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DUAL MODE(CDMA+AMPS)
ELECTRONIC PORTABLE TELEPHONE
SCH-870
Manual
SERVICE
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
MENU OK / 8. PCB Diagram
SEND END/ 9. Schematic Diagrams
1. '
2 ABC 3 DEF
4 GHI 5 JKL 6 MNO
7 PQRS 8 TUV 9 WXYZ
0 OPER
ELECTRONICS
Samsung Electronics Co.,Ltd. Dec. 00
Pinted in Korea.
Code No.: GH68-01765A
2. Nam Programming
LCD Display Key in Function
menu + 60,626 -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
Yes 835235 -to change, press < or >
OK -store it
2-1 Samsung Electronics
LCD Display Key in Function
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_VOIC_EVRC < 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
835235 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.
Samsung Electronics 2-2
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
1700 Phone number -to change, enter new one.
OK -store it.
NAM2 Digital
Home NID 01 1st CDMA Home Network ID, current status is displayed
1 Phone number -to change, enter new one.
OK -store it.
NAM2 Digital
Home SID 02 2nd CDMA Home system ID, current status is displayed
1700 Phone number -to change, enter new one.
OK -store it.
NAM2 Digital
Home NID 02 2nd CDMA Home Network ID, current status is displayed
2 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.
2-3 Samsung Electronics
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
Samsung Electronics 2-4
3. Test Commands & Test Procedure List
3-1 Test Command Table
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) T_SUSPEND_I Enter to test menu
02(3F,0,0) T_RESTART_I Escape from test menu
04(1D,0,1) T_GET_MODE_I Get mode CDMA/FM
07(81,0,0) T_CARRIERON_I Turn on the carrier
08(82,0,0) T_CARRIEROFF_I Turn off the carrier
09(83,4,0) T_LOADSYN_I Load the synthesizer for locking
10(84,1,0) T_PWRLEVEL_I Change RF power level
11(85,0,0) T_RXMUTE_I Mute rx audio
12(86,0,0) T_RXUNMUTE_I Unmute rx audio
13(87,0,0) T_TXMUTE_I Mute tx audio
14(88,0,0) T_TXUNMUTE_I Unmute tx audio
15(89,10) T_VOC_ESEC_I Echo Canceller On/Off
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(ST)
18(92,20) T_LCD_CONTRAST_I Tune LCD contrast
20(9E,3,0) T_LNA_GAIN_WR_I write LNA gain for IMD test
21(9C,5,0) T_TEST_SYS_I set test system & Channel
22(91,96,96) T_SNDNAM_I1) Display & Send NAM Information
23(95,3,4) T_SNDVERSION_I1) Display & Send Software Version
24(9F,7,8) T_SNDESN_I1) Display & return ESN
25(92,0,0) T_BACKLIGHT_ON_I Backlight on
26(93,0,0) T_BACKLIGHT_OFF_I Backlight off
27(96,0,0) T_DATASVC ON Data Service On
28(97,0,0) T_DATASVC OFF Data Service Off
30(9D,15,0) T_PLINE_I Display and return production date
31(00,1,0) T_AUTOANSWER_I Enable Auto-answer mode
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 Continuously send TX Control data
37(A5,3,0) T_RXRAS_FLATNESS_I Adjust CDMA RX RAS flatness.
