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Check ST_Voltage
Check IIC bus
lime (SDA, SAC)
Check/ Replace F1771
Is the voltage at VCC of IC001
ST_1.8V and ST_3.3V?
Check/
Replace IC500
Check the voltage at
P803B 5.6V
Check the output
IC830, IC840, IC843
Check +B voltage
125 ~ 135V or
OPEN
Check/ Replace D1810
0V
Check/ Replace IC810
0V
OK
NO
NO
NO
YES
OK
YES
YES
0V
Check/ Replace
Q422, T402
Is the waveform at
Drain Q408 normal?
5. No raster
Check F1701 Fuse
on PSW Board
Does the square
waveform from PIN
23 of IC500 appear
Check the voltage at
pin2 of IC801
Check the voltage of
C1806