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
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SAMSUNG Proprietary-Contents may change without notice
SGH-C100 Flow Chart of Tro ubleshoo ting
4- 5
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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
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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

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SGH-C100 Flow Chart of Troubleshooting
4- 8
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SAMSUNG Proprietary-Contents may change without notice
SGH-C100 Flow Chart of Tro ubleshoo ting
4- 9
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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

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SGH-C100 Flow Chart of Troubleshooting
4- 10
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7.Speaker
*Play on 16-polymelody before testing.
Check the pin1 of
U 500'sclock ¡ 3.9MHz
Receiver does not w ork
C heck the pin17 & 18
of U 500 isaround
audiosignal ¡ 2V
C heck U 200
C heck U 500
Is Speaker w orking ?
END
No
Yes
Yes
No
Replace the Speaker
Yes
No
C heck the w ave of pin3
& 9 of U 502 Check U 502 and soldering
No
Yes
Check the w ave of
C 412 & C421
C heck the path from U 502 to
SPK 400
No
Yes

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SGH-C100 Flow Chart of Tro ubleshoo ting
4- 11
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8.Key Data Input
'#pad'(See the picture
below ) is'high'(¡
2.8V )
C heck the Initial O peration
EN D
Yes
W hen one of the key
is pushed, # pad is
'low '
Yes
C heck U 300
No
Replace the D om Sheet O R
Check if the V 402,403,404 are
opened
No
Yes
C heck the K eypad &
D om Sheet
Replace or A djust
the K eypad & D om Sheet

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SGH-C100 Flow Chart of Troubleshooting
4- 12
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9.Light
B acklight"ON"mode in
the m enu?
B acklight does not w ork
C heck the voltage of
C403 ¡ˆ9V ?
Select backlight "ON " m ode
C heck the circu itrelated to U 402
END
No
Yes
No
LC D backlight on ? C heck the LC D
Yes
Yes
No

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SGH-C100 Flow Chart of Tro ubleshoo ting
4- 13
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10.GSM Receive r
Pin1 of CN 100
¡ˆ-65dB m
RX On
RF input:37 CH
A m p. : -60 dBm
Pin9 of U 104
¡ˆ-65dBm
Pin11 ofU100
¡ˆ-65dB m
Yes
No
No
Pin7 of U 104
¡ˆ-65dBm
Yes
No
Yes
No
Yes
Check CN100
R esolder C133
C heck the pin 9 of U 104
Check U 104
Check C 140 & L104
EN D

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SGH-C100 Flow Chart of Troubleshooting
4- 14
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11. GSM Transm itte r
Pin 9 of U 104
¡ˆ30dB m
TX On
(L evel : 5)
Battery V olta g e : 3 .8V
Pin 1 of U 103
¡ˆ30dB m
Pin64 ofU100
¡ˆ 9dB m
Yes
No
No
Pin 7 of U 102
¡ˆ30dB m
Yes
No
Yes
No
Yes
Check the U 104
Check the U 103
Check U 102
Check U 100
EN D
Pin2of
C N 100
¡ˆ30dB m
No
C heck the C N 100

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SGH-C100 Flow Chart of Tro ubleshoo ting
4- 15
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12.DCS Receiver
Pin1 of CN 100
¡ˆ-65dB m
RX On
RF input : 698 CH
A m p. : -60 dBm
Pin9 of U 104
¡ˆ-65dBm
Pin13 ofU100
¡ˆ-65dB m
Yes
No
No
Pin11 of U 104
¡ˆ-65dBm
Yes
No
Yes
No
Yes
Check CN100
R esolder C133
C heck the pin 9 of U 104
Check U 104
C heck C 121 & C 141 & L105
EN D

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SGH-C100 Flow Chart of Troubleshooting
4- 16
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13.DCS Transm itte r
Pin 9 of U 104
¡ˆ27dBm
TX On
(Level : 0)
Battery V olta g e : 3 .8V
Pin 3 of U 103
¡ˆ27dBm
Pin 1 of U 100
¡ˆ9dBm
Yes
No
No
Pin12ofU102
¡ˆ27dBm
Yes
No
Yes
No
Yes
C heck the U 104
C heck the U 103
Check U 102
C heck U 100
EN D
Pin2of
C N 100
¡ˆ27dBm
No
Check the CN 100

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SGH-C100 Flow Chart of Tro ubleshoo ting
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U100
L106 56nH

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2. SGH-C100 Exploded View and its P a rts list
2- 1
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1.Cellular phone Exploded View
1
4
9
2
3
6
10
5
8
11
1-1
12
16
13
15
14
7

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SGH-C100 Exploded view and itsPartlist
2- 2
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2.Cellular phone Parts list
NO D escription SEC.CODE REM ARK
1FRONT COVER G H 75-028 73A
1-1 WINDOW LCD G H 72-072 26A
2M OTOR G H 31-000 55A
3SPEAK ER 3001-001408
4KEYPA D G H 72-02933A
5MAIN PBA G H 92-013 75A
6LCD G H 07-003 15A
7SCREW 6001-001 645
8M ETAL DOM E G H 59-006 95A
9MIC HOLDER G H 73-018 67A
10 MICG H 30-000 20A
11 CONNECTOR COVER G H 73-018 68A
12 REAR C OVER G H 75-02874A
13 VOLUM E KEY G H 75-02934A
14 SCREW 6001-001 654
15 RF COV ER G H 73-018 69A
16 BAT TERY G H 4300184A