Manual

Transcription

Manual

GSM TELEPHONE
SGH-N620E
SERVICE
GSM TELEPHONE
Manual
CONTENTS
1.
Specification
2.
Circuit Description
3.
Exploded Views and Parts List
4.
Electrical Parts List
5.
Block Diagrams
6.
PCB Diagrams
7.
Flow Chart of Troubleshooting
ELECTRONICS
ⓒ Samsung Electronics Co.,Ltd. February. 2003
Printed in Korea.
Code No.: GH68-04684A
BASIC.
1. SGH-N620E Specification
1. GSM General Specification
GS M 9 0 0
Ph a s e 1
EGS M 9 0 0
Ph a s e 2
DC S1 8 0 0
Ph a se 1
F r eq . B a n d [M Hz ]
Up l in k / Do w n li n k
8 9 0 ~9 1 5
9 3 5 ~9 6 0
880~890
925~935
1710~1785
1805~1880
A RF C N r a n g e
1 ~1 2 4
1 ~1 2 4 &
975~1023
512~885
T x /R x s p ac in g
4 5 MH z
4 5 MH z
9 5 MHz
Mo d . B i t r at e/
Bi t Pe r i o d
2 7 0 .8 3 3 k b p s
3 .6 9 2 u s
2 7 0 .8 3 3 k b p s
3 .6 9 2 u s
2 7 0 .8 3 3 k b p s
3 .6 9 2 u s
Ti me Sl o t
P er io d / F r am e P er i o d
5 7 6 .9 u s
4 . 6 1 5 ms
5 7 6 .9 u s
4 .6 1 5 ms
5 7 6 .9 u s
4 .6 1 5 ms
Mo d u l a ti o n
0 . 3 GMS K
0 . 3 GMS K
0 .3 G MS K
M S P o we r
3 3 d Bm ~5 d B m
33~5
3 0 d B m~ 0 d Bm
Po w er C l as s
5 p cl ~ 1 9 p c l
5~19
0pcl ~ 15pcl
Se n si t iv i t y
- 1 0 2 d Bm
-102dBm
-100dBm
TDM A M u x
8
8
8
C el l Ra d iu s
35Km
3 5 Km
2Km
1-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
SGH-N620E Specification
2. GSM TX power class
TX Power
control level
TX Power
GSM900
control level
DCS1800
5
33±2 dBm
0
30±3 dBm
6
31±2 dBm
1
28±3 dBm
7
29±2 dBm
2
26±3 dBm
8
27±2 dBm
3
24±3 dBm
9
25±2 dBm
4
22±3 dBm
10
23±2 dBm
5
20±3 dBm
11
21±2 dBm
6
18±3 dBm
12
19±2 dBm
7
16±3 dBm
13
17±2 dBm
8
14±3 dBm
14
15±2 dBm
9
12±4 dBm
15
13±2 dBm
10
10±4 dBm
16
11±3 dBm
11
8±4dBm
17
9±3dBm
12
6±4 dBm
18
7±3 dBm
13
4±4 dBm
19
5±3 dBm
14
2±5 dBm
15
0±5 dBm
1-2
2. SGH-N620E Circuit Description
1. SGH-N620E RF Circuit Description
1) RX PART
1. ASM(U301) → Switching Tx, Rx path for GSM900, DCS1800 by logic controlling.
2. ASM Control Logic (Q301,Q302,Q303) → Truth Table
VC1
VC2
GSM Tx Mode
L
H
DCS Tx Mode
H
L
GSM Rx Mode
L
L
DCS Rx Mode
L
L
3. FILTER
To convert Electromagnetic Field Wave to Acoustic Wave and then pass the specific frequency band.
- DCS FILTER (F301,C305,C307,L303) → For filtering the frequency band between 1805 ~ 1880 MHz
- GSM FILTER (F302,C210,C312,L306) → For filtering the frequency band between 925 ~ 960MHz
4. VC-TCXO (OSC301)
To generate the 13MHz reference clock to drive the logic and RF. After additional process, the reference clock applies to
the U304 Rx IQ demodulator and U302 Tx IQ modulator. The oscillator for RX IQ demodulator and Tx modulator are
controlled by serial data to select channel and use fast lock mode for GPRS high class operation.
5. Si 4200F (U302)
This chip integrates two differential-input LNAs.
The GSM input supports the E-GSM, DCS input supports the DCS1800. The LNA inputs are matched to the 200 ohm
differential output SAW filters through external LC matching network.
Image-reject mixer downconverts the RF signal to a 100 KHz intermediate frequency(IF) with the RFLO from SI4133T
frequency synthesizer. The RFLO frequency is between 1737.8 ~ 1989.9 MHz.
