Toshiba MM20E45 - Page 85

14-4
4. No Horizontal Scan
No horizontal scan
Is flyback pulse
generatedat collector
of QH30?
Is voltage at collector of
QH30 higher than +30V?
Is voltage at both ends
of CH55 higher than 30V?
Check and repair chopper
regulator. ICK01, ICK02,
TK01, QH25 and associated
circuit.
Check and repair DY,
LH04, CH65, P401 and
pattern.
Check and repair drive
circuit. QH33, TH03, QH30
and associated circuits.
Check and repair TH02
and pattern.
NG
NG
NG