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8.
Level
3
Repair
8-1
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.
8-1.
Block Diagram
Level
3
Repair
Distribution, transmission, or infringement of any content or data from this document without Samsung
’s
written authorization is
strictly prohibited.
Confidential and proprietary-the contents in this service guide subject to change without prior notice.
8-2
8-2.
PCB Diagrams
8-2-1.
Top
Level
3
Repair
Distribution, transmission, or infringement of any content or data from this document without Samsung
’s
written authorization is
strictly prohibited.
Confidential and proprietary-the contents in this service guide subject to change without prior notice.
8-3
8-2-2.
Bottom
Level
3
Repair
Distribution, transmission, or infringement of any content or data from this document without Samsung
’s
written authorization is
strictly prohibited.
Confidential and proprietary-the contents in this service guide subject to change without prior notice.
8-4
8-3.
Flow Chart of Troubleshooting
Equipments
Ç
Oscilloscope
Ç
Digital Multimeter
Ç
Power Supply
Ç
+
driver, ESD Safe Tweezer
Ç
8960 &
Spectrum Analyzer
Ç
Soldering iron
Level
3
Repair
Distribution, transmission, or infringement of any content or data from this document without Samsung
’s
written authorization is
strictly prohibited.
Confidential and proprietary-the contents in this service guide subject to change without prior notice.
8-5
8-3-1.
Power On
Check the SLC800
(
soldering crack, open, etc)
Cell-phone can`t power on.
Change the SLC800
(
Power-key FPCB)
And retry to the power-on operation.
END
No
Yes
Check the U501 output voltage
(
C531
>2.0
V, C532
>1.2
V,
C562>
1.2
V)
If the output voltage is not satisfied with normal
condition, Change the U501.
※
Each voltage level has
±10%
margin.
No
Yes
Check the U501 output signal
SYS_nRESEPWON=0V(LOW)
If the output voltage is not satisfied with normal.
condition, Change the U501.
※
Each voltage level has
±10%
margin.
No
Yes
Check the Battery Voltage
.
Is
it more than
3.6
V?
Charging the battery by TA.
If its voltage level is extremely low(under
3.0
V),
Change the battery.
check the initial operation
Yes
Abnormal
Check the Clock OSC500(C523)
Is that frequency
32
Khz?
Change the OSC500.
If OSC400 does not still work, Change the U501
This problem is internal oscillator of U501.
※
Test condition
(
Oscilloscope setting)
:20.0
us.div
(
time division)
No
Yes
Yes
Change the FRONT-OCTA LCD ASSY
Power-on the phone and check
the power-on sound
or motor biration.
Sound or Biration is ok?
Yes
No
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