Hitachi CML155XW, Руководство по обслуживанию

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HITACHI CML155XW LCD Monitor Service Manual (v1.0) 18
BKLT_PWM is used as backlight brightness control. BKLT_EN controls the
backlight’s on/off. And LCD_ON/OFF is used for turning on or off the LCD panel.
(6) Power
Refer to circuit diagram titled ‘POWER’ in Appendix B.
The DC +12V output of AC adapter is fed into the monitor through P002. This supply is
regulated by I009 and I012 to p5V for the whole system. And the +5V supply is
fed into I016, I005, I007, and I008 to provide multiple 3.3V and 2.5V supplies. The +12V
also is fed into I001 to provide 5.0V independen
t for video decoder chip.
6.2 Audio Board Circuit
The circuit diagrams of audio board circuit is shown in Appendix C.
6.3 Keyboard Circuit
The circuit diagrams of keyboard circuit is shown in Appendix D.
6.4 Inverter Circuit
The circuit diagrams of inverter is shown in Appendix E. The inverter supplies power for
backlight for the LCD panel.