Samsung SCH-2000 service manual.pdf

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Samsung SCH-2000 service manual
C D M A P O R TA B L E
PCS T E L E P H O N E
SCH-2000
S E RVICE Manual
CDMA PORTABLE PCS TELEPHONE
CONTENTS
1. Specification
2. Installation
3. NAM Programming
4. Circuit Description
5. Test Procedure
6. Troubleshooting
7. Exploded Views and Parts List
8. PCB Diagrams
9. Electrical Parts List
10. Block & Circuit Diagrams
141228815.007.png 141228815.008.png 141228815.009.png
Samsung Electronics Co.,Ltd.
GH68-60692A
Printed in Korea.
141228815.010.png
1. Specification
1-1 General
Frequency Range
Transmitter
: 1850 °
¹
1910 MHz
Receiver
: 1930 °
¹
1990 MHz
Channel Bandwidth
: 1.23 MHz
Channel Spacing
: 50 KHz
Number of Channels
: 1200
Duplex Separation
: 80 MHz
Type of Emission
: G7 W
Input/Output Impedance
: 50 ohms
Intermediate Frequency
Transmitter
: 130.38 MHz
Receiver
: 210.38 MHz
Local Frequency
Transmitter
: 1st (F TX -130.38), 2nd (260.76 MHz)
Receiver
: 1st (F RX -210.38), 2nd (420.76 MHz)
TCXO Frequency
: 19.68 MHz
Frequency Stability
: (F RX - 80 MHz) °æ 150 Hz
Operating Temperature
: -30 °… °
¹
+60 °…
Supply Voltage
: +3.6 V
Current Consumption (Average)
Standby
: 180 mA (Non-slot mode)
Talk
: 480 mA (at +10 dBm)
Size and Weight
Including Standard Battery
: 121.9(H)°ø50.8(W)°ø20.3(D), 138.9 g
Including Extended Battery
: 121.9(H)°ø50.8(W)°ø25.4(D), 158.7 g
Samsung Electronics
1-1
141228815.001.png
Specification
1-2 Transmitter
Waveform Quality
: 0.944 or more
Open Loop Power Control Range
-25 dBm
: -60.5 dBm °
-41.5 dBm
-65 dBm
: -20.5 dBm °
-1.5 dBm
-104dBm
: +15.0 dBm °
¹
+30.0 dBm
Minimum Tx Power Control
: -50 dBm below
Closed Loop Power Control Range
: °æ24 dB
Maximum RF Output Power
: 200 mW (+23 dBm)
Occupied Bandwidth
: 1.23 MHz
Conducted Spurious Emissions @1.25MHz
: -42 dBc/30KHz
1-3 Receiver
Rx Sensitivity and Dynamic Range
: -104 dBm, FER=0.5% or less
(Rate Set 1)
: -25 dBm, FER=0.5% or less
Conducted Spurious Emission
1930 °
¹
1990 MHz
: <-81 dBm
1850 °
¹
1910 MHz
: <-61 dBm
All Other Frequencies
: <-47 dBm
Single Tone Desensitization
: lower than 1%
Rx power=-101 dBm
Tone power=-30 dBm
Tone offset from carrier=°æ1.25 MHz
Intermodulation Spurious Response Attenuation : lower than 1%
Rx power=-101 dBm
Tone power 1=-43 dBm
Tone power 2=-43 dBm
Tone 1 offset from carrier=°æ1.25 MHz
Tone 2 offset from carrier=°æ2.05 MHz
1-2
Samsung Electronics
¹
¹
141228815.002.png
2. Installation
2-1 Installing a Battery Pack
1. To attach the battery pack after charging, align
it with the phone about 1cm (1/2") away from
its place so that the two arrows on the phone
are seen, the battery charge contacts pointing
downwards.
3. To remove the battery pack, release it by
pressing the button on the rear of the phone.
4. Slide the battery pack downwards about 1cm
(1/2") and lift it away from the phone.
2. Slide the battery pack upwards until it clicks
firmly into position. The phone is now ready
to be turned on.
Press this button to release
the battery pack
2-2 For Desk Top Use
1. Choose a proper location to install the charger
for desk top use.
3. To charge the battery pack, insert the battery
pack into the rear slot of the charger. The lamp
marked BAT on the front panel of the charger
lights up red.
2. Plug the power cord of the charger into an
appropriate wall socket. When the power cord
is connected correctly, the lamps turn on
briefly.
4. If you do not wish to use the phone while
charging the battery, insert the phone with the
battery pack attached into the front slot of the
charger. The lamp marked PHONE on the
front panel of the charger lights up red.
Figure 2-1 Charging The Phone and Battery
Samsung Electronics
2-1
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