SEMC Troubleshooting Manual
TROUBLESHOOTING
Display Problems - Display Illumination Problems
K630 - V640 - K660
Display Illumination problems
Display problems
No
Display Backlights
Ok
Replace
X4200
2.7 Volt DC
at
MP 6 (ST4201
VDIG)
Yes
No
Yes
Yes
SL 5 Replace
N2000
SL 4 Escalate
Fault trace SW
MMI
Display pattern
Init Screen Testing
Activate:
RGB Color Pattern
SL 5 Replace
D2000
SL 4 Escalate
Claim Component
X4200
1.8 Volt DC
at
MP 8 (ST4200
VDDE18)
Display
Ok
No
Yes
No
START
Step 1:
Use TRS Fixture and connect Display and
Keypad. If Display working properly at the
fixture then replace Display
If not then continue with the
Step 2:
Load ITP SW into the phone
Use TRS Fixture and connect Display
Connect: VBATT and DCIO/SEPI
Continue with the
Display problems TRS guide
Go to
Display illumination
problems
START
Step 1:
Use TRS Fixture and connect Display and
Keypad. If Display working properly at the
fixture then replace Display
If not then continue with
Step 2:
Load ITP SW into the phone
Use TRS Fixture and connect Display
Connect: VBATT and DCIO/SEPI
Continue with the
Display illumination problems TRS guide
Fault trace SW
MMI
Misc
Activate:
Display Backlight
Display Backlights
Ok
No
Yes
Flash the phone with
EMMA
SUCR SW
Fault trace SW
MMI
Misc
Deactivate:
Display Backlight
3.8 Volt DC at
MP 95 (TP4200)
3.8 Volt DC at
MP 19 (V4201
Anode)
No
SL 5 Replace
L4201
SL 4 Escalate
No
Replace
V4201
Yes
Yes
Fault trace SW
MMI
Misc
Activate:
Display Backlight
No
15V Pk-Pk
Pulses at MP 95 (TP4200)
short after Display
Backlight
Is set
Yes
4.3V
Pk-Pk Pulses
(
±
0.5V) at MP 21 (L4200)
short after Display
Backlight
Is set
SL 5 Replace
V4200
SL 4 Escalate
Yes
0 Volt DC at
MP 94 (TP4201) when
Display Backlight Is
On
SL 5 Replace
N2000
SL 4 Escalate
No
Replace
X4200 or Display
Yes
SL 5 Replace
V4206 or N2000
SL 4 Escalate
No
1215-3608 rev. 1
11
(96)
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