C702
1221-7857 rev. 1
TROUBLESHOOTING
Current Consumption Test
TROU
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- Transmitter current 1900 MHz at Ch: 512 power level 0. Typical 365mA
- Transmitter current WCDMA BAND I Low RX Ch: 10562 at 23dBm output
power. Max 700mA
If current consumption is not correct, the fault could be fixed by running SERP
calibration, if not then go to GSM and WCDMA Network problems TRS guides.
If the current consumptions are equal to test limits then go to Charging Test.
Step 4 with Fault Trace SW application:
-
Flash the phone with ITP SW
-
Use TRS Fixture
-
Connect the:
Power Supply Channel 1 VBATT:
Instrument settings: Voltage: 3.8 Volt, Limiter 3A
Power Supply Channel 2 DCIO/SEPI
Instrument settings: Voltage: 5 Volt, Limiter 2A
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Connect DCIO/SEPI Cable to the phone
Perform the following tests:
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Max TX Power GSM 850 MHz
Fault Trace SW settings:
TX and RX GSM
GSM Mode Settings:
TX Switched
GSM Radio Settings:
Select Band: GSM 850
Channel: 128
Power Level: 5
-
Max TX Power GSM 900 MHz
Fault Trace SW settings:
TX and RX GSM
GSM Mode Settings:
TX Switched
GSM Radio Settings:
Select Band: GSM 900
Channel: 1
Power Level: 5
GSM Radio Settings:
Select Band: DCS 1800
Channel: 512
Power Level: 0
-
Max TX Power PCS 1900 MHz
Fault Trace SW settings:
TX and RX GSM
GSM Mode Settings:
TX Switched
GSM Radio Settings:
Select Band: PCS 1900
Channel: 512
Power Level: 0
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Max TX Power WCDMA BAND I
Fault Trace SW settings:
TX and RX WCDMA
Radio Settings:
Select Band: BAND I
Fast Select Channels: Ch LOW
Modes: Max Pwr 23dBm
Compare current consumption during Max TX Power Tests with the current
consumption limits below.
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Transmitter current 850 MHz at Ch: 128 power level 5. Typical 255mA
-
Transmitter current 900 MHz at Ch: 1 power level 5. Typical 255mA
- Transmitter current 1800 MHz at Ch: 512 power level 0. Typical 225mA
- Transmitter current 1900 MHz at Ch: 512 power level 0. Typical 225mA
- Transmitter current in WCDMA BAND I Low RX Ch: 10562 mode at max
power level 23 dBm and Rx on.Typical 615mA
Tolerance: ±10%
If current consumption is not correct, the fault could be fixed by running SERP
calibration, if not then go to GSM and WCDMA Network problems TRS guides.
If the current consumptions are equal to the sheet then go to Charging Test.
-
Max TX Power DCS 1800 MHz
Fault Trace SW settings:
TX and RX GSM
GSM Mode Settings:
TX Switched
SEMC Troubleshooting Manual
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Summary of Contents for C702
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