Hitachi UltraVision L42S601, Service Manual

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40
DW3G
TROUBLESHOOTING FLOW CHARTS
Power Supply troubleshooting
(
＊
) Power-On control signal for Power Supply Unit
(1) Power connected : ON
Æ
PSU outputs STBY+5V.
(2) PoWER_1 (CN101 [6]) : High
Æ
PSU o5.6V.
(3) PoWER_2 (CN101 [7]) : High
Æ
PSU 10V,16.5V, audio 13V and 24V.
If any control signal does not rise, PSU cannot output the voltage.
・
PoWER_1/2 : not rise ----- Main-Digital PWB trouble
Video Power Save Mode
(Input:1
～
3, Front)
Yes
No
No Power
(No picture, and No sound)
Check Power Supply Unit. (
＊
and Fuse
or AC-Inlet / Connector)
Is Power Indicator
orange lighted?
Is Power Indicator
not lighted?
Does Power Supply Unit
5.6V?
Yes
Check Main-Digital board.
No
No
Yes
Power Indicator
blue is lighted normally.
Check Power Supply Unit. (
＊
)
Does Power Supply Unit output
+10V/16.5V/13V/24V?
No
Yes
Check Main-Digital board
or Terminal PWB