Philips V40 109B6 - Page 81

Repair Flow Chart
109B6 CRT
81
22. Degauss
Check
active=hi
no active=low
5.reset
Check
5v
37.Brightness
check
pwmfrom0Vto 5V
check
pwmfrom0Vto 5V
38. Rotation
23. Keypad
check keys,Enter
Left(bri.),Right(con.),Exit keys
24. Selftest
check pin 24
1.no H/V sync &IFcable pin5 floating - show msg.
2.H/V sync exist &IFcable pin5toground-normal
3.H/V sync non-exist &IFcable pin5tognd-power saving
4.Press both left & right keys with IF cable pin5toground-factorymode
5. Press both left & right keys with IF cable pin5 floating -burn in m
ode
25, 26. DDC bus
check
sda=pin 25=hi
scl=pin 26=hi
31, 32. IIC bus
check
sda=pin 31=hi
scl=pin 32=hi
check
7801 WT6ZPZ
7501 TDA4841
7304 NT 68273
7301 TDA4886A
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