38(A6,3,0) T_VOC_ENC_OFFSET_I Vocoder ENC offset
39(A7,3,0) T_VOC_DEC_OFFSET_I Vocoder DEC offset
40(A7,3,0) T_VOC_CDMA_UNITY_GAIN_I Vocoder CDMA unity gain
41(A9,3,0) T_VOC_FM_HFRX_UPGAIN_I Vocoder FM hfrx upgain
42(AA,1,0) T_DTMFON_I2) Turn on DTMF
43(AB,0,0) T_DTMFOFF_I Turn off DTMF
44(B0,0,0) T_COMPANDORON_I Turn on compandor
45(B1,0,0) T_COMPANDOROF_I Turn off compandor
46(B2,0,0) T_FM_VCLINE_I* Enter FM voice state
47(B3,3,0) T_FM_AUD_GAIN_I FM audio gain
3-1 Samsung Electronics
Command No Command SW Name Description
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
52(B9,0,8) T_HW_VERSION_I View HW version
53(BA,3,0) T_CARRIER_I Target Carrier option (Change banner)
54(BB,7,8) T_VOC13K_I Target Service option
55(AC,1,0) T_EXT_AUDIO_I External Audio Path On/Off
57(BC,0,0) T_MIC_ON_I Unmute MIC Path
58(BD,0,0) T_MIC_OFF_I mute MIC Path
59(BE,0,0) T_ALLPATH_I Tune on the all audio path
60(BF,3,0) T_FM_TX_GAIN_I2)3) AMPS Tx Audio Gain Control
61(C0,3,0) T_FM_RX_GAIN_I2)3) AMPS Rx Audio Gain Control
62(C1,3,0) T_DTMF_VOL_TX_I2)3) AMPS Tx DTMF Gain Control
63(C2,3,0) T_TX_LIMITER_I2)3) AMPS Tx Limiter Gain Control
64(C3,3,0) T_FM_SAT_LEVEL_I2)3) AMPS Tx SAT level Control
65(C4,3,0) T_FM_FREQ_SGAIN_I2)3) AMPS Tx Master Gain Control
66(C5,3,0) T_FM_ST_GAIN_I2)3) AMPS Tx ST Gain Control
67(C6,0,6) T_READ_BATT_I1) Saved Low battery value read
68(C8,0,3) T_VBATT1_I3) Set the low battey position in the standby
69(C9,0,3) T_VBATT2_I3) Set the low battey position in the talking
70(CA,3,0) T_WRITE_BATT_I3)3) write a BATT
71(D1,3,0) T_CDMA_TXADJ_I2) Sets tx_agc_adj for CDMA mode
72(D2,3,0) T_FM_TXADJ_I2) Sets tx_agc_adj for AMPS mode
73(D3,1,0) T_SET_PA_R_I2) Sets PA R1,R0 range bits
75(D5,0,3) T_READ_RSSI_I3) Read a RSSI
76(D6,3,0) T_CDMA_CH_FLATNESS_BP_ON_I Adjust CDMA TX low power RAS flatness
77(D7,0,3) T_READ_TEMP_I Read a TEMP
79(D9,1,0) T_BUZZER_ON_I2) Buzzer on
80(DA,0,0) T_BUZZER_OFF_I Buzzer off
81(E3,0,0) T_VOC_PCMLPON_I Turn on to play a PCM LOOP BACK
82(E4,0,0) T_VOC_PCMLPOFF_I Turn off to play a PCM LOOP BACK
83(E5,0,0) T_BYPASS_ON_I Set Low power mode
84(E6,0,0) T_BYPASS_OFF_I Set High power mode
85(E7,0,0) T_SPEAKER_ON_I Turn on the speaker path
86(E8,0,0) T_SPEAKER_OFF_I Tturn off the speaker path
87(E9,0,0) T_FM_LOOP_TEST_I FM loop back
88(EA,3,0) T_TRK_ADJ_I3) TRK LOCAL ADJUST
89(EB,3,0) T_CDTRK_ADJ_I CDMA TRK LOCAL ADJUST
90(F0,2,0) T_FM_CH_FLATNESS_I Adjust FM channel flatness
92(D4,5,0) T_TXRAS_ADJ_I CDMA TX high power RAS table( not adjustable )
93(F3,4,0) T_RXRAS_ADJ_I CDMA RX RAS table( not adjustable )
96(F6,4,0) T_CH_FLATNESS_I Adjust TX high power RAS
97(F2,4,0) T_FM_TX_PWR_I Adjust FM Power level 2 ~ 7
98(F8,3,0) T_TXRAS_ADJ_BP_ON_I CDMA TX low power RAS table( not adjustable)
99(FC,4,0) T_SND_GAIN_I Mic/Speaker Gain control
Samsung Electronics 3-2
4. Test Procedure
4-1 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
4-2 Configuration of Test
Spectrum Analyzer
RF In
HP8924C
RF Audio Audio
In/Out Out In
Directional
Coupler
To A-Out
Test Jig
To A-In
DC Power Supply
(+3.93V)
g CAUTION : The test jig and data cable has a voltage drop of 0.33V at FM Max power output,
you'd better set the DC power supply to 3.93V for normal test condition.
(Nominal voltage of battery is 3.6V at cellular phone)
4-1 Samsung Electronics
4-3 Test Cable Description for SCH-870
1. Test Cable
3
2
1
4
5
6
2. Test Cable Connections
1 MHC 172
2 RF CABLE 91.4db Loss for CDMA800 and AMPS
3 BNC CONNECTOR (RF)
4 PLUG CONNECT TO SCH-870
5 DATA CABLE
6 Dsub 25PIN CONNECTOR (DATA)
Samsung Electronics 4-2
3. Dsub 25 PIN CONNECTOR PIN DESCRIPTION (TEST CABLE 1, BACK SIDE)
DATA Dsub CONN. DATA Dsub CONN.
DESCRIPTION PIN NO. DESCRIPTION PIN NO.
