Samsung E2222 Block Diagram 7
Level
8.
Block Diagram
8-1.
Repair
3
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
C369
@
>=3.3V
YES
Is the assembling status of
SW304(ON KEY) O.K?
YES
Current consumption
>= 100mA?
YES
Check the power
VRF_2.85V(C205)
VDD_2.5V(C215)
VGPIO_2.8V(C200)
VANA_2.85V(C206)
VCORE_1.2V(C203)
VPERM_3.0V(C222)
VMEM_1.8V(C208)
NO
NO
NO
NO
Charge the Battery
1.
V, put more lead
2.If0
C369
@
Reassemble DomeSheet
1.
Download binary again
power management problem.
If you
do
.
Put more lead solder
each terminal
#2!!!
try and fail,
#1
YES
Check the OSC
C229,230)=
(
Check the OSC201
OSC1PIN,3PIN>=26MHz
Replace Board(PBA)
32.768
200
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
8-4
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Is It power turned on?
YES
END
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8-5
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※
8-6
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8-3-2.
SIM part
"
Insert SIM card" is displayed on the LCD
Check the connection of
SIM300,301 to SIM card
YES
Check the SIM Module
YES
Check the voltage
C333,
@
349 = 3.0V ?
YES
Replace Board(PBA)
NO
NO
NO
Back to
previous step
insert SIM card again
after check connection
SIM300,301
Replace the SIM module
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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8-3-3.
GSM
RX
850
Phone can't catch GSM850 network
NORMAL CONDITION
catch the channel?
PAM100 CHECK
RFS100
@
Check the connection
GSM850 RX LINE
Check the voltage
PAM100@C111
-65
≥
YES
dBm
YES
YES
≥3.0
?
V?
NO
NO
NO
NO
Put more lead solder
L100,L101,C108,C107,
@
RFS100,C102,L108
Put more lead solder
RFS100,L108,C102
Put more lead solder
C118,L115,F100,C173
C174,L114
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
8-9
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8-3-4.
GSM900 RX
Phone can't catch GSM900 network
NORMAL CONDITION
catch the channel?
YES
PAM100 CHECK
RFS100
@
Check the connection
GSM900 RX LINE
dBm
-65
≥
YES
YES
CONTINUOUS RX ON
RF INPUT
mplitude
A
NO
NO
?
NO
Put more lead solder
L100,L101,C108,C107,
@
RFS100,C102,L108
Put more lead solder
RFS100,L108,C102
Put more lead solder
C118,L115,C171,C172,L111
F100
@
:62
:-50
CH
dBm
Check the voltage
PAM100@C111
Replace Board(PBA)
≥3.0
YES
NO
V
Back to
previous step
Put more lead solder
each terminal
NO
Does Phone catch
the GSM900 network?
YES
END
8-10
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