C903
1228-1147 rev. 1
TROUBLESHOOTING
System Connector Protection Test
T
R
O
UBL
ESHOOT
ING
- Current Consumption Test
System Connector Protection Test
Perform the Ohm measurements by using the DMM instrument (Fluke).
Note!
T
he Battery must be removed from the Phone during this test.
Note!
Connect the Black probe to the X2405_PIN 9 (GND).
PIN_1
PIN_9 GND
PIN_12
System Conn.
X2405
(PIN Position)
Ohm
Measurements
(Ohm)
SL 4
(Repair Action)
SL 5
(Repair Action)
1
0L
L2468
N2421 if lower
C2439 if lower
X2405
2
0
L2406 if higher
X2405 if higher
3
10k - 12k
L2401 if higher
N3101 if lower or higher
X2405 if higher
C2462 if lower
4
0.9k – 1.1k
L2402 if higher
N3101 if lower or higher
X2405 if higher
C2463 if lower
5
0.9k – 2.2k
L2403 if higher
N3101 if lower or higher
X2405 if higher
C2448 if lower
6
0.9k – 2.2k
L2404 if higher
N3101 if lower or higher
X2405 if higher
C2447 if lower
7
75
V2430 if lower
X2405 if higher
C2445 if lower
L2405 if higher
C2444 if lower
N2700 if lower or higher
8
350k – 700k
V2417 if lower
N2422 if lower or higher
X2405 if higher
R2434 if higher
R2468 if higher
9
0 Ohm GND
R2449 if higher
X2405 if higher
10
35k – 0L
Z2400
V2421 if lower
N2420 if lower
X2405
R2445
C2461 if lower
11
250k – 360k
Z2400 if higher
V2420 if lower
N2420 if lower or higher
X2405 if higher
R2446 if higher
C2460 if lower
12
85k – 110k
R2490 if higher
V2412 if lower
V2202 if lower
C2440 if lower
C2441 if lower
Current Consumption Test
Step 1:
Insert a Local SIM Card and use the phone with the Signalling SW (SSW).
Use Dummy Battery connected to Power Supply Channel 1 (VBATT).
Instrument settings: Voltage: 3.8 Volt, Limiter 3A.
Note!
The Dummy Battery should have approximately 120K Ohm resistance between GND
and BDATA.
Measure the current consumption when Phone is turned off.
Take a note of the current consumption at Power Supply Channel 1 (VBATT).
The Current consumption in off mode should be less than 1mA.
If more than 1mA go to
Dead Phone Problems part 1 TRS guide
.
Step 2:
Turn the Phone On:
Measure the deep sleep current max 6mA typical between 0-3mA. Make sure that the
operator is running with deep sleep mode.
Note!
This operation can be switched off by operator if network is busy or heavily-loaded.
If phone using more than 6mA, then go to EMMA and run Software Update Contents Refresh
(SUCR SW).
Step 3 with Fault Trace SW application:
-
Flash the phone with ETS SW
-
Use Dummy Battery connected to the Power Supply Channel 1 (VBATT)
-
Use Fault Trace SW
Connect the:
-
Dummy Battery connected to the Power Supply Channel 1 (VBATT):
Instrument settings: Voltage: 3.8 Volt, Limiter 3 A
-
Connect DCIO/SEPI to the phone:
Instrument settings: Voltage: 5 Volt, Limiter 2 A
Perform the following tests:
-
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
Limits GSM 850 MHz
-
Transmitter Current Limits: 300mA
-
Tolerance: ±20%
SEMC Troubleshooting Manual
33
(129)
