Display Problems - Sony Ericsson C702 Troubleshooting Manual

Dead Phone Problems part 3
START
Dead Phone Problems part 3
NOTE !
Before following this guide
the Dead Phone Problems
part 2 must be finished.
VCORE12
1.2 Volt DC at
Voltage No
MP 40 (V2206)
Ok
Yes
Is
MP 45 (ST2213)
short circuit to
Shield Can
Fence
No
Yes
SL 5 Replace
L2200
SL 4 Escalate
SL 5 Replace
D2000
SL 4 Escalate
Yes
VCORE18
D2000
Voltage No
getting hot
Ok
No
Yes
Is
Step 1:
any of
Disconnect
C2239 or
VBATT and DCIO/SEPI
C2342 to C2347
short circuit
Step 2:
Connect: Display and Keypad
to the PBA
Yes
Step 3:
Connect Only: VBATT
SL 5 Replace
Step 4:
Faulty Component
Activate EMMA SW
SL 4 Escalate
Press the "C" key and
connect USB Cable from PC
Flash the Phone with ITP SW
ITP SW Flash
Successful
TROUBLESHOOTING
SL 5 Replace
3.8 Volt DC at
No No C2226 and L2201
MP 44 (L2201)
SL 4 Escalate
SL 5 Replace
Yes V2206 or N2000
SL 4 Escalate
SL 5 Replace
D2000
Yes Yes D2000
getting hot
SL 4 Escalate
No
Check if following
components are
short circuit:
C2220, C2219, C2222, C2221
C2243, C2244, C2301 to C2308
C2412, C2311, C2419
C2313 to C2319
C2417, C2418, C2322, C2324
Are SL 5 Replace
all Components Yes N2000
Ok SL 4 Escalate
SL 5 Replace
No Faulty Component
SL 4 Escalate
3.8 Volt DC SL 5 Replace
No at MP 8 (N2202_Pin 1) No C2238 and N2202
and MP 9 (ST2216) SL 4 Escalate
SL 5 Replace
Yes N2202
SL 4 Escalate
SL 5 Replace
Yes D2020
SL 4 Escalate
Go to
No
Flash Problems
Dead Phone Problems - Display Problems
Go to
Display illumination No Display Backlights
Problems Ok
Yes
Turn off the phone
Disconnect: Display and Keypad
Restart the phone
Use Fault trace SW
MMI
Display pattern
Init Screen Testing
Activate: TV Test Pattern
Yes
1.8 Volt DC at 1.8 Volt DC at
MP Z4202_Pins No MP Z4202_Pins
5,6,7,8 1,2,3,4
No
Yes
More than More than
1.8V Pk-Pk Pulses 1.8V Pk-Pk Pulses
No
at MP Z4200_Pins 5,6,7,8 at MP Z4200_Pins 1,2,3,4
short after TV Test was short after TV Test was
activated activated
No
Yes
More than More than
1.8V Pk-Pk Pulses 1.8V Pk-Pk Pulses
at MP Z4201_Pins 5,6,7,8 No at MP Z4201_Pins 1,2,3,4
short after TV Test was short after TV Test was
activated activated
Yes
No
Replace
X4202
SEMC Troubleshooting Manual

Display Problems

START
Step 1:
Use TRS Fixture
Connect: Display, Keypad and VBATT
Fault trace SW
Start the Phone!
MMI
If the Display is working properly on the
Display pattern
TRS Fixture then replace Display
Init Screen Testing
If not then continue with step 2.
Activate:
Step 2:
RGB Color Pattern
Load ITP SW into the phone
Connect: DCIO/SEPI
Continue with
Display Problems TRS guide
2.6 Volt DC
SL 5 Replace
at MP 4 (ST4201) and
No
1.8 Volt DC at
SL 4 Escalate
MP 3 (ST4202)
Yes
1.8 Volt DC
SL 5 Replace
at MP 2 (ST4205) and
No
0 Volt DC at
SL 4 Escalate
MP 1 (C4228)
0 Ohm
Between
SL 5 Replace
MP Z4202_Pins
Yes Yes
5,6,7,8 and Shield
SL 4 Escalate
Can Fence
SL 5 Replace
D2000 No
SL 4 Escalate
0 Ohm
Between SL 5 Replace
Yes MP Z4200_Pins Yes
5,6,7,8 and Shield SL 4 Escalate
Can Fence
SL 5 Replace
D2000 No
SL 4 Escalate
0 Ohm
Between SL 5 Replace
Yes MP Z4201_Pins Yes
5,6,7,8 and Shield SL 4 Escalate
Can Fence
SL 5 Replace
D2000 No
SL 4 Escalate
1221-7857 rev. 1
C702
N2000
D2000
Z4202
Z4200
Z4201
10 (115)