V_F 12,21 DP_RX_DATA 8
DGND 2, 4, 6, 13, 19 HP_PWR 9
BATT 15, 16, 22 RI 10
C_F 3,20 CD 11
TX_AUDIO 5 RTS 14
DP_TX_DATA 7 CTS 17
RX_AUDIO 1 DTR 18
14 15 16 17 18 19 20 21 22 23 24 25
1 2 3 4 5 6 7 8 9 10 11 12 13
4. CONVERSION TABLE OF FREQUENCY vs CHANNEL
TY P E CHANNEL CONVERSION EQUATION REMARK
TX 1 N 799 F=0.03 X N + 825.00 N ; CH NUMBER
FREQUENCY 990 N 1023 F=0.03 X (N-1023) + 825.00 F ; FREQUENCY
RX 1 N 799 F=0.03 X N + 870.00 (AMPS/CDMA)
FREQUENCY 990 N 1023 F=0.03 X (N-1023) + 870.00
4-3 Samsung Electronics
4-4 Test Procedure
4-4-1 Change to Test Mode
A. To change the phone's state from Normal Mode to Test Mode, You should enter the following keys.
"* 7 5 9 # 8 1 3 5 8 0"
B. The command "21" is mode and channel change , press "OK" to save.
"10000" or "10001" : AMPS's Sytem A and Sytem B
"20363"
Channel number
Mdoe : CDMA
C. The command "0 1" is Suspend.
D. To finish the Test Mode, You should enter the command "0 2".
4-4-2 Channel Selection and Tx Power Output Level Control
1.AMPS(FM)
A. Enter to Test Mode ("* 7 5 9 # 8 1 3 5 8 0").
B. The command "21" is mode and channel change
"10000" or "10001" : AMPS's Sytem A and Sytem B
C. To finish the Test Mode, You should enter the command "0 2".
D. "0 1" : Suspend.
E. "4 6" : Vocoder initial to Analog mode.
F. "0 9 0 3 6 3 #" : Set to `0363' channel.
G. "0 7" : Carrier On.
H. "9 7 * * * " : Output RF power level is set as power level 2
"* * *" means AGC level and AGC level range is from 0 to 511.
I. "1 0 2" : RF Power level control, 2(0~7) means power level .
Samsung Electronics 4-4
2. CDMA
A. Enter to Test Mode ( "* 7 5 9 # 8 1 3 5 8 0" ).
B. The command "21" is mode and channel change , press "OK" to save.
"20363"
Channel number
Mdoe : CDMA
C. To finish the Test Mode, You should enter the command "0 2".
D. "0 1" : Suspend.
E. "0 9 0 3 6 3 #" : Set to `0363' channel.
F. "0 7" : Carrier On.
G. "3 4" : Spread spectrum to 1.23MHz band width.
H. "8 4" : High Power-mode On
I. "9 6 * * * " : Output RF power level is set max power
"* * *" means AGC level and AGC level range is from 000 to 511.
4-5 Samsung Electronics
4-5 Test Procedure
1. AMPS(FM)
TEST ITEMS PROCEDURE
1. PREPARATION Set test equipments up.
Confirm that the phone is in the Analog Mode!
( "10000" or "10001" at Test Command "2 0".)
"* 7 5 9 # 8 1 3 5 8 0" : Enter the Test Mode
"0 1" : Suspend
"4 6" : Initialize Vocoder in Analog mode
If a wrong key would be selected, press "#", and then enter new command.
To exit the Test Mode at any time, just press [0 2].
2. RF "0 1" : Suspend.
POWER "4 6" : Initialize Vocoder in Analog mode.
"0 9 0 3 6 3 #" : Set channel to 363.
"0 7" : Carrier On.
"1 0 2" : RF Power level selection, "2" means one of the power levels (0~7).
Measurement of the Power Output Levels
Level RF Power
0~2 + 26.5 dBm + 0.3/-4 dB
3 + 23 dBm + 2/-4 dB
4 + 19 dBm + 2/-4 dB
5 + 15 dBm + 2/-4 dB
6 + 12 dBm + 2/-4 dB
7 + 9 dBm + 2/-4 dB
"0 8" : Carrier off
Note 1 : In case of using the antenna cable, compensation for th cable loss should be added
(about 1.5dB).
Note 2 : To prevent phones from being damaged, they must be measured only by calibrated test
equipments.
Warning !
Adjustments without calibrated equipments can cause phones to be heated excessively and
would void the warranty.
3. TX "0 1" : Suspend.
FREQUENCY "4 6" : Initialize Vocoder in Analog mode.
"0 9 0 3 6 3 #" : Set channel to 363.
"0 7" : Carrier On.
Measure the TX frequency : 835.89 MHz ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo