Sony NWZX1061FBLK - Walkman 32 GB Portable Network Audio Player Service Manual page 7

Note: Refer to page 27 for the schematic diagram. Refer to page
28 for the printed wiring boards.
METHOD OF JUDGING RIGHT AND WRONG OF
PARTS RELATED TO SWITCH
In this set, only a part of parts that relate to the switch are supplied.
Exchange the entire mounted board when parts that do not corre-
spond to it are defective.
The right and wrong of the switch can be judged by the following
two methods.
1. Judgment From The Test Mode
Judge the right and wrong of the switch referring to "4-4-2. Key
check" (page 22).
2. Judgment from the voltage measurement
Judge the right and wrong of the switch by the voltage measure-
ment with a test point.
2-1. [ ]/[ ]/[ ] keys
u > .
Connection:
CL881 (KEY_AD0)
CL885 (GND)
When the voltage value is below, [u]/[>]/[.] keys are
normal.
• [u] key is pressed : 0 to 0.25 V
• [>] key is pressed : 0.4 to 0.6 V
• [.] key is pressed : 0.76 to 0.95 V
2-2. [VOL +]/[VOL –]/[HOME] keys
Connection:
CL882 (KEY_AD1)
CL885 (GND)
When the voltage value is below, [VOL +]/[VOL –]/[HOME] keys
are normal.
• [VOL –] key is pressed : 0 to 0.25 V
• [VOL +] key is pressed : 0.4 to 0.6 V
• [HOME] key is pressed : 0.76 to 0.95 V
2-3. HOLD switch (S881)
Connection:
S881 (HOLD SW pin 2)
CL885 (GND)
When the voltage value is below, HOLD switch (S881) is normal.
• HOLD switch is turned on : 2.85 V
• HOLD switch is turned off : 0 V
digital voltmeter
+
–
digital voltmeter
+
–
digital voltmeter
+
–
NWZ-X1050/X1051/X1060/X1061
Connection location:
– MAIN Board (Side B) –
S881
(HOLD SW)
2
S881
1
CL882
CL885
(KEY_AD1)
(GND)
CL881
(KRY_AD0)
7