3-3
Yes
Yes
Yes
Yes
No
No
No
No
FLOW CHART NO.11
The fluorescent display tube does not light up.
Is 3.3V voltage supplied to Pin(6, 24) of IC571?
Is approximately -24V to -28V voltage supplied to
Pin(15) of IC571?
Is there approximately 500kHz oscillation to
Pin(26) of IC571?
Are the filament voltage applied between (1, 2)
and (34, 35) of the fluorescent display tube?
Also negative voltage applied between these pins
and GND?
Replace the fluorescent display tube.
Check the EV+3.3V line and service it if detective.
Check the -FL (-28V) line and service it if
detective.
Check R572, IC571 and their periphery, and
service it if detective.
Check the power circuit, D1016, D1017,
R1042, C1018 and their periphery, and
service it if detective.
Содержание DV-PF33U
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