Samsung SGH-C100 User manual

SGH-C100
SERVICE
Manual
GSMTELEPHONECONTENTS
1.Specification
2.ExplodedViewsand PartsList
3.ElectricalPartsList
4.FlowChartofTroubleshooting
5.BlockDiagram
6.PCB Diagrams
GSMTELEPHONE

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4. SGH-C100 Flow Chart of Troubleshooting
4-1
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1.Power ON
C heck the current
consum ption m ore than
100m A
'POW ER ON 'does not w ork
C heck the V oltage of the
B a tte ry m o re th a n 3 .3V
Download again
Charge the Batte ry
C heck the capacitor C236
close by U 200(M SD ) is
m o re th a n 3 .2V
C heck to the path from CN 402 to
capacitor C236 close by U 200(M SD )
2.7V ¡´C 234 of
U 200(M SD )
=2.8V C heck the M SD (U 200)
Check the T P222 of
U 200(M SD ) ishigh¡ 2.8V C heck the C X805-31P(U 300)
C heck the initial operation
END
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No

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SGH-C100 Flow Chart of Troubleshooting
4- 2
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2.Initial
Initial Failure
No
No
No
Check the R209 of
U200 is'High'
C heck the clock generation circu it
(re lated to U 200 and O SC200)
C heck the clock
signal'swaveat
R201(19.5M H z)
Check the U 200(M SD )
Yes
Check the T P234
3.9M H z w ave & T P220
is"High"
Check the U 200(M SD )
Check the connections and initialization
using F actory T est P rogram
Yes
END
Yes

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SGH-C100 Flow Chart of Tro ubleshoo ting
4- 3
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3.Charging
*T e st afte r conn ecting w ithBatte ry
:All4 term inalsinbattery sho uldbeconnected to the ph on e by using jum p -w ires.
Check the pin17
of CN 402 isaround
5V
Abnorm al charging part
C heck the pin6of
U 210 is"LOW"
Check the T A
Check the U 210
C heck the pin3of
U 210 is "LOW "
END
No
Yes
Yes
Yes
No
No C heck the pin
3 of U 503 is
short to ground
Yes
C heck the connections of
4terminalsin b a tte ry

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SGH-C100 Flow Chart of Troubleshooting
4- 4
This Do cu m ent can not be used w ithout Sam sung's authorization

SAMSUNG Proprietary-Contents may change without notice
SGH-C100 Flow Chart of Tro ubleshoo ting
4- 5
This Do cu m ent can not be used w ithout Sam sung's authorization
4.Sim
* Testwith S im
C heck the the voltage
at pin1& 5of
C N 500 is2.8V ?
Phone can't access SIM card
C heck the C N 500's
Connection toSIM
card
Check the circu itrelated to
C N 500
Resolder CN 500
Check the circu it around U 301
(M EM ORY) and datastoredinit
EN D
No
Yes
Yes
Yes
Yes
No

SAMSUNG Proprietary-Contents may change without notice
SGH-C100 Flow Chart of Troubleshooting
4- 6
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SAMSUNG Proprietary-Contents may change without notice
SGH-C100 Flow Chart of Tro ubleshoo ting
4- 7
This Do cu m ent can not be used w ithout Sam sung's authorization
5.M icrophone Part
*Callwith S im before testing.
check the connection
from M IC500
MicroPhone does not w ork
R esolder M IC500
C heck the A udioloopback by
board test program .
EN D
No
Yes
Yes
check the voltage of
C214 ¡ˆ2.0V
Yes
C heck the patharoundMICbias
circu it
No

SAMSUNG Proprietary-Contents may change without notice
SGH-C100 Flow Chart of Troubleshooting
4- 8
This Do cu m ent can not be used w ithout Sam sung's authorization

SAMSUNG Proprietary-Contents may change without notice
SGH-C100 Flow Chart of Tro ubleshoo ting
4- 9
This Do cu m ent can not be used w ithout Sam sung's authorization
6.Receiver
*Call before testing.
Put 'sine w ave' from
8960, and Check the
pin5,7 of U 502 issine
wave
Receiver does not w ork
Check the pin3,9of
U 502 issine w ave
Check U 200 and speak related
circu it
C heck U 502 and soldering
END
No
Yes
Yes
No
C heck the w ave of
C412 & C421
Is Speaker w orking ?
C heck the path fro m U 5 0 2 to
SPK 400
Replace the Speaker
No
Yes
Yes
No