Samsung SCH-850 Service Manual
DUAL MODE(CDMA+AMPS)
PORTABLE
TELEPHONE
SCH-850
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Manual
DUAL MODE TELEPHONE CONTENTS
1. Specification
2. Nam Programming
3.Test Commands & Test Procedure List
4.Test Procedure
5. Exploded View & its Parts List
6. Electrical Parts List
7. Block Diagram
8. PCB Diagram
9. Schematic Diagrams
SERVICE
Samsung Electronics Co.,Ltd.Dec.99
Pinted in Korea.
Code No.: GH68-00947A
ELECTRONICS
Samsung Electronics
1-1
1. Specification
1-1 General
ITEM
Tx Freq. range
Rx Freq. range
Channel Bandwidth
Channel Spacing
Number of Channel
Duplex Separation
Type of Emission
In/Output Impedance
Tx Intermediate Freq.
Rx Intermediate Freq.
Tx Local Freq.
Rx Local Freq
TCXO freq.
Freq. Stability
Operating Temperature
CDMA
824 ~ 849MHz
869 ~ 894MHz
1.23MHz
30KHz
832
45MHz
40K0F8W,40K0F1D
50Ω
130.38MHz
85.38MHz
1st (F
TX
+130.38MHz)
2nd (260.76MHz)
1st (170.76MHz)
2nd (F
RX
+85.38MHz)
19.68MHz
(F
RX
-45MHz)± 300Hz
-30°C ~ +60°C
AMPS
824 ~ 849MHz
869 ~ 894MHz
30KHz
30KHz
832
45MHz
40K0F8W,40K0F1D
50Ω
130.38MHz
85.38MHz
1st (FTX+130.38MHz)
2nd (260.76MHz)
1st (170.76MHz)
2nd (F
RX
+85.38MHz)
19.68MHz
± 2.5ppm
-30°C ~ +60°C
Supply Voltage 3.6V
Size and Weight Slim : 88mm X 50mm X 23.5mm, 105 g, 500 mA
STD : 88mm X 50mm X 25.7mm, 135 g, 1000 mA
EXT : 88mm X 50mm X 27.5mm, 151 g, 1600 mA
1-2 800MHz CDMA
1) General
Frequency Range
• Transmitter : 824 ~ 849 MHz
• Receiver : 869 ~ 894MHz
Channel Bandwidth : 1.23MHz
Channel Spacing : 30kHz
Number of Channels : 832
Duplex Seperation : 45 MHz
Type of Emission : 40K0F8W,40K0F1D
Input/Output Impedance : 50 Ω
Intermediate Freequency
• Transmitter : 130.38MHz
• Receiver : 85.38MHz
Local Frequency
• Transmitter : 1st(FTX+130.38MHz), 2nd(260.76MHz)
• Receiver : 1st(FRX+85.38MHz), 2nd(170.76MHz)
TCXO Frequency : 19.68MHz
Frequency Stability : (FRX-45MHz) ± 300Hz
Operation Temperature : -30°C ~ 60°C
Supply Voltage : +3.6V
2) Transmitter
Waveform Quality :0.944 or more
Open Loop Power Control Range
• -25dBm : -57.5dBm ~ -38.5dBm
• -65dBm : -17.5dBm ~ +1.5dBm
• -104dBm : +18.0dBm ~ +30dBm
Minimum Tx Power Control : below -50dBm
Closed Loop Power Control Range : ±24dB
Maximum RF Output Power : 200mW(+23dBm)
Occupied Bandwidth : 1.23MHz
Conducted Spurious Emission @900 KHz : -42dBc/30kHz
@1.25 MHz : -54dBc/30kHz
Samsung Electronics
1-2
3) Receiver
Rx Sensitivity and Dynamic Range : -104dBm, FER=0.5% or less
: -25dBm, FER=0.5% or less
Conducted Spurious Emission
• 869 ~ 894 MHz : <-81dBm
• 824 ~ 849 MHz : <-61dBm
• All Other Frequencies : <-47dBm
Single Tone Desensitization : lower than 1 %
Rx power level = -101dBm
Tone power level = -30dBm
Tone offset from carrier = ±900 kHz
Intermodulation Spurious Response Attenuation : lower than 1 %
