Hyundai HQL320WR Service Manual page 2

1 A/V Circuit BLOCK Diagram
1) PC Mode
PC inputs, R, G, B , H, and V signals, are entered through D-S ub 15pin
(DSUB1). They are en tered into the DTV/ PC sele ction switch, B A7657
(U30). When PC is se lected in M CU, the signals are entered into the AD
converter, AD 9883 (U21).
In AD9883, the signals are c onverted into 24 bits and entered into scaler
gm6015.
BA7657 selec ts PC when pin16 is high and selects DT V when pin 16 is low.
AD9883 is controlled using the SDA/SCL line of pin 57/ 56.
PC inpu t resolu tion is fh: 30~61k a nd fv: 56~75Hz, and the ma ximum
resolution is 1024x768 at 75Hz.
If the resolution is above the specifications, an out of range m essage is
displayed on the upper left hand corner of the screen. However, even if the
resolution is within the specified range, if the input timing is different from
the timing indicated on the manual, not supporded video, a message
can be displayed. The Geometry Adjust function, which is used to adjust the
picture position and size, should be carried out in the Windows desktop screen h.
or full cross hatc The D TV signals, 480p, 720p, and 1080i, from the set-top box
with a D-Sub out port, can be received through the D-Sub port and displayed
in the PC mode.
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