Samsung GT-S7230 TSHOO
Level
8.
Block Diagram
8-1.
Repair
3
4Gb
oneNAND
Flash
LED
u-USB
IF
Flash LED
Driver
SD CARD
USB
Switch
2Gb SDR
SDRAM
EARPHONE
8-1
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PCB Diagrams
8-2.
8-2-1.
Top
8-2
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8-2-2.
Bottom
8-3
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8-3-1.
Power On
Power On"does not work
"
Check theVBAT Voltage
C606 or C608
@
Is the soldered status of
KEY701(ON KEY) O.K?
Current consumption
>= 100mA?
Check the power
VAMP1_3.0V(C436)
VANLG1_3.0V(C441)
VDD_1.2V(C426)
VUSB_3.3V_NVM(C434)
VDDORF2_2.5V(C432)
VCORE_1.2V(C415)
VBBD_2.9V(C440)
VMEM_1.8V(C416)
VSIM_3.0V(C424)
VDDAUX1_2.9V(C439)
VANLG2_3.0V(C430)
>=3.3V
YES
YES
YES
NO
NO
NO
NO
Charge the Battery
1.
V, put more lead
2.If0
C606, C608
@
Put more lead each terminal
1.
Replace KEY701
2.
Download binary again
power management problem.
Put more lead solder
.
each terminal
If you
do
#2!!!
try and fail,
#1
YES
Check the OSC400
C406,410)=
(
Check the TCX100
Replace Board(PBA)
32.768
C153=26MHz
@
YES
YES
KHz
?
NO
?
NO
Back to
previous step
inner clock problem.
Put more lead solder
each terminal
Put more lead soler
each terminal
NO
Is It power turned on?
8-4
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YES
END
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8-5
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C153
8-6
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8-3-2.
SIM part
"
Insert SIM card" is displayed on the LCD
Check the connection of
HDC401 to SIM card
YES
Check the connection
C450,C451,C453
YES
Check the voltage
C452
@
Replace Board(PBA)
=3.0V?
YES
NO
NO
NO
Back to
previous step
insert SIM card again
after check connection HDC401
Put more lead each terminal
Put more lead each terminal
Does Phone accept
NO
the SIM card?
YES
END
8-7
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8-8
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8-9
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8-3-3.
GSM
RX
850
Phone can't catch GSM850 network
NORMAL CONDITION
catch the channel?
PAM100 CHECK
CN100
@
Check the connection
C165, C167, L119
Check the voltage
PAM100@C103
-65
YES
dBm
YES
YES
?
3.0V ?
NO
NO
NO
Put more lead solder
C104,L105,C170,L120,L101
@
L102, R100,R101,R102,R103
NO
Put more lead solder CN100,
L120,L101,L102,L131
Put more lead solder
each terminal
Put more lead solder
each terminal
CONTINUOUS RX ON
RF INPUT
mplitude
A
: 190
:-50
CH
dBm
YES
Replace Board(PBA)
Back to
previous step
Does Phone catch
the GSM850 network?
YES
END
8-10
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8-3-4.
GSM900 RX
Phone can't catch GSM900 network
NORMAL CONDITION
catch the channel?
YES
PAM100 CHECK
CN100
@
Check the connection
C160, C163, L117
dBm
-65
YES
YES
CONTINUOUS RX ON
RF INPUT
mplitude
A
NO
NO
?
NO
Put more lead solder
C104,L105,C170,L120,L101
@
L102, R100,R101,R102,R103
Put more lead solder@CN100,
L120,L101,L102,L131
Put more lead solder
each terminal
:62
:-50
CH
dBm
Check the voltage
PAM100@C103
Replace Board(PBA)
3.0V ?
YES
NO
Back to
previous step
Put more lead solder
each terminal
NO
Does Phone catch
the GSM900 network?
YES
END
8-11
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8-3-5.
DCS RX
Phone can't catch DCS network
NORMAL CONDITION
catch the channel?
YES
PAM100 CHECK
CN100
@
Check the connection
C158, C159, L116
dBm
-65
?
YES
NO
NO
Put more lead solder
C104,L105,C170,L120,L101
@
L102, R100,R101,R102,R103
NO
Put more lead solder
CN100,L120,L101,L102
@
Put more lead solder
each terminal
CONTINUOUS RX ON
RF INPUT
mplitude
A
: 698
:-50
CH
dBm
Check the voltage
PAM100@C103
Replace Board(PBA)
YES
3.0V ?
YES
NO
Back to
previous step
Put more lead solder
each terminal
NO
Does Phone catch
the DCS network?
YES
END
8-12
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8-3-6.
PCS RX
Phone can't catch PCS network
NORMAL CONDITION
catch the channel?
YES
PAM100 CHECK
CN100
@
Check the connection
C154, C155, L115
dBm
-65
?
YES
NO
NO
NO
Put more lead solder
C104,L105,C170,L120,L101
@
L102, R100,R101,R102,R103
Put more lead solder
CN100,L120,L101,L102
@
Put more lead solder
each terminal
CONTINUOUS RX ON
RF INPUT
mplitude
A
: 644
:-50
CH
dBm
Check the voltage
PAM100@C103
Replace Board(PBA)
YES
3.0V ?
YES
NO
Back to
previous step
Put more lead solder
each terminal
NO
Does Phone catch
the PCS network?
YES
END
8-13
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8-3-7.
WCDMA Band8RX
Phone can't catch WCDMA900 network
NORMAL CONDITION
catch the channel?
PAM100 CHECK
CN100
@
Check the connection
C106, C107 L107
-65
YES
dBm
YES
CONTINUOUS RX ON
RF INPUT
mplitude
A
NO
NO
?
NO
Put more lead solder
C104,L105,C170,L120,L101
@
L102, R100,R101,R102,R103
Put more lead solder
CN100,L120,L101,L102
@
Put more lead solder
each terminal
: 10700
:-50
CH
dBm
Check the voltage
PAM100@C103
Replace Board(PBA)
YES
3.0V ?
YES
NO
Back to
previous step
Put more lead solder
each terminal
NO
Does Phone catch
WCDMA900 network?
YES
END
8-14
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8-3-8.
WCDMA Band1RX
Phone can't catch WCDMA2100 network
NORMAL CONDITION
catch the channel?
PAM100 CHECK
CN100
@
Check the connection
C115, C116 L113
-65
YES
dBm
YES
CONTINUOUS RX ON
RF INPUT
mplitude
A
NO
NO
?
NO
Put more lead solder
C104,L105,C170,L120,L101
@
L102, R100,R101,R102,R103
Put more lead
CN100,L120,L101,L102
@
Put more lead solder
each terminal
: 3013
:-50
CH
dBm
Check the voltage
PAM100@C103
Replace Board(PBA)
YES
3.0V ?
YES
NO
Back to
previous step
Put more lead solder
each terminal
NO
Does Phone catch
WCDMA2100 network?
YES
END
8-15
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