Hyundai PD421, Svc Manual

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Plasma Display PD421
2. A/V Circuit BLOCK Diagram
1) PC Mode
P C 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
(UA01). When PC is selected in M CU, the signals are entered into the AD
converter, AD 9883 (UA02).
In AD9883, the signals are c onverted into 24 bits and entered into scaler
ASI500.
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: 30~70k a nd fv: 50~85Hz, and the ma ximum
resolution is 1080x768 at 85Hz.
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, a ‘ not found vesa o r out of range’
message can be displayed. Ple ase check the timing to identify the c ause of
the ‘ out of range’ message.
PC input sync can rece ive H/V composite or separate, but if DPMS ON is
selected in the PDP menu, DPM S cannot o perate in composite and c an
operate only in separate sync.
The Auto Adjust function, which is used to adjust the picture position and
size, should be carried out in the Windows desktop screen or full cross hatch.
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.
DVI Mode
Signals entering through the DVI port (D V101) are converted to 24bits in
the TMDS Rec eiver, SIL161B (UT02 ), and entered in scalar ASI500.
SIL161B is an output port and is activated when pin number 2 is high.
DTV signa ls 480p, 720p, and 1080i can be displayed through the DVI port .
However, PD421 cannot only display 60Hz DTV signals. It is unable to
display 50Hz DTV signals. PC can support both 50Hz and 60Hz signals.
The resolution of DVI Mode is the same as the PC Mode.