SEMC Troubleshooting Manual
TROUBLESHOOTING
Key Problems - LED Problems
K630 - V640 - K660
Key problems
Yes
Problem with
Phone On
DMM Settings:
Diode
Measurement
Connect
the black probe
To PBA GND
more than 1.7 Volt DC at
MP 46 (V2409
Cathode)
Press the On/Off
Key S2400
Yes
0 Volt DC at MP 46
(V2409_Cathode)
Replace
S2400
No
SL 5 Replace
L2406, V2409
or N2000
SL 4 Escalate
Yes
Remove
S2400
No
More than
1.7 Volt DC at MP 46
(V2409_Cathode)
No
Replace
S2400
Yes
Problem with
Phone Off
SL 5 Replace
V2402
SL 4 Escalate
No
Yes
Problem with
Volume Down
key
No
More than
2.0 Volt DC between
MP 83 (S2402 A) and
MP 82 (S2402
C)
Yes
Press the
Volume Down key
S2402
Yes
0 Volt
DC between
MP 83 (S2402 A) and
MP 82 (S2402
C)
SL 5 Replace
D2000
SL 4 Escalate
Yes
Replace
S2402
No
Short
Circuit between
MP 83 (S2402 A)
MP 92 (PBA GND) and
MP 82 (S2402 C)
MP 92 (PBA
GND)
No
Remove
S2402
Replace
V3107 or V3108
Yes
No
More than
2.0 Volt DC between
MP 83 (S2402 A) and
MP 82 (S2402
C)
No
Yes
Problem with
Volume Up
key
No
More than
2.0 Volt DC between
MP 80 (S2403 A) and
MP 79 (S2403
C)
Yes
Short
Circuit between
MP 80 (S2403 A)
MP 92 (PBA GND) and
MP 79 (S2403 C)
MP 92 (PBA
GND)
No
Replace
V3109 or V3110
Yes
Remove
S2403
More than
2.0 Volt DC between
MP 80 (S2403 A) and
MP 79 (S2403
C)
No
SL 5 Replace
D2000
SL 4 Escalate
No
Replace
S2403
Yes
Press the
Volume Up key
S2403
Yes
0 Volt DC
between
MP 80 (S2403 A) and
MP 79 (S2403
C)
Problem
With all other
keys
No
Replace
X2402
Yes
Problem
solved
SL 5 Replace
D2000
SL 4 Escalate
Yes
No
No
Claim Component
X2402
Yes
Replace
S2402
SL 5 Replace
D2000
SL 4 Escalate
START
Step 1:
Use TRS Fixture and connect Display and
Keypad. Connect: VBATT
Perform Keyboard Test in Service Tests
If All Keys working properly at the
TRS Fixture then replace Keypad. If not then
disconnect VBATT and continue with the
Key problems TRS guide
Flash the Phone with
EMMA
SUCR SW
No
START
Load ITP SW into the phone.
Use TRS Fixture and connect
Keypad and Display
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW
MMI
Activate:
Display Backlight
Upper Keypad LED, Lower Keypad LED
Web Navigator LED
If all Keypad LED working properly at the
TRS Fixture then replace Keypad
If not then continue with the
LED problems TRS guide.
Problem
with all
Keypad LED
Yes
Replace
X2402
No
Display
Backlight
Ok
Go to
Display illumination
problems
No
Yes
0 Volt DC at
MP 78 (TP2003)
Yes
SL 5 Replace
N2000
SL 4 Escalate
No
Problem with
Lower Keypad LED
0 Volt DC at
MP 77 (TP2004)
Yes
Replace
X2402
Yes
0 Volt DC at
MP 18 (V4205_Pin 1)
No
SL 5 Replace
N2000
SL 4 Escalate
No
SL 5 Replace
V4205
SL 4 Escalate
Yes
Problem with
Upper Keypad LED
No
0 Volt DC at
MP 78 (TP2003)
Yes
Replace
X2402
Yes
0 Volt DC at
MP 20 (V4205_Pin 4)
No
SL 5 Replace
N2000
SL 4 Escalate
No
SL 5 Replace
V4205
SL 4 Escalate
Yes
Problem with
Web Navigator LED
0 Volt DC at
MP 71 (TP2005)
Yes
Replace
X2402
Yes
0 Volt DC at
MP 16 (V4206_Pin 1)
No
SL 5 Replace
N2000
SL 4 Escalate
No
SL 5 Replace
V4205
SL 4 Escalate
Yes
Flash with
EMMA SUCR SW
No
No
K660
No
Yes
LED problems
1215-3608 rev. 1
12
(96)
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