MPTAPP MENU
POWER
AUDIO
AUDIO
VIDEO — LCD
OTHER
CLESTE
DAC
SHUTDOWN
EXITTEST
CLESTE
DAC
SHUTDOWN
EXITTEST
4-3-1. LCD display check
Liquid crystal display is checked.
Liquid crystal display 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 “VIDEO”, and press the [
B
]
key to select the “LCD”.
3. Press
the
[
u
] key, all black is displayed on the liquid crystal
display.
4. In this state, each time the [OPTION] key is pressed, the screen
display changes in the following order.
All black (default)
→ All red → All green → All blue → All
white
→ Color bar → Maximum drawing size confi rmation
→ diagonal gradation (red) → diagonal gradation (green) →
diagonal gradation (blue)
diagonal gradation (blue)
→ diagonal gradation (white)
Maximum drawing size confi rmation:
All blue (All sides are red) is displayed. Whether red in all
All blue (All sides are red) is displayed. Whether red in all
sides is seen is confi rmed.
5. In this state, each time the [VOL –] key is pressed, LCD back
light brightness min/max/middle switch is performed.
6. Press the [BACK] key, return to minor item selection screen.
4-4. Other
liquid crystal display
MPTAPP MENU
POWER
AUDIO
VIDEO
OTHER
AUDIO
VIDEO
OTHER
CLOCK
CLESTE
KEY
DAC
KETYNUM
SHUTDOWN
FORMAT
EXITTEST DEST
SPSET
FWVER
NCAPCHK
4-4-1. Clock check
The movement of an internal clock is confi rmed.
The movement of an internal clock is confi rmed.
Checking method:
1. Enter the test mode.
2. Press
1. Enter the test mode.
2. Press
the
[
v
]/[
V
] key to select the “OTHER”, and press the [
B
]
key to enter the minor item.
3. Press the [
v
]/[
V
] key to select the “CLOCK”.
4. Press the [
u
] key, date and time are displayed.
liquid crystal display
OTHER CLOCK
XX, XX XX XXXX
##:##:##.######
START
XX, XX XX XXXX : Date
##:##:##.######
##:##:##.######
: Time
“START” changes into “OK” if the movement of an internal
clock is confi rmed.
5. Press the [BACK] key, return to minor item selection screen.
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