LG Electronics KS360 service manual Charging trouble, 2V~3.75V, 75V~3.64V 3.64V~3.45V 3.45V~3.35V

5. Trouble shooting

5.3 Charging trouble

Check Points

-Connection of TA (check TA voltage 5.6V)

-Charging Current Path component voltage drop -Battery voltage

1 Charging method : CC-CV

2 Charger detect voltage : 4.0 V

3 Charging time : 2h 30m

4 Charging current : 420 mA

5 CV voltage : 4.2 V

6 Cutoff current : 100 mA

7 Full charge indication current (icon stop current) : 100 mA

8 Recharge voltage : 4.15 V

			4.2V~3.75V
	VCHG		VBAT
ICVFP10181E301FR		TP1
	GND1 GND2 IN OUT	FL200
						CN200
						21
						19
						1
				FB200	1800	2
				FB201	1800	3
				FB202	1800	4
				FB203	1800	5
				R228	1	6
				R229	1	7
						8
				FB206	1800
						9
						10
						11
						12
						13
47						14
				R230	0	15
						16
47						17
47						18
						20
						22
		C214 39p	C215 1u	(1005,10V,K,X5R)

3.75V~3.64V 3.64V~3.45V 3.45V~3.35V

CHARGING IC OVP

VBAT VCHG_OVP VBUS_OVP

2V0_VRTC 2V62_VIO VBUS_USB VCHG

U201

ISL9221

1

PGND

13

TP2

R226

DNI

R209

100K

VDC

12

2

VUSB

VDC_BYP

11

3

BAT

_PPR

10

4

USB_BYP

EOC

_CHG

9

5

IVDC

CHG_EN

_EN

8

6

GND

R215

100K

(1608,25V,K,X5R)

(1608,25V,K,X5R)

10K

IMIN

7

33K

R214

(1005,10V,K,X5R)

(1005,10V,K,X5R)

(1005,10V,K,X5R)

IUSB

1u

1u

R213

R216

16K

1u

1u

1u

C209

C210

C211

C212

C213

(1%)

(1%)

(1%)

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