Sony NW-ZX300 Service Manual page 36

NW-ZX300/ZX300A
3. CONFIGURATION OF THE TEST MODE
Major item
[u] key or [.] key or
[>] key [HOLD] switch on
Minor item
[u] key
Start [HOLD] switch on
Automatic
Finish
or
Result
4. OPERATION OF THE TEST MODE
4-1. Power (Power)
Screen display
Diagnosis APP
[ver X.XX.XX]
Voltage check
Current check
DeepSleep check
Charge check
Battery voltage
Battery status
Thermistor check
4-1-1. Power supply voltage check (Voltage check)
It can be check the power supply voltage in the state where all
power supply lines are starting.
Procedure:
1. Enter the test mode.
(Refer to "1. SETTING THE TEST MODE" on page 35)
2. Press the [+]/[–] keys to select the "Power", and press the [
or [ ] key to enter the minor item.
>
3. Press the [+]/[–] keys to select the "Voltage check".
4. Press the [ ] key, power supply voltage check screen is dis-
u
played.
Screen display
Power V check
(POW VCHK command)
>>> STOP
5. Press the [ ] key, all power supply lines are started.
u
6. In step 5 state, the power supply voltage of each power supply
line can be confi rmed by measuring the voltage.
7. Slide the [HOLD] switch in the direction of on, to return to
minor item selection screen.
36
Major item switching:
/
[+] [–] keys
Minor item switching:
/
[+] [–] keys
Power
4-1-2. Consumption current (audio playback) check
(Current check)
It can be check the consumption current (audio playback) in the
state where audio signal is outputted of the "Sampling rate: 44.1
kHz/Frequency: 1 kHz (L/R-ch)/Bit rate: 16 bit".
Procedure:
1. Enter the test mode.
(Refer to "1. SETTING THE TEST MODE" on page 35)
2. Press the [+]/[–] keys to select the "Power", and press the [
or [ ] key to enter the minor item.
>
3. Press the [+]/[–] keys to select the "Current check".
4. Press the [ ] key, consumption current check screen is dis-
u
played.
Key input settings under this mode of operation:
[+]/[–] : Volume up/down
[ ] : Backlight switching (on/off)
>
[ ] : Output switching
.
(SE (headphone)/BTL (balanced)/
LO (line out))
[ ] : Audio signal output (10 seconds)
u
5. In step 4 state, check the audio playback consumption current.
6. Slide the [HOLD] switch in the direction of on, to return to
minor item selection screen.
]
u
Screen display
Power A check
(POW ACHK command)
1kHz 0dBs L/Rch
o u t p u t : SE
volume: 90
display: 255
]
u