Repair Flow Chart (Continued)
9
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M32 107T4 GS_3
24. Selftest
check pin24
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.After 1871&1872 pressed on, then power on
(1106) with IFcable pin5
-factory mode
5.After 1871&1872 pressed on, then power on
(1106) without IFcable pin5
-burn in mode
check idle status
sda=pin25=hi
scl=pin26=hi
25,26. DDC bus
check idle status
sda=pin32=hi
scl=pin31=hi
31,32. IIC bus
check key
Enter,Up,Down,Left,Right keys
23. Keypad
check
output from 0V to 5V
38. Rotation
check 3836, 2822
3871~3875
30, VCLK
EEPROM
check 7803 pin 7
Low
: write enable
Hi
: write disable
check
7803
M24C16
7501
TDA4841
7304
MTV018-27
7301
TDA4886A
check
output from 0V to 5V
3. ABL-CON
4. H-linearity
check
output from 0V to 5V
check
7804
7804 has been reserved
for hardware DDC
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