The Mixer output is amplified with an analog programmable gain amplifier(PGA), which is controlled by AGAIN.
The quadrature IF signal is digitized with high resolution A/D converts (ADC).
6. Si 4201BM (U304)
The SI4201BM down-converts the ADC output to baseband with a digital 100 KHz quadrature LO signal. Digital
decimation and IIR filters perform channel selection to remove blocking and reference interface signals.
After channel selection, the digital output is scaled with a digital PGA, which is controlled with the DGAIN. DACs drive
a differential analog signal onto the RXIP, RXIN, RXQP, RXQN pins to interface to standard analog-input baseband IC.
2) TX PART
Baseband IQ signal fed into offset PLL, this function is included inside of U305 chip. SI4200F chip generates modulator
signal which power level is about 6.5dBm and fed into Power Amplifier(U303). The PA output power and power ramping
are well controlled by Auto Power Control circuit. We use offset PLL below
2-1
SGH-N620E Circuit Description
Modulation Spectrum
200kHz offset
30 kHz bandwidth
GSM
-35dBc
DCS
-35dBc
400kHz offset
30 kHz bandwidth
GSM
-66dBc
DCS
-65dBc
600kHz ~ 1.8MHz offset
30 kHz bandwidth
GSM
-75dBc
DCS
-68dBc
2. Baseband Circuit description of SGH-N620E
1. Power Management
Four low-dropout regulators designed specifically for GSM applications power and help ensure optimal system performance
and long battery life. while a self-resetting, electronically fused switch supplies power to external accessories. Ancillary
support functions, such as RTC module and High Voltage Charge pump, Clock generator, aid in reducing both board area
and system complexity.
2. Clock Generator
The Clock Generator (CG) generates all clocks for internal and external usage. The 32768 Hz crystal oscillator provides an
accurate low clock frequency for the VP40578.
3. LCD
LCD is 4 grey LCD. Chip select signals in the U205, LCD_EN can enable LCD. B_LIGHT signal enables blue LED of
LCD. Blue LEDs use the 'LVCC' supply voltage.
"RST" signal initiates the Reset process of the LCD.
8-bit data lines(D(0)~D(7) transfers data and commands to LCD through bypass capacitor. Data and commands use
"A(0)" signal. If this signal is high, Inputs to LCD are commands. If it is low, Inputs to LCD are data. The signal which
informs the input or output state to LCD, is required. But this system is not necessary this signal. So "WR" signal is
used to write data or commands to LCD. Power signal for LCD is "VDD3.0".
4. Key
This is consisted of key interface pins among VP40578 (KEYBORD_ROW(0:7), KEYBOARD_COL(0:7)) . These signals
compose the matrix. Result of matrix informs the key status to key interface in the VP40578.
Eight key LEDs use the
"LED_3V3" supply voltage. "BACKLIGHT" signal enables LEDs with current control
5. IF connector
It is 18-pin connector. They are designed to use RS232_TXD, RS232_RXD, RS232_RTS, RS232_CTS, BOOT, SCL, SDA,
MIC2N, MIC2P, SPK2N, SPK2P, DCVOLT. They connected to power supply IC, microprocessor and signal processor IC.
6. Battery Charge Management
A complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries. If ta connected to phone,
"DCVOLT" enable charger IC and supply current to battery. when fault condition caused, "CHG_ON" signal level change
low to high and charger IC stop charging process.
7. Audio
SPK2P and SPK2N from VP40578 are connected to the main receiver. MIC2P and MIC2N are connected to the main
2-2
SGH-N620E Circuit Description
MIC.
YMU759, is a LSI for portable telephone that is capable of playing high quality music by utilizing FM synthesizer
and ADPCM decorder that are included in this device. As a synthesis, YMU759 is equipped 16 voices with different tones.
Since the device is capable of simultaneously generating up to synchronous with the play of the FM synthesizer, various
sampled voices can be used as sound effects. Since the play data of YMU759 are interpreted at anytime through FIFO,
the length of the data(playing period) is not limited, so the device can flexibly support application such as incoming call
melody music distribution service. The hardware sequencer built in this device allows playing of the complex music
without giving excessive load to the CPU of the portable telephones. Moreover, the registers of the FM synthesizer can be
operated directly for real time sound generation, allowing, for example, utilization of various sound effects when using the
game software installed in the portable telephone. YMU759 includes a speaker amplifier with high ripple removal rate
whose maximum output is 550mW (SPVDD=3.6V). The device is also equipped with conventional function including a
vibartor and a circuit for controlling LEDs synchornous with music. For the headphone, it is provided with a stereophonic
output terminal. For the purpose of enabling YMU759 to demonstrate its full capablities, Yamaha purpose to use
"SMAF:Synthetic music Mobile Application Format" as a data distribution format that is compatible with multimedia. Since
the SMAF takes a structure that sets importance on the synchronization between sound and images, various contents can
be written into it including incoming call melody with words that can be used for traning karaoke, and commercial
channel that combines texts, images and sounds, and others. The hardware sequencer of YMU759AE2 directly interprets
and plays blocks relevant to systhesis (playing music and reproducing ADPCM with FM synthesizer) that are included in
data distributed in SMAF.
