Samsung SCH-A101 Service Manual

SERVICE

CDMA Cellular Phone

SCH-A101

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

M

E

N

U

O

K

/

1

. ´

2

4

7

3

5

6

8

9

0

©Samsung Electronics Co.,Ltd. March. 2000

Printed in Korea.
Code No.: GH68-01017A
BASIC.

ELECTRONICS

1. General Description

The SCH-A101 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

SAMSUNG Proprietary-Contents may change without notice

1-1

SAMSUNG Proprietary-Contents may change without notice

2-1

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 EA
Duplex Spacing : 45 MHz
Frequency Stability : ±2.5 ppm (-30˚C ~ +60˚C, -4˚F ~ +140˚F)
Operating Temperature : -20˚C~+60˚C (-4˚F ~ +140˚F)
Operating Voltage

HHP : 3.6V DC (±10%)
Hands-free : 13.7V DC (±10%)

Operating Time

(Digital Mode)

Item Size (mm) Weight (g)
Including slim battery 80 x 42 x 23 87
Including standard battery 80 x 42 x 25 114

Item Standby Time Talk Time
Slim battery up to 90 hours up to 150 min
Standard battery up to 180 hours up to 250 min

SAMSUNG Proprietary-Contents may change without notice

2-2

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

Closed Loop Tx Power Control Range Test3: ±24 dB or more

Test4: ±24 dB or more
Test5: ±24 dB or more

SAMSUNG Proprietary-Contents may change without notice

2-3

Specification

2-3 CDMA Debug Display Information (menu 8)

IN IDLE MODE

IN CONVERSATION MODE

1 : Sxxxxx : SID (System ldentification) toggle

Nxxxxx : NID (Network Identification) toggle
2 : SIx : Slot cycle index (lowest between the system and the phone will be used)
3 : Handset Status : 0 - Acquisition

1 - Synchronization
2 - Paging (Idle)
3 - Traffic Initialization
4 - Traffic Mode

5 - Exit
4 : T-xx : Tx adjust, Value ranges from +63 ~ -63dB
5 : Dxxx : sector power in dBm
6 : -xx : Ec/Io
7 : Pxxx : PN offset
8 : CHxxxx : channel number
9 : TEx : Tx vocoder rate (8 is full rate, 1 is 1/8th rate)

E : EVRC

V : 13k or 8k
10 : REx : Rx vocoder rate (8 is full rate, 1 is 1/8th rate)
11 : xx : Walsh code used in traffic channel

1253

64

Sxxxx

TEx
T-xx Dxxx -xx

CHxxxxPxxx

REx xx x

T-xx Dxxx -xx

CHxxx

Pxxx

SIx x

7

8

91011

3

SAMSUNG Proprietary-Contents may change without notice

3-1

3. Installation

3-1 Installing a Battery Pack

Push up and hold the catch above the battery on the back of
the phone (

➀) and lift the battery away. (➁ ~ ➂)

Insert the saw-toothed end on the bottom of the battery into the slots
on the bottom of the phone (➀), then slide the battery down (➁).

➀

➁

➂

➁

➀

SAMSUNG Proprietary-Contents may change without notice

3-2

Installation

3-2 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 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.

Figure 3-1 Charging the Phone and Battery

SPECIFICATIONS USING “DTCA10”

Battery Type Slim Battery Standard Battery

(Li-ion, 500 mAh) (Li-ion, 1000 mAh)

Model Name BTIA10AD BTSA10AD
SEC Code GH43-00179A GH43-00180A
Charging Time 4 hours 4 hours

SLIM
BATTERY

STANDARD
BATTERY

SAMSUNG Proprietary-Contents may change without notice

3-3

Installation

3-3 For Mobile Mount

3-3-1 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 3-2.

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 3-2 Cradle Installation

3-3-2 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 3-3.

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

SAMSUNG Proprietary-Contents may change without notice

3-4

Installation

3-3-3 Hands-Free Microphone

1. It is recommended to install the microphone where it is 30-45 cm (12-18inch 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 3-3 Hands-Free Box 1 Installation

Yellow(Ignition)

White(Stereo Mute)

Red(Vehicle Battery)

Black(GND)

SAMSUNG Proprietary-Contents may change without notice

3-5

Installation

3-3-4 Cables

1. Connect the cradle and the hands-free box with the data cable. See the figure 3-4.

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

3. Connect the power cable as follows:

Connect the red wire to the battery (+) terminal, black wire to the vehicle chassis. Then connect the battery (-)
terminal to the vehicle chassis. Connect the yellow wire to the switched side of the ignition switch, and then
connect the white to the stereo mute wire from your vehicle stereo.

4. Connect the other end of the power cable to the PWR jack of the hands-free box.

Notes:

It is recommended to connect the power cable directly to the battery to avoid power noise.
Make sure the connection, in the vehicle, between the battery (-) terminal and vehicle chassis is made correctly.
Make sure the fuse having a proper capacity is used on the power cable.
Make sure the cables do not pass over any sharp metal edge that may damage it.

