Working Theorem - Iiyama PLE1700S Service Manual

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PLE1700S Service Manual

7. WORKING THEOREM

A. DC-DC CONVERTER
This brick convert is the 110-220AC input voltage to 12V AND 3.3V output for invert use and
panel use and system controller use .
3.3V Out put at L804
VCC 12V In put at L803,F901
B. Scaling controller
The ADC is to convert RGB analog signal to digital signal that scaling chip can acknowledge.
The HSYNC input receives a logic signal and provides the frequency reference for pixel clock
generation.
The scaling IC is to converts the input signal ranging from VGA to SXGA into SXGA resolution
that panel can acknowledge.
GENERAL DESCRIPTION
The TSUM57AK is total solution graphics processing IC for LCD monitors with panel resolutions
up to SXGA.It is configured with a high-speed integrated triple-ADC/PLL, a high quality display
processing engine, and an integrated output display interface that can support RSDS panel
interface format.To further reduce system costs, the TSUM57AK also integrates intelligent power
management control capability for green-mode requirements and spread-spectrum support for EMI
management.
The TSUM57AK incorporates the world's first coherent oversampled RGB graphics ADC in a
monitor controller system.The oversampling ADC samples the input RGB signals at a frequency
that is much higher than the signal source pixel rate. This can preserve details in the video signal
that ordinarily would be lost due to input signal jitter or bandwidth limitations in non-oversampled
systems. The TSUM57AK also incorporates a new Dynamic Frame Rate (DFR) generator for
the digital output video to the display panel that preserves the advantages of a fixed output clock
rate, while eliminating the output end of frame short-line.
PIN DESCRIPTION
Analog Interface
Pin Name Pin Type
HSYNC0 Schmitt Trigger Input
w/ 5V-tolerant
VSYNC0 Schmitt Trigger Input
w/ 5V-tolerant
REFP
REFM
RIN0P Analog Input
RIN0M Analog Input
SOGIN0 Analog Input
GIN0P Analog Input
GIN0M Analog Input
BIN0P Analog Input
BIN0M Analog Input
REXT
DVI Interface
Pin Name Pin Type
R+ Input
R- Input
G+ Input
G- Input
B+ Input
B- Input
Function
Analog HSYNC input
Analog VSYNC input
Internal ADC top de-coupling pin
Internal ADC bottom de-coupling pin
Analog red input
Reference ground for analog red input
Sync-on-green input
Analog green input
Reference ground for analog green input
Analog blue input
Reference ground for analog blue input
External resistor 390 ohm to AVDD_DVI
Function
DVI Input Channel + RED
DVI Input Channel – RED
DVI Input Channel + GREEN
DVI Input Channel – GREEN
DVI Input Channel + BLUE
DVI Input Channel – BLUE
-16-
Pin
63
64
62
61
59
58
57
56
55
54
53
51
Pin
39
40
42
43
45
46
05/12/2006