Samsung SCH-811 service manual.pdf

CDMA CELLULAR

TELEPHONE

SCH-811

SERVICE

Manual

CDMA CELLULAR TELEPHONE

CONTENTS

1. General Introduction

2. Specification

3. Installation

4. NAM Programming

5. Product Support Tools

6. Troubleshooting

7. Exploded view and its Part List

8. Electrical Parts List

9. PCB diagrams

10. Block & circuit diagrams

SAMSUNG PROPRIETARY-CONTENTS MAY CHANGE WITHOUT NOTICE

ELECTRONICS

Samsung Electronics Co.,Ltd.

GH68-00398A

1999. 3. REV. 1.0

1. General Description

The SCH-811 cellular phone functions as both analog cellular phone working in AMPS (Advanced Mobile

Phone Service) mode and digital cellular phone working in CDMA (Code Division Multiple Access) mode.

CDMA type digital mode applies DSSS (Direct Sequential Spread spectrum) mode which first came to be used

in the military.

The DSSS reduces channel cross talk and allow to use one frequency channel by multiple users in the same

specific area, resulting in increase of channel capacity to about ten times compared to that of analog mode

currently used.

Soft/Softer Handoff, Hard Handoff, and Dynamic RF Power Control technologies are combined into this phone

to reduce the call drop while usage.

CDMA digital cellular network consists of MSO (Mobile Switching Office), BSC (Base Station Controller),

BTS(Base Station Transmission System), and MS (Mobile Station). MS meets the specifications of the below:

IS-95A : Mobile Station-Base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum

Cellular System

IS-96A : Speech Service Option 1 Standard for Dual-Mode Wideband Spread Spectrum Cellular Systems

IS-98A : Standards for Dual-Mode Wideband Spread Spectrum Cellular Mobile Station

IS-126 : Mobile Station Loopback Service Options Standard

SCH-811 is composed of main handset, rapid charger, three batteries (1600 mAh, 1000 mAh, 550mAh), hands-

free kit, car adaptor, and travel charger. Hands-Free Kit is designed to be operated in full-duplex mode taking

turn-around delay between the phone and the system into account.

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1-1

2. Specification

2-1 General

Frequency Range

Digital Mode

Analog Mode

Transmitter

: 824 ~ 849 MHz

824 ~ 849 MHz

Receiver

: 869 ~ 894 MHz

869 ~ 894 MHz

Channel Spacing

: 1.23 MHz

30kHz

Number of Channels

: 20 FA

832CHs

Duplex Spacing

: 45 MHz

45MHz

Frequency Stability

: °2.5 ppm (-20úC ~ +60úC, -4úF ~ +140úF)

Operating Temperature

: -30úC~+60úC (-4úF ~ +140úF)

Operating Voltage

HHP : 3.6V DC (°10%)

Hands-free : 13.7V DC (°10%)

Size and Weight : 88.0 x 56.5 x 26.7/27.6/31.3 mm

including slim battery : 117.3 g

including standard battery : 145.2 g

including extended battery : 160.5 g

Operating Time

Digital Mode Standby Time

: up to 36 hours (with slim battery)

: up to 65 hours (with standard battery)

: up to 100 hours (with extended battery)

Talk Time

: up to 75 min (with slim battery)

: up to 150min (with standard battery)

: up to 240min (with extended battery)

2-1

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2-2 Digital Mode

Waveform Quality

0.944 or more

Time Reference

°1uS or less

Rx Sensitivity and Dynamic Range

-104dBm, FER=0.5% or less

-25dBm, FER=0.5% or less

Tx Output Power

320mW (25dBm)

Tx Frequency Deviation

°300Hz or less

Occupied Band Width

1.32MHz

Tx Conducted Spurious Emission

900KHz : -42dBc / 30KHz below

1.98MHz: -54dBc / 30KHz below

Minimum Tx Power Control

below -50dBm

-25dBm: -57.0dBm ~ -38.5dBm

Open Loop Power Control

-65dBm: -17.5dBm ~ + 1.5dBm

-104dBm: +18.0dBm ~ +30.0dBm

Standby Output Power

below -61dBm

Test1: °24dB or less

Test2: 0mS ~ 2.5mS

Colsed Loop Tx Power Control Range

Test3: °24dB or more

Test4: °24dB or more

Test5: °24dB or more

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2-2

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