Philips V30 - Manual (Page 78)

Repair Flow Chart (Continued)
9
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107T5
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 1892&1893 pressed on, then power on
(1895) with IFcable pin5 =L -factory mode
5.After 1892&1893 pressed on, then power on
(1895) without IFcable pin5=H -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 Power, Ok, LF,
Brightness and contrast keys
23. Keypad
check
output from 0V to 5V
4. Rotation
check 3891~3894
EEPROM
check 7802 pin 7
Low
: write enable
Hi : write disable
check
7802 M24C16
7501 TDA9112A
7331 NT6812K
check
output from 0V to 5V
29. ABL
30. H-linearity
check
output from 0V to 5V
78