NO
YES
NO
YES
NO
YES
NO
YES
[BACKLIGHT FOR LCD UNIT]
When one side does not light, either the upper part or the lower part gets dark.
When both sides do not light, no picture is seen.
Contact your authorized dealers when replacing the backlights.
-19-
S-1800M10
Screen gets bright, but nothing appears
POWER SUPPLY PCB
Verify that 5 volt is present in Main
PCB for Monitor portion.
Verify there is RGB OUTPUT
at J15 in Main PCB normal.
RGB:
R2〜R5
G2〜G5
B2〜B5
LCD UNIT
MAIN PCB
S-1800M10
Screen doesn't change into bright, even if the brightness dial is turned.
Verify if the voltage changes at
J2-No.2 in Control PCB when
the brightness dial is turned.
Change brightness volume.
Verify if the voltage changes at
J5-No.3 in Main PCB when the
brightness dial is turned.
Disconnection in Main PCB
LCD UNIT
(INVERTER)
(BACKLIGHT)
Summary of Contents for S-1800H80/180
Page 44: ...N o 6 8 8 A...
Page 46: ......
Page 48: ......
Page 50: ...NO 748 H SYNC CH1 J15 3pin GND V SYNC CH2 J15 4pin GND...
Page 53: ......
Page 55: ...NO 654 FRQ CH1 FRQ GND P...
Page 64: ......
Page 67: ......
Page 69: ......
Page 70: ...180kHz HULL UNIT CIRCUIT DIAGRAM WAVE FORMS 180 kHz...
Page 73: ......
Page 75: ......
Page 81: ...70V...
Page 83: ...NO 703 CH1 FRQ GND P...
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Page 117: ......
Page 118: ......
Page 119: ...HULL UNIT ASSEMBLY DRAWING...