Power On/Off - LG GD910 Service Manual

3.4. Power ON/OFF

Remote Power & Side Key
PWRON
KP_OUT(0)
KP_IN(6)
Voltage level of PWRON pin is high before push the END_KEY button.
If push the END_KEY button, voltage level of PWRON pin is changed from high to low.
ON_OFF1 is a power-on input for SM-POWER3 with active low edge.
ON_OFF2 is for power off alarm clock.
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Only for training and service purposes
6 5 4
R320
47K
VBAT
R317
1 2 3
10K
R318
100K
2
1
2SA2030
3
Q300
[Figure 3.4-1] Remote power on and End-key power on circuit
3. BB Circuit Technical brief
GD910 service manual
R319 120
END_KEY
Q301
EMX18
R321
RPWRON
220K
C308 R322
10u 220K
- 37 -
CN301
1
KEY_OUT(1)
2
KEY_IN(1)
3
KEY_IN(2)
4
END_KEY
5
VBAT
6
SEND : KEY_IN(1) + KEY_OUT(1)
CLR : KEY_IN(2) + KEY_OUT(1)
LGE Internal Use Only