Samsung SCH 620 User manual

SERVICE

PORTABLE CELLULAR

TELEPHONE

SCH-620

Manual

PORTABLE CELLULAR TELEPHONE 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

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1. General Description

The SCH-620 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 Systems

•IS-98A : Standards for Dual-Mode Wideband Spread Spectrum Cellular Mobile Station

•IS-126 : Mobile Station Loopback Service Options Standard

SCH-620 is composed of main handset, rapid charger, three batteries (1600 mAh, 1000 mAh, 550mAh), hands-

free kit, car adaptor, and travel charger. Hands-Free Kit is designed to be operated in full-duplex mode taking

turn-around delay between the phone and the system into account.

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 ~ 849 MHz 824 ~ 849 MHz

Receiver : 869 ~ 894 MHz 869 ~ 894 MHz

Channel Spacing : 1.23 MHz 30 kHz

Number of Channels : 20 FA 832 CHs

Duplex Spacing : 45 MHz 45 MHz

Frequency Stability : ±2.5 ppm (-30˚C ~ +60˚C, -4˚F ~ +140˚F)

Operating Temperature : -30˚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 Weight (g)

including slim battery 105 x 45 x 18 89

including standard battery 105 x 45 x 21 117

including extended battery 105 x 45 x 24 138

Item Standby Time Talk Time

slim battery up to 75 hours up to 90 min

standard battery up to 155 hours up to 200 min

extended battery up to 250 hours up to 330 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

Colsed 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%)

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

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

64 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

1. To attach the battery pack after charging, align it with the phone about 1cm (1/2 inch away from its place so

that the two arrows on the phone are seen, the battery charge contacts pointing downward.

2. Slide the battery pack upwards until it clicks firmly into position. The phone is now ready to be turned on.

3. To remove the battery pack, release it by pressing the button on the rear of the phone.

4. Slide the battery pack downward about 1cm (1/2inch and lift it away from the phone.

Press this button to

release the battery pack

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 “DTC 61AB”

Product Charging time (hours) Stand by time (hours) Talking time(min)

Front Rear Digital Digital

Slim Battery Pack (Li-ion: 500mAh) 2 2 75 90

Standard Battery Pack (Li-ion: 1000mAh) 2 2 155 200

Extended Battery Pack (Li-ion: 1600mAh) 2.5 6 250 330

Item Model Name Service Part#

Desk Top Rapid Charger DTC61AB GH44-00063A

Slim Battery Pack BTI61AB GH43-00157A

Standard Battery Pack BTS61AB GH43-00140C

Extended Battery Pack BTE61AB GH43-00132D

STANDARD

BATTERY PACK

SLIM

BATTERY PACK EXTENDED

BATTERY PACK

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.

HANDS

FREE BOX

CELLULAR

PHONE

CRADLE

CLAM SHEEL

MOUNT UPPER

CLAM SHEEL

MOUNT LOWER

FIXED SCREW

CAR

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