Trouble Shooting Table - Sharp LC-R60HDU Service Manual

START
Are AC cord and signal
cables correctly connected?
YES
Turn on power.
Does power LED light up
properly?
YES
Does the lamp stay on?
YES
Does OSD function with
remote controller and key-in?
YES
YES
Does selected video fail to
appear? Are images distorted?
NO
Is selected audio not heard?
Is sound unstable?
YES
Go to "Checking audio circuit".
Is component 1125I as
specified?
YES
Is component 525P as
specified?
YES
Is component 525I as
specified?
YES
Is Video / S input as
specified?
A

TROUBLE SHOOTING TABLE

NO
Check connections.
Reconnect as required.
NO
Go to "Checking power supply".
NO
Go to "Checking lamp compartment".
NO
Go to "Checking OSD".
NO
END
NO
NO
Are there output signals at pins
(1), (3), (5), (7) and (9) of UB?
YES
NO
Are there output signals at pins
(11), (13) and (15) of UA as
well as pins (7) and (9) of UB?
NO
YES
Are there output signals at
pins (13) and (15) of UB?
YES
YES
Are there output signals at pins
(1), (3), (5), (7) and (9) of UA?
NO
Replace up converter.
NO
Are there output signals at pins
(1), (3), (5), (7) and (9) of LA?
NO
NO
NO
Go to "Checking main
signal input circuit".
37
LC-R60HDU
A
YES
Go to "Checking
LCD drive PWB".