Read Sharp XR-20S (serv.man14) Service Manual online
35
XR-10X/S
XR-20X/S
XR-20X/S
NO
Go to "Check when the
lamp turns off soon after
turning on".
lamp turns off soon after
turning on".
YES
Securely insert the
connectors.
connectors.
YES
Securely insert the
connectors.
connectors.
YES
Check IC3581 and
peripheral circuits. (Refer
to the waveform chart 2.)
peripheral circuits. (Refer
to the waveform chart 2.)
NO
Check IC1701 and
peripheral circuits. (Refer
to the waveform chart 1.)
peripheral circuits. (Refer
to the waveform chart 1.)
NO
Fully insert the connectors
or replace the harnesses.
or replace the harnesses.
YES
Replace the lamp.
YES
Go to "Power supply PWB
check".
check".
NO
Replace both D911 and
D912.
D912.
YES
Replace D914 or D910,
whichever is short-circuited.
whichever is short-circuited.
YES
Replace the color wheel.
YES
Checking the lamp
light-up
Does the lamp turn on
when the power is turned
when the power is turned
Is the lamp tight in the
socket?
socket?
NO
Has the FPC cable to
SC3581 come off or is it
loose?
SC3581 come off or is it
loose?
Is rotating sound of the
color wheel heard?
color wheel heard?
NO
Is approx. 0.7 V applied to
TL1706?
TL1706?
YES
NO
Has the harness connected
to P702 on the power
supply unit come off, or is it
loose? Otherwise, is it
broken?
to P702 on the power
supply unit come off, or is it
loose? Otherwise, is it
broken?
NO
Dose the lamp turn on after
the replacement?
the replacement?
YES
Is 340 VDC applied to both
ends of C914?
ends of C914?
NO
Is D911 or D912 short-
circuited?
circuited?
Is D914or D910 short-
circuited?
circuited?
YES
Click on the first or last page to see other XR-20S (serv.man14) service manuals if exist.