Samsung GT-B3740 Service Manual page 28

Level 3 Repair
8-3-1. Power On
Power on does not work
check the current consumption is
less than 60mA
C400 ≥ 4.5V
C346(or C306) = 1.2V?
C302(or C311) = 1.8V?
C301(or C310) = 1.2V?
C340=2.8V?
Check the 38.4Mhz Clock
at C259.
Is it around 38.4Mhz?
Check the C300 = 1.8V?
YES
YES
YES
YES
YES
YES
YES
YES
END
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
NO
Change the PBA
NO
Check the HDC400
NO
Re-solder or change the U303
NO
Re-solder or change the U300
NO
Re-solder or change the U307
NO
Check the OSC100, U202
NO
Change the PBA
8-6