Samsung SGH-X660 Service Manual
GSM TELEPHONE
SGH-X660
GSM TELEPHONE
CONTENTS
1. Specification
2. Flow Chart of Troubleshooting
3. Exploded Views and Parts List
4. Electrical Parts List
5. PCB Diagrams
6. Block Diagrams
1. SGH-X660 Specification
1-1. GSM General Specification
GSM900
Phase 1
Freq. Band[MHz]
Uplink/Downlink
ARFCN range 1~124
Tx/Rx spacing 45MHz 45MHz 95MHz 80MHz
Mod. Bit rate/
Bit Period
Time Slot
Period/Frame
Period
Modulation 0.3GMSK 0.3GMSK 0.3GMSK 0.3GMSK
MS Power 33dBm~5dBm 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm
890~915
935~960
270.833kbps
3.692us
576.9us
4.615ms
EGSM 900
Phase 2
880~915
925~960
0~124 &
975~1023
270.833kbps
3.692us
576.9us
4.615ms
DCS1800
Phase 1
1710~1785
1805~1880
512~885 512~810
270.833kbps
3.692us
576.9us
4.615ms
PCS1900
1850~1910
1930~1990
270.833kbps
3.692us
576.9us
4.615ms
Power Class 5pcl ~ 1 9pcl 5pcl ~ 19pcl 0pcl ~ 15pcl 0pcl ~ 15pcl
Sensitivity -102dBm -102dBm -100dBm -100dBm
TDMA Mux 8 8 8 8
Cell Radius 35Km 35Km 2Km -
1-1
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SGH-X660 Specification
1-2. GSM TX power class
TX Power
control level
533±2dBm
631±2dBm
729±2dBm
827±2dBm
925±2dBm
10 23±2 dBm
11 21±2 dBm
GSM900
TX Power
control level
0 30±3 dBm
1 28±3 dBm
2 26±3 dBm
3 24±3 dBm
4 22±3 dBm
5 20±3 dBm
6 18±3 dBm
DCS1800
TX Power
control level
0 30±3 dBm
1 28±3 dBm
2 26±3 dBm
3 24±3 dBm
4 22±3 dBm
5 20±3 dBm
6 18±3 dBm
PCS1900
12 19±2 dBm
13 17±2 dBm
14 15±2 dBm
15 13±2 dBm
16 11±3 dBm
17 9± 3dBm
18 7±3 dBm
19 5±3 dBm
7 16±3 dBm
8 14±3 dBm
9 12±4 dBm
10 10±4 dBm
11 8±4 dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
7 16±3 dBm
8 14±3 dBm
9 12±4 dBm
10 10±4 dBm
11 8±4 dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
1-2
15 0±5 dBm
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2. SGH-X660 Flow Chart of Troubleshooting
2-1.Baseband
2-1-1. Power ON
'Power On' does not work
Check the Current
consumption
>= 100mA
Yes
Check the Vbat
Voltage >=3.4V
Yes
Check the pin of U102
VCCD_2.9 of U102
>=2.9V
Yes
VCCD_1.6 of U105
>=1.6V
VRF_2.9, VCCA_2.9
of U102 >= 2.9V
No
No
No
No
No
Download again
Charge the Battery
Check U102
Check U105
Check U102
1
2
1
Yes
Checktheclocksignalatpin#3ofOSC701
There is 26MHz wave
form at the OSC701
pin#1,3
Yes
Check the initial operation
END
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No
Check the clock generation
circuit(related to OSC701)
2-1
3
SGH-X660 Flow Chart of Troubleshooting
U102
N
4
2
P
N
N
P
T
P
N
P
N
N
P
B
B
A
A
Q
T
T
T
T
N
X
I
U
U
U
U
T
C
I
X
O
O
O
O
R
A
A
M
A
A
2
2
6
4
1
2
1
1
1
1
1
C
P
P
R
N
N
T
T
T
N
P
U
U
N
U
N
I
O
C
C
I
I
M
M
4
5
1
1
N
M
P
M
U
N
N
O
I
O
I
G
C
O
X
X
X
X
E
V
C
I
U
U
U
U
X
R
V
A
V
A
A
A
M
3
3
3
4
5
3
5
1
1
1
1
1
1
1
L
L
P
R
K
M
M
K
L
N
C
K
I
O
N
_
G
C
D
D
R
I
I
I
I
E
C
T
A
A
A
A
R
R
V
D
D
D
D
4
4
4
6
6
4
1
L
P
N
R
M
R
1
X
W
W
Q
U
S
S
A
A
_
_
R
_
N
T
R
R
E
C
N
C
D
I
W
W
O
P
P
M
X
A
D
5
4
1
5
6
3
1
1
P
P
D
R
C
C
H11
VRTC
G12
LED2_DRV
G13
LED1_DRV
F13
RING_DRV
F15
VIB_DRV
C12
VLDO_7
A14
VLDO_6
C9
VL5S_B
D10
VL5S_A
B10
VLDO_5
B11
VL4S_B
A12
VL4S_A
B12
VLDO_4
A13
VLDO_3
J12
VLDO_2
G11
VLDO_1
F14
VACC
K8
CSN_PSC
L8
SCLK_PSC
N7
SDO_PSC
M7
SDI_PSC
E14
VEXT
E13
VBAT
E11
CH_BDRV
F12
CH_ISEN
D14
CH_RES
D15
ADC_AUX2
E10
ADC_AUX1
A10
VREF
N
E9
CREF
E
P
F
_
H10
E
U
RTC_ALMN
O
G
E
B
_
N
K
_
T
_
Q
E
1
R
E
_
R
R
D
S
W
T
B
O
E
I
W
S
N
V
R
P
P
I
M
9
7
9
0
1
L
K
M
N
C124
9
0
1
L
L
TP101
R117
R110
KEY_BACKLIGHT
BAND_SEL2
BAND_SEL1
UP_CS
UP_SCLK
UP_SDO
UP_SDI
VEXT
VBAT
ICHRG
R108
VCCB_2.9
RTCALARM
R107
10K,1%
VCCB_2.9
VCCD_1.8
C122 C119
C121
BP_VF
C105
R109
C123
TH101
R101
VRF_2.9 VCCD_2.9VCCA_2.9
C118C120 C117
VCCB_2.9
C113
INTRQ
PWR_KEEP
F
P
P
N
N
B
A
B
A
T
T
T
T
U
U
U
U
O
O
O
O
A
A
A
A
P
N
N
N
N
T
T
N
N
I
I
U
U
C
C
I
I
O
O
M
C
M
C
I
I
M
M
N
T
T
N
N
G
G
I
I
U
U
E
E
X
X
O
O
R
R
U
U
X
X
V
V
A
A
U
U
A
A
C126
AGND
P
P
P
P
T
N
N
C
K
Q
2
A
3
N
K
E
L
O
C
X
U
N
O
O
M
I
_
_
B
_
_
_
R
G
P
M
I
1
S
3
J
W
1
W
D
P
S
K
L
P
C
R112
R111
VBAT
RST
1
2-2
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VCCD_2.9 VCCD_1.6VBAT
SGH-X660 Flow Chart of Troubleshooting
2
R116
C128
RTX_IP
RTX_IN
RTX_QP
RTX_QN
SERDAT
SERLE
SERCLK
U105
1
2
3
VIN
GND
EN
SW
FB
BIP
7
BIN
6
BQP
5
BQN
4
SDIO
3
_SEN
2
SCLK
1
D
C
C
N
N
N
G
33
3435
5
4
32
U702
N
E
X
31
L101
1
L
A
T
X
30
C129C130
2
L
A
T
X
D
D
D
D
V
V
28
29
3
XOENA
43
2
1
C722
OSC701
2-3
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SGH-X660 Flow Chart of Troubleshooting
2-1-2. Initial
Initial Failure
Yes
IS the pin #K9 of U102
"Low→High" ?
Yes
There is 32.768kHz wave
form at the C220 & C221
Yes
There is 24MHz wave form
at the OSC301 pin#1,3
Yes
LCD display is O.K
Yes
Sound operation O.K
No
(if it has some problem, it is to be replaced.)
