Philips DELLP1230 Service Manual page 83

22. Degauss
5, Reset
37. Brightness
4. Rotation
23. Keypad
24.Selftest
25,26. DDC bus
31,32 IIC bus
30. EEPROM
write protection
Repair Flow Chart
check
active=hi
no active=low
check
from 5V to 0V
check duty cycle of
pwm from 0% to 100%
check duty cycle of
pwm from 0% to 100%
check keys Enter,
up,down,left,right
check pin24
1.no H/V sync & first power ON
2.H/V sync exist
3.H/V sync non-exist & after power ON
4.Left+Right Keys pressed with IFcable
5.left +Right Keys pressed without IF cable
check idle status
sda=pin25=hi
scl=pin26=hi
check idle status
sda=pin32=hi
scl=pin31=hi
check 7336
pin7
Write : low
Dell P1230 M25P
9
check
2304/3307
check 1891~1895
3891~3895
- show msg.
- normal
- power saving
- factory mode
- burn in mode
check
7336 M24C16
7421 TDA4856
7781 WT6803
7701 TDA4887
83
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