Date: 10/02/98 R762716
EHT Module
R762716
9
- Connect the oscilloscope to the resistor R47 (=gate switching transistor Q12)
- Switch on the projector.
- Adjust potentiometer P3 for a drive pulse 'time OFF' width of 6.2 us.
Y
5V/DIV
X
5us/DIV
CH 15 Vpp
P1 High Voltage Adj.
P2 Hold Down
- Switch off the projector
- Put the fuse 2A in its place.
-
Switch on the projector
- Adjust potentiometer P1 "High Voltage Adj." until the EHT voltage reaches
36.5kV.
- Turn potentiometer P2 "Hold Down" until the Hold Down LED D13 lights up. The
projector switches at that moment into the Hold Down mode, picture disapears.
- Put the potentiometer P1again in its minimum position (turning counter
clockwise!!).
- Turn the power switch in its OFF position (not-pressed) and switch on the
projector again (press the power switch).
- Adjust the potentiometer P1 for an EHT voltage of 34.7kV.
Important:
The EHTsplitter, on which a potentiometer is mounted , leaves the
factory as a factory pre-adjusted unit. A readjustment of the mentioned
potentiometer is in no case allowed.
time OFF
Summary of Contents for GRAPHICS 1209S
Page 4: ...BARCO PROJECTION SYSTEMS GRAPHICS 1209S 90 00972 230V AC 90 00977 120V AC SAFETY NOTICE...
Page 9: ...BARCO PROJECTION SYSTEMS GRAPHICS 1209S 90 00972 230V AC 90 00977 120V AC GENERAL INFORMATION...
Page 28: ...BARCO PROJECTION SYSTEMS GRAPHICS 1209S 90 00972 230V AC 90 00977 120V AC SERVICE SHEETS...
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Page 339: ...Date 10 02 98 R7627591 Frame cpl R7627591 1 SERVICE SHEET R806430...
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Page 354: ...Date 10 02 98 R761781 IR Receiver module R761781 1 SERVICE SHEET IRRECEPTION IRRECEPTION...
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