8. Memory
Signals in the VP40578 enable two memories. They use only one volt supply voltage, VDD3. This system uses LRS1383.
It is consisted of 32M bits flash and 8M bits SRAM.. It has 16 bit data line, D[0~15] which is connected to VP40578. It
has 22 it address lines, HA[0~21]. FALSH1 and CSRAM signals is chip select.
9. VP40578
VP40578 is consisted of ARM core and DSP core. It has 8x1Kword on-chip program/data RAM, 55 Kwords on-chip
program ROM in the DSP. It has 4K*32bits ROM and 2K*32bits RAM in the ARM core. DSP is consisted of KBS,
JTAG, EMI and UART. ARM core is consisted of EMI, PIC(Programmable Interrupt Controller), reset/power/clock unit,
DMA controller, TIC(Test Interface Controller), eripheral bridge, PPI, SSI(Synchronous Serial Interface), ACC(Asynchronous
communications controllers), timer, ADC, RTC(Real-Time Clock) and keyboard interface.
KBIO(0:7), address lines of DSP core and HD[0~15]. HA[0~23], address lines of ARM core and HD[0~15], data lines of
ARM core are connected to memory, YMU759.
External IRQ(Interrupt ReQuest) signals from each units, such as, PMU need the compatible process.
KBIO[0~7] receive the status from key
It has JTAG control pins(TDI/TDO/TCK) for ARM core and DSP core. It recieves 13MHz clock in CKI pin from
external TCXO. ADC(Analog to Digital Convertor) part receives the status of temperature, battery type and battery voltage.
10. VC-TCXO(13MHz)
This system uses the 13MHz , VC-TCXO. Toyocom. AFC control signal form VP40578 controls frequency from 13MHz
x-tal. It generates the clock frequency. This clock is connected to VP40578, YMU762.
2-3
3. SGH-N620E Exploded View and its Parts list
1. Cellular phone Exploded View
3-1
SGH-N620E Exploded view and its Part list
2. Cellular phone Parts list
NO
1
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
2
3
4
4-1
4-2
4-3
4-4
5
6
7
8
9
9-1
9-2
9-3
9-4
9-5
9-6
10
11
12
13
14
15
16
17
18
19
SEC CODE
WHITE
FRONT COVER ASS'Y
GH75-03840A
FRONT COVER
GH72-10706A
LCD-SPONGE
GH74-06910A
DUMMY-SPEAKER
GH72-03218A
WINDOW-LCD
GH72-10710A
LENS LED
GH72-03217A
DUMMY-FRONT
GH72-03212A
DECORATION
GH72-03219A
METAL-MANGSA FRONT
GH74-06920A
COVER-LED
GH73-01049A
KEY PAD
GH75-03842A
FRAME-LCD
GH71-02536A
PBA
GH92-01653A
COVER-LCD
GH73-00923A
LCD-ASS'Y
GH07-00131A
PCB
INSULATION TAPE
GH74-05984A
KEY-VOLUME
GH75-01490A
IF-COVER
GH73-00893A
INSULATION TAPE
GH74-07032A
SHIELD-REAR
GH72-10708A
REAR COVER ASS'Y
GH75-03841A
REAR COVER
GH72-10707A
SPRING LOCKER
GH70-10516A
LOCKER MAIN
GH72-03116A
COVER EAR-PHONE
GH73-00894A
METAL-MANGSA REAR
GH74-06921A
WATERPROOF TAPE
GH68-02026A
SPEAKER
3001-001254
MOTOR
GH31-00033A
BUSHING ANT
GH71-00588A
ANTENNA
GH42-00137A->E
BATTERY-ASS'Y
GH43-00435A
MOBILE CAP
GH73-00892A
SCREW CAP
GH73-00891A
SCREW M1.7X5
6001-001346
MIC-RUBBER
GH73-02596A
FRONT TOTAL ASS'Y
GH97-03134A
DESCRIPTION
Q'TY
SVC REMARK
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
1
1
1
1
1
1
1
5
1
1
3-2
SGH-N620E Exploded view and its Part list
3. Test Jig (GH80-10508A)
3-1. RF Test Cable
3-2. Test Cable
(GH39-00174A)
3-3. Serial Cable
(GH39-00079A)
