DOWNLOAD Sharp XG-NV21SE (serv.man4) Service Manual ↓ Size: 147.96 KB | Pages: 29 in PDF or view online for FREE

Model
XG-NV21SE (serv.man4)
Pages
29
Size
147.96 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Resetting the total lamp timer, The optical unit outline, Covergence and focus adjustment, Electrical adjustment, Adjusting the PC board, Troubleshooting table - Page 15-43
File
xg-nv21se-sm4.pdf
Date
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39
XG-NV21SE
XG-NV21SM
XG-NV21SA
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-2
Checking the PLL circuit and its peripheral circuits
Yes
No
Are there signals at pins (4) and (5) of 
IC8026?
IC8025 or its peripheral circuit faulty.
Yes
No
Is there signal at pin (236) of IC8025?
No
Are there signals at pins (6) and (22) 
of IC8015?
IC8026 or its peripheral circuit faulty.
IC8025 or its peripheral circuit faulty.
Yes
No
Is there signal at pin (15) of IC8015?
IC8015 or its peripheral circuit faulty.
Yes
Check the video circuit and its 
peripheral circuits.
No
Is image as specified at resolution 
above S-VGA level?
Check the XGA video circuit and its 
peripheral circuits. 
Yes
No
Is image as specified at resolution 
below S-VGA level?
Check the S-VGA video circuit and its 
peripheral circuits. 
Yes
No
Hook up a video system. Is the 
display as specified?
Check the video system's video 
circuit and its peripheral circuits. 
Yes
A
40
XG-NV21SE
XG-NV21SM
XG-NV21SA
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-3
Yes
Yes
No
No
Is there signal at pin (13) of IC8004?
Is there signal at pin (13) of IC8004?
LCP circuitry faulty.
B
B
Yes
Yes
No
No
Is there signal at the base of Q8029?
Is there signal at the base of Q8029?
Q8029 or its peripheral circuit faulty.
Yes
Yes
Yes
No
No
Is there signal at pin (6) of IC8011
Is there signal at pin (6) of IC8011?
IC8008 or its peripheral circuit faulty.
Yes
No
No
Are there signals at RI1A0 thru -7 and 
RI1B0 thru -7 of IC8025?
Are there signals at VAR0 thru -7 of 
IC8020?
IC8011 or its peripheral circuit faulty.
Yes
No
Are there signals at RI2A0 thru -7 and 
RI2B0 thru -7 of IC8025?
IC8020 or its peripheral circuit faulty.
Yes
No
Are there signals at R1 thru -10 and 
G1 thru -10 of IC8030?
IC8025 or its peripheral circuit faulty.
Yes
No
Are there signals at the bases of 
Q8015 and Q8017?
IC8030 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (9) and (11) 
of TC2 connector?
Q8013, Q8014 thru Q8017 or their 
peripheral parts faulty.
TC2 connector or output PWB faulty.
Checking the S-
VGA's red video 
circuit and its 
peripheral circuits
Checking the VGA's 
red video circuit and 
its peripheral  
circuits
Yes
No
Are there signals at VBR0 thru -7 of 
IC8020?
Check the video 
system's red video 
circuit and its 
peripheral circuits
41
XG-NV21SE
XG-NV21SM
XG-NV21SA
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-4
Yes
Yes
No
No
Is there signal at pin (8) of IC8004?
Is there signal at pin (8) of IC8004?
LCP circuitry faulty.
Yes
Yes
No
No
Is there signal at the base of Q8030?
Is there signal at the base of Q8030?
IC8004 or its peripheral circuit faulty.
Yes
Yes
Yes
No
No
Is there signal at pin (6) of IC8010?
Is there signal at pin (6) of IC8010?
Q8030 or its peripheral circuit faulty.
Yes
No
No
Are there signals at GI1A0 thru -7 and 
GI1B0 thru -7 of  IC8025?
Are there signals at VAG0 thru -7 of 
IC8020?
IC8010 or its peripheral circuit faulty.
Yes
No
Are there signals at GI2A0 thru -7 and 
GI2B0 thru -7 of IC8025?
IC8020 or its peripheral circuit faulty.
Yes
No
Are there signals at B1 thru-10 of 
IC8030 and B1 thru-10 of IC8031?
IC8025 or its peripheral circuit faulty.
Yes
No
Are there signals at the bases of 
Q8019 and Q8021?
IC8031 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (5) and (7) of 
TC2 connector?
Q8013, Q8018 thru Q8021 or their 
peripheral parts faulty.
TC2 connector or output PWB faulty.
Checking the S-
VGA's green video 
circuit and its 
peripheral circuits
Checking the VGA's 
green video circuit 
and its peripheral 
circuits
Yes
No
Are there signals at VBR0 thru -7 of 
IC8020?
Check the video 
system's green 
video circuit and its 
peripheral circuits
C
C
42
XG-NV21SE
XG-NV21SM
XG-NV21SA
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-5
Yes
Yes
No
No
Is there signal at pin (3) of IC8004?
Is there signal at pin (3) of IC8004?
LCP circuitry faulty.
Yes
Yes
No
No
Is there signal at the base of Q8031?
Is there signal at the base of Q8031?
IC8004 or its peripheral circuit faulty.
Yes
Yes
Yes
No
No
Is there signal at pin (6) of IC8009?
Is there signal at pin (6) of IC8009?
Q8031 or its peripheral circuit faulty.
Yes
No
No
Are there signals at BI1A0 thru -7 and 
BI1B0 thru -7 of  IC8025?
Are there signals at VAB0 thru -7 of 
IC8020?
IC8009 or its peripheral circuit faulty.
Yes
No
Are there signals at BI2A0 thru -7 and 
BI2B0 thru -7 of IC8025?
IC8020 or its peripheral circuit faulty.
Yes
No
Are there signals at R1 thru -10 and 
G1 thru -10 of IC8031?
IC8025 or its peripheral circuit faulty.
Yes
No
Are there signals at the bases of 
Q8023 and Q8025?
IC8031 or its peripheral circuit faulty.
Yes
No
Are there signals at pins (1) and (3) of 
TC2 connector?
Q8013, Q8022 thru Q8025 or their 
peripheral parts faulty.
TC2 connector or output PWB faulty.
Checking the S-
VGA's blue video 
circuit and its 
peripheral circuits
Checking the VGA's 
blue video circuit 
and its peripheral 
circuits
Yes
No
Are there signals at VBB0 thru -7 of 
IC8020?
Check the video 
system's blue video 
circuit and its 
peripheral circuits.
D
D
    
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