Sharp bulletin 37At25H-020.pdf part of Sharp Sharp_Bulletins Sharp_Bulletins_1.zip, Sharp_Bulletins

Text preview for : Sharp bulletin 37At25H-020.pdf part of Sharp Sharp_Bulletins Sharp_Bulletins_1

Back to : Sharp_Bulletins_1.zip | Home

CTV990114 TELEVISION TECHNICAL BULLETIN
Month of Issue: January 1998 Classification: White Page 1 of 1

MODELS

37AM12H

37AM23H

37AT25H

51AT15H

SYMPTOM
No teletext Teletext jitters Unable to release child lock Intermittent sound and picture or ragged verticals Will not select tuning menu Tuning will not lock Blank raster of picture fades Line fold over Repeated failure of Q602 Stuck in standby Frame cramping Lack of height Excessive height Drifting off tune No remote control functions and/or front buttons not operating

ACTION
Decrease R1072 to 470k or replace D1002 Fit a 220nf capacitor in parallel with R521 (see Technical Bulletin CTV970808) Refer to Technical Bulletin CTV970208. Refer to Technical Bulletin CTV970206.

Set NVM location 0B to read B8 or replace D1002. Dry joint on L205 or AFT VCO adjustment incorrect. D1002. D1002. Replace C713 with a 105 C type and replace D1002. Noise on 5V supply, replace D709 (may not read faulty). Replace D709, C713 and check semiconductors in the frame stage. R521 and adjust in service mode. R508. Refer to Technical Bulletin CTV970508. Q510. Check other components in frame stage
o

If you have a fault to add to the above list, please do no hesitate to contact Sharp Technical Support using the Hot Line telephone number.

Sharp Electronics (UK) Limited
Reference AVW120199/2 Revision 2 White Carry out as required, Yellow Carry out as required and whenever the unit comes in for service, Red Carry out on all units