SAMSUNG SCH210 Service Manual
CDMA PORTA B L E
Manual
C E L L U L A R T E L E P H O N E
SCH-210
S E RVICE
CDMA PORTABLE CELLULAR TELEPHONE
CONTENTS
1. General Introduction
2. Specification
3. Installation
4. NAM Programming
5. Product Support Tools
6. Circuit Description
7. Troubleshooting
8. Exploded Views and Parts List
9. PCB Diagrams
10. Electrical Parts List
11. Block & Circuit Diagrams
Samsung Electronics Co.,Ltd.
GH68-60756A
1. General Introduction
The SCH-210 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-210 is composed of main handset, rapid charger, cradle, two batteries (1300 mAh, 850 mAh), handsfree kit, and travel charger. Hands-Free Kit is designed to be operated in half-duplex mode taking turnaround delay between the phone and the system into account.
Samsung Electronics - Contents may change without notice. 1-1
General Introduction
1-2 Samsung Electronics - Contents may change without notice.
2. Specification
£´60 -22 ~ 140 )
Operating Temperature : 20 ~ £´50 ( 4 ~ 122 )
Operating Voltage
HHP : 7.2V DC ( 10 )
Hands-free : 13.7V DC ( 10 )
Size and Weight
including standard battery : 130 51 27.5 mm, 205 g (5.12 2 0.94 inch, 7.2 oz)
including extended-life battery : 130 51 37 mm, 207 g (5.12 2 1.46 inch, 7.4 oz)
Operating Time
Digital mode Standby Time : about 50 ~ 55 hours (with standard battery)
: about 85 ~ 90 hours (with extended-life battery)
Talk Time : about 150 min (with standard battery)
: about 250 min (with extended-life battery)
Analog Standby Time : about 10 ~ 12 hours (with standard battery)
: about 16 ~ 18 hours (with extended-life battery)
Talk Time : about 100 min (with standard battery)
: about 170 min (with extended-life battery)
2-2 Analog Mode
TRANSMITTER
RF output power : 0.6 W ( 2/ 4 dB)
Carrier ON/OFF Conditions
"ON" Condition : within 3 dB of specification output (in 2mS)
"OFF" Condition : below 60 dBm (in 2mS)
Compressor
Compression Rate : 2:1
Attack Time : 3 mS
Recovery Time : 13.5 mS
Reference Input : Input level for producing a nominal 2.9 kHz peak frequency
deviation of transmitted carrier
2-1 General
Frequency Range Digital Mode Analog Mode
Transmitter : 824.64 ~ 848.37 MHz 824.04 ~ 848.97 MHz
Receiver : 869.64 ~ 893.37 MHz 869.04 ~ 893.97 MHz
Channel Spacing : 1.23 MHz 30 kHz
Number of Channels : 20 FA 832 CHs
Duplex Spacing : 45 MHz
Frequency Stability : 2.5 ppm ( 30 ~
Samsung Electronics - Contents may change without notice. 2-1
Specification
Preamphasis : 6 dB/OCT within 0.3 ~ 3 kHz
Maximum Frequency Deviation
F3 of G3 : 12 kHz ( 10 )
Supervisory Audio Tone : 2 kHz ( 10 )
Signaling Tone : 8 kHz ( 10 )
Wideband Data : 8 kHz ( 10 )
Post Deviation Limiter Filter
3.0 kHz ~ 5.9 kHz : above 40LOG (F/3000) dB
5.9 kHz ~ 6.1 kHz : above 35 dB
6.1 kHz ~ 15 kHz : above 40LOG (F/3000) dB
Over 15 kHz : above 28 dB
Spectrum Noise Suppression
For All Modulation
f 20 kHz ~ f 45 kHz : above 26 dB
For Modulation by Voice and SAT
f 45 kHz : above 63 10LOG (Py) dB
For Modulation by WBD (without SAT) and ST (with SAT)
f 45 kHz ~ f 60 kHz : above 45 dB
f 60 kHz ~ f 90 kHz : above 65 dB
f 90 kHz ~ 2f : above 63 10LOG (Py) dB
(where f = carrier frequency
Py= mean output power in watts)
Harmonic and Conducted Spurious Emissions : above 43 10LOG (Py) dB
RECEIVER
DE-Emphasis : 6 dB/OCT within 0.3 ~ 3 kHz
Expander
Expansion Rate : 1:2
Attack Time : within 3 mS
Recovery Time : within 13.5 mS
Reference Input : Output level to a 1000 Hz tone from a carrier within 2 . 9
kHz peak frequency deviation
Sensitivity : 12 dB SINAD/ 116 dBm
Intermodulation Spurious Response Attenuation : above 65 dB
RSSI Range : above 60 dB
Protection Against Spurious Response Interference : above 60 dB
In Band Conducted Spurious Emissions
Transmit Band : below 60 dBm
Receive Band : below 80 dBm
Out of Band Conducted Spurious Emissions : below 47 dBm
2-2 Samsung Electronics - Contents may change without notice.
£´1.5 dBm
104 dBm £´18.0 dBm ~ £´30.0 dBm
Standby Output Power : below 61 dBm
Closed Loop TX Power Control Range : Test 1 beyond 24 dB
Test 2 0 mS ~ 2.5 mS
Test 3 beyond 24 dB
Test 4 beyond 24 dB
Test 5 beyond 24 dB
Maximum Allowable EIRP
45 dBm
41 dBm
41 ~ 32 dBm
32 dBm
32 ~ 26 dBm
21 dBm
Frequency Range
25 ~ 70 MHz
70 ~ 130 MHz
130 ~ 174 MHz
174 ~ 260 MHz
260 ~ 470 MHz
470 ~ 1 GHz
Radiated Spurious Emissions
Specification
2-3 Digital Mode
Waveform Quality : above 0.944
Time Reference : within 1uS
RX Sensitivity : 104 dBm, FER = within 0.5%
Dynamic Range : 104 dBm ~ 25 dBm, FER = within 0.5%
TX Output Power : Maximum 320 mW (25dBm)
TX Frequency Deviation : within 300 Hz
Occupied Band Width : 1.32 MHz
TX Conducted Spurious Emissions : 900 kHz below 42 dBc / 30 kHz
: 1.98 MHz below 54 dBc / 30 kHz
Minimum TX Power Control : below 50 dBm
Open Loop Power Control : 25 dBm 57.0 dBm ~ 38.5 dBm
65 dBm 17.5 dBm ~
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Specification
MSC Transmitter Frequency
FA NO. CH. NO. CENTER FREQUENCY FA NO. CH. NO. CENTER FREQUENCY
1 1011 824.640MHz 11 404 837.120MHz
2 29 825.870MHz 12 445 838.350MHz
3 70 827.100MHz 13 486 839.580MHz
4 111 828.330MHz 14 527 840.810MHz
5 152 829.560MHz 15 568 842.040MHz
6 193 830.790MHz 16 609 843.270MHz
7 234 832.020MHz 17 650 844.270MHz
8 275 833.250MHz 18 697 845.910MHz
9 316 834.480MHz 19 738 847.140MHz
10 363 835.890MHz 20 779 848.370MHz
MSC Receiver Frequency
FA NO. CH. NO. CENTER FREQUENCY FA NO. CH. NO. CENTER FREQUENCY
1 1011 869.640MHz 11 404 882.120MHz
2 29 870.870MHz 12 445 883.350MHz
3 70 872.100MHz 13 486 884.580MHz
4 111 873.330MHz 14 527 885.810MHz
5 152 874.560MHz 15 568 887.040MHz
6 193 875.790MHz 16 609 888.270MHz
7 234 877.020MHz 17 650 889.270MHz
8 275 878.250MHz 18 697 890.910MHz
9 316 879.480MHz 19 738 892.140MHz
10 363 880.890MHz 20 779 893.370MHz
2-4
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2-4 CDMA Debug Display Information (menu 8)
IN IDLE MODE
Sxxxxx : SID (System ldentification) toggle
Nxxxxx : NID (Network Identification) toggle
Specification
SIDxxxxx Slx x
T xx Rxxx xx
Pxxx CHxxxx
IN CONVERSATION MODE
TVx RVx xx x
T xx Rxxx xx
Pxxx CHxxxx
Slx : Slot cycle index (lowest between the system
and the phone will be used)
Handset Status : 0 - Acquisition
1 - Synchronization
2 - Paging (Idle)
3 - Traffic Initialization
4 - Traffic Mode
5 - Exit
T-xx : Tx adjust, Value ranges from +63 ~-63dB
Dxxx or Rxxx : sector power in dBm
-xx : ec/I
Pxxx : PN offset or Pilot #
CHxxxx : channel number
TV : Tx vocoder rate (8 is full rate, 1 is 1/8th rate)
RV : Rx vocoder rate (8 is full rate, 1 is 1/8th rate)
xx : Walsh code used in traffic channel
o
2-5 FM Debug Display Information (menu 8)
SIDxxxxx : FM Home System ID
PWRx : Power Level 0~7
SATx : Supervisory Audio Tone code (0~3)
SIDxxxxx x
PWRx RSSIxxx
SATx CHxxxx
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x (Using Frequency Band) : A Band or B Band
RSSIxxx : RSSI value
CHxxx : Using Channel
Specification
2-6 Samsung Electronics - Contents may change without notice.
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") 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.
3-2 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 remove the battery pack, release it by
pressing the button on the rear of the phone.
4. Slide the battery pack downward about 1cm
(1/2") and lift it away from the phone.
Press this button to release
the battery pack
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
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Installation
Item Model Name Service Part#
Desk Top Rapid Charger DTC58 GH44-40034A
Standard Battery Pack BTL850SB GH43-10104A
Extended Battery Pack BTL1350EB GH43-10103A
SPECIFICATIONS USING “DTC 58”
Product Charging time Stand by time (hours) Talking time (min)
(hours) Digital Analog Digital Analog
Standard Battery Pack (Li-ion: 800mAh) 2 ~ 3 50 ~ 55 10 ~ 12 150 100
Extendard Battery Pack (Li-ion: 1350mAh) 2.5 ~ 3.5 85 ~ 90 16 ~ 18 250 170
3-3 For Mobile Mount
3-3-1 Antenna
1. Choose a proper location to install the
antenna.
