Circuit Description; Micro-Controller Circuit; Circuit Of Plug And Play; System Clock - Hitachi CML152XW2 Service Manual

8. CIRCUIT DESCRPTION
A. Micro-Controller Circuit
The U5 (for VL-547 ) or U3 ( for VL-542 ) (s9050-100) is a system controller.
The Y1 is 14.318MHz XTAL.
B. Circuit of Plug and Play
Plug and play allows the serial communication of host PC and peripherals offering minimal
configurations to end users. This monitor supports DDC2B communication protocal.
SDATA and VCLK are input to U4 (for VL-547 ) or U2 ( for VL-542 ) (24LC21A).
C. System Clock
The Y1 (14.318MHz XTAL) supports U5 (for VL-547 ) or U3 ( for VL-542 ) (Sage) reference
clock.
D. Image Engine (Zoom)
The U5 (for VL-547 ) or U3 ( for VL-542 ) (Sage) is a image engine that have following
functions.
(1) The Sage is a IFM ( Input Format Measurement )
(2) The Sage is both a high quality scalar and timing controller chip.
E. Power Regulator
(1) The U12 (for VL-547 ) or U10 ( for VL-542 ) (APL117) is 1A linear regulator that
transfer input voltage from 5V to 3.3V supports U5.
(2) The U13 (for VL-547 ) or U11 ( for VL-542 ) (AIC1084) is 5A linear regulator that
transfer voltage from 5V to 3.3V supports U17 and Panel Vcc.
(3) The U14 (for VL-547 ) or U12 ( for VL-542 ) (APL1117) is 1A linear regulator that
transfer voltage from 5V to 2.5V.
(4) The U15 (for VL-547 ) or U13 ( for VL-542 ) (APL1117) is 1A linear regulator that
transfer voltage from 5V to 2.5V.
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