Sharp XG-C40XE (serv.man5) Service Manual ▷ View online
40
XG-C40XU/XE
Lamp fails to light-up
Yes
Yes
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Turn on the power switch. Is
discharging sound heard from
the lamp?
Is the ballast cooling fan
running?
Is DC 360V voltage applied
between PL connector pins?
Is 2V or higher voltage applied
between pins (1) and (2) of
ballast's D connector?
Is D connector disconnected?
Check the power circuit.
Is the lamp out of socket?
Reconnect the
lamp into socket.
Replace the
lamp.
Reconnect the
connector into socket.
Check the
microcomputer circuit.
Replace the ballast.
TROUBLE SHOOTING TABLE
(Continued)
41
XG-C40XU/XE
Yes
Yes
No
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
No
No
No
No
No
End
Does the remote controller
malfunction?
malfunction?
Does the onscreen display
malfunction?
malfunction?
Are the image colors abnormal?
Is the image distorted?
Is the image invisible?
Is the voltage at connector P8502 as
specified?
specified?
Turn up the contrast control all the
way. Is the image visible?
way. Is the image visible?
Are the PC, video and projector
cables as specified and properly
connected?
cables as specified and properly
connected?
Is the input properly selected?
Power On
Select the specified input with the
remote controller.
remote controller.
Use the specified cables. Reconnect
them correctly.
them correctly.
Readjust the video settings.
Power circuit defective.
Go to “Checking the Clock Circuit
and its Peripheral Circuits”.
and its Peripheral Circuits”.
Go to “Checking the Sync Signal
Circuit and its Peripheral Circuits”.
Circuit and its Peripheral Circuits”.
Go to “Checking the Video Circuit
and its Peripheral Circuits”.
and its Peripheral Circuits”.
Go to “Checking the OSD Circuit and
its Peripheral Circuits”.
its Peripheral Circuits”.
Go to “Checking the Remote
Controller”.
Controller”.
4
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-1
42
XG-C40XU/XE
Checking the Sync Signal Circuit and its Peripheral Circuits
Are there signals at pins (13) thru
(52), except for GND, of P8405?
(52), except for GND, of P8405?
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
Is the sync signal of split type?
Are there signals at TP8004 and
TP8005?
TP8005?
Is the sync signal of Sync On Green
type?
type?
Are there signals at pin (7) of IC8611?
Are there signals at pins (149) (TL80
34) and (150) (TL8035) of IC8020?
34) and (150) (TL8035) of IC8020?
Does the input have a resolution lower
than XGA or is it video input?
than XGA or is it video input?
Are there signals at pins (26) (TL8043),
(28) (TL8041) and (29) (TL8042) of
IC8020?
(28) (TL8041) and (29) (TL8042) of
IC8020?
IC8610 or terminal PWB defective.
IC8025 or its peripheral part faulty.
IC8611 or its peripheral part faulty.
IC8020 or its peripheral part faulty.
IC8029,IC8609 or its peripheral
part faulty.
part faulty.
5
6
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-3
Checking the clock circuit and its peripheral circuits
Yes
No
Is X8001 (6MHz) oscillating?
X8001 or its peripheral part faulty.
Yes
Yes
Yes
No
No
No
Is X8003 (1.84MHz) oscillating?
Is X8004 (22.165MHz) oscillating?
Is X8005 (18.75MHz) oscillating?
X8005 or its peripheral part faulty.
X8004 or its peripheral part faulty.
X8003 or its peripheral part faulty.
Yes
No
IC8001 or its peripheral circuit faulty.
Does pin (162) of IC8001 function?
5
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-2
43
XG-C40XU/XE
Checking the PLL circuit and its peripheral circuits
Yes
No
Yes
No
Yes
Yes
No
No
No
Yes
4
6
Are there signal at pins (111) and
(112) of IC8606?
(112) of IC8606?
Are there signals at pins (7) and
(10) of IC8601?
(10) of IC8601?
Check the video circuit and its
peripheral circuits.
peripheral circuits.
Is image as specified at resolution
above XGA level?
above XGA level?
Is image as specified at resolution
below XGA level?
below XGA level?
Hook up a video system. Is the
display as specified?
display as specified?
IC8025,IC8600 or its peripheral
circuit faulty.
circuit faulty.
IC8601,IC8606 or its peripheral
circuit faulty.
circuit faulty.
Check the S-XGA video circuit and
its peripheral circuits.
its peripheral circuits.
Check the VGA video circuit and its
peripheral circuits.
peripheral circuits.
Check the video system's video
circuit and its peripheral circuits.
circuit and its peripheral circuits.
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-4
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