This Service Manual is a property of Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.
ⓒ
Samsung Electronics Co.,Ltd. April. 2006
Printed in Korea.
Code No.: GH68-11168A
BASIC.
1. Specification
1-1. GSM General Specification
EGSM900DCS1800PCS1900W-CDMA
Freq.
Band[MHz]
Uplink/Downlink
ARFCN range
Tx/Rx spacing45MHz95MHz80MHz190MHz
Mod. Bit rate/
Bit Period
Time Slot
Period/Frame
Period
Modulation0.3GMSK0.3GMSK0.3GMSK
MS Power33dBm~5dBm30dBm~0dBm30dBm~0dBm24dBm ~ - 50dBm
Power Class
890~915
935~960
0~124 &
975~1023
270.833kbps
3.692us
576.9us
4.615ms
4
(max +33dBm)1(max +30dBm)1(max +30dBm)
1710~1785
1805~1880
512~885512~810
270.833kbps
3.692us
576.9us
4.615ms
1850~1910
1930~1990
270.833kbps
3.692us
576.9us
4.615ms
1920~1980
2110~2170
UL:9612~9888
DL:10562~10838
3.84Mcps
Frame length : 10ms
QPSK
HQPSK
3
(max +24dBm)
Sensitivity-102dBm-100dBm-100dBm-106.7dBm
TDMA Mux888
Cell Radius35Km2Km2Km2Km
1-1
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Specification
1-2. GSM TX power class
TX Power
control level
533±2dBm
631±2dBm
729±2dBm
827±2dBm
925±2dBm
1023±2 dBm
1121±2 dBm
GSM900
TX Power
control level
030±3dBm
128±3dBm
226±3dBm
324±3dBm
422±3dBm
520±3dBm
618±3dBm
DCS1800
TX Power
control level
030±3dBm
128±3dBm
226±3dBm
324±3dBm
422±3dBm
520±3dBm
618±3dBm
PCS1800
1219±2 dBm
1317±2 dBm
1415±2 dBm
1513±2 dBm
1611±3 dBm
179±3dBm
187±3 dBm
195±3 dBm
716±3dBm
814±3dBm
912±4dBm
1010±4 dBm
118±4dBm
126±4 dBm
134±4 dBm
142±5 dBm
716±3dBm
814±3dBm
912±4dBm
1010±4 dBm
118±4dBm
126±4 dBm
134±4 dBm
142±5 dBm
150±5 dBm
1-2
150±5 dBm
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2. Circuit Description
2-1. SGH-Z150 RF Circuit Description
- Antenna Switch Module (U600)
The antenna switch module allows multiple operating bands and modes to share the same antenna. A common
antenna connects to one of seven paths: 1) UMTS-2100 Rx/Tx, 2) EGSM-900 Rx, 3) EGSM-900 Tx, 4) DCS-1800
Rx, and 5) DCS-1800 Tx. 6) PCS-1900 Tx, 7) PCS-1900 Rx, UMTS operation requires simultaneous reception and
transmission.
- Filter
To convert Electromagnetic Field Wave to Acoustic Wave and then pass the specific frequency band.
· GSM Rx FILTER (F600)→For filtering the frequency band between 925 and 960 MHz.
· DCS Rx FILTER (F601)→For filtering the frequency band between 1805 and 1880 MHz.
· PCS Rx FILTER (F602)→For filtering the frequency band between 1930 and 1990 MHz.
· WCDMA Rx FILTER (F700)→For filtering the frequency band between 2110 and 2170 MHz.
· WCDMA Tx FILTER (F701)→For filtering the frequency band between 1920 and 1980 MHz.
- VCTCXO (TCX700)
To generate the 19.2MHz reference clock to drive the logic and RF.
-Duplexer(F702)
A duplexer splits a single operating band into receive and transmit paths.
- WCDMA PAM (PAM702)
This is a key component in the transmitter chain and must complement the RTR6200 IC precisely; jointly they
dominate the UMTS transmitter performance characteristics. Parameters such as gain, output power level, ACLR,
harmonics, Rx-band noise, and power supply current are critical.
- GSM/DCS/PCS PAM (PAM602)
The PAM is a key component in any transmitter chain and must complement the rest of the transmitter precisely.
