5. No raster
OK
Check +B voltage 125 ~ 135V or
0V
Is the voltage at VCC of IC001 ST_1.8V and ST_3.3V?
NO
Check F1701 Fuse OPEN |
on PSW Board |
NO
Check/ Replace IC500
NO
Check/ Replace Q422, T402
YES
Does the square waveform from PIN 23 of IC500 appear
YES
Is the waveform at Drain Q408 normal?
Check ST_Voltage
YES
Check IIC bus lime (SDA, SAC)
OK |
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| Check/ Replace F1771 |
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| 0V |
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Check the voltage of |
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C1806 |
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| Check/ Replace D1810 |
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| 0V |
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Check the voltage at |
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pin2 of IC801 |
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| Check/ Replace IC810 |
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Check the voltage at |
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P803B 5.6V |
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Check the output IC830, IC840, IC843
- 19 -
