Hitachi 42HDT51M Service Manual page 50

11. TROUBLESHOOTING FLOWCHARTS
Protection circuit Operation
B
Is D946 ( K ) voltage
below 2.9V?
No
Is D952 ( A ) voltage
below 3.2V?
No
Is D955 ( A ) voltage
below 3.2V?
No
Is D949 ( K ) voltage
above 6.7V?
No
Is D950 ( K ) voltage
above 6.0V?
No
Is D948 ( K ) voltage
above 9.9V?
No
Is DP12 ( K ) voltage
above 9.9V?
No
Is DP11 ( K ) voltage
above 6.7V?
No
Is DP03 ( K ) voltage
above 0V?
No
Check D940 etc.
Yes Check D933, D302,
U301, U302, etc.
Yes Check D932, IP01, I5P1,
I403, I404, etc.
Check D931, I931, I933,
Yes
IP05, etc.
Or check IJ12, etc(HDMI PWB)
Yes
Check I933, etc.
Yes
Check I933, etc.
Yes
Check I931, D947, etc.
Yes
Check IP05, DP15, etc.
Yes
Check IP01, DP08, etc.
Yes
Check DP01, etc.
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PT5-G/PW1-H