No
No
No
No
Check the OSC202
Check the OSC301
Check the LCD part
Check the Audio part
Check the U102
2
3
1
Yes
END
2-4
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SGH-X660 Flow Chart of Troubleshooting
VREF
CREF
R112
D15
E10
A10
E9
H10
C124
R108
RTCALARM
R110
INTRQ
PWR_KEEP
R111
VBAT
RST
E
D
O
M
0
1
N
ADC_AUX2
ADC_AUX1
P
E
RTC_ALMN
E
K
_
Q
R
R
T
W
N
P
I
9
0
1
M
L
N
E
_
G
N
R
_
B
I
V
9
L
U102
4
X
K
Q
U
L
A
A
C
_
N
_
C
E
C
C
D
T
O
A
R
M
X
5
6
4
1
P
R
N
D
C
K
Q
2
A
M
3
_
N
K
E
M
L
3
O
C
1
X
K
L
C
N
F
1
2
U
O
W
W
B
_
S
S
_
T
_
_
R
T
N
I
D
3
P
T
N
I
_
P
S
D
1
E
R
R
S
W
E
W
W
S
P
R
P
P
4
5
7
9
1
1
L
K
C
C
F
N
N
U
O
O
_
_
B
_
R
G
I
1
J
W
W
P
S
P
1
2-5
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SGH-X660 Flow Chart of Troubleshooting
N
N
N
0
T
T
A
A
D
D
_
_
I
I
C
C
M
M
_
_
2
1
2
2
O
O
I
I
P
P
2
3
1
1
L
K
0
3
_
2
D
T
T
T
T
A
A
A
M
A
D
D
D
C
D
_
_
_
_
_
I
I
I
I
I
C
C
C
C
C
M
M
M
M
M
_
_
_
_
_
C
3
4
0
3
9
T
4
2
4
2
3
R
O
O
O
O
O
I
I
I
I
I
1
P
P
P
P
P
X
4
4
5
4
3
1
L
9
1
1
1
1
1
L
L
N
H
M
E
E
_
E
_
1
Q
E
P
R
E
K
E
L
6
K
N
C
4
R
M
T
S
O
I
R
Y
W
U
P
S
P
A
O
_
_
_
L
2
C
T
R
2
X
9
1
F
1
0
9
0
3
A
2
1
1
M
C
C
O
O
O
S
T
I
I
W
I
P
P
P
P
O
R
9
5
5
7
6
7
1
1
1
1
1
G
P
P
H
V
G
2
5
8
7
6
3
2
2
2
2
O
O
O
O
O
I
I
I
I
I
P
P
P
P
P
9
3
7
9
6
1
1
1
1
1
V
R
U
U
W
C221
R304
4
GND2
3
HOT
OSC202
C220
R303
2
C311
3
C316
GND1
HOT
2
1
OSC301
2-6
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2-1-3. Sim Part
"Insert SIM" is displayed on the LCD
SGH-X660 Flow Chart of Troubleshooting
Yes
Check the SIM
connector's (SIM101)
connection to SIM Card
Yes
Check the voltage at
SIM101 pin #1≥2.8V
There is any signal
pin#2,#3,#4 of SIM101
Yes
Check the SIM Card
END
No
Resolder or change SIM101
No
No
Check the U102
check the U102 & UCP201
1
2
3
2-7
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SGH-X660 Flow Chart of Troubleshooting
1
2-8
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2
SGH-X660 Flow Chart of Troubleshooting
3
2-9
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SGH-X660 Flow Chart of Troubleshooting
2-1-4. Microphone Part
Microphone does not work
Yes
The assembled status of
microphone is O.K
Yes
Check the reference voltage on mic path
Yes
The Voltage @ C420 is
about 2.0V
Yes
The microphone is O.K
Yes
END
No
No
No
Reassembled the microphone
Resolder or change
R410, R411, R412, R413, R414, R415, R416,
R417, R418, R424, C418, C421
Check U102
1
2-10
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SGH-X660 Flow Chart of Troubleshooting
MIC1P
MIC1N
MICINP
MICOUTP
MICINN
MICOUTN
VREGP
VREGN
R411
C439
R415
C440
R419
R423
C441
R412
R414
VCCA_2.9
R418
C423
R424
AGND
C418
C421
R416
R430
R410
R413
R417
R427
C419
MIC401
C420
AGND
C422
1
2-11
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1
SGH-X660 Flow Chart of Troubleshooting
2-1-5. Speaker Part
There is no sound from the Speaker
No
Check the
U402, U403
The terminal of Speaker is
There is any signal @ the
2
O.K
Yes
C505,C506
No
Yes
There is any signal
@ C403, C404
Yes Yes
The pin#4 of
U401 is "High"
Yes
No
Yes
Thetypeofsound
from the Speaker is
Melody
4
No
Replace the Speaker
Check LCD or Replace HDC501
No
There is any signal
@ R439, R440
1
No
Check the
U102
3
Check the UCP201
Check the U403
END
2-12
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