Chart Of Troubleshooting - Samsung SGH-J610 Service Manual

10. Flow Chart of Troubleshooting
10-1.Baseband
10-1-1. Power ON
'Power On' does not work
Yes
Check the current
consumption more
than 100mA
Yes
Check the VBAT
more than 3.3V
Yes
Check the
VCCD_1.2V_A
of UCD300 is more
than 1.2V
Yes
Check VCCD_1.8V
of UCD300=1.8V,
VCCD_2.9V
of UCD300=2.9V
Yes
Check VRF_2.9V of
UCD300=2.9V,
VSYN_2.8V of
UCD300=2.8V
Yes
Check OSC100 pin#1
or pin#3 Freq = 26MHz,
Vp-p > 0.8V
Yes
Check the initial operation
Yes
END
10-1
No
Download again
No
Charge the Battery
①
No
Check UCD300 and
②
No
Check UCD300 and C333,C334
③
No Check UCD300
and C310,C311,C337,C341
④
No
Check the clock generation
circuit(OSC100)
C329