The center of the roof top provides the best
performance.
The edge of the rear trunk also provides a
good performance. However, the antenna
should be higher than the roof of the car.
In 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.
3-2 Samsung Electronics - Contents may change without notice.
3-3-2 Cradle
Installation
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
Samsung Electronics - Contents may change without notice. 3-3
Installation
3-3-3 Hands-Free Box
1. Drill holes in a proper location for the handsfree box, attach the mounting bracket by using
the screws. See the figure 3-3.
2. Install the hands-free box into the bracket.
3-3-4 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 3-3 Hands-Free Box Installation
3-4 Samsung Electronics - Contents may change without notice.
3-3-5 Cables
Installation
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 battery (-) terminal.
Then connect the orange wire to the switched
side of the ignition switch, and then connect
the brown wire 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.
Figure 3-4 Cable Connections
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Installation
3-6 Samsung Electronics - Contents may change without notice.
6. Circuit Description
6-1 Logic Section
6-1-1 Power Supply
With the battery installed on the phone and by
pressing the PWR key, the VBATT and ON_SW
signals will be connected. This will turn on Q102
(2SC4081BR) and will drive DC-DC converter
(U123) to output 5.0V. This in turn will be
supplied to pin 6 of regulators (U121 and U122),
thus releasing them from the shut-down state to
output regulated 3.3V.
The VBATT applied to ON_SW will turn on Q103
(DTC144EE) resulting in the signal
ON_SW_SENSE to change state from HIGH to
LOW. This will allow MSM to send out PS_HOLD
(logical HIGH) to turn on Q102 even after the
PWR key is released.
The voltage (+3.3V) from U121 is used in the
digital parts of MSM and BBA. The voltage
(+3.3AV) from U122 is used in the analog part of
BBA. The voltage from U124 (output of 5V) is used
for the audio circuitry.
6-1-2 Logic Part
The Logic part consists of internal CPU of MSM,
RAM, ROM and EEPROM. The MSM receives
TCXO and CHIPX8 clock signals from the BBA
and controls the phone during the CDMA and the
FM mode. The major components are as follows:
CPU : INTEL 80186 core
FROM : U126 (MBM29LV800T) - 8MBIT
FLASH ROM
SRAM : U127 (KM68V2000I) - 2MBIT
STATIC RAM
EEPROM : U113 (AT24C128) - 128KBIT SERIAL
EEPROM
CPU
INTEL 80186 CMOS type 16-bit microprocessor is
used for the main processing. The CPU controls all
the circuitry. For the CPU clock, 27MHz resonator
is used.
FLASH ROM
One 8 MBIT FROM is used to store the terminal's
program. Using the down-loading program, the
program can be changed even after the terminal is
fully assembled.
SRAM
One 2 MBIT SRAM is used to store the internal
flag information, call processing data, and timer
data.
EEPROM
One 128 KBIT EEPROM is used to store ESN,
NAM, power level, volume level, and telephone
number.
KEYPAD
For key recognition, key matrix is setup using
SCAN0-6 of STORE signals and KEY0-3 of input
ports of MSM. Eight LEDs and backlight circuitry
are included in the keypad for easy operation in
the dark.
LCD MODULE
LCD module contains a controller which will
display the information onto the LCD by 8-bit data
from the MSM. It also consists a DC-DC converter
to supply -3.5V for fine view angle and LCD
reflector to improve the display efficiency.
Samsung Electronics - Contents may change without notice. 6-1
Circuit Description
6-1-3 Baseband Part
MOBILE SYSTEM MODEM (MSM)
The MSM equipped with the INTEL 80186 CPU
core is an important component of the CDMA
cellular phone. The MSM comes in a 176 pins
TQFP package. The interface block diagram is
shown on page 6-3.
MICROPROCESSOR INTERFACE
The interface circuitry consists of reset circuit,
address bus (A0-A19), data bus (AD0-AD15), and
memory controls (ALE, DT_R, HWR/, LWR/,
RAM_CS/, ROM_CS).
INPUT CLOCK
CPU clock: 27 MHz
TXCO/4 (pin 34): 4.92 MHz. This clock signal
from the BBA is the reference clock for the MSM
except in CDMA mode.
CHIPX8 : 9.8304 MHz. The reference clock used
during the CDMA mode.
ADC Interface
ADC_CLK (pin 3), ADC_ENABLE (pin 1) and
ADC_DATA (pin 2) are required to control the
internal ADC in the BBA.
Data Port Interface
Includes the UART. Also, supports Diagnostic
Monitor (DM) and HP equipment interface.
CODEC Interface
The MSM outputs 2.048 MHz PCM_CLK (pin 19)
and 8 KHz CODEC_SYNC (pins 16,20) to the
CODEC (U117). The voice PCM data from the
MSM (U101) PCM_DIN (pin135) is compressed
into 8KHz by QCELP algorithm in the CDMA
mode. In FM mode, the data is processed by
D_FM.
