Sony Ericsson K800 Electrical Repair Manual page 60

Test the joystick Switch S2504 and the diodes V2503,
V2506, V2507, V2508 and V2509.
Place the phone as picture Joystick up, system connector at right.
Remove the keyboard.
MP 22
Connect the black probe onto or pin 7 (frame) at joystick.
Connect red probe onto MP 1 to MP 82.
Joystick
10 4 82
1.8-OL 1.8-OL 1.8-OL
No action
1.8-OL 0.0-0.6 0.6
A Right
1.8-OL 0.0-0.6 0.6
B Down
0.6 0.0-0.6 1.8-OL
C Left
0.6 0.0-0.6 1.8-OL
D Up
1.8-OL 0.0-0.6 1.8-OL
Center push
V2509 V2503 V2508
Go to Test the joystick Switch S2504 if the measurements are not equal to the reference sheet
Go to Test the diode V2500 if the measurements are equal to the reference sheet
TROUBLESHOOTER
47 1 MP
1.8-OL 1.8-OL Volt
0.6 1.8-OL Volt
1.8-OL 0.6 Volt
1.8-OL 0.6 Volt
0.6 1.8-OL Volt
1.8-OL 1.8-OL Volt
V2506 V2507 Diode
Test the Joystick Switch S2504 and Diodes V2503, V2506-09
Test the joystick Switch S2504
Connect the black probe onto pin 7 (frame) at joystick.
Connect the Red probe onto pin 1-6 at joystick.
If the measurement are equal to the reference sheet,
the joystick is working properly.
Joystick
4 6
1.8-OL 1.8-OL
No action
1.8-OL 0.0
A Right
1.8-OL 0.0
B Down
0.0 0.0
C Left
0.0 0.0
D Up
1.8-OL 0.0
Center push
Repair action if both joystick and diode test and joystick test is failed then replace the joystick switch
S2504.
Repair action if joystick and diode test is failed and joystick test is passed.
SL5: compare the column in the sheet and replace the diode.
SL4: scrap the phone.
SEMC Electrical Repair Manual
2 1 3 Pin
1.8-OL 1.8-OL 1.8-OL Volt
0.0 0.0 1.8-OL Volt
0.0 1.8-OL 0.0 Volt
1.8-OL 1.8-OL 0.0 Volt
1.8-OL 0.0 1.8-OL Volt
1.8-OL 1.8-OL 1.8-OL Volt
1202-3085 rev. 2
K800 - K810
60 (121)