4. NAM Programming

NAM features can be programmed as follows:

Notes:

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

- 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.

4-1 General Setup

LCD Display Key in Function

47 869#08#9 47 869#08#9 -selects NAM programming
NAM program 1 -choose ‘GENERAL’
1:General
2:Setup NAM1

ESN Volume ▼ -Electronic Serial Number of the phone

B0000000

CAI version Volume ▼ -The version of Common Air Interface supported by

3 the mobile

VOC8/13/EVRC

SO_VOIC_EVRC Volume ▼ -evrc, voice08k, voice13k

SCM Volume ▼ -Station Class Mark displays the power class(bit0~1),

00101010 transmission(bit2), slotted class(bit5), dual mode(bit6).

Lock Code (0000) -Lock code, current ststus is displayed

0000 4-digit code to change, enter new code.

-store it

Slot Mode -Slot mode. ‘Yes’ indicates the slot mode.

Yes <or> changes the status.

-store it.

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

2 0-7 to change, enter new one.

-store it.

Pref NAM1... -Preferred system selection for NAM1
Digital only changes the system.

-store it.

Pref NAM2... -Preferred system selection for NAM3
Digital only changes the system.

-store it.

Pref NAM4... -Preferred system selection for NAM4
Digital only changes the system.

-store it.

OK/

OK/

OK/

OK/

OK/

OK/

SAMSUNG Proprietary-Contents may change without notice

4-1

OK/

SAMSUNG Proprietary-Contents may change without notice

4-2

NAM Programming

4-2 Setting Up NAM1

LCD Display Key in Function

NAM Program 2 -Choose ‘Setup NAM1.’
1:General
2:Setup NAM1

Setup NAM1 1 -Choose ‘Phone #’
1:Phone #
2:CDMA

Phone # -CDMA current number is displayed.

85200000000 Phone number to change, enter new one.

-store it.

Mobile ID # -CDMA current number is displayed.

85200000000 Phone number to change, enter new one

-store it.

Setup NAM1 2 -choose ‘CDMA’
1:Phone #
2:CDMA

IMSI_MCC -IMSI Moble Country Code, current code is displayed.

454 number to change, enter new one.

-store it.

IMSI_MNC -IMSI Mobile Network Code, current code is displayed.

05 number to change, enter new one.

-store it.

CDMA pref.. -Preferred system selection, current system is displayed.

A pref <or> to changes the system.

-store it.

CDMA ACCOLC CDMA Access Overload Class, current status is displayed.

0 class number -to change, enter new one.

-store it.

Pchn Sys A -Preferred channel currently used under system A

283 channel number to change, enter new one.

-store it.

Pchn Sys B -Preferred channel currently used under system B

384 channel number to change, enter new one.

-store it.

OK/

OK/

OK/

OK/

OK/

OK/

OK/

OK/

SAMSUNG Proprietary-Contents may change without notice

4-3

NAM Programming

LCD Display Key in Function

Schn Sys A -Second channel currently used under system A

691 channel number to change, enter new one.

-store it.

Schn Sys B -Second channel currently used under system B

777 channel number to change, enter new one.

-store it.

CD Acq SID 1 -1st Acquisition system ID, current status is displayed.

0 ID number to change, enter new one.

-store it.

CD lockSID 1 -1st lock system ID,current status is displayed.

10640 ID number to change, enter new one.

-store it.

CDMA Home SID -CDMA Home system ID, current status is displayed

Yes <or> changes the status.

-store it.

CDMA fSID -CDMA foreign SID, current status is displayed.

Yes <or> changes the system.

-store it.

CDMA fNID -CDMA foreign NID, current status is displayed.

Yes <or> changes the system.

-store it.

SID #1 -first SID written in the list, current status is displayed.

10641 number to change, enter new one.

-store it.

NID #1 -first NID written in the list, current status is displayed.

65835 number to change, enter new one.

-store it.

SID #2 -2nd SID written in the list, current status is displayed.

13 number to change, enter new one.

-store it.

NID #2 -2nd NID written in the list, current status is displayed.

0 number to change, enter new one.

-store it.

SID #3 -3rd SID written in the list, current status is displayed.

0 number to change, enter new one.

-store it.

OK/

OK/

OK/

OK/

OK/

OK/

OK/

OK/

OK/

OK/

OK/

OK/

SAMSUNG Proprietary-Contents may change without notice

4-4

NAM Programming

4-3 Setting Up NAM 2

LCD Display Key in Function

SNID #3 -3rd SID written in the list, current status is displayed.

0 number to change, enter new one.

-store it.

SID #4 -4th SID written in the list, current status is displayed.

0 number to change, enter new one.

-store it.

NID #4 -4th NID written in the list, current status is displayed.

0 number to change, enter new one.

-store it.