RF Interface
BBA INTERFACE
CDMA, FM Data Interface
TXIQDATA0-7 (pins 24-32) : TX data bus used
during both CDMA and FM mode.
C_RX_IDATA0-3 (pins 16-20) and
C_RX_QDATA0-3 (pins 12-15) : RX data bus
used during CDMA mode.
FM_RX_IDATA (pin 7) and FM_RX_QDATA
(pin 8) : RX data bus used during FM mode.
Clock
TX_CLK (pin 22), TX_CLK/(pin 23) : Analog to
Digital Converter (ADC) reference clock used in
TX mode.
CHIPX8 : ADC reference clock used in CDMA
RX mode.
FMCLK : Reference clock in FM RX mode.
TX : TX_AGC_ADJ (pin 35) port is used to control
the TX power level and PA_ON (pin 44) signal is
used to control the power amplifier.
RX : AGC_REF (pin 36) port is used to control the
RX gain and TRK_LO_ADJ (pin 45) is used to
compensate the TCXO clock.
General Purpose I/O Register Pins
Input/output ports to control external devices.
Power Down Control
When the IDLE/ signal turns LOW, only the TX
sections will be disabled. If both the IDLE/ and
SLEEP/ changes to LOW, all the pins except for
the TXCO is disabled.
6-2 Samsung Electronics - Contents may change without notice.
Circuit Description
Figure 6-1 Baseband Block Diagram
Samsung Electronics - Contents may change without notice. 6-3
Circuit Description
6-1-4 Audio Part
TX AUDIO PATH
The voice signal output from microphone is
filtered and amplified by the internal OP-AMP
and is converted to PCM data by the CODEC
(U117). This signal is then applied to the MSM
(U101)'s internal vocoder.
RX AUDIO PATH
The PCM data out from the MSM is converted to
audio signal by ADC of CODEC (U117), is then
amplified by the speaker amplifier (U111) to be
sent to the speaker unit.
FM TX PATH
Pre-Emphasis Circuit
The circuit features +6dB/oct to reduce signal loss
and noise in Tx path.
Compressor
RX AUDIO PATH
De-Emphasis Circuit
This circuit is 1st LPF featuring -6dB/oct to reduce
signal loss and noise in Rx path.
Expander
The expander features 1:2 level to reduce signal
loss and noise in Rx path. The zero crossing level
of the expander is 2.9 kHz/dev, attack time is 3
mS, and release time is 13.5 mS.
Volume Adjust
Volume can be adjusted up to 4 steps for the user
to obtain a proper loudness of received signal.
6-1-5 TX WBD, ST, And SAT
These signals are generated from MSM. The
modulation level of TX WBD and ST is
8kHz/dev, and SAT is 2kHz/dev.
The compressor features 2:1 level to reduce signal
loss and noise in Tx path. The zero crossing level
of the compressor is 2.9 kHz/dev, attack time is
3 mS, and release time is 13.5 mS.
Limiter
The limiter performs to cut 0.53 Vp-p or higher
audio signal level so that the FM frequency
deviation is not over 12kHz/dev. The function
is used to avoid confusion over phone line. LPF is
used to reduce a specific high frequency of limited
signal.
6-1-6 Buzzer Driving Circuitry
Buzzer generates alert tone. When the buzzer
receives the timer signal from the MSM, it
generates alert tone. The buzzer level is adjusted
by the alert signal's period generated from the
MSM timer.
6-1-7 Key Tone Generator
Ringer signal (pin 49) out from MSM (U101) is
passed through 2 serial LPF consisting of R141,
C145, R145, and C142, amplified at the speaker
amp (U111), and comes out to speaker. In handsfree mode, the key tone is applied to RX audio line
through the LPF and C153, R142.
6-4 Samsung Electronics - Contents may change without notice.
6-2 Receiver Section
Circuit Description
LOW NOISE AMPLIFIER (LNA)
The low noise amplifier featuring 1.5dB and 16 dB
gain amplifies a weak signal received from the
base station to obtain the optimum signal level.
DOWN CONVERTER (MIXER)
First local signal is applied to this down converter.
The down converter transfers the signal amplified
at the LNA into 85.38 MHz IF signal. 85 MHz IF
signal is made by subtracting 881 12.5 MHz RF
signal from 966 12.5MHz first local signal.
RX IF AUTOMATIC GAIN CONTROLLER
(AGC) AMP
85.38 MHz IF signal is applied to IF AGC amp, the
IF AGC output level is applied to BBA (Baseband
Analog ASIC). The IF AGC amp (U302) keep the
signal at a constant level by controlling the gain.
Dynamic range is 90 dB, up gain +45dB, and down
gain -45dB.
IF SAW BAND PASS FILTER FOR CDMA
IF SAW BPF (F303) is used for CDMA system
having 1.23 MHz wide band and 630 kHz band
width. The filter also eliminates the image product
generated at the mixer.
BUFFER
Buffer (Q342) amplifies signal to be applied to the
local input of the down converter (U301) when a
phase is locked between VCO (U341) and PLL IC
(U342).
VOLTAGE CONTROLLED OSCILLATOR
The VCO (U341) generates the signal having 966
MHz center frequency and 12.5 MHz deviation
with the voltage control. PLL IC (U342) controls
this signal.
PHASE LOCKED LOOP (PLL)
RF BAND PASS FILTER (BPF)
The RF BPF (F302) accepts only a specific
frequency (881 12.5MHz) from the signal
received from the mobile station. The band width
is 25 MHz.
IF SAW BAND PASS FILTER FOR AMPS
IF SAW BPF (F304) is used for AMPS system
having 30 kHz channel spacing and 15 kHz
band width. The filter also eliminates the image
product generated at the mixer.
Input reference frequency is generated at
VC_TCXO (U343) and the divided signal is
generated at VCO (U341). PLL compares the two
signals and generates the desired signal with a
pre-programmed counter which controls voltage.
VOLTAGE CONTROLLED TEMPERATURE
COMPENSATED CRYSTAL OSCILLATOR
It provides 19.68 MHz reference frequency to the
mobile main set. A correct frequency tuning is
made by the voltage control.
THERMISTOR
The thermistor (U371) detects temperature. It is
used to compensate active component
characteristics due to the temperature difference.
Samsung Electronics - Contents may change without notice. 6-5
Circuit Description
DUPLEXER
Duplexer (F301) controls to transmit through the
antenna only the signals within acceptable Tx
frequency range (836 12.5 MHz) and to receive
through the antenna only the signals within
acceptable Rx frequency range (881 12.5 MHz).
It also matches LNA (U301) input in receiving part
and PA output in transmitter part with the
antenna.
6-3 Transmitter Section
BASEBAND ANALOG ASIC (BBA)
BBA (U401) consists of ADC, DAC, LPF
(FM/CDMA), divider, VCO, logic control circuit,
PLL, and mixer.
BBA performs a specific function between RF part
and logic part, with MSM. The IF signal out from
Rx IF AGC amp is secondly converted through the
down-converter. The signal passes through the
CDMA or FM filter, converts to digital signal
through ADC, then is sent to MSM. The digital
signal out from MSM converts to analog signal
through DAC. The analog signal converts to the IF
signal through each filter and the up-converter.
POWER SUPPLY REGULATOR
The power supply regulator (U381, U382)
generates a regulated power (3.6VR).
ANTENNA
Antenna (ANT1) allows signals to send to receive
from the base station.
IF AUTOMATIC GAIN CONTROLLER AMP
The signal out to the base station should be a
constant level. The TX IF AGC amp (U460)
controls power to keep the signal at a constant
level. Dynamic range is 85 dB, up gain +40dB, and
down gain -45dB.
RF BAND PASS FILTER (BPF)
The RF BPF (F451) accepts only a specific
frequency (836 12.5MHz) to send it out to the
base station. The band width is 25 MHz.
POWER SUPPLY SWITCHING
POWER AMP MODULE
Power supply switching (Q483) turns on
Power Amp module (U467) amplifies signal (28 dB
Gain) to be sent out to the base station through the
antenna .
TX_POWER when the phone is in traffic mode and
supplies power to the circuits.
ISOLATOR
UP CONVERTER (MIXER)
The up-converter (U461) receives the first local
signal to generate 836 12.5 MHz from the signal
controlled by TX IF AGC amp (U460). 836 12.5
MHz signal comes out from the mixer output by
subtracting 130 MHz IF signal from 966 12.5
MHz first local signal. The driver amp and this upconverter are packaged into one in U461.
6-6 Samsung Electronics - Contents may change without notice.
Isolator (U468) is used to reduce a reflected signal
to protect the power amp module from being
damaged.
POWER SUPPLY REGULATOR
The power supply regulator (U482, U483) supply a
regulated power to each part of transmitter. U483
supplies 4.7V to TX mixer (U461) and OP amp
(U463). U482 supplies 3.6 V to TX IF AGC amp
(U460).
6-4 Rapid Desk-Top Charger
Rapid Charger, DTC58 is composed of power supply part and control part.
Circuit Description
6-4-1 Power Supply Part (Flyback type
SMPS circuit)
AC INPUT
AC input protection circuit and rectifier circuit
AC power through the AC plug is rectifiered to
DC power of high voltage through the BD1 and
C2. MOV1 is used by protection circuit from AC
power surge. F1 is fuse to prevent over current. C1
and LF1 is EMI noise protection filter of switching
power.
Switching controller and transformer
IC1 supplies constant voltage and constant current
to secondary circuit through the transformer. D1,
D2 absorbs the reverse voltage when transformer
winding turns off.
SECONDARY POWER
Secondary DC/DC converter circuit : Q2, D8, L3,
C19
It changes the DC output voltage to 8.4V through
step-down chopper method.
Reverse current protection circuit : D6, D7
When power is off, it protects the reverse flow of
current from battery pack.
6-4-2 Control Part
MICOM CONTROLLER : HIC
HIC is include u-COM to controlled whole
charging system and include following internal
circuit :
-General Input/Output port
-A/D converter
-Reset delay circuit (Power on delay)
-Timer
Output constant voltage circuit : HIC, IC7, VR1
The HIC detects output voltage and compares it
with reference voltage in HIC. The error is FED to
primary circuit by IC7A. The feeback error is
converted to current by IC7B and D3. The current
controlls IC1.
