Samsung SCH-N500 User manual

CDMA TELEPHONE
CDMA TELEPHONE CONTENTS
SCH-N500
1. General Introduction
2. Specification
3. Installation
4. Product Support Tools
5. Circuit Description
6. Test Procedure
7. Flow Chart of Troubleshooting
8. Electrical Parts List
9. Exploded Views and Parts List
10. Block Diagram
11. PCB Diagrams

Samsung Electronics Co.,Ltd. Setember. 2005
Printed in Korea.
Code No.: GH68-08423A
BASIC.
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.
ⓒ

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1. General Introduction
1-1
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The SCH-N500 (Single Mode) phone functions as digital phone working in CDMA(Code Division Multiple
Access) mode.
The following standards and minimum performance standards shall be met or exceeded by each
subscriber unit.
Air Interface
The Subscriber Unit shall be Single band in compliance with TSB-74.
TIA/EIA IS-125 : Recommended Minimum Performance standards for Digital Cellular Wideband Spread
Spectrum Speech Service Option1.
TIA/EIA IS-126-A : Mobile Station Loop back Service Option standard.
TIA/EIA IS-95B : Mobile Station-Base Station Compatibility Standard for Dual-Mode Wideband Spread
Spectrum Cellular Systems;for the analog air interface.
CDMA Receiver/Transmitter Specifications and Requirements
The Subscriber Unit shall meet TIA/EIA IS-98C. The Subscriber Unit shall comply with Personal Station
Class III.

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General Introduction
1-2
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2. Specification
2-1
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2-1 General
ITEM CDMA
Tx Freq. range
Rx Freq. range
Channel Bandwidth
Channel Spacing
Number of Channel
Duplex Separation
Type of Emission
In/Output Impedance
Tx Local Freq.
Rx Local Freq
TCXO freq.
Freq. Stability
Operating Temperature
824.64 ~ 848.87MHz
869.64 ~ 893.37MHz
1.23MHz
30KHz
20FA
45MHz
1M25F9W
50 Ohm
1649.28~1696.74MHz
1739.28~1786.74MHz
19.2MHz
(FRX-45MHz)+/-300Hz
-30deg ~ +60deg
Supply Voltage
Size and Weight
3.6V
STD : 57.0 X 37.0 X 5.1mm
20g 800 mAh

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Specification
2-2
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2-2 800MHz CDMA
GENERAL
Frequency Range
. Transmitter : 824.64 ~ 848.87MHz
. Receiver : 869.64 ~ 893.37MHz
Channel Bandwidth : 1.23MHz
Channel Spacing : 30kHz
Number of Channels : 20FA
Duplex Separation : 45 MHz
Type of Emission : 1M25F9W
Input/Output Impedance : 50 ohms
Local Frequency
. Transmitter : 1649.28~1696.74MHz
. Receiver : 1739.28~1786.7MHz
TCXO Frequency : 19.2MHz
Frequency Stability : (FRX-45MHz) ±300Hz
Operation Temperature : -30°C ~ +60°C
Supply Voltage : +3.6V
TRANSMITTER
Waveform Quality : 0.944 or more
Open Loop Power Control Range
. -25dBm : -57.5dBm ~ -38.5dBm
. -65dBm : -17.5dBm ~ +1.5dBm
. -93.5dBm : +10.5dBm ~ +29.5dBm

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Specification
2-3
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Minimum Tx Power Control : below -50dBm
Closed Loop Power Control Range : ±24dB
Maximum RF Output Power : 398mW(+24.5dBm)
Occupied Bandwidth : 1.23MHz
Conducted Spurious Emission @885 KHz : -42dBc/30kHz
@1.98 MHz : -54dBc/30kHz
RECEIVER
Rx Sensitivity and Dynamic Range : -104dBm, FER=0.5% or less
: -25dBm, FER=0.5% or less
Conducted Spurious Emission
. 869~894 MHz : <-81dBm
. 824~849 MHz : <-61dBm
All Other Frequencies : <-47dBm
Single Tone Desensitization : lower than 1 %
. Rx power level = -101dBm
. Tone power level = -30dBm
. Tone offset from carrier = ±900KHz
Intermodulation Spurious Response Attenuation : lower than 1 %
. Tone 1 offset from carrier = ±900KHz
. Tone 2 offset from carrier = ±1.700MHz
-Test1,2
Rx power = -101dBm
Tone 1 power = -43dBm
Tone 2 power = -43dBm
-Test3,4
Rx power = -90dBm
Tone 1 power = -32dBm
Tone 2 power = -32dBm
-Test5,6
Rx power = -79dBm
Tone 1 power = -21dBm
Tone 2 power = -21dBm

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Specification
2-4
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2-3 CDMA Debug Display Information
Toselectdebugdisplaymode:Select[Menu]+Press[5]+[*]+press[2]+[1]+[2]+[3]+[5]+[8]+
[0] + select [Debug Screen].
CDMA Monitor
Sxxxxx Nxxxxx SX
Pxxx RSSI-ECIO Wxx
CxxxxR-xx SI0 T-xx
②
⑤
⑧
①⑥ ③
④
⑦
⑩
⑨
①SID : SXXXX
②NID : NXXXX
③Call Processing State : SX
1) S1 : Init State
2) S2 : Idle State
3) S3 : VC Init State
4) S4 : WFO State
5) S5 : WFA State
6) S6 : Call State
7) S7 : Release State
8) S8 : OVHD State
9) S9 : Originate State
10) SA : Page Res State
11) SB : ORD Res State
12) SC : Reg State
13) SD : MSG State
⑪
④Pilot PN Code
⑤RSSI-ECIO
⑥-ECIO
⑦Walsh Code
⑧Channel Number
⑨Protocol Revision
⑩Slot Cycle Index
⑪ Call state : TX PDM Value
Idle, Sleep state :
Tx_Gain_ADJ Accumulator Value

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3. Installation
3-1
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Installing and Removing the Battery
To install, insert the battery into the opening on
the back of the phone making sure the plastic tabs
on the back are inserted into the matching slots in
the phone. Press down until the latchsnaps into
place.
To remove, make sure the power is off. Push the
battery release latch up completely. Pull and lift the
battery away from the phone.

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Installation
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3-2