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1-10-4
E9KG0TR
Yes
Yes
Yes
Yes
No
No
No
No
FLOW CHART NO.15
The fluorescent display tube does not light up.
Is 5V voltage supplied to Pin(6, 24) of IC1571?
Is approximately -24V to -28V voltage supplied to
Pin(15) of IC1571?
Is there approximately 500kHz oscillation to
Pin(26) of IC1571?
Are the filament voltage applied between Pin(1)
and Pin(24) of the fluorescent display tube?
Also negative voltage applied between these pins
and GND?
Check the fluorescent display tube (FL1501),
and replace P1 (BOARD MCV) if defective.
Check the AL+5V line and replace P3 (BOARD
POWER SUPPLY) if defective.
Check the -FL line and replace P1 (BOARD MCV)
or P3 (BOARD POWER SUPPLY) if defective.
Check R1595, IC1571 and their periphery, and
replace P1 (BOARD MCV) if defective.
Check the power circuit, D1023, D1024, C1032,
C1033 and their periphery, and replace
P3 (BOARD POWER SUPPLY) if defective.
Summary of Contents for D-VR7KC
Page 4: ...1 1 1 E9KG0SP SPECIFICATIONS ...
Page 18: ...1 6 6 E9KG0DC Fig D10 22 Deck Pedestal 23 Front Bracket R S 25 S 25 S 25 S 25 S 26 ...
Page 66: ...1 13 12 TUNER Schematic Diagram E9KG0SCT NOTE BOARD MEANS PRINTED CIRCUIT BOARD ...
Page 77: ...1 13 23 BE9MG0F01031A BOARD TUNER Top View NOTE BOARD MEANS PRINTED CIRCUIT BOARD ...
Page 78: ...1 13 24 BOARD TUNER CBA Bottom View BE9MG0F01031A NOTE BOARD MEANS PRINTED CIRCUIT BOARD ...
Page 90: ...1 18 4 E9KG0PEX Packing Upper Side Lower Side X1 X22B X22A X20B X5 X3 X20A ...
Page 115: ......