It is carried following functions :
-Battery Recognition
-Charging termination condition detection
-Output short detection and output protection
-Temperature detection
BATTERY RECOGNITION CIRCUIT : HIC
Secondary rectifier circuit : D4, D5, C8, C11
The secondary AC output of transformor is
rectified to DC voltage.
Secondary filter circuit : L1, L2, C9, C12
It minimizes the high frequency ripple noise,
which is caused by primary oscilation.
Samsung Electronics - Contents may change without notice. 6-7
Battery identity detection determined to voltage
detection battery internal between C/F and GND.
Circuit Description
CURRENT DETECTION CIRCUIT : R5, R6,
R11, R12, HIC
Battery charging current is changed voltage
through R5, R6, R11, R12. This voltage inputed
u-COM to 16 times amplifiered through HIC.
VOLTAGE DETECTION CIRCUIT : HIC
u-COM A/D through HIC pin 12, 13 detected
voltage.
6-5 Hands-Free Kit
6-5-1 Charging Circuit
BATTERY TEMPERATURE DETECTION
CIRCUIT : HIC, TH1
Battery temperature detection determined
temperature by ues of thermistor registor variation
of THI by HIC.
CURRENT LIMIT CIRCUIT : HIC
When soft-change, current detection circuit
limited current flow to battery, reference voltage
more than detected current, detected current and
HIC internal reference voltage.
6-5-3 Speaker circuit
A constant voltage is used for the hands-free kit.
This circuit converts DC 12V input current to 8.4V
DC to charge the battery. When the battery is fully
charged, the charge current drops and the circuit
operates as a constant voltage.
6-5-2 u-Processor
Micro processor controls charging power and
charging current to protect the phone. It also
allows to communicate with a HHP, and to
convert from hands-free mode to private mode,
and vice verse. It adjusts speaker volume at 8 steps
and attenuates echo and noise occurred during
conversation.
This circuit eliminates HHP noise, and controls
the sound quality and speaker volume using
analog C-mos IC which checks the speaker signal
up to 8 steps. 5W audio amplifier amplifies the
speaker signal.
6-5-4 Microphone Circuit
This circuit separates ground to eliminate the
noise occurring from the HHP antenna and
microphone. u-processor controls this circuit to
attenuate echo which may occur in Land side.
6-8 Samsung Electronics - Contents may change without notice.
6-6 Test Procedure
6-6-1 Configuration of Test
Circuit Description
Items needed to purchase from SAMSUNG.
Items Parts # Remark
RF Test Cable GH97-00687A
Test JIG GH80-10502A Including
(RF Interface Pack Ass’y) 1. Power Cable (Black, Red)
2. 9-pin RS232 Data Cable
DM Cable GH39-30515A
Samsung Electronics - Contents may change without notice. 6-9
Circuit Description
6-6-2 List of Equipment
- DC Power Supply
- Test Jig
- Test Cable
- CDMA Mobile Station Test Set HP8924C, HP83236A, CMD-80 etc
- Spectrum Analyzer (include CDMA Test Mode) HP8596E
TEST JIG
TEST CABLE
Test Cable Connections
1 Plug Connect to SCH-210
2 BNC Connector (RF)
3 Dsub 25Pin Connector (DATA)
4 RF Cable
5 Data Cable
6-10 Samsung Electronics - Contents may change without notice.
Dsub 25 Pin Connector Pin Description
(Test Cable 1, Back Side)
Data Description Dsub CONN. Pin No.
Vcc 4, 5, 6
GND 13, 23, 24, 25
PW ON/OFF 7
TX Audio 10
TX Data 22
RX Audio 12
RX DATA 21
RSSI 8
Circuit Description
6-7 Test Command Table
Command No. Command SW Name Description
(OP, AB, RB)
01(1F, 0, 0) T_SUSPEND_I Terminate the normal mode, enter to the test mode.
02(3F, 0, 0) T_RESTART_I Terminate the test mode, enter to the normal mode.
03(FD, 0, 0) T_SAVE_VAL_I Save value in EEPROM. (Only for Auto test)
04(1D, 0, 1) T_GET_MODE_I Get mode. (CDMA or FM)
Return value '0' is FM mode, '1' is CDMA mode.
05(1C, 1, 0) T_SET_MODE I Set mode to CDMA or FM. (Only for Auto test)
'0' is FM mode, '1' is CDMA mode.
06(1E, 0, 0) T_WRITE_NV_I Write an EEPROM item. (one of the NV items)
07(81, 0, 0) T_CARRIERON_I Turn the carrier on.
08(82, 0, 0) T_CARRIEROFF_I Turn the carrier off.
09(83, 4, 0) T_LOADSYN_I
10(84, 1, 0) T_PWRLEVEL_I
2)
2)
Set the synthesizer to the channel specified by ch_ data.
Set the RF power attenuation to the value specified.
11(85, 0, 0) T_RXMUTE_I Mute the receive-audio signal.
12(86, 0, 0) T_RXUNMUTE_I Unmute the receive-audio signal.
