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Repair Flow Chart (Continued)
V20 107E5
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 1802&1803 pressed on, then power on
(1106) with IFcable pin5
-factory mode
5.After 1802&1803 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=pin10=hi
Scl=pin11=hi
10,11. IIC bus
check key
Enter,Up,Down,Left,Right keys
21,29 Keypad
check
output from 0V to 5V
4. Rotation
check 3811, 2812
3825~3820
12, VCLK
EEPROM
check 7802 pin 7
Low
: write enable
Hi
: write disable
check
7802 M24C16
7501 TDA9112a
7301 TDAlm1237
check
output from 0V to 5V
30. ABL-CON
28. H-linearity
check
output from 0V to 5V
check
6802,6803
50
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Содержание 107E51/87
Страница 17: ...9 Go to cover page 17 V20 107E5 Wiring Diagram 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 ...
Страница 31: ...Block Diagram 31 9 Go to cover page V20 107E5 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 ...
Страница 35: ...Main Panel C B A B 35 9 Go to cover page V20 107E5 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 ...