3-4. Power Supply Cable
3-5. DATA CABLE
(GH39-00078A)
3-6. TA
(GH44-00184G)
3-3
4. SGH-N620E MAIN Electrical Parts List
SEC Code
Design LOC
SEC Code
Design LOC
0401-001110
D101
1203-002766
U102
0403-001387
ZD104
1203-003004
U106
0403-001427
ZD105
1204-001811
U107
0404-001172
D301
1205-002035
U205
0406-001104
ZD101
1205-002185
U304
0406-001104
ZD102
1205-002268
U302
0406-001104
ZD103
1209-001434
U305
0407-001007
D104
1404-001221
V103
0501-000162
Q201
1405-001082
V106
0501-000225
Q304
1405-001082
V107
0501-002011
Q105
1405-001082
V108
0502-001201
Q100
1405-001082
V200
0504-001174
Q301
1405-001082
V201
0504-001174
Q302
1405-001082
V202
0504-001174
Q303
1405-001082
V203
0505-001423
U105
1405-001082
V204
0506-001004
U104
1405-001082
V205
0601-001543
LED110
1405-001082
V206
0601-001611
LED101
1405-001082
V207
0601-001611
LED104
1405-001082
V208
0601-001647
LED102
1405-001082
V209
0601-001647
LED105
1405-001093
V209
0601-001647
LED106
2007-000138
R111
0601-001647
LED107
2007-000139
R106
0601-001647
LED108
2007-000140
R136
0601-001647
LED109
2007-000140
R324
0801-002540
U203
2007-000140
U637
0801-002540
U204
2007-000141
R237
1001-001145
U207
2007-000141
R238
1103-001440
U109
2007-000141
R316
1103-001288
U208
2007-000143
R144
1109-001204
U201
2007-000143
R147
1201-001954
U103
2007-000148
R135
1202-001036
U210
2007-000148
R201
1203-002077
U101
2007-000148
R203
1203-002187
U209
2007-000148
R222
1203-002598
U104
2007-000148
R223
4-1
SGH-N620E Electrical Parts List
SEC Code
Design LOC
SEC Code
Design LOC
2007-000148
R225
2007-000170
R116
2007-000148
R305
2007-000170
R249
2007-000148
R314
2007-000171
R206
2007-000151
R217
2007-000171
R309
2007-000152
R229
2007-000172
R108
2007-000152
R323
2007-000172
R109
2007-000155
R321
2007-000172
R112
2007-000157
R101
2007-000172
R113
2007-000157
R125
2007-000172
R302
2007-000157
R232
2007-000172
R242
2007-000162
R102
2007-000174
R127
2007-000162
R119
2007-000174
R130
2007-000162
R120
2007-000174
R131
2007-000162
R121
2007-000174
R132
2007-000162
R122
2007-000174
R133
2007-000162
R123
2007-000174
R134
2007-000162
R124
2007-000566
R118
2007-000162
R137
2007-001119
R320
2007-000162
R138
2007-001244
R315
2007-000162
R139
2007-001288
R306
2007-000162
R202
2007-001298
R317
2007-000162
R204
2007-001298
R325
2007-000162
R205
2007-001298
R326
2007-000162
R211
2007-001301
R105
2007-000162
R213
2007-001301
R126
2007-000162
R214
2007-001301
R129
2007-000162
R218
2007-001319
R142
2007-000162
R220
2007-001325
R141
2007-000162
R221
2007-001325
R143
2007-000162
R224
2007-002796
R230
2007-000162
R226
2007-002796
R231
2007-000162
R227
2007-002796
R235
2007-000162
R228
2007-002796
R236
2007-000162
R233
2007-007008
R307
2007-000162
R241
2007-007008
R308
2007-000162
R242
2007-007095
R145
2007-000168
R234
2007-007095
R303
4-2
SEC Code
Design LOC
SEC Code
Design LOC
2007-007095
R304
2203-000254
C242
2007-007107
R104
2203-000254
C243
2007-007107
R318
2203-000254
C247
2007-007107
R319
2203-000254
C251
2007-007309
R312
2203-000254
C334
2007-007309
R313
2203-000254
C335
2007-007311
R310
2203-000359
C206
2007-007311
R313
2203-000359
