Troubleshooting Flowcharts - Hitachi 42HDT51M Service Manual

11. TROUBLESHOOTING FLOWCHARTS

31. TROUBLE SHOOTING
Monitor/AVC both LED
Lighting Green
(PDP MONITOR)
Burn-in mode check (*1)
NG?
Check AVC POWER PWB
Is AVC Power Indicator
always red and no sound
of Relay heard?
Has F901
blown?
Has F902
blown?
Is R913
open?
Is D940(G) voltage
over 1.0V?
A
No picture
No sound
Check the power LED
Indicated color.
Only AVC or Monitor
one side lighting.
Which LED does
not light?
AVC
Yes
Note (*1)
Disconnect the MONITOR connection cables (DVI/DIN)
No
and press Sub-Power button for more than 5 seconds.
Yes
No
Caution!
It should be always confirmed that C909(CE680uF/250V)
is discharged when touching POWER P.W.B. with fingers
or soldering iron after power-off in order to prevent
the electric shock and second damage.
Check D901, D907,
Yes
C901_C905, C909etc.
No
Check I901, T901,
Yes
C911, etc.
No
Yes
Check H901, C922, etc.
No
Yes
B
No
Trouble of Main Switching-regulator
Monitor/AVC both LED
Lighting Red
Disconnect the MONITOR connection cables
When power ON is
carried out with an AVC single
article does a power LED
Monitor
become green?
C
(Trouble of PDP MONITOR)
C
Check AVC AV PWB
I001, Q0L1, Q930,etc.
Protection circuit Operation
48
PT5-G/PW1-H
No
C