Read Sharp XG-NV1E (serv.man5) Service Manual online
XG-NV1E
XG-NV1EA
XG-NV1EA
TROUBLE SHOOTING TABLE
(Continued)
34
Lamp failure to light up
No
No
Yes
Yes
Yes
Replace TGU1701. Check
connectors.
connectors.
Is discharge noise heard?
No
Yes
Replace F701. Check and replace
Q1701.
Q1701.
Yes
Yes
Is F701 blown out?
No
Check DB701 and its peripheral parts.
No
Replace Q1702.
Yes
Is FET drive voltage applied from pin
(2) of IC1701?
(2) of IC1701?
No
IC1702 or nearby circuit in trouble.
Yes
No
Q1703 or nearby circuit in trouble.
Replace F704 or TF1701.
Is F704 or TF1701 blown out?
Yes
TGU1701 faulty.
Is voltage applied at TGU1701?
No
Is voltage applied to pin (16) of
IC1701?
IC1701?
Is voltage applied to pin (1) of
connector BL?
connector BL?
No
Check IC5001 and its peripheral
circuits.
circuits.
Lamp faulty. Replace.
Does new lamp light up?
Is voltage applied across C1703?
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