DOWNLOAD Sharp XG-MB67X (serv.man3) Service Manual ↓ Size: 577.66 KB | Pages: 11 in PDF or view online for FREE

Model
XG-MB67X (serv.man3)
Pages
11
Size
577.66 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Troubleshooting Table
File
xg-mb67x-sm3.pdf
Date
PREV: Sharp XG-MB67X (serv.man2) Service Manual

Sharp XG-MB67X (serv.man3) Service Manual ▷ View online

XG-MB67X
8 – 5
Power supply PWB-
check
Is 6 V applied to pins 
(7) and (8) of the con-
nector P704?
NO
YES
Is 13 V applied to 
pins (3) and (4) of the 
connector P704?
NO
Check peripheral cir-
cuits of IC703.
YES
Does the lamp turn 
on?
NO
Are connectors P704 
and CN901 fully 
inserted?
NO
Securely insert the con-
nectors.
YES
YES
Check the main 
PWB.
Is DC voltage of 380 V 
applied to both ends 
of C704?
NO
Is pin (11) of the connec-
tor P704 at "H"?
NO
Check the main 
PWB.
YES
YES
Check peripheral circuits 
of IC902.
Is R766 in the OPEN 
status?
NO
Is LAMP-EN/SYNC sig-
nal properly sent to pin 
(14) of the connector 
P704? (Refer to the 
waveform chart 
.)
NO
Check the main 
PWB.
YES
YES
Check circuits R766 
and after or replace 
R766.
Are GATE waveforms of 
Q901 and Q903 appro-
priate? (See waveform 
diagram .)
NO
Check the Power 
PWB.
1
1
8
XG-MB67X
8 – 6
Are connectorsP701 and P702 fully 
inserted?
NO
Securely insert the connectors.
YES
Is AC voltage between 100 – 240 V 
applied to both ends of C707?
NO
Replace F701.
YES
Is the bimetal broken? (Connection 
between 1 and 2 of P702)
NO
Press the red button on the 
bimetal.
YES
Is R717 open?
NO
Is R705 open?
NO
Check peripheral circuits of 
IC703.
YES
YES
Check that P704 connector pin (11) 
is at "H". Replace R717.
Replace F705. 
Check that the power supply FAN 
FB and FC are not stopped.
1
XG-MB67X
8 – 7
Checking the lamp light-up
Does the lamp turn on 
when the power is turned 
on?
YES
Go to "Check when the 
lamp turns off soon after 
turning on".
NO
Is the lamp tight in the 
socket?
YES
Securely insert the con-
nectors.
NO
Has the FPC cable to 
SC3581 come off or is it 
loose?
YES
Securely insert the con-
nectors.
NO
Is rotating sound of the 
color wheel heard?
NO
Check IC3581 and periph-
eral circuits. (Refer to the 
waveform chart 
.)
YES
Replace the color wheel.
YES
Is approx. 0.7 V applied to 
TL1706?
NO
Check IC1701 and periph-
eral circuits. (Refer to the 
waveform chart 
.)
YES
Has the harness connected 
to P702 on the power sup-
ply unit come off, or is it 
loose? Otherwise, is it bro-
ken?
YES
Fully insert the connec-
tors or replace the har-
nesses.
NO
Dose the lamp turn on after 
the replacement?
YES
Replace the lamp.
NO
Is 340 VDC applied to both 
ends of C914?
NO
Go to "Power supply PWB 
check".
YES
Is D911 or D912 shortcir-
cuited?
YES
Replace both D911 and 
D912.
NO
Is D914or D910 shortcir-
cuited?
YES
Replace D914 or D910, 
whichever is short-cir-
cuited.
2
1
XG-MB67X
8 – 8
Check when the lamp turns 
off soon after turning on
Have connectors P1703, 
P1721, P1722, P1723 and 
P1724 come off or are they 
loose?
YES
Securely insert the connec-
tors.
NO
Is each cooling fan rotating?
NO
Check the cooling fan.
YES
Is approx. 3 V applied to 
TL1721?
NO
Check peripheral circuits of 
Q1721.
YES
Is 12 V applied to TL1761?
NO
Check IC1761, IC3581 and 
peripheral circuits.
Go to "DMD system check".
YES
Is 2.5 V applied to TL1763?
NO
Is 3.3 V applied to TL1762? YES
Check IC1762 and peripheral cir-
cuits.
YES
NO
Check IC1763 and periph-
eral circuits.
Is 5 V applied to TL1791?
NO
Check IC1791 and periph-
eral circuits.
YES
Is 5 V applied to TL1712?
NO
Is 5 V applied to TL1712 
with P1703 removed?
NO
Check connection of FB1710.
YES
YES
Is the signal of 180 Hz sent to 
TL1716? (When vertical fre-
quency of the input signal is 
60 Hz)
NO
Check PHOTO SENSOR 
PWB.
YES
Is the signal of 180 Hz sent to 
TL1706? (When vertical fre-
quency of the input signal is 
60 Hz)
NO
Check IC1701 and periph-
eral circuits.
YES
Check the power PWB.
Page of 11
Display

Click on the first or last page to see other XG-MB67X (serv.man3) service manuals if exist.

RANDOM: