Read Sony NW-MS7 Service Manual online
– 13 –
Test No.
Test item
Test MS
STEP
Test item
Display
display
Description of the test
playback
track
C
Channel balance (XP)
Test ¢C
SoundTest
1 kHz (0 dB) in the test memory stick is played back.
008
D
Channel separation
Test ¢D
SoundTest
L: 1 kHz (0 dB) reference/R: mute in the test memory stick
009
(L) IN > (R) OUT
is played back (XP mode).
E
Channel separation
Test ¢E
SoundTest
L: mute/R: 1 kHz (0 dB) reference in the test memory stick
010
(R) IN > (L) OUT
is played back (XP mode).
F
Noise level (XP)
Test ¢F
SoundTest
Mute signal in the test memory stick is played back.
011
10
Distortion factor (XP)
Test 1¢
SoundTest
1 kHz (0 dB) reference in the test memory stick is played
001
back.
11
Maximum output (XP)
Test 11
VOL MAX
Vol. is set to MAX. (0 dB)
001
12
AVLS LEVEL (XP)
Test 12
AVLS ON
AVLS is set ON.
001
13
AVLS releasing (XP)
Test 13
AVLS OFF
AVLS is set OFF.
001
14
Vol. setting (XP)
Test 14
VOL
–
4¢dB
100 Hz reference in the test memory stick is played back
012
and the headphone output is set to –40 dB (Vol. 03).
15
MEGA BASS 1 (XP)
Test 15
MEGA BASS 1
The mode is set to MEGA BASS 1 mode.
012
16
MEGA BASS 2 (XP)
Test 16
MEGA BASS 2
The mode is set to MEGA BASS 2 mode.
012
17
MEGA BASS releasing (XP)
Test 17
MEGA BASS OF
MEGA BASS is set OFF.
012
18
BATT low voltage detection
Test 18
Wait LowBatt
When a low voltage (3.35 V or Less) condition is detected
(BATT), the backlight turns on.
19
BATT Reference voltage
Test 18
Wait Batt2
1
Backlight off
t
2
When the BATT voltage is at the
detection
reference voltage, the backlight turns on.
1A
Lo DC IN detection
Test 1A
Wait LowDC
1
Backlight off
t
2
When the AC adaptor voltage is found
to be lower (4.65 V or Less), the backlight turns on.
1
Backlight off
t
2
When the AC adaptor voltage is found
1B
Hi DC IN detection
Test 1B
Wait HighDC
to be lower, the backlight turns on. When the AC adaptor
voltage is found to be higher (6.0 V or more), the backlight
turns on.
1C
STOP current
Test 1C
STOP
1
Backlight off
t
2
STOPPED state
1D
PLAY current (XP)
Test 1D
PLAY
The set is in PLAY mode 0.1 mW (Approx. 0.08 mW for vol.
001
11 and approx. 0.12 mW for vol. 12)
1E
USB response check
Test 1E
USB
5 V is applied to Vbus and potential variations at D+/D– or
crystal oscillations are verified for this check.
1F
Standby current
Test 1F
Forces the set to be in the sleeping state.
20
Setting initialization
Test 2¢
E2P INIT
The destination information is set again and the volume,
BASS and other equipment setting information are initialized.
Returns to step 0.
Notes: 1. The RAM test in STEP-1 is performed just when the TEST MODE is entered.
2. SP mode: 105 kbps, XP mode: 132 kbps
3. Each track is played back once to playback the test MS in each step. The data is not played back continuously.
3. Each track is played back once to playback the test MS in each step. The data is not played back continuously.
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