Sharp XG-NV5XE (serv.man40) Service Manual ▷ View online
41
XG-NV5XE
XG-NV5XM
XG-NV5XM
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-4
C
Yes
Yes
No
No
C
Yes
Yes
No
No
Yes
Yes
Yes
No
No
Yes
Are there signals at TL45 and TL47?
Yes
No
No
Yes
No
Are there signals at pins (179) thru
(187) of IC8020?
(187) of IC8020?
IC8020 or its peripheral circuit faulty.
Yes
Yes
No
Are there signals at pins (5) and (6) of
CON4 (P8405) connector?
CON4 (P8405) connector?
Are there signals at pins (11) thru (20)
of IC8051?
of IC8051?
IC8051 or its peripheral circuit faulty.
No
IC8029 or its perpheral circuit faulty.
No
IC8025 or its peripheral circuit faulty.
CON4 (P8405) connector or output
PWB faulty.
PWB faulty.
Checking the S-
VGA's green video
circuit and its
peripheral circuits
VGA'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
Are there signals at pins (177) thru
(185) of IC8020?
(185) of IC8020?
Check the video
system's green
video circuit and its
peripheral circuits
system's green
video circuit and its
peripheral circuits
Is there signal at pin (8) of IC8004?
Is there signal at pin (8) of IC8004?
LCP circuitry faulty.
Is there signal at the base of Q8006?
Is there signal at the base of Q8006?
IC8004 or its peripheral circuit faulty.
Is there signal at pin (6) of IC8010?
Is there signal at pin (6) of IC8010?
Q8006 and Q8007 or there peripheral
circuit faulty.
circuit faulty.
Are there signals at pins (21) thru (27)
and (33) thru (40) of IC8010?
and (33) thru (40) of IC8010?
Are there signals at pins (112) thru
(119) of IC8020?
(119) of IC8020?
IC8010 or its peripheral circuit faulty.
42
XG-NV5XE
XG-NV5XM
XG-NV5XM
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-5
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes
Yes
No
No
Yes
Are there signals at TL48 and TL49?
Yes
No
No
Yes
No
Are there signals at pins (74) thru (83)
of IC8020?
of IC8020?
IC8020 or its peripheral circuit faulty.
Yes
Yes
No
No
No
IC8020 or its peripheral circuit faulty.
CON4 (P8405) connector or output
PWB faulty.
PWB faulty.
Yes
No
Are there signals at pins (85) thru (93)
of IC8020?
of IC8020?
Check the video
system's blue video
circuit and its
peripheral circuits.
system's blue video
circuit and its
peripheral circuits.
Is there signal at pin (3) of IC8004?
Is there signal at pin (3) of IC8004?
LCP circuitry faulty.
Is there signal at the base of Q8004?
Is there signal at the base of Q8004?
IC8004 or its peripheral circuit faulty.
Is there signal at pin (6) of IC8009?
Is there signal at pin (6) of IC8009?
Q8004 and Q8005 or there peripheral
circuit faulty.
circuit faulty.
Are there signals at pins (21) thru (27)
and (33) thru (40) of IC8009?
and (33) thru (40) of IC8009?
Are there signals at pins (112) thru
(119) of IC8020?
(119) of IC8020?
IC8009 or its peripheral circuit faulty.
Are there signal at pins (1) and (2) of
CON4 (P8405) connector?
CON4 (P8405) connector?
IC8051 or its peripheral circuit faulty.
Are there signal at pins (21) thru (30)
of IC8051?
of IC8051?
IC8018 or its peripheral circuit faulty.
Checking the S-
VGA's blue video
circuit and its
peripheral circuits
VGA'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
D
D
43
XG-NV5XE
XG-NV5XM
XG-NV5XM
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-6
Checking the OSD circuit and its peripheral circuits
Yes
Display OSD on the screen.
Yes
No
Are there signals at pins (56), (58),
(71) and (72) of IC8048?
(71) and (72) of IC8048?
IC8029 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (34), (35)
and (36) of IC8046?
and (36) of IC8046?
IC8048 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (16) thru
(18) of IC8046?
(18) of IC8046?
IC8048 or its peripheral circuit faulty.
IC8036 or its peripheral circuit faulty.
Yes
No
Using remote controller, is there
signal at pin (48) of IC8033?
signal at pin (48) of IC8033?
IC8001 circuit faulty.
Yes
No
Using remote controller, is there
signal at pin (45) of IC8033?
signal at pin (45) of IC8033?
IC8033 circuit faulty.
Yes
No
IC8033 circuit faulty.
LCP-side circuit faulty.
Checking the remote control
Yes
No
Run the remote control. Are there
signals at pin (59) of CON3 (P8502)
connector?
signals at pin (59) of CON3 (P8502)
connector?
LCD circuitry faulty.
Using remote controller, is there
signal at pin (60) of CON3 (P8502)
connector?
signal at pin (60) of CON3 (P8502)
connector?
43
XG-NV5XE
XG-NV5XM
XG-NV5XM
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-6
Checking the OSD circuit and its peripheral circuits
Yes
Display OSD on the screen.
Yes
No
Are there signals at pins (56), (58),
(71) and (72) of IC8048?
(71) and (72) of IC8048?
IC8029 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (34), (35)
and (36) of IC8046?
and (36) of IC8046?
IC8048 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (16) thru
(18) of IC8046?
(18) of IC8046?
IC8048 or its peripheral circuit faulty.
IC8036 or its peripheral circuit faulty.
Yes
No
Using remote controller, is there
signal at pin (48) of IC8033?
signal at pin (48) of IC8033?
IC8001 circuit faulty.
Yes
No
Using remote controller, is there
signal at pin (45) of IC8033?
signal at pin (45) of IC8033?
IC8033 circuit faulty.
Yes
No
IC8033 circuit faulty.
LCP-side circuit faulty.
Checking the remote control
Yes
No
Run the remote control. Are there
signals at pin (59) of CON3 (P8502)
connector?
signals at pin (59) of CON3 (P8502)
connector?
LCD circuitry faulty.
Using remote controller, is there
signal at pin (60) of CON3 (P8502)
connector?
signal at pin (60) of CON3 (P8502)
connector?
