Samsung SCH-A105 Service Manual

SERVICE

CDMA Cellular Phone

SCH-A105

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

. ‘

©Samsung Electronics Co.,Ltd. July. 2000

Printed in Korea. Code No.: GH68-01246A BASIC.

ELECTRONICS

1. General Description

The SCH-A105 cellular phone functions as both analog cellular phone working in AMPS (Advanced Mobile Phone Service) mode and 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 System

• 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 Analog Mode Transmitter : 824.64 ~ 848.37 MHz 824 ~ 849 MHz Receiver : 869.64 ~ 894.37 MHz 869 ~ 894 MHz

Channel Spacing : 1.23 MHz 30 kHz Number of Channels : 20 EA 832 CHs Duplex Spacing : 45 MHz 45 MHz Frequency Stability : ±2.5 ppm (-20˚C ~ +50˚C, -4˚F ~ +122˚F) Operating Temperature : -20˚C~+50˚C (-4˚F ~ +122˚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 22 93 Including standard battery 80 x 42 x 24 116

Item Standby Time Talk Time Slim battery up to 100 hours up to 150 min Standard battery up to 170 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 ANALOG MODE

TRANSMITTER

RF output power Carrier ON/OFF conditions

“ON” Condition “OFF” Condition

Compressor

Compression Rate Attack Time Recovery Time Reference Input

Preamphasis Maximum Freqency Deviation

F3 of G3 Supervisory Audio Tone Signaling Tone Wideband Data

Post Deviation Limiter Filter

3.0 ~ 5.9KHz

5.9 ~ 6.1KHz

6.1 ~ 15KHz Over 15KHz

Spectrum Noise Suppression

For all modulation f0+20KHz ~ f0+45KHz

For modulation by voice and SAT f0 +45KHz

For modulation by WBD(without SAT) and ST (with SAT) f0+45KHz ~ f0+60KHz f0+60KHz ~ f0+90KHz f0+90KHz ~ 2f0

Harmonic and conducted Spurious Emissions

0.6W (+2/-4dB)

within ±3dB of specification output (in 2mS)

below-60dBm (in 2mS)

2:1

3mS

13.5mS

Input level for producing a nominal ±2.9KHz

peak freqency deviation of transmitted carrier

6dB/OCT within 0.3 ~ 3KHz

±12KHz ±2KHz (±10%) ±8KHz (±10%) ±8KHz (±10%)

above 40 LOG (F/3000) dB

above 35 dB

above 40 LOG (F/3000) dB

above 28 dB

above 26 dB

above 63 +10 LOG (PY) dB

above 45 dB above 65 dB

above 63 +10 LOG (PY) dB

(where f0=carrier frequency

PY=mean output power in watts)

below 43 + 10 LOG (PY) dB

SAMSUNG Proprietary-Contents may change without notice

2-4

Specification

RECEIVER

De-Emphasis Expander

Expander Rate Attack Time Recovery Time Reference Input

Sensitivity Intermodulation Spurious Response Attenuation RSSI Range Protection Against Spurious Response

Interference In Band Conducted Spurious Emission

Transmit Band Receive Band Other Band

Radiated Spurious Emission Frequency Range

25 ~ 70 MHz 70 ~ 130MHz 130 ~ 174 MHz 174 ~ 260 MHz 260 ~ 470 MHz 470 ~ 1GHz

-6dB / OCT within 0.3 ~3KHz

1:2

within 3mS

within 13.5mS

output level to a 1000Hz tone from a carrier

within ±2.9KHz peak frequency deviation

12dB SINAD / -116dBm

avove 65dB above 60dB above 60dB

below -60dBm below -80dBm below -47dBm

Maximum Allowable EIRP

-45dBm

-41dBm

-41 ~ -32dBm

-32dBm

-32 ~ -26dBm

-21dBm

SAMSUNG Proprietary-Contents may change without notice

2-5

Specification

2-4 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

Sxxxx

TEx T-xx Dxxx -xx

CHxxxxPxxx

REx xx x

T-xx Dxxx -xx

CHxxx

Pxxx

SIx x

91011

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 BTIA10AA BTSA10AA

BTIA10AD BTSA10AD

SEC Code GH43-00173B GH43-00174B

GH43-00179B GH43-00180B

Charging Time 4 hours 4 hours

STANDARD BATTERY

SLIM 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

MOUNTING BRACKET

CAR

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 3:Setup NAM2

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 Volume ▼

SO_VOIC_13K -evrc, voice08k, voice13k

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

01101010 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.

-stores it

Slot Mode <or> -Slot mode. ‘Yes’ indicates the slot mode.

Yes changes the status.

-stores it.

Slot Index 0-7 -Slot mode index. The higher, the longer sleeping time

2 to change, enter new one.

-stores it.

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

-stores it.

Pref NAM2... -Preferred system selection for NAM2 Digital pref changes the system.

-stores it.

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 3:Setup NAM2

Setup NAM1 1 -Choose ‘Phone #’ 1:Phone # 2:FM 3:CDMA

Phone # Phone number -CDMAcurrent number is displayed.

3003003000 to change, enter new one

-stores it.

Mobile ID # Phone number -CDMA current number is displayed.

3003003000 to change, enter new one

-stores it.

Setup NAM1 2 -Choose ‘FM’ 1:Phone # 2:FM 3:CDMA

FM Home SID ID number System ID for home, current status is displayed.

20 - to change, enter new one.

- store it.

FM 1st Chn Channel number Current 1st paging channel.