C207
2007-007318
R212
2203-000359
C208
2007-007318
R215
2203-000359
C209
2007-007318
R216
2203-000386
C157
2007-007318
R219
2203-000438
C152
2007-007334
R251
2203-000438
C328
2007-007529
R252
2203-000585
C161
2007-007538
R117
2203-000609
C126
2007-007573
R247
2203-000628
C313
2007-007590
R146
2203-000628
C314
2007-007698
R207
2203-000679
C105
2007-007698
R208
2203-000679
C108
2007-007698
R209
2203-000679
C110
2007-007698
R210
2203-000679
C111
2007-007981
R248
2203-000679
C141
2007-008117
R103
2203-000679
C142
2011-001344
R140
2203-000679
C145
2011-001345
R246
2203-000679
C153
2203-000233
C308
2203-000679
C205
2203-000233
C309
2203-000679
C215
2203-000233
C320
2203-000679
C217
2203-000233
C325
2203-000679
C218
2203-000233
C329
2203-000679
C225
2203-000233
C338
2203-000679
C230
2203-000254
C106
2203-000679
C332
2203-000254
C107
2203-000679
C336
2203-000254
C134
2203-000679
C337
2203-000254
C136
2203-000679
U601
2203-000254
C212
2203-000812
C213
2203-000254
C241
2203-000812
C236
4-3
SEC Code
Design LOC
SEC Code
Design LOC
2203-000812
C237
2203-005061
C122
2203-000812
C244
2203-005061
C123
2203-000812
C245
2203-005061
C124
2203-000812
C246
2203-005061
C125
2203-000812
C249
2203-005061
C129
2203-000812
C250
2203-005061
C132
2203-000812
C306
2203-005061
C135
2203-000812
C315
2203-005061
C137
2203-000812
C319
2203-005061
C139
2203-000812
C321
2203-005061
C143
2203-000854
C214
2203-005061
C149
2203-000854
C226
2203-005061
C150
2203-000854
C228
2203-005061
C151
2203-000854
C234
2203-005061
C158
2203-000854
C235
2203-005061
C201
2203-000995
C220
2203-005061
C202
2203-001017
C227
2203-005061
C203
2203-001017
C229
2203-005061
U640
2203-001072
C311
2203-005065
C101
2203-001101
C128
2203-005065
C138
2203-001153
C148
2203-005065
C146
2203-001383
C304
2203-005065
C159
2203-001405
C301
2203-005234
C305
2203-001405
C302
2203-005234
C307
2203-001405
C316
2203-005444
C231
2203-001405
C317
2203-005444
C303
2203-001405
C318
2203-005480
C219
2203-001405
C324
2203-005480
C224
2203-001405
C330
2203-005481
C233
2203-001405
C331
2203-005482
C154
2203-003054
C131
2203-005482
C163
2203-003054
C204
2203-005503
C213
2203-003054
C248
2203-005503
C211
2203-005050
C310
2203-005664
C117
2203-005050
C312
2203-005664
C130
2203-005061
C104
2203-005664
C133
2203-005061
C118
2203-005840
C113
4-4
SEC Code
Design LOC
SEC Code
Design LOC
2203-005840
C114
3404-001152
SW102
2203-005840
C116
3705-001242
CN301
2203-005840
C119
3709-001263
CN101
2203-005840
C121
3710-001105
CN104
2203-006053
C127
3710-001105
CN105
2203-006093
C109
3710-001595
CN103
2203-006105
C155
3722-001715
CN200
2203-006190
C162
4302-001130
U636
2404-001101
C115
GH61-00026A
ANT301
2404-001105
C103
2404-001105
C140
2404-001105
C144
2404-001105
C322
2404-001239
C102
2404-001239
C221
2404-001239
C323
2404-001268
C160
2503-001053
CA100
2503-001053
CA101
2703-001723
L304
2703-001723
L305
2703-001747
L302
2703-001749
L311
2703-001752
L102
2703-001938
L310
2703-002205
L309
2703-002484
L303
2703-002485
L306
2801-003747
OSC201
2809-001264
OSC301
2901-001116
F101
2901-001254
L120
2904-001417
F302
2904-001470
