43
107S2 CM23 GSIII
Repair Flow Chart
34. Selftest
check pin34
1.no H/V sync & IF cable pin5 floating
- show msg.
2.H/V sync exist & IF cable pin5 to ground
- normal
3.H/V sync non-exist & IF cable pin5 to gnd -power saving
4.connect a 15k resistor with IFcable pin5
-factory mode
5.connect a 5k1 resistor with IF cable pin5
- burn in mode
check idle status
sda=pin36=hi
scl=pin37=hi
36,37. DDC bus
check idle status
sda=pin38=hi
scl=pin39=hi
38,39. IIC bus
check key
Enter,Up,Down,Left,Right keys
33. Keypad
check
output from 0V to 5V
29. Rotation
check 3836, 2821
3891~3895
40, VCLK
EEPROM
check 7803 pin 7
Low : write enable
Hi
: write disable
check
7803 24LC16
7501 TDA4841
7304 MTV018-27
7301 TDA4886
check
output from 0V to 5V
28. H-DC-SHIFT
30. ABL-CON
42. H-linearity
check
output from 0V to 5V
check
output from 0V to 5V
check
7804 24LC21
http://jdwxzlw.5d6d.com/?fromuser=华盛维修
家电维修资料网,免费下载各种维修资料