NW-MS9 - Sony Audio Service Manual (repair manual). Page 10

10

Checking consumed electric current is one of the items to check. Connect an ammeter before setting the test mode.
(Refer to the following figure)

There are following two methods of entering the test mode.
Method 1:
Short the short lands (SL0120) on the MAIN board with a solder bridge, then turn on the power.
Method 2:
Turn on the power with the 

[HOLD]

 switch OFF. If the set is left as it is, the LCD display becomes on, and after for a while, it changes into

the sleep status (LCD off). Before the status of the display changes into the sleep status, turn ON the 

[HOLD]

 switch and press 

Hs

t

[MEGA BASS]

 

t

Hs

t 

[VOLUME--]

 

t

Hs

t 

[VOLUME+]

 keys in this order.

There are following two methods of releasing the test mode.
In case of enter the test mode with the method 1:
Turn off the power and open the solder bridge on the short lands (SL0120) on the MAIN board.
In case of enter the test mode with the method 2:
Turn off the power.

R6901

R6902

C8004

C8509

R6903

R5001

R5003

C8008

R6018

R6027

R6028

R6035

R6037

C8016

C8014

C

R5002

R9015

C9007

R8103

R9019

R8102

R8607

R8104

R8608

R8105

R8110

C8006

1

L9007

IC8000

IC5000

X8000

56

43

SL0120

120 119 117 113 109 108 105 102 99

96 93

1

118 116 114 110 107 104 101 98

95 92

3

2 115 112 111 116 103 100 97

94 91

5

6

4

82

9

8

7

79

12

11 10

76

15

14 13

73

18

17 16

70

20

21 19

67

24

23 22

66

25

26 27

34

37

40 43 46

49

52 61

24

28 32

35

38

41 45 47

50

53 55

30

31 33

36

39

42 44 48

51

54 56

17

25

33

41

18

26

34

42

19

27

35

43

20

28

36

44

21

29

37

45

22

30

38

46

23

31

39

47

24

32

40

48

battery terminal (+)

battery terminal 

(–)

SL0120

+

–

ammeter

1.23Vdc

+

–

regulated dc

power supply