Read Sony NW-A1200 Service Manual online
9
NW-A1200
SECTION 4
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 specified.
When the leakage has been revealed by any chance, the source of
information is specified.
1. BASAL CONDITION OF THE TEST MODE
Power supply voltage : 3.80 to 4.20 V
Volume
Volume
: 27
SOUND EQ
: OFF
AVLS
: OFF
HOLD
: OFF
Set states
: horizontal, playback stop
2. SETTING THE TEST MODE
Setting method:
1. Turn the power on.
2. Press the [HOLD] key to set the hold on.
3. While pressing the [LINK] key, press the key as following
2. Press the [HOLD] key to set the hold on.
3. While pressing the [LINK] key, press the key as following
order.
[ ]
v
→
[ ]
V
→
[OPTION]
→
[ ]
v
→
[ ]
V
→
[ ]
B
→
[ ]
b
→
[ ]
B
→
[ ]
b
→
[ ]
b
→
[ ]
u
→
[OPTION]
4. Press the [HOLD] key to set the hold off and enter the test
mode.
3. RELEASING THE TEST MODE
Press the [BACK] key for 1.5 seconds or more, turn the power off
and release the test mode.
and release the test mode.
4. CONFIGURATION OF THE TEST MODE
5. OPERATION OF THE TEST MODE
5-1. Power
5-1-1. Power supply voltage check
5-1. Power
5-1-1. Power supply voltage check
This mode is used in case power supply voltage in the state where
all power supply lines (1.10 V/1.3 V/1.8 V/3.0 V/3.0 V (VSTBY)/
3.3 V/5.0 V) are starting is checked.
all power supply lines (1.10 V/1.3 V/1.8 V/3.0 V/3.0 V (VSTBY)/
3.3 V/5.0 V) are starting is checked.
Checking method:
1. Enter the test mode.
2. Press the [ ]
2. Press the [ ]
B
key to display major item, and press the [ ]
v
/ [ ]
V
key to select the “POWER”.
EL display
POWER
3. Press the
[ ]
B
key to display minor item, and press the [ ]
v
/ [ ]
V
key to select the “V CHK”.
EL display
V CHK
4. Press the
[ ]
u
key, “START” is displayed and all power supply
lines are started.
EL display
START
In this state, the power supply voltage of each power supply line
can be confirmed by measuring the voltage of the following
points.
points.
Specified Value:
TP9027: 1.10
±
0.05 V
TP9023: 1.3
±
0.1 V
TP9026: 1.8
±
0.1 V
TP9031: 3.0
±
0.1 V
TP9018: 3.0
±
0.1 V
TP9028: 3.3
±
0.1 V
TP9024: 5.0
±
0.2 V
5. Press the
[OPTION]
key, “HD ON” or “HD OFF” is displayed.
In this state, each time
[OPTION]
key is pressed, hard disk drive
power supply on/off switch is performed.
EL display
HD ON
6. Press the [BACK]
key, return to minor item selection screen.
[ ]
key
F/W version display
Major item
Major item switching:
[ ]
/
[ ]
key
[BACK]
key
Minor item
Finish
or
Result
Start
Automatic
u
[ ]
key
[ ]
key
B
b
[ ]
key
[ ]
key
B
b
v
V
Minor item switching:
[ ]
/
[ ]
key
v
V
TP9024
(5.0V)
TP9027
(1.10V)
TP9028
(3.3V)
TP9018
(VSTBY)
TP9026
(1.8V)
TP9023 (1.3V)
TP9031
(3.0V)
– MAIN Board (Component Side) –
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