Samsung SGH-i200 Service Manual page 17

10. Chart of Troubleshooting
10-1.Baseband
10-1-1. Power ON
Power on does not work Power on does not work
Use Jig Box Cable Use Jig Box Cable
power off power off
Check the VBAT. Check the VBAT.
VBAT > 3.48V VBAT > 3.48V
Check the Power key. Check the Power key.
(SW600 # 2 Pin) (SW600 # 2 Pin)
press press
Low → → High Low → → High
Check the contact Check the contact
between battery and between battery and
battery connector. battery connector.
no contact no contact
Change Board. Change Board.
power on power on
Recharge the Battery. Recharge the Battery.
Resolder SW600. Resolder SW600.
Resolder BTC400 Resolder BTC400
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Yes Yes No No
<AP PMIC output> <AP PMIC output>
current > 80mA current > 80mA
[ INIT_PWR] signal [ INIT_PWR] signal
low → high low → high
Check the VCORE_1.2V, Check the VCORE_1.2V,
VCC_1.8V and VPLL_1.8V VCC_1.8V and VPLL_1.8V
Check the VAUX_2.8V Check the VAUX_2.8V
Check the VFUSE_2.5V Check the VFUSE_2.5V
Check the VCC_3.0V Check the VCC_3.0V
VAUDIO_1.8V, VAUDIO_3.0V VAUDIO_1.8V, VAUDIO_3.0V
Check the initial operation Check the initial operation
10-1
Re- down load Re- down load
Check the Check the
Initial operation Initial operation
Problem_# 1 Problem_# 1
check the U803 check the U803
Problem_# 2 Problem_# 2
Problem_# 3 Problem_# 3
Problem_# 4 Problem_# 4