Rx power = -101dBm
Tone 1 power =-43dBm
Tone 2 power =-43dBm
Tone 1 offset from carrier = ± 900kHz
Tone 2 offset from carrier = ± 1.700MHz
1-3
Samsung Electronics
1-3 800MHz AMPS
1) General
Frequency Range
• Transmitter : 824 ~ 849 MHz
• Receiver : 869 ~ 894 MHz
Channel Spacing :30kHz
Number of Channels : 832
Duplex Spacing : 45MHz
Frequency Stability : ±2.5ppm(-30°C ~ 60°C, -22°F ~ 140°F)
Modulation/Demodulation
• Voice : PM
• Data : FM
Operating Temperature :-30°C ~ 60C, -22°F ~ 140°F
Supply Voltate : 3.6V
2) Transmitter
RF output power : 0.6W(+2/-4dB)
Carrier ON/OFF conditions
“ON” Condition : within ±3dB of specification output(in 2 ms)
“OFF” Condition : below -60dBm(in 2ms)
Compresssor
Compression Rate : 2 : 1
Attack Time : 3ms
Recovery Time : 13.5ms
Reference Input : input power level for producing a nominal ±2.9kHz
: peak frequency deviation of transmitted carrier
Preamphasis : 6dB/OCT within 0.3 ~ 3 kHz
Maximum Frequency Deviation
F3 of G3 : ±12 kHz
Supervisory Audio Tone : ±2 kHz(±10%)
Signaling Tone : ±8 kHz(±10%)
Wideband Data : ±8 kHz(±10%)
Post Deviation Limiter Filter
3.0 ~ 5.9 kHz : above 40 LOG(F/3000)dB
5.9 ~ 6.1 kHz : above 35dB
6.1 ~ 15 kHz : above 40 LOG(F/3000)dB
Over 15 kHz : above 28 dB
Samsung Electronics
1-4
Spectrum Noise Suppression
For all modulation
fo +20 kHz ~ fo + 45 kHz : above 26dB
For modulation by voice and SAT
fo + 45 kHz : above 63dB+10LOG(PY)dB
For modulation by WBD(without SAT) and ST(with SAT)
fo +45 kHz ~ fo + 60 kHz : above 45 dB
fo +60 kHz ~ fo + 90 kHz : above 65 dB
fo +90 kHz ~ 2 fo : above 63 dB + 10 LOG(PY) dB
(where fo = carrier frequency
PY=mean output power in watts)
Harmonic and conducted Spurious Emissions : below 43 + 10 LOG(PY) dB
3) Receiver
De-emphasis : -6dB/OCT within 0.3 ~ 3 kHz
Expandor
Expandor Rate : 1 : 2
Attack time : within 3 ms
Recovery Time : within 13.5 ms
Reference input : output power level to a 1000Hz tone from a carrier within ±2.9 kHz
peak frequency deviation
Sensitivity : 12 dB SINAD/-116dBm
Intermodulation Spurious Response Attenuation : above 65dB
RSSI Range : above 60dB
Protection Against Spurious Response Interference : above 60dB
In Band Conducted Spurious Emission
Transmit Band : below -60 dBm
Receive Band : below -80 dBm
Out of Band Conducted Spurious Emissions : below -47dBm
Radiated Spurious Emission
Frequency Range : Maximum Allowable EIRP
25 ~ 70MHz : -45dBm
70 ~ 130MHz : -41dBm
130 ~ 174 MHz : -41 ~ -32dBm
174 ~ 260 MHz : -32 dBm
260 ~ 470 MHz : -32 ~ -26 dBm
470 ~ 1G MHz : -21 dBm
1-5
Samsung Electronics
2. Nam Programming
LCD Display Key in Function
menu + 60,654321 -selects NAM programming
NAM program 1 -choose ‘Setup NAM1’
1:Setup NAM1
2:Setup NAM2
NAM1
Phone # -directory number
1234567890 Phone number -to change, enter new one.
OK -store it.
NAM1
Directory # -directory number
1234567890 Phone number -to change, enter new one.
OK -store it.
NAM1
Activate PRL -PRL status
No < or > -to activate PRL, press < or >
OK -store it.
NAM1
Anlg HomeSID System ID for home, current ststus is displayed.
4369 ID number -to change, enter new one.
OK -store it.
NAM1
Dgtl HomeSID System ID for home, current ststus is displayed.
4369 ID number -to change, enter new one.
OK -store it.
NAM1
More Prog.? General NAM setup
No < or > -to change, press < or >
OK -store it
Samsung Electronics
2-1
NAM program 1 Choose ‘ General’
1. General
2. Setup NAM1
3. Setup NAM2
General
ESN -Electronic Serial Number of the phone is displayed
B0000000 OK -Press OK, to view next status item.
General
CAI version -Common Air Interface version is displayed
3 OK -Press OK, to view next status item.
General
VOC Select
SO_VOICE_08K < or > -to change Vocoder rate, press < or >
OK - store it
General
SCM -Station Class Mark displays the power class,
01101010 transmission, slotted class, dual mode.
OK -Press OK, to view next status item.
General
Service Code Service code, current ststus is displayed
654321 6-digit code -to change, enter new code.
OK -store it
General
Lock Code Lock code, current ststus is displayed
0000 4-digit code -to change, enter new code.
OK -store it
General
Slot Mode Slot mode. ‘Yes’indicates the slot mode.
Yes < or > -changes the status.
OK -store it.
General
Slot Index Slot mode index. The higher, the longer sleeping time
2 0-7 -to change, enter new one.
OK -store it.
General
Roundup Timer Roundup Timer.
No < or > -to change the status.
OK -store it.
2-2
Samsung Electronics
LCD Display Key in Function
NAM program 3 choose ‘Setup NAM2’
1. General
2. Setup NAM1
3. Setup NAM2
NAM2 Digital
IMSI_MCC IMSI Moble Country Code, current code is displayed.
000 number -to change, enter new one.
OK -store it.
NAM2 Digital
IMSI_MNC
IMSI Mobile Network Code, current code is displayed.
00 number -to change, enter new one.
OK -store it.
NAM2 Digital
Phone # -Phone number
1234567890 Phone number -to change, enter new one.
OK -store it.
NAM2 Digital
Directory # -directory number
1234567890 Phone number -to change, enter new one.
OK -store it.
NAM2 Digital
Home SID 01
1st CDMA Home system ID, current status is displayed
1 Phone number -to change, enter new one.
OK -store it.
NAM2 Digital
Home NID 01
1st CDMA Home Network ID, current status is displayed
65535 Phone number -to change, enter new one.
OK -store it.
NAM2 Digital
Home SID 02
2nd CDMA Home system ID, current status is displayed
1 Phone number -to change, enter new one.
OK -store it.
NAM2 Digital
Home NID 02
2nd CDMA Home Network ID, current status is displayed
65535 Phone number -to change, enter new one.
OK -store it.
————— repeated to SID 20 & NID 20——————————
NAM2 Digital
Lockout SID01 1st lock system ID,current status is displayed.
0 ID number -to change, enter new one.
OK -store it.
Samsung Electronics
2-3
LCD Display Key in Function
NAM2 Digital
Lockout SID02 2nd lock system ID,current status is displayed.
0 ID number -to change, enter new one.
OK -store it.
—————- repeated to Lockout SID10————————————-
NAM2 Digital
CDMA Home SID CDMA Home system ID, current status is displayed
Yes < or > -changes the status.
OK -store it.
NAM2 Digital
CDMA fSID CDMA foreign SID, current status is displayed.
Yes < or > -changes the system.
OK -store it.
NAM2 Digital
CDMA fNID CDMA foreign NID, current status is displayed.
Yes < or > -changes the system.
OK -store it.
NAM2 Digital
CDMA ACCOLC
CDMA Access Overload Class, current status is displayed.
6 class number -to change, enter new one.
OK -store it.
NAM2 Analog
Phone # -Phone number
1234567890 Phone number -to change, enter new one.
OK -store it.
