Test Mode - Sony NWZ-A826 Service Manual

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.
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
is displayed.
3. Slide the [HOLD] key to set the hold on.
4. While pressing the [OPTION] key, press the key as following
order.
] → [ ] → [ ] → [ ] → [
[
v v V V
] → [ ] → [
[ ]
V B u
5. The set reboots when the [HOLD] key is slided to set the hold
off, and the color bar is displayed in the liquid crystal display.
6. Enter the test mode when the [BACK] key is pressed in the
state of step 5.
Note: The destination setting and sound pressure regulation setting can-
not be executed by this test mode.
2. RELEASING THE TEST MODE
1. Display the major item selection screen.
2. Press the [ ]/[ ] key to select the "EXITTEST", and press the
v V
[ ] key to select the "SURE ?".
B
3. Press the [ ] key, turn the power off and release the test
u
mode.
3. CONFIGURATION OF THE TEST MODE
Major item
key
Minor item
key
Start
Automatic
Finish
or
Result
4. OPERATION OF THE TEST MODE
4-1. Power
liquid crystal display
MPTAPP MENU
POWER VCHK
AUDIO ACHK
VIDEO DSVCHK
OTHER CHGCHK
CLESTE BATTCHK
DAC
BLUETOOTH
SHUTDOWN
EXITTEST
SECTION 4

TEST MODE

] → [ ] → [ ] → [ ] → [
B b v V v
Major item switching:
/
key
key
Minor item switching:
/
key
key
NWZ-A826/A826K/A828/A828K/A829
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.
Checking method:
1. Enter the test mode.
2. Press the [ ]/[
v V
[ ] key to enter the minor item.
B
3. Press the [ ]/[
v V
4. Press the [ ] key, all power supply lines are started.
u
liquid crystal display
] →
POWER VCHK
START
In this state, the power supply voltage of each power supply
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 outputed.
Checking method:
1. Enter the test mode.
2. Press the [ ]/[
v V
[ ] key to enter the minor item.
B
3. Press the [ ]/[
v V
4. Press the [ ] key, "1 kHz 0 dBs L-ch/R-ch VOLUE: 15"
u
audio signal is outputed.
liquid crystal display
POWER ACHK
1kHz 0dBs L/Rch
HPOUT [ VOL: 15 ]
START
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.
] key to select the "POWER", and press the
] key to select the "VCHK".
] key to select the "POWER", and press the
] key to select the "ACHK".
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