Repair Flow Chart (Continued)
V40 107P5
Pin24. 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
Pin25,26. DDC bus
check idle status
sda=pin32=hi
scl=pin31=hi
Pin31,32. IIC bus
check key Power, Ok, LF,
Pin23. Keypad
check
output from 0V to 5V
Pin38 Rotation
check 3836
3891~3894
PIN30, VCLK
EEPROM
check 7803 pin 7
Low
: write enable
Hi
: write disable
check
7803
M24C16
7501
TDA4841A
7304
NT60875K
7301
TDA4886A
7302
TDA4823
check
output from 0V to 5V
pin3 ABL-CON
PIN4. H-linearity
check
output from 0V to 5V
36
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