F301
2909-001197
U301
3301-001362
L101
3404-001152
SW101
4-5
5. SGH-N620E Block Diagrams
1. Main Baseband
SIM CARD
BB INTERFACE
SERIAL DATA
INTERFACE
BATTERY TYPE
I/O
INTERFACE
MIC
SPEAKER
ONE C
SYSTEM CLOCK
(13MHz)
BATTERY
VOLTAGE
A/D
INTERFACE
PHONE
TEMPRATURE
RF INTERFACE
CHARGING
CURRENT
AFC
XVCC
SRAM
PLL
FLASH
3VRF
Li-ion BATT
(STANDARD)
VDD3.0
AVCC2.5
EEPROM
RTC_CLOCK
(32.768KHz)
CHARGING
CIRCUIT
LVCC
KEYPAD
RTC_VCC
LCD
LED3V3
5-1
SGH-N620E Block Diagrams
2. Main RF
Si4201-BM (U304)
SI4200F (U302)
EGSM RX
925~960 MHz
(CH62:947.4MHz)
/
PGA
/
/
PGA
F301
SAW
FILTER
/
PGA
/
/
PGA
ADC
/
/
ADC
/
/
/
PGA
/
DAC
I
/
PGA
/
DAC
Q
CHANNEL
FILTER
DCS RX
1805~1880 MHz
(CH698:1842.4M
Hz)
F302
SAW
FILTER
/
100KH
z
CN301
RF
CONNECTOR
U301
ANTTENA
S/W
VP40578
Si4133T-BM (U305)
RF
PLL
IF
PLL
OSC301
VCTCXO
AFC
DCS TX
1710 ~ 1785 MHz
(CH698:1747.4MHz)
Dual PAM (U303)
PD
I
LPF
GSM TX
880 ~ 915 MHz
(CH62:902.4MH
z)
Q
5-2
3. RF Transmit Part
3VRI
BANDSEL
_BANDSEL
ANT. S/W
CONTROL
CIRCUIT
TXEN
from U 205
①
VC1
VC2
Tx(GSM)
L
H
Tx(DCS)
H
L
Rx
L
L
Si4133T-BM ( U305)
23,24
2
<EGSM>
1279 ~ 1314 MHz
<DCS>
1327 ~ 1402 MHz
RF
PLL
11
7
CN301
RF
CONNECTOR
U301
ANTTENA
S/W
<EGSM>
880 ~ 895 MHz : 798 MHz
895 ~ 900 MHz : 790 MHz
900 ~ 915 MHz l 798 MHz
<DCS>
766 MHz
IF
PLL
2
OSC301
VCTCXO
EGSM TX
880 ~ 915 MHz
(CH62:902.4MHz)
DCS TX
1710 ~ 1785 MHz
(CH698:1747.4MHz)
VP40578
-6dBm
@798 MHz
-9dBm
@766 MHz
9,10
12,13
AFC
PDNB
9
26,27
-6dBm
@1301.4 MHz (G)
-9dBm
@1364.4 mhZ (D)
4
31
J2
Dual PAM (U303)
5
24
PD
7
9
25
LPF
7
8
I
8
6
7
?
6
1
Q
Si4200-F (U302)
SDATA
SCLK
SENB
PDNB
+VBATT
Tx power
from U 205
3VRF
②
TxPower ②
TXEN ①
BAND SELECTION
VREG
5-3
4. RF Receive Part
Si4200F (U302)
Si4201-BM (U304)
④
-52dBm
21,22
LNA
/
/
PGA
/
11,12
/
/
17,18
3,4
LNA
/
/
PGA
/
1,2
ADC
PGA
/
DAC
CHANNEL
FILTER
Mixer
-52dBm
①
5
1,2
ADC
11,12
/
I
4
-50dBm
-54dBm
@67KHz
3
/
PGA
/
DAC
Q
2
SDATA
SCLK
SENB
3,4
F302
SAW
FILT
ER
-51dBm
1
EGSM RX
925 ~ 960 MHz
(CH62:947.4 MHz)
F301
SAW
FILT
ER
GSM : /2
100
KHz
12,13
7
31
VP40578
(U205)
14
-50dBm
1
DCS RX
1805 ~ 1880 MHz
(CH62:1842.4 MHz)
PDNB ②
-6dBm
@1895.6 MHz (G)
-9dBm
@1842.3 MHz (D)
10
1
9
23,24
2
CN301
RF
CONNECTOR
-50dBm
@947.067 MHz
-50dBm
@1842.467 MHz
3
8
U301
ANTTENA
S/W
RF
PLL
<EGSM>
1849.8 ~ 1919.8 MHz
<DCS>
1804.9 ~ 1879.9 MHz
7
2
Si4133T-BM (U305)
5-4
OSC301
VCTCXO
4
AFC ③
6. SGH-N620E PCB Diagrams
1. Main PCB Top Diagram
6-1
SGH-N620E PCB Diagrams
2. Main PCB Bottom Diagram
6-2
7. SGH-N620E Flow Chart of Troubleshooting
1. Power On
' Power On ' does not work
Check the Battery Voltage
is more than 3.2V?
No
Change the Battery
Yes
WHen the "END" key is
pressed, the voltage of
"D104" pin is 3.6V?
No
Check the Dome sheet
Yes
U102 pin 10
U103 pin 5 ≠ 2.5V
No
Check the circuit related to
U102,U103
Yes
U101 pin 5 ≠ 3.3V
U102 pin 3 ≠ 3.0V
No
Check U101, U102 and related circuit
Yes
Check for the clock signal at
R320
No
Check the clock generation circuit
(related to OSC301 and Q304)
Yes
Check the initial operation
END
7-1
SGH-N620E Flow Chart of Troubleshooting
Power On
7-2
' Power On ' does not work
Yes
Downloading SW is
OK??
