Sharp XG-C40XE (serv.man5) Service Manual ▷ View online
44
XG-C40XU/XE
Yes
Yes
No
No
Checking the S-
XGA's red video
circuit and its
peripheral circuits
XGA's red video
circuit and its
peripheral circuits
Checking the VGA's
red video circuit and
its peripheral
circuits
red video circuit and
its peripheral
circuits
Is there signal at pin (139) of IC8606?
Terminal PWB,C8616 defective.
Is there signal at pin (139) of IC8606?
Is there signal at pin (144) of IC8606?
Is there signal at pin (Y11)(TL8612) of
IC8609?
IC8609?
1
1
Yes
Yes
Yes
Yes
No
No
No
Yes
No
Check the video
system's red video
circuit and its
peripheral circuits
system's red video
circuit and its
peripheral circuits
Yes
Yes
No
No
Yes
No
No
Are there signals at pins (21) thru (31)
as well as (34) thru (41), except for
GND, of P8606?
as well as (34) thru (41), except for
GND, of P8606?
Are there signals at TL8044 and
TL8046?
TL8046?
Are there signals at pins (1) thru
(10) of IC8051?
(10) of IC8051?
IC8051 or its peripheral circuit or output
PWB faulty.
PWB faulty.
IC8025 or its peripheral circuit faulty.
IC8606 or its peripheral circuit faulty.
IC8020 or its peripheral circuit faulty.
IC8029 or its peripheral circuit faulty.
IC8609 or its peripheral circuit faulty.
C8702 or its peripheral circuit or signal
PWB faulty.
PWB faulty.
Are there signals at pins (21) thru (31)
as well as (34) thru (41), except for
GND, of P8606?
as well as (34) thru (41), except for
GND, of P8606?
Are there signals at pins (112) thru
(119) of IC8020?
(119) of IC8020?
Are there signals at pins (69) thru (73)
and (189) thru (192) of IC8020?
and (189) thru (192) of IC8020?
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-5
45
XG-C40XU/XE
Yes
Yes
No
No
1
1
Yes
Yes
Yes
Yes
No
No
No
Checking the S-
XGA's green video
circuit and its
peripheral circuits
XGA's green video
circuit and its
peripheral circuits
Checking the VGA's
green video circuit
and its peripheral
circuits
green video circuit
and its peripheral
circuits
Yes
No
Check the video
system's green
video circuit and its
peripheral circuits
system's green
video circuit and its
peripheral circuits
Yes
Yes
No
No
Yes
No
No
Is there signal at pin (124) of IC8606?
Are there signals at pins (68) thru (75)
as well as (78) thru (88), except for
GND, of P8606?
as well as (78) thru (88), except for
GND, of P8606?
Are there signals at TL8045 and
TL8047?
TL8047?
Is there signal at pin (V13)(TL8613) of
IC8609?
IC8609?
Are there signals at pins (11) thru
(20) of IC8051?
(20) of IC8051?
IC8051 or its peripheral circuit or output
PWB faulty.
PWB faulty.
Terminal PWB, C8620 defective.
IC8606 or its peripheral circuit faulty.
IC8025 or its peripheral circuit faulty.
IC8020 or its peripheral circuit faulty.
IC8029 or its peripheral circuit faulty.
IC8609 or its peripheral circuit faulty.
C8703 or its peripheral circuit or signal
PWB faulty.
PWB faulty.
Is there signal at pin (124) of IC8606?
Is there signal at pin (126) of IC8606?
Are there signals at pins (68) thru (75)
as well as (78) thru (88), except for
GND, of P8606?
as well as (78) thru (88), except for
GND, of P8606?
Are there signals at pins (165) thru
(177) of IC8020?
(177) of IC8020?
Are there signals at pins (178) thru (187)
of IC8020?
of IC8020?
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-6
46
XG-C40XU/XE
Yes
Yes
No
No
1
1
Yes
Yes
Yes
Yes
No
No
No
Checking the S-
XGA's blue video
circuit and its
peripheral circuits
XGA's blue video
circuit and its
peripheral circuits
Checking the VGA's
blue video circuit
and its peripheral
circuits
blue video circuit
and its peripheral
circuits
Yes
No
Check the video
system's blue video
circuit and its
peripheral circuits
system's blue video
circuit and its
peripheral circuits
Yes
Yes
No
No
Yes
No
No
Is there signal at pin (133) of IC8606?
Are there signals at pins (45) thru (53)
as well as (56) thru (64), except for
GND, of P8606?
as well as (56) thru (64), except for
GND, of P8606?
Are there signals at TL8048 and
TL8049?
TL8049?
Is there signal at pin (U15)(TL8614) of
IC8609?
IC8609?
Are there signals at pins (21) thru
(30) of IC8051?
(30) of IC8051?
IC8051 or its peripheral circuit or output
PWB faulty.
PWB faulty.
Terminal PWB, C8623 defective.
IC8606 or its peripheral circuit faulty.
IC8025 or its peripheral circuit faulty.
IC8020 or its peripheral circuit faulty.
IC8029 or its peripheral circuit faulty.
IC8609 or its peripheral circuit faulty.
C8704 or its peripheral circuit or signal
PWB faulty.
PWB faulty.
Is there signal at pin (133) of IC8606?
Is there signal at pin (136) of IC8606?
Are there signals at pins (45) thru (53)
as well as (56) thru (64), except for
GND, of P8606?
as well as (56) thru (64), except for
GND, of P8606?
Are there signals at pins (85) thru
(93) of IC8020?
(93) of IC8020?
Are there signals at pins (74) thru (83)
of IC8020?
of IC8020?
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-7
47
XG-C40XU/XE
Checking the OSD circuit and its peripheral circuits
Yes
No
Yes
No
Yes
No
Display OSD on the screen.
Are there signals at pins (56), (58),
(71) and (72) (TL8054,TL8053,TL8052,
TL8051) of IC8048?
(71) and (72) (TL8054,TL8053,TL8052,
TL8051) of IC8048?
Are there signals at pins (12), (14)
thru (17) and (20) of IC8046?
thru (17) and (20) of IC8046?
Are there signals at pins (23) thru
(42) of IC8046?
(42) of IC8046?
IC8048 or its peripheral circuit faulty.
IC8029 or its peripheral circuit faulty.
IC8048 or its peripheral circuit faulty.
IC8046 or its peripheral circuit faulty.
Checking the remote controllor
Yes
No
Use the remote controller. Is there the
signal at pin (59) of P8405?
signal at pin (59) of P8405?
IC8001 circuit faulty.
Output PWB faulty.
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-8
