Samsung SCH-611 service manual.pdf

CDMA Cellular Phone

SCH-611

SERVICE

Manual

CDMA Cellular Phone

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. Block diagram

10. PCB diagrams

11. Circuit diagrams

ELECTRONICS

©Samsung Electronics Co.,Ltd. Oct. 99

Printed in Korea.

Code No.: GH68-00668A

BASIC.

1. General Description

The SCH-611 cellular phone functions as 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

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1-1

2. Specification

2-1 General

Frequency Range

Digital Mode

Transmitter

: 824 ~ 849 MHz

Receiver

: 869 ~ 894 MHz

Channel Spacing

: 1.23 MHz

Number of Channels

: 20 FA

Duplex Spacing

: 45 MHz

Frequency Stability

: ±2.5 ppm (-30˚C ~ +60˚C, -4˚F ~ +140˚F)

Operating Temperature

: -30˚C~+60˚C (-4˚F ~ +140˚F)

Operating Voltage

HHP : 3.6V DC (±10%)

Hands-free : 13.7V DC (±10%)

Item

Size

Weight (g)

including slim battery

105 x 45 x 18

including standard battery

105 x 45 x 21

120

including extended battery

105 x 45 x 24

138

Operating Time

Digital Mode

Item

Standby Time

Talk Time

slim battery

up to 40 hours

up to 80 hours

standard battery

up to 75 hours

up to 150 hours

extended battery

up to 120 hours

up to 240 hours

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2-1

Specification

2-2 Digital Mode

Waveform Quality

0.944 or more

Time Reference

±1uS or less

Rx Sensitivity and Dynamic Range

-104 dBm, FER=0.5 % or less

-25 dBm, FER=0.5 % or less

Tx Output Power

280 mW (24.5 dBm)

Tx Frequency Deviation

±300 Hz or less

Occupied Band Width

1.32 MHz

Tx Conducted Spurious Emission

900 kHz : -42 dBc / 30 kHz below

1.98 MHz: -54 dBc / 30 kHz below

Minimum Tx Power Control

below -50 dBm

-25 dBm: -57.0 dBm ~ -38.5 dBm

Open Loop Power Control

-65 dBm: -17.5 dBm ~ + 1.5 dBm

-104 dBm: +18.0 dBm ~ +30.0 dBm

Standby Output Power

below -61 dBm

Test1: ±24 dB or less

Test2: 0 mS ~ 2.5 mS

Colsed Loop Tx Power Control Range

Test3: ±24 dB or more

Test4: ±24 dB or more

Test5: ±24 dB or more

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2-2

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