Sylvania 6842THG Service Manual page 111

Defect: F/White low discharge
– Symptom: Low discharge caused by unstable cells
occurring at full white pattern if high (60 degree) or
normal temperature.
– Cause:
1) Panel: MgO source/dielectric thickness cell
pitch/phosphor
2) Circuit: drive waveform/ voltage condition
Defect: Weak discharge
– Symptom: Normal discharge but cells appear
darker due to weak light emission occurring mainly
at low (5 degree) Full white/Red/Green/Blue pattern
or gradation pattern
– Cause:
1) Panel: MgO deposition count and thinckness/
aging condition
2) Circuit: drive waveform/voltage condition
2-3-16 PZ3PDMOP