Read Sharp 51AT-15H (serv.man20) Technical Bulletin online
Sharp Electronics (UK) Limited
Originator AvW Supervisor Approval Date / / Reference JC110199/32
Revision 1
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV990112
Month of Issue: January 1998
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
MODELS
51AT15H
51DT25H
SYMPTOM Doming caused by high beam current in limited areas of the CRT shadowmask
causing short term purity errors.
ACTION
Enter the test mode and reduce the RGB gain settings to reduce the beam current
until doming does not occur.
until doming does not occur.
It is recommended that each gain setting is reduced by a factor of 5 (hexidecimal
format), but this can be changed as necessary.
format), but this can be changed as necessary.
Note that it is important that a correct grey scale is maintaned while adjusting the RGB
settings.
settings.
Display