OK/

OK/

OK/

LCD Display Key in Function

NAM Program 3 -Choose ‘Setup NAM2’
1:General
2:Setup NAM1
3:Setup NAM2

The NAM2 setup program is the same as ‘NAM1’

4-4 Setting Up NAM 3

LCD Display Key in Function

NAM Program 4 -Choose ‘Setup NAM3’
3:Setup NAM2
3:Setup NAM3

The NAM3 setup program is the same as ‘NAM1’

4-5 Setting Up NAM 4

LCD Display Key in Function

NAM Program 5 -Choose ‘Setup NAM4’
5:Setup NAM4

The NAM4 setup program is the same as ‘NAM1’

SAMSUNG Proprietary-Contents may change without notice

5-1

5. Product Support Tools

5-1 General

IMPORTANT INFORMATION
Purpose

The Product Support Tool (PST) offers you the ability to interface with the SAMSUNG CDMA telephone using
a PC. With this tool you can program the phones network system requirements and functionality, swap phone
data, and download software upgrades. This document supports UniPST version 1.xx.

NOTE: This software must be executed in the Windows95/98 mode.

EQUIPMENT REQUIRED

Make sure you have the following equipment setup:

1. Minimum PC configuration: 586 CPU, 16MB RAM, Windows95/98, 5MB of disk space free for software

upgrade.

2. PST Software with appropriate cable (DM Cable for SAMSUNG CDMA phone).

3. Serial Port (16550 Serial Interface Card).

4. Power Supply (3.8 V) or Battery

INST

ALLATION

Software

1.Insert the PST floppy disk into drive (A:\).

2.Create an appropriate directory on the C:\ drive for PST software, Execute Setup.exe file,

The installation program creates folder and task bar on the windows95/98 start bar.

SAMSUNG CDMA Phone

The serial port should be configured to COM1 or COM2.
Use the following procedure to connect the phone, cable, and PC .
Plug the female end of the DM Cable into the 16550 card.
Pull the black rubber connector away from the socket at the base of the phone.
Plug the special connector on the cable into the socket at the base of the phone.

SAMSUNG Proprietary-Contents may change without notice

5-2

Product Support Tools

5-2. PST (Product Support Tool)

5-2-1 Getting Started

MAIN MENU SCREEN

1. At the Windows95/98, Double Click “UniPst.exe”.

2. The Main Menu Screen will be displayed.

The Main Menu Screen shows the basic tasks that are available.

CAUTION: DO NOT attempt to program phone with a low battery.

PST SETUP

UniPst supports SAMSUNG CDMA portable telephone. You can select serial port COM1 or COM2.

5-2-2 Operation Procedure

Service Programming
The Service Programming screens enable you to set and change the service activation parameters of the
phones. These items can be changed individually or as a group via the “Edit Items” Property Sheet of the PST.
There are several pages on the Service Programming Property Sheet (See below Figure).

Read Data from File

Click “open” icon to select the name of a file whose extension is “mmc”. The values will be read from the
named file, and will initialize the parameter values seen on the Service programming screen

Read Data from Phone

Click Read from the Phone icon to upload the current programmable parameters of the phone. The values are
read from the phone, so the phone must have the power ON and be properly connected to the PST.

NOTE: To actually view the data you need to go to the Edit Items screens.

Edit Items

Click this icon to edit Number Assignment Module (NAM) items or UI items.

There are two types of screens:

1. Parameters associated with a particular Number Assignment Module (NAM)

2. UI items settings

Phone Book

Click this icon to edit Phone Book.
While you edit cell, you can use <Enter> and < UP , DOWN,LEFT,LIGHT Arrow> and <SPACE> key. If you
want to edit phone number or name , you must move rectangle box to cell where you want to edit , Write it
down . if <UP and DOWN Arrow> key is pressed, the cursor moves to next cell or previous cell.

SAMSUNG Proprietary-Contents may change without notice

5-3

Product Support Tools

Save Data to File

Click this icon to save the current parameters to a file. Once you enter a filename, Click <OK> button to write
all current parameters to that file. This way the same information can be downloaded into multiple phones.

Write to Phone

Click this icon to write the selected parameter values to the phone. Writing the selected values to the phone
may take up to a minute.
If there are dependencies in a field you can make all the changes in the proper fields and download the
information all together.
If you intend to use this “Write to Phone” feature, it is recommended that you do a “Read Data from Phone”
first, and then make the changes, so that nothing gets inadvertently overwritten.

NOTE: DO NOT TOUCH THE PHONE WHILE WRITING IS IN PROGRESS.

Software Download and Upgrade Screen

To begin a software upgrade or download, perform the following steps:

1. From the main menu screen choose DOWNLOAD MODE?
Click open icon to choose a BIN file of the new software to be loaded. Choose the appropriate BIN file, then
Click <Open> (see below figure).

2. Click Download? to begin downloading the file. You will notice various messages and a progress bar that
informs the user what percentage of the downloading has already occurred.

3.Click Mode Select box, then Select SERVICE MODE?to return to the Service Mode Screen.

NOTE: DO NOT POWER OFF WHILE THE PHONE IS BEING DOWNLOADED!