Charging Part - Samsung SGH-E700 Service Manual

3. Charging Part

A bnorm al charging part
C heck the U 501 pin 4
TR 500 pin 1 (C H G _O N )
C heck the U 501 pin 3
Y es
> 4.9V
Y es
U 501 pin 5 = " H " ?
Y es
= " L " ?
Y es
¡Ö4.2V
Y es
E ND
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SG H- E 700 F low Chart of Troubleshooting
N o
C heck the the circuit related to
V _E X T_C H A R G E
N o
R esolder or replace U501
N o
C heck the circuit related to
N o
R esolder or replace U 501
7- 5
C H G _O N signal