Sony KE-42M1 Service Manual page 30

Defect: 20. F/White Low Discharge
Symptom: Low discharge caused by unstable cells
occurring at Full White pattern of high (60 degrees) or
normal temperature.
Cause :
(1) Panel: MgO source/Dielectric thickness/Cell
pitch/Phosphor
(2) Circuit : Drive waveform/Voltage condition
Defect: 21. Weak discharge
Symptom: Normal discharge, but cells appear darker
due to weak light emission occurring mainly at low (5
degrees) Full White/Red/Green/Blue patterns or
gradation pattern.
Cause :
(1) Panel : MgO deposition count and thickness/Aging
condition
(2) Circuit : Drive waveform/Voltage condition
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