This document contains specifications, circuit description, exploded views and parts list, electrical parts list, block diagrams, PCB diagrams, troubleshooting flow chart, and disassembly and assembly instructions for the GSM telephone SGH-i750.
This service manual provides detailed technical information for the Samsung SGH-i750 GSM telephone. It includes specifications, circuit descriptions, exploded views, parts lists, block and PCB diagrams, troubleshooting flow charts, and step‑by‑step disassembly and assembly instructions.
The document is organized into sections such as Specification, Circuit Description, Power Supply, Logic Circuit, Audio Part, PDA Part, and Backup Battery details, allowing technicians to diagnose faults, replace components, and understand the phone's internal architecture.
| Supported GSM bands | GSM900, EGSM900, DCS1800, PCS1900 |
|---|---|
| Uplink frequency range | 890~915 MHz (GSM900), 880~915 MHz (EGSM900), 1710~1785 MHz (DCS1800), 1850~1910 MHz (PCS1900) |
| Downlink frequency range | 935~960 MHz (GSM900), 925~960 MHz (EGSM900), 1805~1880 MHz (DCS1800), 1930~1990 MHz (PCS1900) |
| Modulation | 0.3 GMSK |
| TX power class | 33 dBm ~ 5 dBm |
| Receiver sensitivity | -102 dBm |
| Processor | Intel® PXA270 |
| SDRAM capacity | 4 MByte |
| Backup battery model | ML1220‑TT2 |
It supports GSM900, EGSM900, DCS1800 and PCS1900 bands.
Eight low‑dropout regulators are used for GSM applications.
The phone uses a backup battery model ML1220‑TT2.
The PDA part is based on an Intel® PXA270 processor.