Trouble-Shooting Guide for video failure.
NOTES: Remember! Your first checking instruments are your senses; see, smell, touch, hear before following the next troubleshooting guides.
Find additional troubleshooting information from the website:
www.hitachiserviceusa.com
.
NOTE: Waveforms were taken with a 480p YPbPr Color Bar signal
.
A
No picture, no color or dark
Are waveforms at
RL69(Y), RL67(PB) and RL66(PR) in
Main-Digital board
OK?
Yes
No
Analog format signal from Tuner,
composite, S-video, component
Digital format signal
HDMI1/2
Replace/Repair
Main-Digital board
Are all analog inputs failing?
Yes
Is there DC level (+2Vdc) in
the checked waveforms of the
RL69, RL67, RL66 resistors?
Yes
Repair/Replace
the Terminal board.
No
B
No
Input 1 or input 2 or Input 3
failing?
No
Yes
Repair/Replace the
Terminal board.
Is Input-Front failing?
No
Yes
Check the Input-Front terminal or the Control board or the
connector from control board to the terminal board. Check
the waveforms at TP01(CV), TP03(Y), TP05(C) which are
next to the PTC connector base in the Terminal Board.
Go to the next page...
Go to the
next page...
Go to the next page...
RL69 (Y)
RL67 (PB)
RL66 (P
R
)
HDMI-FRONT
Are SD
Board and EMH
Flat connector to
Digi-Main
OK?
Yes
No
Repair/Replace SD
board or connector.
Cable/Air
115
IN DE
P
TH TROUBLESHOOTING OF DIGI-MAIN RELATED TO VIDEO PROBLEMS
Summary of Contents for P50H4011
Page 64: ...DW3U 63 FINAL WIRING DIAGRAM TABLE OF CONTENTS ...
Page 76: ...FINAL ASSEMBLY GUIDE TABLE OF CONTENTS 75 DW3U ...
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Page 83: ...FINAL ASSEMBLY GUIDE 82 DW3U ...
Page 84: ...FINAL ASSEMBLY GUIDE 83 DW3U ...
Page 97: ...BACK TO TABLE OF CONTENTS 96 PRINTED CIRCUIT BOARDS DW3 U TERMINAL PWB Component side DW3 U ...
Page 98: ...PRINTED CIRCUIT BOARDS DW3 U TERMINAL PWB Solder side DW3 U 97 ...
Page 99: ...PRINTED CIRCUIT BOARDS DW3 U SD PWB Component side DW3 U 98 ...
Page 100: ...PRINTED CIRCUIT BOARDS DW3 U SD PWB Solder side DW3 U 99 ...
Page 102: ...PRINTED CIRCUIT BOARDS DW3 U FILTER PWB Component side DW3 U 101 Component side ...
Page 103: ...PRINTED CIRCUIT BOARDS DW3 U FILTER PWB Solder side DW3 U 102 Solder side ...
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