Sony NW-MS7 Service Manual page 13
Portable memory stick player
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Also See for NW-MS7:
- Operating instructions manual (48 pages) ,
- Specifications (2 pages) ,
- Basic manual (2 pages)
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STEP
Test item
C
Channel balance (XP)
Channel separation
D
(L) IN > (R) OUT
Channel separation
E
(R) IN > (L) OUT
F
Noise level (XP)
10
Distortion factor (XP)
11
Maximum output (XP)
12
AVLS LEVEL (XP)
13
AVLS releasing (XP)
14
Vol. setting (XP)
15
MEGA BASS 1 (XP)
16
MEGA BASS 2 (XP)
MEGA BASS releasing (XP) Test 17
17
BATT low voltage detection Test 18
18
BATT Reference voltage
19
detection
1A
Lo DC IN detection
1B
Hi DC IN detection
1C
STOP current
1D
PLAY current (XP)
1E
USB response check
1F
Standby current
20
Setting initialization
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.
Test No.
Test item
Display
display
Test ¢C
SoundTest
Test ¢D
SoundTest
Test ¢E
SoundTest
Test ¢F
SoundTest
Test 1¢
SoundTest
Test 11
VOL MAX
Test 12
AVLS ON
Test 13
AVLS OFF
Test 14
VOL –4¢dB
Test 15
MEGA BASS 1
Test 16
MEGA BASS 2
MEGA BASS OF
Wait LowBatt
Test 18
Wait Batt2
Test 1A
Wait LowDC
Test 1B
Wait HighDC
Test 1C
STOP
Test 1D
PLAY
Test 1E
USB
Test 1F
Test 2¢
E2P INIT
– 13 –
Description of the test
1 kHz (0 dB) in the test memory stick is played back.
L: 1 kHz (0 dB) reference/R: mute in the test memory stick
is played back (XP mode).
L: mute/R: 1 kHz (0 dB) reference in the test memory stick
is played back (XP mode).
Mute signal in the test memory stick is played back.
1 kHz (0 dB) reference in the test memory stick is played
back.
Vol. is set to MAX. (0 dB)
AVLS is set ON.
AVLS is set OFF.
100 Hz reference in the test memory stick is played back
and the headphone output is set to –40 dB (Vol. 03).
The mode is set to MEGA BASS 1 mode.
The mode is set to MEGA BASS 2 mode.
MEGA BASS is set OFF.
When a low voltage (3.35 V or Less) condition is detected
(BATT), the backlight turns on.
1 Backlight off t 2 When the BATT voltage is at the
reference voltage, the backlight turns on.
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
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.
1 Backlight off t 2 STOPPED state
The set is in PLAY mode 0.1 mW (Approx. 0.08 mW for vol.
11 and approx. 0.12 mW for vol. 12)
5 V is applied to Vbus and potential variations at D+/D– or
crystal oscillations are verified for this check.
Forces the set to be in the sleeping state.
The destination information is set again and the volume,
BASS and other equipment setting information are initialized.
Test MS
playback
track
008
009
010
011
001
001
001
001
012
012
012
012
001
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