Sony NW-ZX300 Service Manual page 37

4-1-3. Standby current check (DeepSleep check)
It can be check the standby current.
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 "DeepSleep check".
4. Press the [ ] key, enter the state of the deep sleep.
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(Screen display is turned off)
5. In step 4 state, check the measuring the consumption current in
standby.
6. Sleep is released by pressing any key (button) of WALKMAN
main unit.
Screen display
Power DeepSleep
(POW DSVC command)
idle state
7. Slide the [HOLD] switch in the direction of on, to return to
minor item selection screen.
4-1-4. Charge current check (Charge check)
It can be check the charge current.
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 "Charge check".
4. Press the [ ] key, charge setting screen is displayed.
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Screen display
Power Charge check
(POW CHGC command)
AC
>>> ---
5. In step 4 state, each time the [
the charge state will change in order of "AC" y "0mA" y
"500mA", and will refl ected the settings that were changed by
pressing the [
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AC : The charging current check from WM-PORT pin 20
(DC IN).
]
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0mA : The charging current check from WM-PORT pin 11
(VBUS). 0 mA of charging current.
500mA : The charging current check from WM-PORT pin 11
(VBUS). 500 mA or less of charging current.
6. Slide the [HOLD] switch in the direction of on, to return to
minor item selection screen.
4-1-5. Battery voltage detection check (Battery voltage)
It can be check the battery voltage.
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 "Battery voltage".
4. Press the [ ] key, the battery voltage is displayed.
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(Displayed value in the following fi gure is example)
]
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5. In step 4 state, each time the [
voltage value is updated.
6. Slide the [HOLD] switch in the direction of on, to return to
minor item selection screen.
4-1-6. Battery insertion and removal check
(Battery status)
Note: Not used for the servicing.
4-1-7. Thermistor voltage check (Thermistor check)
Note: Not used for the servicing.
NW-ZX300/ZX300A
]/[ ] key is pressed,
. >
] key.
Screen display
Power Battery check
(POW BATT command)
3.939V
] key is pressed, the battery
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]
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