NW-HD1 - Sony Audio Service Manual (repair manual). Page 12

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12
NW-HD1
5-2-6. SOUND EQ check
“100 Hz/250 Hz/630 Hz/1.6 kHz/4 kHz/10 kHz   –20 dBs   L-ch/R-
ch” audio signal is outputted.
Checking method:
1. Enter the audio test mode.
2. Press the 
 
 key to display major item, and press the  
M   m
key to select the “AUDIO”.
3. Press the 
 
 key to display minor item, and press the  
M   m
key to select the “EQ 1”.
4. Press the 
 Bx 
 key, “START” is displayed and “100 Hz   –20 dBs
L-ch/R-ch” audio signal is outputted. In this state, Each time [MODE]
key is pressed, EQ MAX/MIN switch is performed.
5. Press the [SET UP] key, return to minor item selection screen.
6. Press the  
M   m   key to select the “EQ 2”.
7. Press the 
 Bx 
 key, “START” is displayed and “250 Hz   –20 dBs
L-ch/R-ch” audio signal is outputted. In this state, Each time [MODE]
key is pressed, EQ MAX/MIN switch is performed.
8. Press the [SET UP] key, return to minor item selection screen.
9. Press the  
M   m   key to select the “EQ 3”.
10. Press the 
 Bx 
 key,  “START” is displayed and “630 Hz   –20 dBs
L-ch/R-ch” audio signal is outputted. In this state, Each time [MODE]
key is pressed, EQ MAX/MIN switch is performed.
11. Press the [SET UP] key, return to minor item selection screen.
12. Press the  
M   m   key to select the “EQ 4”.
13. Press the 
 Bx 
 key, “START” is displayed and “1.6 kHz   –20
dBs   L-ch/R-ch” audio signal is outputted. In this state, Each
time [MODE] key is pressed, EQ MAX/MIN switch is performed.
14. Press the [SET UP] key, return to minor item selection screen.
15. Press the  
M   m   key to select the “EQ 5”.
16. Press the 
 Bx 
 key, “START” is displayed and “4 kHz   –20 dBs   L-
ch/R-ch” audio signal is outputted. In this state, Each time [MODE]
key is pressed, EQ MAX/MIN switch is performed.
17. Press the [SET UP] key, return to minor item selection screen.
18. Press the  
M   m   key to select the “EQ 6”.
19. Press the 
 Bx 
 key, “START” is displayed and “10 kHz   –20 dBs
L-ch/R-ch” audio signal is outputted. In this state, Each time [MODE]
key is pressed, EQ MAX/MIN switch is performed.
20. Press the [SET UP] key, return to minor item selection screen.
5-2-7. BEEP check
BEEP sound is outputted.
Checking method:
1. Enter the audio test mode.
2. Press the 
 
 key to display major item, and press the  
M   m
key to select the “AUDIO”.
3. Press the 
 
 key to display minor item, and press the  
M   m
key to select the “BEEP”.
4. Press the 
 Bx 
 key, “START” is displayed and BEEP sound is
outputted.
5. Press the [SET UP] key, return to minor item selection screen.
5-2-8. Sound pressure regulation level check
“1 kHz   0 dBs   L-ch/R-ch” audio signal is outputted.
Checking method:
1. Enter the audio test mode.
2. Press the 
 
 key to display major item, and press the  
M   m
key to select the “AUDIO”.
3. Press the 
 
 key to display minor item, and press the  
M   m
key to select the “SPL”.
    AUDIO
LCD display
    EQ 1
LCD display
    START
LCD display
    EQ 2
LCD display
    START
LCD display
    EQ 3
LCD display
    START
LCD display
    EQ 4
LCD display
    START
LCD display
    EQ 5
LCD display
    START
LCD display
    EQ 6
LCD display
    START
LCD display
    AUDIO
LCD display
    BEEP
LCD display
    START
LCD display
    AUDIO
LCD display
    SPL
LCD display
Ver 1.1
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