13(87, 0, 0) T_TXMUTE_I Mute the transmit-audio signal.
14(88, 0, 0) T_TXUNMUTE_I Unmute the transmit-audio signal.
16(8F, 0, 0) T_STON_I Transmit a continuous Signaling Tone (ST).
17(90, 0, 0) T_STOFF_I Stop transmit a continuous Signaling Tone.
22(91,96,96) T_SNDNAM_I
23(95, 3, 4) T_SNDVERSION_I
24(9F, 7, 8) T_SNDESN_I
1)
1)
1)
Display and send NAM information.
Display and return S/W version.
Display and return ESN.
25(92, 0, 0) T_BACKLIGHT_ON_I Turn on the backlight.
26(93, 0, 0) T_BACKLIGHT_OFF_I Turn off the backlight.
27(96, 0, 0) T_LAMP_ON_I Turn on the LAMP.
28(97, 0, 0) T_LAMP_OFF_I Turn off the LAMP.
29(9A, 5, 0) T_REBUILD_I Rebuild EEPROM.
30(9D,16, 0) T_PLINE_I Display and return production date.
32(A0, 1, 0) T_SATON_I
2)
Enable the transmission of SAT.
33(A1, 0, 0) T_SATOFF_I Disable the transmission of SAT.
34(A2, 0, 0) T_CDATA_I Transmit continuous 5-word Reverse CTL CH message.
35(A3, 0, 0) T_VOLUME_UP_I Increase value of the last command. (Only for autotest)
36(A4, 0, 0) T_VOLUME_DOWN_I Decrease value of the last command. (Only for autotest)
38(A6, 3, 0) T_VOC_ENC_OFFSET_I Vocoder ENC offset.
39(A7, 3, 0) T_VOC_DEC_OFFSET_I Vocoder DEC offset.
Samsung Electronics - Contents may change without notice. 6-11
Circuit Description
Command No. Signal. Name Description
(OP, AB, RB)
40(A8, 4, 0) T _ V O C _ C D M A _ U N I T Y _ G A I N _ I Vocoder ENC offset.
41(A9, 3, 0) T _ V O C _ F M _ H F R X _ U P G A I N _ I Vocoder DEC offset.
42(AA, 1, 0) T_DTMFON_I
2)
Activate DTMF generator with keycode.
43(AB, 0, 0) T_DTMFOFF_I Deactivate DTMF generator.
44(B0, 0, 0) T_COMPANDORON_I Enable the compressor and expandor.
45(B1, 0, 0) T_COMPANDOROF_I Disable the compressor and expandor.
46(B2, 0, 0) T_FM_VCLINE_I Enter Analog voice channel state.
47(B3, 3, 0) T_FM_AUD_GAIN_I FM audio gain.
48(B4, 0, 0) T_VIBRATOR_ON_I Activate a vibrator.
49(B5, 0, 0) T_VIBRATOR_OFF_I Inactivate a vibrator.
50(B6, 0, 4) T_BATT_TYPE_I Battery type.
51(B7, 1, 1) T_BBA_I BBASIC supplier
52(B9, 2, 2) T_HW_VERSION_I HW version
53(BA, 3, 0) T_CARRIER_I Target Carrier option.
54(BB, 0, 0) T_VOC13K_I Target Service option.
55(BC, 0, 0) T_EXT_AUDIO_I External Audio Path On/Off.
57(BC, 0, 0) T_MIC_ON_I Mic path on.
58(BD, 0, 0) T_MIC_OFF_I Mic path off.
59(BE, 0, 0) T_ALLPATH_I Set RX Path, TX path Unmute to Earpiece.
60(BF, 3, 0) T_FM_TX_GAIN_I
61(C0, 3, 0) T_FM_RX_GAIN_I
62(C1, 3, 0) T_DTMF_VOL_TX_I
63(C2, 3, 0) T_TX_LIMITER_I
64(C3, 3, 0) T_FM_SAT_LEVEL_I
65(C4, 3, 0) T_FM_FREQ_SGAIN_I
66(C5, 3, 0) T_FM_ST_GAIN_I
67(C6, 3, 6) T_READ_BATT_I
68(C8, 0, 3) T_VBATT1_I
69(C9, 0, 3) T_VBATT2_I
70(CA, 3, 0) T_WRITE_BATT_I
71(D1, 3, 0) T_CDMA_TXADJ_I
72(D2, 3, 0) T_FM_TXADJ_I
73(D3, 1, 0) T_SET_PA_R_I
2)3)
2)3)
2)3)
2)3)
2)3)
2)3)
2)3)
1)
3)
3)
3)3)
2)
2)
2)
FM TX Audio Gain Control.
FM RX Audio Gain Control.
FM TX DTMF Gain Control.
FM TX Limiter Gain Control.
FM TX SAT level Control.
FM TX Master Gain Control.
FM TX ST Gain Control.
Reads low batt. Value in Standby, or Talk mode.
Set the low battery position in the standby.
Set the low battery position in the talking.
Write low battery Level Value to NVM.
Change pdm TX AGC in CDMA.
Change pdm TX AGC in FM.
Set PA R1, R0 in CDMA.