(IS CSROM signal
OK?)
No
After power on,
check and repair the important
signals of U209 as follos
The node between
R217 and C212 =
"H" (RST)
No
Check the circuit
related to reset
Yes
No
R221 = "H" (BOOT)
Resolder R221
Yes
Check all the other
connection by thes S/W
No
R234 = "H" (MSIZE)
Resolder R234
Yes
Check the circuit around
LCD
R233 = "L"
(EXTPROC)
Check the circuit around
U300(EEPROM) and data
stored in it
Replace PBA
No
END
7-3
Resolder R233
Initial
U205
U300
U209
R217
SYSRST
CSROM
_CE
VCC
C212
VCC
MSIZE
R221
BOOT
GPIO3
7-4
3. Charging Part
Abnormal charging part
No
Check the CN103
pin 17, 18 > 4.9V
Replace TA
Yes
No
Check the U106 pin 3 > 4.9V
Resolder U106
Yes
No
R103 (CHG_OIN side) = "L"
Resolder R103
Yes
No
Check Q014 pin 5 ≠ 4.2V
Resolder components around U106
Yes
END
7-5
Charging
7-6
4. Sim Part
Phone can't access SIM Card
No
U105 pin 4 = 3.0 V?
Check the circuit around U102
Yes
No
U105 pin 5 = "H" ?
Replace U105 or replace PBA
Yes
No
U105 pin 2,3 = 3.0 V ?
Replace U105
Yes
No
After power on, check SIMCLK
signal on CN101 pin 3 in a few
seconds
Resoldering C108 or Replace
Yes
No
After SIM card insert, CN101 pin
2 = "H" (SIMRST)?
Replace PBA
Yes
Check the circuit around U208 (Serial EEPROM)
and datad stored in it
END
7-7
5. Microphone Part
Microphone does not work
No
CN200 pin 4, 5 = short ?
Resolder CN200
Yes
No
U102 pin 10 (AVCC) ≠ 2.5 V ?
Check the circuit related to U102
Yes
No
Check the circuit RC Filer to
MIC201
Resolder the
R230, R231, R220, R236
C219, C220, C221, C252
Yes
No
Replace the MIC or MIC Holder
Check soldering of MIC Module
Yes
END
7-8
Microphone
MIC-
U205
7-9
MICVXO1N
VXO1P
MIC+
RC
FILTER
5
1
CN200
4
MIC+
MIC201
SIM
6. Receiver Part
Receiver does not work
Yes
No
Resolder CN200
CN200 pin 2,3 = short
Yes
No
Replace the PBA
CN200 pin 2,3,6 = 1.5V
Yes
No
Replace the Receiver
Is Receiver working?
Yes
END
7-10
7. Speaker Part(Melody)
Speaker does not work
No
CN105 connected
Speaker?
Connect CN105 and Speaker
Yes
No
Is Speaker working?
Replace the Speaker
Yes
No
U107 pin 7 = 3.0V
Replace the U102
Yes
END
7-11
MEL_13M
M_IRQ
M_LED
M_RESET
C152
1NF
R141
VDD3.0
C150
100NF
R138
100K
R139
100K
3.3K
CLKI
EXT1
/IRQ
/RST
IFSEL
PLLC
VDD
VSS
VREF
C151
100NF
U107
YMU759-QE2
D2
D3
D4
D5
D6
D7
EXT2
SPOUT2
SPOUT1
17
R145
1.2K
C161
220PF
C158
100NF
C155
4.7UF
6.3V
+VBATT
C162
220NF
V106
VC040205X150R
C157
15PF
CN105
1
2
L_SPK-
L_SPK+
LOUD SPEARK
24-8005-002-000-867
7-12
RD
A(1)
M_CS
WR
D(0)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
VIBRATOR
C153
27PF
U631
27PF
V108
VC040205X150R
LINE_OUT
27
R143
3.3K
25
24
23
22
21
20
19
18
26
D1
SPVSS
16
D0
15
EQ3
14
EQ2
13
32
C154
100NF
R142
1.2K
12
SPVDD
28
/WR
29
SDIN
30
SYNC
EQ1
31
SCLK
HPOUTR
11
SDOUT
HPOUT-L/MON
O
10
1
2
3
4
5
6
7
8
9
8. Key Data Input
Check initial operation
Yes
No
When one of the keys is
pushed, is it displayed on
LCD
Check the Dome sheet
Yes
No
Replace the PBA
Keypad is OK?
Yes
END
7-13
9. Key Backlight
Backlight does not work
No
Backlight "ON" mode in the
menu?
Select backlight "ON" mode
Yes
No
R136 = "H" ?
GPIO5 by TEST S/W
Yes
No
Q105 pin 3 = "L"
Resolder R136, R137,
or Resolder Q105
Yes
No
KEY PCB LED on?
Resolder R126, R127, R129, R130,
R131, R132, R133, R134
Yes
END
7-14
10.Ring Indicator
Ring indicator LED does not work
Yes
No
Resolder U102
U102 pin 12 = "H"
Yes
No
Replace 3 color LED
Resolder 3 color LED
Yes
END
7-15
11. GSM Receiver
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
No
U301 Pin8
>= -50dBm
Resolder U301
Yes
No
U301 pin10
>= -53dBm
Check
VC1 = L, VC2 =L
No
Check ANT Switch
control circuit
Yes
Yes
Resoder U301
No
F302 pin1
>= -70dBm
Resolder C313
Yes
No
U302
pin 21, 22
Resolder
F302, C310, C312, L306
Yes
No
U302 pin6, 1, 2
>= 50mV
Check U302
pin 12, 13
[(Freq-1000KHz)*
2]>=-6dBm OK?
No
Chekc & Resolder
I/O signal, RF13MHz,
RF_PSU Part
Yes
Yes
Check U302
pin 12, 13
[(Freq-1000KHz)*
No
Yes
Resolder U302
Check U304 pin
14,16,17,18 > OK?
U304 pin 2,3,4,5
> 100mV
Check U304 pin
7, 20 OK?
Yes
Check Radio PSU,
RF13MNz part
Resolder U205
END
7-16
Resolder U304
12. GSM Transmitter
TX ON (5Level)
Yes
Yes
U301 Pin 8
≠30dBm
Resolder U301
No
Yes
U301 pin5
≠ 30dBm
Check U100
VC1 : L
VC2 : H
Yes
No
No
Yes
U303 pin 7
≠ 30dBm
Change or Resolder U301
Check ANT Switch
control circuit
Resolder C308
No
Yes
U303 pin7
≠ 0dBm
Check U303,
+VBATT, pin2, 5,
6 OK?
Yes
No
Check +VBATT or PAM
control signal
No
Yes
U302 pin 25
≠ 0dBm
Resolder or Change U303
Resolder
R306 R307 R308, C321
No
U302 pin 5, 6, 7,
8 ≠ 40mV
Yes
Check U302
pin9, 10, 12, 13 ≠
-6dBm OK?
No
Yes
Check and Resolder
I/O signal RF 13MHz,
RF PSU part
Yes
Resolder U303
Check U302
pin9, 10, 12, 13 ≠
-6dBm OK?
No
Yes
Resolder U302
END
7-17
13. DCS Receiver
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
No
U301 Pin8
>= -50dBm
Resolder
CN301,C306
Yes
Check
VC1 = L,
VC2 = L
No
U301 pin1
>= -53dBm
No
Check ANT Switch
control circuit
Yes
Yes
Resoder U301
No
F301 pin1
>= -53dBm
Resolder C314
Yes
No
U302
pin 17, 18
>= -58dBm
Resolder
F302, C305, C307, L303
Yes
Check U302
pin 12, 13
(Freq-1000KHz)
>=-6dBm
OK?
No
U302 pin 1, 2
>= 50mV
No
Chekc & Resolder
I/O signal, RF13MHz,
RF_PSU Part
Yes
Yes
Check U302
pin 45,23,31,32
>2.7
No
Yes
U304
pin 2,3,4,5
> 100mV
Yes
No
Check
U304
pin14.16,17,
18 OK?
Yes
No
Resolder U302
Check
U304
pin 7,20
OK?
Yes
No
Resolder U205
END
7-18
Resolder
U304
Check
Racio PSU
RF13MHz part
14. DCS Transmitter
TX ON (0Level)
Yes
Yes
U302 Pin8
>= 25dBm
Resolder CN301
No
Yes
Check
VC1 : H
VC2 : L
U301 pin3
>= 25dBm
Yes
No
No
Yes
U303 pin11
>= 25dBm
Change or Resolder U301
Check ANT Switch
control circuit
Resolder C311
No
Yes
U303 pin1
>= 0dBm
Check U303
+VBATT, pin2,5,8
OK?
Yes
No
Resolder or Change U303
Check +VBATT or PAM
control signal
No
Yes
U302 pin24
>= 0dBm
Resolder R302,R303,R304,C315
No
U302 pin5, 6, 7, 8
>= 40mV
Yes
Check U302
pin9,10,12,13 >=
-6dBm
OK?
No
Check & Resolder
I/O signal, RF 13MHz
Yes
Resolder U301
Check U302
pin9,10,12,13 >=
-6dBm
OK?
No
END
Resolder U302
7-19
Transmitter
7-20

Manual

Transcription

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