Sony Walkman NW-MS6, Руководство по обслуживанию

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10
NW-MS6
SECTION 4
TEST MODE
[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)
[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:
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
[]
keys in this order.
[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.
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
– MAIN BOARD (Conductor Side) –
battery terminal (+)
battery terminal
(–)
SL0120
+
–
ammeter
1.23Vdc
+
–
regulated dc
power supply