Test Mode - Sony NW-MS9 Service Manual

NW-MS9
[Preparation]
Checking consumed electric current is one of the items to check. Connect an ammeter before setting the test mode.
(Refer to the following figure)
– MAIN BOARD (Conductor Side) –
battery terminal (+)
SL0120
[Setting the Test Mode]
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:
[HOLD]
Turn on the power with the
the sleep status (LCD off). Before the status of the display changes into the sleep status, turn ON the
[MEGA BASS]
t t
Hs
[Releasing the Test Mode]
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.
10
SECTION 4

TEST MODE

43
R9015
SL0120
R6901 R6902
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
IC5000
1
switch OFF. If the set is left as it is, the LCD display becomes on, and after for a while, it changes into
[VOLUME--] [VOLUME+]
t t
Hs
ammeter
+
–
battery terminal
56
C9007
R8103
120 119 117 113 109 108 105 102 99 96 93
R9019 R8102
1 118 116 114 110 107 104 101 98 95 92
R8607
3 2 115 112 111 116 103 100 97 94 91
5 6 4
R8104
9 8 7
R8608
12 11 10
R8105 IC8000
15 14 13
C8006 R8110
18 17 16
20 21 19
24 23 22
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
C8004 C8509 R6903
keys in this order.
regulated dc
power supply
+
–
1.23Vdc
(–)
82
79
76
73
70
67
66
[HOLD]
switch and press
t
Hs