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22. Degauss
5. Reset
37. Brightness
38. Rotation
23. Keypad
24. Selftest
25, 26. DDC bus
31, 32. IIC bus
Back
Repair Flow Chart (Continued)
check
active=hi
no active=low
check
5V
check
pwm from 0V to 5V
check
pwm from 0V to 5V
check key
Enter,+,-,bri,con keys
check pin 24
1.no H/V sync & IF cable pin5 floating
2.H/V sync exist & IF cable pin5 to ground
3.H/V sync non-exist & IF cable pin5 to gnd
4.connect a 15k resistor with IF cable pin5
5.connect a 5k1 resistor with IF cable pin5
check idle status
sda=pin 25=hi
scl=pin 26=hi
check idle status
sda=pin 31=hi
scl=pin 32=hi
- show msg.
- normal
- power saving
- factory mode
- burn in mode
check
7804
M24C16-BN6
7503
TDA4841
7304
MTV018-27
7301
TDA4886
107P2 CM 25 GSIII
73
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