Samsung SCH-1900 User manual

CDMA PORTABLE

PCS TELEPHONE

SCH-1900

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

CDMA PORTABLE PCS TELEPHONE

SERVICE

Manual

Samsung Electronics Co.,Ltd.

GH68-60620A

Printed in Korea.

Samsung Electronics 1-1

1. Specification

1-1 General

Frequency Range

Transmitter : 1850 °≠1910 MHz

Receiver : 1930 °≠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 (FTX-130.38), 2nd (260.76 MHz)

Receiver : 1st (FRX-210.38), 2nd (420.76 MHz)

TCXO Frequency : 19.68 MHz

Frequency Stability : (FRX - 80 MHz) °æ 150 Hz

Operating Temperature : -30 °… ° ≠+60 °…

Supply Voltage : +4.8 V

Current Consumption (Average)

Standby : 150 mA (Non-slot mode)

Talk : 400 mA (at +10 dBm)

Size and Weight

Including Standard Battery : 114(H)°ø49.8(W)°ø10.5(D), 118.67 g

Including Extended Battery : 114(H)°ø49.8(W)°ø20.5(D), 161.86 g

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 °≠1990 MHz : <-81 dBm

1850 °≠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

Specification

1-2 Samsung Electronics

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 °≠+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

Samsung Electronics 2-1

2. Installation

2-1 Installing a Battery Pack

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.

2-2 For Desk Top Use

1. Choose a proper location to install the charger

for desk top use.

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.

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.

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.

Press this button to release

the battery pack

Figure 2-1 Charging The Phone and Battery

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.

2. Slide the battery pack upwards until it clicks

firmly into position. The phone is now ready

to be turned on.

Installation

2-2 Samsung Electronics

2-3 For Mobile Mount

2-3-1 Antenna

1. Choose a proper location to install the

antenna.

¶UThe center of the roof top provides the best

performance.

¶UThe edge of the rear trunk also provides a

good performance. However, the antenna

should be higher than the roof of the car.

¶UIn case of on-glass antenna, you should

align the antenna base with the round plate

to connect the cables correctly.

2. Mount the antenna vertically, connect the

antenna cable.

3. Tighten the antenna nut fully.

2-3-2 Cradle

1. Choose a location where it is easy to reach and

does not interfere with the driver's safe

operation of the car.

2. Separate the two halves of the clamshell by

removing the two large slotted screws. See the

figure 2-2.

3. Drill holes and mount the lower half of the

clamshell by using the screws.

4. Place the cradle onto the remaining half of the

clamshell and assemble them by using the

screws.

5. Reassemble the two halves of the clamshell

together. Adjust the mounting angle and

tighten the two slotted screws.

Figure 2-2 Cradle Installation

Samsung Electronics 2-3

Installation

2-3-3 Hands-Free Box

1. Drill holes in a proper location for the hands-

free box, attach the mounting bracket by using

the screws. See the figure 2-3.

2. Install the hands-free box into the bracket.

2-3-4 Hands-Free Microphone

1. It is recommended to install the microphone

where it is 30-45 cm (12-18") away from the

driver. Choose the location where is least

susceptible to interference caused by external

noise sources, ie, adjacent windows, radio

speakers, etc. Normal place is the sun visor.

2. Once the microphone has been correctly

positioned, connect the microphone wire to

the MIC jack on the hands-free box.

Figure 2-3 Hands-Free Box Installation

Installation

2-4 Samsung Electronics

Figure 2-4 Cable Connections

2-3-5 Cables

1. Connect the cradle and the hands-free box

with the data cable. See the figure 2-4.

2. Connect the antenna cable to the RF jack of the

cradle.

3. Connect one end of the power cable to the

battery or ignition terminal. Connect the red

wire to the battery (+) terminal, black wire to

the vehicle chassis. Then connect the battery (-)

terminal to the vehicle chassis.

4. Connect the other end of the power cable to

the PWR jack of the hands-free box.

Notes:

¶UIt is recommended to connect the power cable

directly to the battery to avoid power noise.

¶UMake sure the connection between the battery -

terminal and the vehicle chassis is made

correctly.

¶UMake sure the fuse having a proper capacity is

used on the power cable.

¶UMake sure the cables do not pass over any sharp

metal edge that may damage it.

Enter Lock

??????

SVC Menu°Ë°È

1:PCS Phone#

2:General

ESN B0000000

CAI version1

VOC13K/8K

SO_VOICE_13K

SCM 00001010

Lock Code

0000

Slot ModeNo

Slot Index 2

MENU, 5, 0 -selects NAM programming

6-digit code -Enter random 6-digit code (MSL)

2-choose 'GENERAL.'

Volume °„ -Electronic Serial Number of the phone is displayed

Volume °„ -Common Air Interface version is displayed

°Ëor°È -Select vocoder service option

OK -stores it

Volume °„ -Station Class Mark displays the power class,

transmission, slotted class, dual mode.

Lock code, current status is displayed

4-digit code -to change, enter new code.

OK -stores it.

Slot mode. 'Yes' indicates the slot mode.

°Ëor°È -changes the status.

OK -stores it.

Slot mode index. The higher, the longer sleeping time.

0 - 7 -to change, enter new one.

OK -stores it.

Samsung Electronics 3-1

LCD Display Key in Function

3. NAM Programming

NAM features can be programmed as follows:

Notes:

-If you enter the NAM program mode, each item shows the currently stored data. Go to the next item by

pressing OK.

-You can modify the data by entering a new data.

-If you enter a wrong digit, press CLR to delete the last digit. Press and hold CLR to delete all digits.

-To scroll items backwards or forwards, press the VOLUME button on the left side of the phone.

3-1 General Setup

NAM Programming

3-2 Samsung Electronics

3-2 Setting Up NAM

LCD Display Key in Function

Volume °„ -NAM Programming Menu is displayed

3-choose 'Setup NAM'

number IMSI Mobile Country Code, current code is displayed.

OK -to change, enter new one.

-stores it.

number IMSI Mobile Network Code, current code is displayed.

OK -to change, enter new one.

-stores it.

CDMA Access Over load Class, current status is displayed.

class number -to change, enter new one.

OK -stores it.

CDMA Home system ID, current status is displayed.

°Ëor°È -changes the status.

OK -stores it.

CDMA foreign SID, current status is displayed.

°Ëor°È -changes the status.

OK -stores it.

CDMA foreign NID, current status is displayed.

°Ëor°È -changes the system.

OK -stores it.

first SID written in the list, current status is displayed.

number -to change, enter new one.

OK -stores it.

first NID written in the list, current status is displayed.

number -to change, enter new one.

OK -stores it.

SVC Menu°Ë°È

1:PCS Phone #

2:General

SVC Menu°Ë°È

3:NAM

IMSI_MCC 310

IMSI_MNC 00

CDMA ACCOLC0

CDMA HomeSID

Yes

CDMA fSID

Yes

CDMA fNID

Yes

SID 4120

NID 65535

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