Samsung SGH-C100 Service Manual
GSM TELEPHONE
SGH-C100
SERVICE
Manual
GSM TELEPHONE CONTENTS
1. Specification
2. Exploded Views and Parts List
3. Electrical Parts List
4. Flow Chart of Troubleshooting
5. Block Diagram
6. PCB Diagrams
4
. SGH-C100 Flow Chart of Troubleshooting
1
.Power ON
'POW ER ON 'does not w ork
C heck the current
consum ption m ore than
100m A
Yes
C heck the V oltage of the
B a tte r y m o r e th a n 3 .3V
Yes
C heck the capac itor C236
close by U 200(M SD ) is
m o re th a n 3 .2V
Yes
No
Download again
No
Charge the Batte ry
No
C heck to the path from CN 402 to
capacitor C 236 close by U 200(M SD )
2.7V ¡´C 234 of
U 200(M SD )
=2.8V
Yes
Check the TP222 of
U 200(M SD ) ishigh¡ 2.8V
Yes
C heck the initial operation
END
SAMSUNG Proprietary-Contents may change without notice
his Docum ent can not be used w ithout Sam sung's authorization
T
No
C heck the M SD (U 200)
No
C heck the C X805-31P(U 300)
-1
4
S
GH-C100 Flow Chart of Troubleshooting
2
.Initial
Initial Failure
Check the R209 of
U200 is'High'
Yes
No
Check the U200(M SD )
C heck the clock
signal'swave at
R201(19.5M H z)
Yes
Check the TP234
3.9M H z w ave & T P220
is"High"
Yes
Check the connections and initialization
using F actory T est P rogram
No
C heck the clock generation circu it
(re lated to U 200 and O SC200)
No
Check the U200(M SD )
END
4- 2
SAMSUNG Proprietary-Contents may change without notice
his Docum ent can not be used w ithout Sam sung's authoriza tion
T
3
.Charging
T e st afte r connecting w ithBatte ry
*
:All4 term inalsinbattery sho uldbeconnected to the phon e by using jum p -w ires.
Abnorm al charging part
S
GH-C100 Flow Chart of Troubleshooting
C
heck the pin17
of CN 402 isaround
5V
Yes
C heck the pin6of
U 210 is"LOW"
Yes
C heck the pin3of
U 210 is "LOW "
Yes
END
No
No
Check the T A
No
Check the U 210
C heck the pin
3 of U 503 is
short to g roun d
Yes
C heck the connections of
4terminalsin b a tte r y
4- 3
SAMSUNG Proprietary-Contents may change without notice
his Docum ent can not be used w ithout Sam sung's authoriza tion
T
S
GH-C100 Flow Chart of Troubleshooting
4- 4
SAMSUNG Proprietary-Contents may change without notice
his Docum ent can not be used w ithout Sam sung's authoriza tion
T
4
.Sim
* Testwith S im
Phone can't access SIM card
Yes
S
GH-C100 Flow Chart of Troubleshooting
C heck the the voltage
at pin1& 5of
C N 500 is2.8V ?
Yes
C heck the C N 500's
Connection toSIM
card
Yes
Check the circu it around U 301
(M EM ORY) and datastoredinit
Yes
No
No
Check the circu itrelated to
C N 500
Resolder CN 500
EN D
4- 5
SAMSUNG Proprietary-Contents may change without notice
his Docum ent can not be used w ithout Sam sung's authoriza tion
T
S
GH-C100 Flow Chart of Troubleshooting
4- 6
SAMSUNG Proprietary-Contents may change without notice
his Docum ent can not be used w ithout Sam sung's authoriza tion
T
5
.M icro phone Part
*Callwith S im before testing.
MicroPhone does not w ork
Yes
check the connection
from M IC500
Yes
No
S
GH-C100 Flow Chart of Troubleshooting
R esolder M IC500
check the vo ltage of
C214 ¡ˆ2.0V
Yes
C heck the A u d ioloopback by
board test program .
EN D
No
C heck the pa tharoundMICbias
circu it
4- 7
SAMSUNG Proprietary-Contents may change without notice
his Docum ent can not be used w ithout Sam sung's authoriza tion
T
S
GH-C100 Flow C hart o f Tro ubleshoo ting
4- 8
SAMSUNG Proprietary-Contents may change without notice
his Docum ent can not b e used w ithout S am sung's authoriza tion
T
Loading...