DOWNLOAD Sharp XG-NV7XE (serv.man3) Service Manual ↓ Size: 1.04 MB | Pages: 43 in PDF or view online for FREE

Model
XG-NV7XE (serv.man3)
Pages
43
Size
1.04 MB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Service Instructions, Troubleshooting Intro to DMD
File
xg-nv7xe-sm3.pdf
Date
PREV: Sharp XG-NV7XE (serv.man2) Service Manual / Specification

Sharp XG-NV7XE (serv.man3) Service Manual ▷ View online

37
XG-NV7XE
XG-NV7XM
TROUBLE SHOOTING TABLE 
(Continued)
Lamp fails to light-up
Yes
Yes
No
No
No
No
No
No
Yes
Yes
Turn on the power switch. Is 
discharging sound heard from 
the lamp?
Are the cooling fans running?
Is 2.5V voltage applied between 
pins (1) and (3) of DC connector?
Is color wheel turning?
Is there vertical sync signal 
input at pin (47) of P8503?
PC board in trouble.
Is specified voltage applied at 
PA and PB connectors?
Reconnect the connectors to 
their sockets.
Is DC 380V voltage applied 
between pins (1) and (3) of PL 
connector and DC 12V voltage 
applied between pins (4) and 
(5) of PL connector?
Yes
Ballast unit in trouble.
Yes
DMD output formatter in 
trouble.
Is DB connector or flexible 
cable out of position or in poor 
contact?
Reconnect the connector 
tightly.
Yes
No
DMD output formatter in 
trouble.
No
DMD output formatter in 
trouble.
No
Yes
Yes
No
Yes
Is power supplied on DMD 
formatter?
P8503: pins (1), (3) and (5); 5V
       
pins (7), (9) and (11); 12V
       
pins (13), (15), (17) 
and (21); 3.3V
Check the power circuit.
Is the lamp out of socket?
Reconnect the 
lamp into socket.
Replace the 
lamp.
38
XG-NV7XE
XG-NV7XM
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-1
Checking the clock circuit and its peripheral circuits
Yes
Yes
Yes
Yes
Yes
Yes
No
Is X8001 (6MHz) oscillating?
X8001 or its peripheral part faulty.
No
No
Is X8002 (32.768kHz) oscillating?
X8002 or its peripheral part faulty.
No
Is X8004 (22.165MHz) oscillating?
X8004 or its peripheral part faulty.
No
Is X8005 (14.3185MHz) oscillating?
X8005 or its peripheral part faulty.
Is X8003 (1.84MHz) oscillating?
No
Does pin (162) of IC8001 function?
X8003 or its peripheral part faulty.
IC8001 or its peripheral circuit faulty.
Checking the panel link input.
Yes
No
Is the signal a panel link input?
No
Terminal unit defective.
Yes
Are there signals at pins (1) thru (8) 
of connector P8003?
Yes
No
IC8298 defective. 
Are there sync signals at pins (47) 
and (48) of IC8298?
B
B
39
XG-NV7XE
XG-NV7XM
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-2
Checking the sync signal circuit and its peripheral parts
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
B
Is the sync signal of separate type?
No
 Are there signals at TP4 and TP5?
IC302 or terminal unit defective.
Is the sync signal SYNC ON GREEN?
No
Is there signal at pin (7) of IC8036?
IC23, IC34, IC36 or peripheral part 
defective.
No
Are there signals at pins (149)(TL8034) 
and (150)(TL8035) of IC8020?
IC8025 or peripheral part defective.
Is the input a lower-than-XGA-resolution 
signal or a video signal?
Yes
No
Are there signals at pins (26)(TL8043), 
(28)(TL8041) and (29)(TL8042) of IC8020?
IC8020 or peripheral part defective.
No
Are there signals at even-numbered pins 
from (52) thru (100) of IC8503?
IC8029 or peripheral part defective.
Checking the PLL circuit and its peripheral parts
No
Are there signals at pins (6) and (22) of 
IC8015?
Yes
No
No
Are there signals at pins (18) and (19) of 
IC8015?
Yes
Checking the video circuit and its 
peripheral parts.
Yes
Is the higher-than-XGA-resolution display 
as specified?
Yes
Is the lower-than-XGA-resolution display 
as specified?
Yes
No
Is the display as specified with VCR 
connected?
IC8025 or peripheral part defective.
IC8015 or peripheral part defective.
Is there a panel link input?
Is there a panel link input?
Go to "Checking the video circuit and its 
peripheral parts".
Go to "Checking the SXGA video circuit 
and its peripheral parts".
No
Go to "Checking the aVGA video circuit 
and its peripheral parts".
No
No
No
C
A
D
Yes
E
C
No
No
40
XG-NV7XE
XG-NV7XM
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-3
Yes
Yes
No
No
Is there signal at pin (6) of IC8067?
Is there signal at pin (6) of IC8067?
Terminal unit, IC301, IC313 or IC312 
defective.
Yes
Yes
No
No
Is there signal at the base of Q8009?
Is there signal at the base of Q8009?
 IC8067 or peripheral part defective.
Yes
Yes
Yes
No
No
Is there signal at pin (6) of IC8011?
Yes
Are there signals at TL8044 and 
TL8046?
Is there signal at pin (6) of IC8011?
Q8009 or peripheral part defective.
Yes
Yes
No
No
No
Are there signals at pins (21) thru (27) 
as well as (33) thru (40) of IC8011?
Are there signals at pins (21) thru (27) 
as well as (33) thru (40) of IC8011?
Are there signals at pins (112) thru 
(119) of IC8020?
IC8011 or peripheral part defective.
Yes
No
Are there signals at pins (69) thru (73) 
as well as (189) thru (192) of IC8020?
IC8020 or peripheral part defective.
Yes
Yes
No
Are there signals at pins (86), (88), (90), 
(92), (94), (96), (98) and (100) of IC8503?
Are there signals at pins (2) thru (9) of 
IC8294?
IC8294 or peripheral part defective.
Formatter unit defective.
No
IC8029 or peripheral part defective.
No
IC8025 or peripheral part defective.
Connector P8503 or formatter unit 
defective.
Checking the SXGA 
red video circuit 
and its peripheral 
parts 
Checking the VGA 
red video circuit 
and its peripheral 
parts
Yes
No
Are there signals at pins (35) thru (42) 
of connector SC8001?
Checking the red 
video circuit and 
its peripheral parts
F
E
D
F
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