74(D4, 3, 0) T_TXADJ_0DBM_I Sets tx_agc_adj for fm mode.
6-12 Samsung Electronics - Contents may change without notice.
Command No. Signal. Name Description
(OP, AB, RB)
Circuit Description
75(D5, 0, 3) T_READ_RSSI_I
76(D6, 3, 0) T_WRITE_RSSI_I
3)
3)
Read a RSSI.
Writes RSSI value.
77(D7, 0, 3) T_READ_TEMP_I Read Temp.
78(D8, 0, 3) T_READ_HDET_I Read High Detect.
79(D9, 1, 0) T_BUZZER_ON_I
2)
Buzzer On at DTMF 0 key.
80(DA, 0, 0) T_BUZZER_OFF_I Buzzer Off.
81(E3, 0, 0) T_VOC_PCMLPON_I Play a PCM LOOP BACK.
82(E4, 0, 0) T_VOC_PCMLPOFF_I Play off a PCM LOOP BACK.
84(E6, 3, 0) T_WR_CD_TXLIMIT_I
2)3)
85(E7, 0, 0) T_SPEAKER_ON_I Turn on the speaker path.
86(E8, 0, 0) T_SPEAKER_OFF_I Turn off the speaker path.
87(E9, 0, 0) T_FM_LOOP_TEST_I Play a PCM FM loopback.
88(EA, 0, 0) T_TRK_ADJ_I
3)
FM TRK_LO_ADJ control.
89(EB, 3, 0) T_CDTRK_ADJ_I CDMA TRK _LO_ADJ control.
90(F0, 3, 0) T_FM_HIGH_CH_PWR_I Compensated value for high chan PWR.
91(F0, 3, 0) T_FM_LOW_CH_PWR_I Compensated value for low chan PWR.
92(F2, 3, 0) T_FM_TX_PWR_2_I
93(F3, 3, 0) T_FM_TX_PWR_3_I
94(F4, 3, 0) T_FM_TX_PWR_4_I
95(F5, 3, 0) T_FM_TX_PWR_5_I
96(F6, 3, 0) T_FM_TX_PWR_6_I
97(F7, 3, 0) T_FM_TX_PWR_7_I
2)3)
2)3)
2)3)
2)3)
2)3)
2)3)
Setting the volume for Power Level 2.
Setting the volume for Power Level 3.
Setting the volume for Power Level 4.
Setting the volume for Power Level 5.
Setting the volume for Power Level 6.
Setting the volume for Power Level 7.
99(F9, 3, 0) T_FM_MOST_CH_PWR_I Compensated value for Power Level 2.
100(FF, 3, 0) T_MAX_I Compensated value for Most chan PWR.
1)
The AB (Input Argument Byte Number) values of these commands are used only in the manual test. In
automatic test mode, the AB is regarded as 0.
2)
You can assign the value for these commands. If the AB value is assigned without argument, the test is
achieved with the value stored in EEPROM.
3)
After you get a desired test value by performing these commands, if you want to save the value into
EEPROM, use T-SAVE-VAL-I command to store the test value into the corresponding position.
OP: Operation Command Number
AB: Input Argument Byte Number
RB: Return Byte Number
SAT 32, 33 are not operating in MSM2 CHIP test
46 command is required in Rx, and Tx path test at FM mode
Samsung Electronics - Contents may change without notice. 6-13
Circuit Description
6-8 Rapid Travel Charger
Rapid Charger, TC59-US is composed of power supply part and control part.
6-8-1 Power Supply Part (Flyback type
SMPS circuit)
AC INPUT
AC input protection circuit and rectifier circuit
AC power through the AC plug is rectifiered to
DC power of high voltage through the D1, D2, D3,
D4, C1 and C2. MOV1 is used by protection circuit
from AC power surge. F1 is fuse to prevent over
current. L1 and L2 is EMI noise protection filter of
switching power.
Switching controller and transformer
U1 supplies constant voltage and constant current
to secondary circuit through the transformer. D5,
D6 absorbs the reverse voltage when transformer
winding turns off.
Secondary filter circuit : L20, C22
It minimizes the high frequency ripple noise,
which is caused by primary oscilation.
Reverse current protection circuit : D20
When power is off, it protects the reverse flow of
current from battery pack.
6-8-2 Control Part
MICOM CONTROLLER : U4
U4 is include u-COM to controlled whole charging
system and include following internal circuit :
-General Input/Output port
-A/D converter
-Reset delay circuit (Power on delay)
-Timer
SECONDARY POWER
Output constant voltage circuit : U4, D24, R17
The HIC detects output voltage and compares it
with reference voltage in HIC. The error is FED to
primary circuit by U2B. The feeback error is
converted to current by U2A and D7. The current
controlls U1.
Secondary rectifier circuit : D21, C21
The secondary AC output of transformor is
rectified to DC voltage.
It is carried following functions :
-Battery Recognition
-Charging termination condition detection
-Output short detection and output protection
-Temperature detection
BATTERY RECOGNITION CIRCUIT : U4
Battery identity detection determined to voltage
detection battery internal between ID and GND.
6-14 Samsung Electronics - Contents may change without notice.
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