Read Sharp XV-Z21000 (serv.man3) Service Manual online
XV-Z20000/XV-Z21000/DT-5000
5 – 2
Checking the power unit
Are all the connectors inside the
power unit tightly connected?
power unit tightly connected?
NO
Insert the connectors P702, P704, CN90
and P703 tightly.
and P703 tightly.
YES
Is the lamp cover closed completely?
NO
Tighten up the lamp door closed with the
screws.
screws.
YES
Is the bimetal switch off?
NO
Replace the bimetal switch or press the
red button to reset.
red button to reset.
YES
Is AC voltage applied across the
RY701 relay?
RY701 relay?
NO
Replace F701.
YES
Is AC voltage applied across L706?
NO
Replace F702.
YES
Is there DC voltage of about 6 V
across C723?
across C723?
NO
Check the T701, L705, R706, R718.
Replace any of them as required.
Replace any of them as required.
YES
Is a voltage of DC370V applied to
C737 and C740?
C737 and C740?
NO
Check the circuits leading to the primary
side of T704 for damage.
Replace any of them as required.
side of T704 for damage.
Replace any of them as required.
YES
Is there the specified voltage at the
output terminal of P704?
output terminal of P704?
NO
Check the circuits leading to the second-
ary side of T704 for damage.
Replace any of them as required.
ary side of T704 for damage.
Replace any of them as required.
YES
Check the output PWB.
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