For GSM, DCS, PCS operation, the closed-loop transmit power control functions add even more requirements relative
to the UMTS PA. In addition to gain control and switching requirements, the usual RF parameters such as gain,
output power level, several output spectrum requirements, and power supply current are critical.
- GSM/DCS/PCS Dual Tx VCO (VCO600)
The dual Tx VCO outputs, one for EGSM and one for DCS/PCS, drive a resistive network that splits the active
signal into two signals: 1) the input to the active PAM which is the low loss path, and 2) the OPLL feedback signal.
- RFR6250 (U701)
The RFR6250 provides the Zero-IF receiver signal path, from RF to analog baseband, for UMTS-2100 applications.
The RFR6250 includes an LNA circuit optimized for UMTS-2100 operation and a VCO which generate UMTS Rx LO
signal. The RFR6250 accepts its UMTS input signal from the handset RF front-end design. The UMTS input is
configured differentially to optimize second-order inter-modulation and common mode rejection performance, and
implements MSM-controlled gain adjustments to extend the receiver dynamic range.
2-1
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Circuit Description
- RTR6250 (U601)
The RTR6250 supports multi-band, multi-mode phones with two receiver signal paths and three transmitter signal
paths:
1) Receiver paths
- EGSM-900
- DCS-1800
- PCS-1900
2) Transmitter paths
- EGSM-900 (using OPLL technique)
- DCS-1800 (using OPLL technique)
- PCS-1900
- UMTS-2100
Numerous secondary functions are integrated on-chip as well:
3) Phase-locked loop circuits
- PLL and an external VCO supports EGSM Rx and Tx, DCS Rx and Tx, DCS Rx and Tx and UMTS Tx
4) Transceiver LO generation and distribution circuits
- EGSM-900 Rx and Tx
- DCS-1800 Rx and Tx
- PCS-1900 Rx and Tx
- UMTS-2100 Tx
2-2
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Circuit Description
2-2. SGH-Z150 Baseband Circuit description
2-2-1. PM6650-2
- Power Management
Ten low-dropout regulators designed specifically for GSM applications power the terminal and help ensure optimal
system performance and long battery life. It provides seven LDO support for 1.375V, 1.8V, 2.6V, 2.85V, 3.0V, 3.3V
while a self-resetting, electronically fused switch supplies power to external accessories. Ancillary support functions,
such as RTC module and RTC charger, Clock Buffer, aid in reducing both board area and system complexity.
SBI BUS serial interface provides access to control and configuration registers. This interface gives full control of the
MSM6250A and enables system designers to maximize both standby and talk times.
Supervisory functions. including a reset generator, an input voltage monitor, and a ADC Conertte support reliable
system design. These functions work together to ensure proper system behavior during start-up or in the event of a
fault condition(low microprocessor voltage, insufficient battery energy, or excessive die temperature).
- TCXO Controller and Buffers
The PM6650-2 IC includes circuits for controlling the TCXO warm-up and buffering its signal for distribution
throughout the handset. Performance specifications are presented below.
2-2-2. Connector
- LCD Connector
LCD has 1.9", 176x220 resolution (color 260K TFT LCD). Chip select signals in MSM6250A, MAIN_LCD_CS can
enable main LCD and MAIN_LCD_BACKLIGHT enables white LED of main LCD. nRESET_LCD signal initiates the
reset process of the main LCD.
-Key
This is consisted of key interface pins among MSM6250A IC, KYPD_N(9,11,13,15,17) and KEYSENSE(0:3). These
signals compose the matrix. Result of matrix informs the key status to key interface in the MSM6250A. Power on/off
key(PHONE_ON) is separated from the matrix. The key LED use the "VREG_KEY_LED" supply voltage.
- ESD Filter
This system uses the ESD filter(GMF05LC) and ESD-EMI filter(ICVE21184E070R101FR) to protect noise from
CONNECTORs and part.
- IF connetor
It is 20-pin connector and is compatibly used for IF connector or EAR-JACK. They are designed to use VBATT,
C813C-CER,CHIP2203-005719SA
CN400HEADER-BOARD TO BOARD3711-005643SA
CN402CONNECTOR-FPC/FFC/PIC3708-002162SA
CN600CONNECTOR-COAXIAL3705-001358SA
CN601CONNECTOR-COAXIAL3705-001339SNA
CN802HEADER-BOARD TO BOARD3711-005345SA