Hitachi 42HDT51M Service Manual page 51

11. PDP TROUBLESHOOTING FLOWCHARTS
C
42HDT51 55HDT51
Is the power indicator
LED always dark?
Is the power indicator
LED color red even though
itís powered ON?
No(green or orange)
Is it the power
saving mode?
No
Presume the wrong PWB
by Self-Diagnosis function
Is the power indicator
LED always dark?
Is the power indicator
LED color red even though
itís powered ON by remote controller
or AVC front switch with cable
connection to AVC?
Presume the wrong PWB
by Self-Diagnosis function
Is the input voltage
Yes
applied to Power supply unit?
(CN61
No
Are the voltages
Applied to CN63
and CNPPS
of power supply unit?
Yes
Trouble of Formatter Unit
Yes
applied to CN63
Trouble of
Input signal cable
of Formatter Unit.
Trouble of
Yes
Power Supply Unit
No
Check SIGNAL/AUDIO PWB
Yes
I001, Q005, Q006, etc.
No
Check FILTER
No
PWB: F951,
AC Inlet
Power switch.
, pins)
etc.
Yes
No
Trouble of
pins
,
Power
, pins
, , ,
Supply Unit
Yes
Is Voltage
Yes
Trouble of
pin of
Formatter
the power supply unit?
Unit.
No
Trouble of
Power Supply Unit
51
PT5-G/PW1-H