DOWNLOAD Sharp XV-Z90E (serv.man10) Service Manual ↓ Size: 30.65 KB | Pages: 10 in PDF or view online for FREE

Model
XV-Z90E (serv.man10)
Pages
10
Size
30.65 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Troubleshooting table
File
xv-z90e-sm10.pdf
Date

Sharp XV-Z90E (serv.man10) Service Manual ▷ View online

25
XV-Z90E
Checking of SOG Circuit
Measure the (7) pin of IC5012 
with an oscilloscope.
This is the failure of the SOG 
synchronization separator circuit.
Is there the Y signal including sync 
signal?
Measure the (7) pin of IC5010 
with an oscilloscope.
Is the composite synchronized 
signal regenerated at proper timing?
No
Is there output of the (25) pin 
of IC3102?
No
The SOG circuit is normal. 
End.
Yes
Yes
Yes
Check around Q5002.
No
Input the S-Video terminal (Y, C) 
signal to INPUT 3. Select INPUT 3 
with the keys on the main body or 
the remote controller.
Is the signal N358?
Does the picture appear?
Is the picture disturbed?
End.
Is the picture signal inputted to the 
connector TC (5) (7) pins?
Yes
No
No
No
No
Yes
No
In the picture signal inputted to 
IC3105 (43) (44) pins?
Yes
Check the input side PWB .
Check IC3505 and the 
peripheral circuits of the IC.
Yes
Yes
Check of the S-Video terminal input.
Check the Y, C signal 
lines.
Check IC3105 and the 
peripheral circuits of the 
IC.
1
Note
Only in case of N358, the noise reduction 
function of IC3505 is used and the noise is 
reduced, so it is inputted to IC3105 (5), (7).
26
XV-Z90E
Feed the composite video signal to 
INPUT 4. Select INPUT 4 using the 
set's key or the remote controller.
Does the picture appear?
Is the picture disturbed?
End.
Is the picture signal inputted to the 
connector TC (9) pin?
Yes
Yes
No
No
Yes
Check the TERMINAL2 PWB.
No
Is the picture signal inputted to the 
(1) pin of IC3105?
Yes
Check the VIDEO-IN signal 
line ofIC3502 and IC3503.
No
Is input coming to IC3104 (1) (3) (5)?
Yes
Check IC3102 peripheral circuits.
No
Is output coming from IC3104 (16) (18) (20)?
Yes
Check IC3104 peripheral circuits.
No
Is the picture signal inputted to IC6004 (43) (48) (54) 
and the synchronized signal inputted to (30) (31)?
Yes
Check around IC3104, IC6001 and IC6002.
No
Is each digital output coming on IC6004 (64) (65) (66) (67)?
Yes
Check IC6004 peripheral circuits.
No
Is output coming from IC8001, DPORT?
Check the formatter PWB.
Yes
Check IC8001 peripheral circuits.
No
Is it N358 signal?
No
Check around IC3501, 3505.
Yes
Is it PAL?
No
Check around IC3504, 3506.
Yes
Is it SECAM?
Check the color system, around IC3105. Others.
No
Check around IC 3105. 
Malfunction of the color 
system is thinkable.
Yes
Checking of Video Input
Check IC3102 peripheral 
circuits.
1
3
No
Yes
Is synchronized signal 
coming to IC3102 (28) (29) 
pins?
2
Note
In case of N358, Y/C separates at IC3505 3 DY/C and inputted 
to IC3105 (5) (7) pins.
In case of PAL system, Y/C separates at IC3506 3 Line COM 
and inputted to (39) (41) of IC3105.
The video is outputted from (21) (22) (23) at color difference 
from IC3105.
27
XV-Z90E
Input the Component signal from INPUT 1.
Select INPUT 1 with the keys on the main body or the 
remote control.
Check IC3102 and around it.
Are IC3102 (76) (77) (78) 
outputting and the signals inputted 
to (73) (74) (75)?
Is the picture disturbed?
Is picture outputted?
Is the signal coming to the 
connector TD?
Yes
No
Check of the Terminal 2 PWB.
No
No
Yes
No
Yes
Is the picture signal coming to 
IC3102 (3) (4) (5)?
Check between the connector TD 
and IC3102.
No
Yes
Yes
Check of component 15 pin D-sub 
input
End.
1
4
28
XV-Z90E
Checking of Sync Signal
Is the horizontal synchronized 
signal on IC5001 (6) pin?
Is the vertical synchronized signal 
on IC5002 (6) pin?
Is the synchronized signal is 
outputted from IC5009, IC5005, 
IC5006, IC5007, IC5008?
Are the timing of both vertical and 
horizontal synchronized signals 
correct?
Is the horizontal synchronized 
signal on IC6004 (30) pin?
Is the vertical synchronized signal 
on IC6004 (31) pin?
The sync signal is normal. 
End of checking.
Yes
No
Check the PWB of the signal input 
part.
No
Yes
Yes
Yes
Yes
No
Yes
Check each IC and the peripheral 
circuit of IC.
No
Check IC6001, IC6002 and IC 
peripheral circuits.
No
Set the signal source appropriately.
No
2
Is the signal generator (input 
source) correct?
Yes
IC8001 and its periphery is 
defective.
No
Is the horizontal synchronized 
signal on IC6004 (66) pin?
Is the vertical synchronized signal 
on IC6004 (64) pin?
Yes
Yes
No
Failure of IC6004 and IC 
peripheral circuit.
No
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