334 - to change, enter new one.

- store it.

FM Acq SID1 ID number Acquisition system ID 1, Current status is displayed.

20 - to change, enter new one.

- store it.

FM Acq SID2 ID number Acquisition system ID 2, Current status is displayed.

0 - to change, enter new one.

- store it.

FM Acq SID3 ID number Acquisition system ID 3, Current status is displayed.

0 - to change, enter new one.

- store it.

OK/

SAMSUNG Proprietary-Contents may change without notice

4-3

NAM Programming

LCD Display Key in Function

FM Acq SID4 ID number Acquisition system ID 4, Current status is displayed.

0 - to change, enter new one.

- store it.

FM Acq SID5 ID number Acquisition system ID 5, Current status is displayed.

0 - to change, enter new one.

- store it.

FM Acq SID6 ID number Acquisition system ID 6, Current status is displayed.

0 - to change, enter new one.

- store it.

FM LockSID 1 ID number Lock system ID 1, current status is displayed.

0 - to change, enter new one.

- store it.

FM LockSID 2 ID number Lock system ID 2, current status is displayed.

0 - to change, enter new one.

- store it.

FM LockSID 3 ID number Lock system ID 3, current status is displayed.

0 - to change, enter new one.

- store it.

FM LockSID 4 ID number Lock system ID 4, current status is displayed.

0 - to change, enter new one.

- store it.

FM LockSID 5 ID number Lock system ID 5, current status is displayed.

0 - to change, enter new one.

- store it.

FM LockSID 6 ID number Lock system ID 6, current status is displayed.

0 - to change, enter new one.

- store it.

FM LockSID1 ID number Lock system ID 6, current status is displayed.

0 - to change, enter new one.

- store it.

Auto Reg * or # FM Registration, current status is displayed.

Yes - changes the status

‘YES’ to enable, ‘NO’ to disable

- store it.

OK/

SAMSUNG Proprietary-Contents may change without notice

4-4

NAM Programming

LCD Display Key in Function

FM pref. * o r # Preferred system selection, current status is displayed.

B pref - changes the status

‘YES’ to enable, ‘NO’ to disable

- store it.

FM ACCOLC * or # Current Access Overload Class.

0 - change the status.

- store it.

Setup NAM1 - Choose ‘CDMA’ 1:Phone #

2.FM 3 3:CDMA

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

000 to change, enter new one.

-stores it.

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

00 to change, enter new one.

-stores it.

CDMA pref.. <or> -Preferred system selection, current system is displayed.

B pref changes the system.

-stores it.

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

0 -to change, enter new one.

-stores it.

Pchn Sys A channel number -Preferred channel currently used under system A

283 to change, enter new one.

-stores it.

Pchn Sys B channel number -Preferred channel currently used under system B

384 to change, enter new one.

-stores it.

Schn Sys A channel number -Second channel currently used under system A

691 to change, enter new one.

-stores it.

Schn Sys B channel number -Second channel currently used under system B

777 to change, enter new one.

-stores it.

OK/

LCD Display Key in Function

CD Acq SID 1 ID number 1~ 6 -1st Acquisition system ID, current status is displayed.

20 to change, enter new one.

-stores it.

CD Acq SID 2 ID number 1~ 6 -2nd Acquisition system ID, current status is displayed.

0 to change, enter new one.

-stores it.

CD Acq SID 3 ID number 1~ 6 -3rd Acquisition system ID, current status is displayed.

0 to change, enter new one.

-stores it.

CD Acq SID 4 ID number 1~ 6 -4th Acquisition system ID, current status is displayed.

0 to change, enter new one.

-stores it.

CD Acq SID 5 ID number 1~ 6 -5th Acquisition system ID, current status is displayed.

0 to change, enter new one.

-stores it.

CD Acq SID 6 ID number 1~ 6 -6th Acquisition system ID, current status is displayed.

0 to change, enter new one.

-stores it.

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

0 to change, enter new one.

-stores it.

CD lockSID 2 ID number -2nd lock system ID,current status is displayed.

0 to change, enter new one.

-stores it.

CD lockSID 3 ID number -3rd lock system ID,current status is displayed.

0 to change, enter new one.

-stores it.

CD lockSID 4 ID number -4th lock system ID,current status is displayed.

0 to change, enter new one.

-stores it.

CD lockSID 5 ID number -5th lock system ID,current status is displayed.

0 to change, enter new one.

-stores it.

CD lockSID 6 ID number -6th lock system ID,current status is displayed.

0 to change, enter new one.

-stores it.

CDMA Home SID <or> -CDMA Home system ID, current status is displayed

Yes changes the status.

-stores it.

SAMSUNG Proprietary-Contents may change without notice

4-5

NAM Programming

OK/

SAMSUNG Proprietary-Contents may change without notice

4-6

NAM Programming

LCD Display Key in Function

CDMA fSID <or> -CDMA foreign SID, current status is displayed.

Yes changes the system.

-stores it.

CDMA fNID <or> -CDMA foreign NID, current status is displayed.

Yes changes the system.

-stores it.

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

20 to change, enter new one.

-stores it.

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

65535 to change, enter new one.

-stores it.

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

20 to change, enter new one.

-stores it.

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

65535 to change, enter new one.

-stores it.

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

20 to change, enter new one.

-stores it.

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

65535 to change, enter new one.

-stores it.

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

20 to change, enter new one.

-stores it.

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

65535 to change, enter new one.

-stores it.

4-3 Setting Up NAM 2

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’

OK/

+ 44 hidden pages