ower.
Is F901/F902 normal?
NO
LINE_FILTER_UNIT:
Isn't
C908,RV902,L901,C909,C901,C902,C904,L092,FB922,FB923,
RV904 etc. out of order? Moreover, whether the short-circuit with
the circumference circuit is checked.
POWER_UNIT:
BD901, C935, L903, etc. out of order?
Moreover, whether the short-circuit with the circumference circuit
is checked.
Is BD901 (+320V) output? (Set the main power SW to OFF.)
* When power on/off switch is on ‧‧‧ About +400V
Does the PFC circuit operate normally?
(IC909,Q922,D933,IC901,Q917,Q923 and etc. And, the circuit
around the protection circuit etc. is checked.)
NO
Is a voltage of +5V applied to pin (12,13) of connector (CN902)?
(Set the main power SW to OFF.)
Does the switching circuit operate normally?
Check circuit around the primary side (T904, IC903, Q924,
ZD910, ZD911, ZD912, ZD913, etc.), the secondary side (D927,
L907, etc.), the AC_DET circuit (IC911, IC913, etc.), and the
protection circuit.
NO
Are +24V output as for the power on/off switch when it is on?
NO
Does the inverter circuit operate normally?
Check circuit around the primary side
(T905,Q919,Q920,IC902,D936,D937, etc.), the secondary side
(D901, D902,C951,C952,L906,L908,IC914, etc.), the STANDBY
circuit (Q915, etc.), and the protection circuit.
Similarly, is +12V output as for the power on/off switch when it is
on?
NO
Check +12V circuit of D928, L909, etc.
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