K850
1203-2528 rev. 1
TROUBLESHOOTING
SIM Problems
TROU
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START
Load ITP SW into the phone.
Use TRS Fixture.
Connect: Fixture Combo
reader to the PBA and
Insert Test SIM
Connect:
VBATT and DCIO/SEPI
Use Fault Trace SW
No
Sim Com Test
Passed
1.8 Volt DC
At MP SIM1
(Fixture Sim reader
Pin 1)
Yes
Yes
SL 5 Replace
C2410
SL 4 Scrap
SL 5 Replace
N2000
SL 4 Scrap
Replace
X2409
Yes
Remove Test SIM
and Insert
Dummy SIM
Restart the Phone
Use:
Fault Trace SW
Activate:
SIMVCC
SIMVCC on
Activate:
SIMRST
1.8 Volt DC at
MP 69 (TP2401)
No
Yes
SIMVCC on
SIMRST on
Activate:
SIMCLK
1.0 Volt DC at
MP SIM3 (Fixture Sim
reader Pin 3)
Yes
SIMVCC on
SIMRST on
SIMCLK on
Activate:
SIM DATA
1.8 Volt DC at
MP SIM7 (Fixture SIM
reader Pin 7)
1.8 Volt DC at
MP 70 (TP2403)
Connection
Between MP PBA GND
and MP SIM5 (Fixture
Sim reader Pin 5)
Ok
No
No
Yes
No
SL 5 Replace
N2000
SL 4 Scrap
Yes
No
C2410
Short circuit
No
SL 5 Replace
N2000
SL 4 Scrap
Yes
Fault trace SW
Logic
SIM Card control
Activate:
SIM Com Test
Replace combo
reader and
Flash the Phone
with EMMA
SUCR SW
C2406
or C2411
Short circuit
No
SL 5 Replace
C2406 or C2411
SL 4 Scrap
Yes
C2408
Short circuit
No
Sl 5 Replace
C2408
SL 4 Scrap
Yes
No
10 Kohm
Between MP 50
(TP2400) and MP 70
(TP2403)
SL 5 Replace
R2419
SL 4 Scrap
No
Yes
1.8 Volt DC at
MP 50 (TP2400)
No
Replace
X2409
Yes
1.8 Volt DC at
MP SIM2 (Fixture SIM
reader Pin 2)
No
Replace
X2409
Yes
1.0 Volt DC at
MP 65 (TP2402)
No
Yes
Replace
X2409
SL 5 Replace
N2000
SL 4 Scrap
SL 4 Replace
X2409
If still faulty
SL 5 Replace
N2000
SL 4 Scrap
SIM problems
Load ITP SW
into the phone.
Use TRS Fixture
Connect:
Fixture Combo reader to PBA
Insert Memory Card
Connect : VBATT and DCIO/SEPI
Use Fault Trace SW
Memory Stick Test
Passed
Yes
1.8 Volt at
MP 96 (SP2408
MCDATDIR)
Is
X2409
damaged
No
Replace
X2409
Yes
Fault trace SW
Logic
SIM Card control
Activate:
Memory Stick Test
Replace Combo
Reader and
Flash the Phone
with
EMMA
SUCR SW
No
SL 5 Replace
D2410
SL 4 Scrap
Replace
D2460
No
0 Volt DC at
MP 105 (R2406
MSDETECT)
1.8 Volt DC at
MP 94 (R24102
CMDDIR
D2410 Pin 4)
No
1.8 Volt at
MP 95 (R24102
MCCMDDIR
D2410 Pin 3)
Yes
No
Yes
2.8 Volt at
MP 66 (R24105
MC_CLK)
1.8 Volt at
MP 100 (R2496
MCCLK)
No
Yes
1.8 V to 2.8V
at MP 63 (R24106)
to MP 64 (R24110)
Yes
Yes
Replace
X2409
Replace
D2460
From High to
Low pulses Signal
At MP 98 (R2444) to
MP 99 (R2448)
Yes
No
SL 5 Replace
D2000
SL 4 Scrap
Yes
No
Disconnect Combo
reader and restart
the phone, measure
the pulses after
5 sec
Restart the phone
and measure the
pulses after 5 sec
Disconnect Combo
reader and restart
the phone, measure
the pulses after
5 sec
Cut the fence
according to the
repair instructions
for D2460. Restart
the phone and
measure pulses
after 5 sec.
No
Yes
Restart the phone
after each
measurement.
Measure pulses
after 5 sec.
Restart the phone
after each
measurement.
Measure pulses
after 5 sec.
1.8 V to 2.8V
at MP 103 (R2490)
Restart the phone
Measure pulses
after 5 sec.
No
Yes
Restart the phone .
Measure pulses
after 5 sec.
No
1.8 V to 2.8V
at MP 104 (R24101)
Replace
D2460
Yes
SL 5 Replace
N2000
SL 4 Scrap
No
SL 5 Replace
D2000
SL 4 Scrap
START
Memory Stick problems
/ Memory Stick Problems
SEMC Troubleshooting Manual
15
(101)