Advertisement
8. Level 3 Repair
8-4-1. Power on
Mobile phone does not power on
check the initial operation (8-4-3)
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung's written authorization is strictly prohibited.
YES
Check the Battery
Voltage level.
Is it more than 3.5V?
YES
Power-on the phone and
check the power-on
sound
or motor Vibration.
Sound or Vibration is
ok?
No
When pressing Power
key, check if the Power
key connector is plughed
in PBA
crack,open,etc)
YES
Check the signal of
AP_PS_HOLD = 1.8V
YES
YES
END
If the voltage has not reached over 3.5V,
NO
replace the battery first.
Even if changed the battery, the battery
voltage has not reached, replace the PBA
Yes
Replace the Front assembly including display.
NO
Plug in the POWER KEY connector.
#1 Check the TP5003 is 1.8V
#2 Check the output voltage of U7000 and U7001
- C7072 = 3.3V
- L7029 = 0.816V
※ Each voltage level has ±10% margin
→ Replace the U7000 and U7001 or the PBA If
the voltage level is abnormal,
NO
#4 Check the Clock OSC7000.
Frequency is 38.4MHz
※ Test condition (Oscilloscope setting)
: 20.0ns/div (time division) , 500mV/div (voltage)
Replace the OSC7000.
Advertisement
