LG -D722V Service Manual page 101

4. 10. Power
PM_KYPD_PWR_N
JTAG_PS_HOLD
MSM_PS_HOLD
MSM_RESIN_N
-KPD_PWR_N
Check the signal change from high to low
PM_KYPD_PWR_N
when push the PWR key. (R4105)
JTAG_PS_HOLD
MSM_PS_HOLD
CN100 MSM_RESIN_N
1
2
3
4
5
6 CN100
1
2
3
4
5
6
- PS_HOLD check : R4104
- PS_HOLD check : R4104
It should be high when power on
It should be high when power on
PM_KYPD_PWR_N
JTAG_PS_HOLD
MSM_PS_HOLD
MSM_RESIN_N
LGE Internal Use Only
85
CBL_PWR_N
102
KPD_PWR_N
108
OPT_2
119
OPT_1
100
R4104 10K
PS_HOLD
101
R4105 0
RESIN_IN
77
PON_RESET_N
85
CBL_PWR_N
102
KPD_PWR_N
108
OPT_2
119
OPT_1
100
R4104 10K
PS_HOLD
101
R4105 0
RESIN_IN
77
PON_RESET_N
R101 100
R102
R103
R101 100
R102 100
D105 D103
CN100(2,3 pin -> power key)
CN100(2,3 pin -> power key)
D104
R103 100
D105 D103
D104
85
CBL_PWR_N
102
KPD_PWR_N
108
OPT_2
119
OPT_1
100
R4104 10K
PS_HOLD
101
R4105 0
RESIN_IN
77
PON_RESET_N
100
PM_KYPD_PWR_N
100
KEYPAD_SENSE_0
PM_KYPD_PWR_N
KEYPAD_SENSE_2
- 101 - Copyright © 2014 LG Electronics. Inc. All right reserved.
3. TROUBLE SHOOTING
KEYPAD_SENSE_0
KEYPAD_SENSE_2
2
3
Only for training and service purposes
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