Troubleshooting Diagram Of The Lcd Check - Nokia 9000i Service Manual

RAE/RAK–1N
Faultfinding/Disassembly
3

Troubleshooting Diagram of the LCD Check

The following diagram is to differentiate between an LCD module or a
PDA fault. An LCD module fault is beyond the scope of this document
and requires that a replacement module be fitted.
3.1.1
CPU fault
NO
3.1
NO
LCDPWM
OK?
YES
3.1.2 Check
PDA PWR
Page 8 – 24
0.
Start
1.
NO
LCD ON?
YES
2.
Change LCD contrast.
3.
Contrast change
OK?
YES
4.
Check LCD test–
patterns.
5.
NO
Test–patterns
OK?
YES
LCD OK!
Technical Documentation
1.1
Disconnect UI
flex
1.2
NO
LCDVCC
OK?
YES
1.2.2
CPU fault
1.3
NO
LCDVEE
OK?
YES
1.4
YES
UI flex OK?
NO
1.4.1 UI flex
fault
After Sales
1.2.1
LCDVCCON YES
active?
NO
NO
1.3.1
LCDVEEON YES
active?
1.3.2 Check
PDA PWR
1.5.2
CPU fault
NO
1.5
PCLK,LP,FP,
DISPON
OK?
YES
1.5.1 LCD
module fault
Original, 05/97