Hitachi 32HDT50 Service Manual page 49

A.
Trouble of Main Switching-regulator
Yes
Is Q930(C) voltage
over 3.5V?
No
Is I901 in
Yes
intermittent oscillation?
No
Is I901(4)pin voltage
at the moment of power-ON
below 16V?
No
Is I901(4) regular voltage
below 10V?
No
Check Q934, D936, D938,
I902, D909, etc.
TROUBLESHOOTING FLOWCHARTS
(2 OF 4)
Check Q930, Q931, etc.
Check C910, D938,
T901, I901, I902, etc.
Yes
Check D903, D906, etc.
Yes
Check D905, C912, etc.
49
PT3-E/G AVC3-U