NAM2 Analog
Directory # -directory number
1234567890 Phone number -to change, enter new one.
OK -store it.
NAM2 Analog
Home SID Analog Home system ID, current status is displayed
1 Phone number -to change, enter new one.
OK -store it.
NAM2 Analog
Auto Reg Auto Registration, current status is displayed
Yes < or > -changes the status.
OK -store it.
NAM2 Analog
ACCOLC
Analog Access Overload Class, current status is displayed.
6 class number -to change, enter new one.
OK -store it
2-4
Samsung Electronics
LCD Display Key in Function
3. Test Commands & Test Procedure List
3-1 T est Command T able
To change the phone from normal mode to test mode, you should enter the following keys :
Press [*759#813580]
Command No Command SW Name Description
01(1F,0,0)
02(3F,0,0)
04(1D,0,1)
07(81,0,0)
08(82,0,0)
09(83,4,0)
10(84,1,0)
11(85,0,0)
12(86,0,0)
13(87,0,0)
14(88,0,0)
15(89,10)
16(8F,0,0)
17(90,0,0)
18(92,20)
20(9E,3,0)
21(9C,5,0)
22(91,96,96)
23(95,3,4)
24(9F,7,8)
25(92,0,0)
26(93,0,0)
27(96,0,0)
28(97,0,0)
30(9D,15,0)
31(00,1,0)
32(A0,1,0)
33(A1,0,0)
34(A2,0,0)
37(A5,3,0)
38(A6,3,0)
39(A7,3,0)
40(A7,3,0)
41(A9,3,0)
42(AA,1,0)
43(AB,0,0)
44(B0,0,0)
45(B1,0,0)
46(B2,0,0)
47(B3,3,0)
T_SUSPEND_I
T_RESTART_I
T_GET_MODE_I
T_CARRIERON_I
T_CARRIEROFF_I
T_LOADSYN_I
T_PWRLEVEL_I
T_RXMUTE_I
T_RXUNMUTE_I
T_TXMUTE_I
T_TXUNMUTE_I
T_VOC_ESEC_I
T_STON_I
T_STOFF_I
T_LCD_CONTRAST_I
T_LNA_GAIN_WR_I
T_TEST_SYS_I
T_SNDNAM_I1)
T_SNDVERSION_I1)
T_SNDESN_I1)
T_BACKLIGHT_ON_I
T_BACKLIGHT_OFF_I
T_LAMP_ON_I
T_LAMP_OFF_I
T_PLINE_I
T_AUTOANSWER_I
T_SATON_I*2)
T_SATOFF_I*
T_CDATA_I
T_RXRAS_FLATNESS_I
T_VOC_ENC_OFFSET_I
T_VOC_DEC_OFFSET_I
T_VOC_CDMA_UNITY_GAIN_I
T_VOC_FM_HFRX_UPGAIN_I
T_DTMFON_I2)
T_DTMFOFF_I
T_COMPANDORON_I
T_COMPANDOROF_I
T_FM_VCLINE_I*
T_FM_AUD_GAIN_I
Enter to test menu
Escape from test menu
Get mode CDMA/FM
Turn on the carrier
Turn off the carrier
Load the synthesizer for locking
Change RF power level
Mute rx audio
Unmute rx audio
Mute tx audio
Unmute tx audio
Echo Canceller On/Off
Transmit a continuous Signaling Tone(ST)
Stop transmit a continuous Signaling Tone(ST)
Tune LCD contrast
write LNA gain for IMD test
set test system & Channel
Display & Send NAM Information
Display & Send Software Version
Display & return ESN
Backlight on
Backlight off
LAMP on
LAMP off
Display and return production date
Enable Auto-answer mode
Enable the transmission of SAT
Disable the transmission of SAT
Continuously send TX Control data
Adjust CDMA RX RAS flatness.
Vocoder ENC offset
Vocoder DEC offset
Vocoder CDMA unity gain
Vocoder FM hfrx upgain
Turn on DTMF
Turn off DTMF
Turn on compandor
Turn off compandor
Enter FM voice state
FM audio gain
Samsung Electronics
3-1
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