NWZ-E435F/E436F/E438F
5
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 sup-
plied.
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 “4-4-3. Key
check” (page 16).
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. RESET key (SW1)
Connection:
When the voltage value is below, RESET key (SW1) is nomal.
•
RESET key (SW1) is pressed
: 0 V
•
RESET key (SW1) is not pressed : 3.1 V
2-2. HOLD switch (SW610)
Connection:
When the voltage value is below, HOLD switch (SW610) is
nomal.
•
HOLD switch (SW610) is turned on : 0 V
•
HOLD switch (SW610) is turned off : 3.1 V
2-3. [
u
]/[
B
]/[
b
]/[
v
]/[
V
]/[BACK]/[OPTION]/[VOL +]/[VOL –]
keys
Connection:
When the voltage value is below, [
u
]/[
B
]/[
b
]/[
v
]/[
V
]/[BACK]
[OPTION]/[VOL +]/[VOL –] keys are nomal.
•
Keys are not pressed
: 3.1 V
• [
u
] key (SW605) is pressed
: 1.35 to 1.53 V
• [
B
] key (SW606) is pressed
: 1.71 to 1.85 V
• [
b
] key (SW607) is pressed
: 2.03 to 2.15 V
• [
v
] key (SW608) is pressed
: 2.36 to 2.46 V
• [
V
] key (SW609) is pressed
: 2.69 to 2.85 V
•
[BACK] key (SW604) is pressed
: 1.09 to 1.20 V
•
[VOL –] key is pressed
: 0.12 to 0.40 V
•
[VOL +] key was pushed
: 0.68 to 0.95 V
+
–
digital voltmeter
R1
T8 (FM_GND)
+
–
digital voltmeter
J601 pin
J601 pin
+
–
digital voltmeter
D2 (anode)
J4 pin
2-4. OPTION key (SW601)
Connection:
When the voltage value is below, OPTION key (SW601) is
nomal.
•
OPTION key (SW601) is pressed
: 0 V
•
OPTION key (SW601) is not pressed : 3.1 V
Connection location:
J4
1
2
29
T8 (FM_GND)
R1
2
4
1
30
29
9
J601
30
D2
– MAIN Board (Side A) –
– MAIN Board (Side B) –
– KEY Board (Side B) –
+
–
digital voltmeter
J601 pin
J601 pin
Note:
Refer to page 20 for the schematic diagram.
Refer to page 19 for the printed wiring boards.
