Gateway 46” PTV Service Training
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Service Training of 46” PTV
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PDP Whole Components
••MODULE
MODULE
There are
There are
1
1
pc.
pc.
panel
panel
and
and
10
10
pc.s
pc.s
PCB
PCB
including
including
2
2
pc.s
pc.s
X/Y Sustainer board
X/Y Sustainer board
、
、
4
4
pc.s
pc.s
X/Y extension board
X/Y extension board
、
、
2
2
pc.s
pc.s
W PCB
W PCB
、
、
1
1
pc.
pc.
DIF
DIF
and
and
1
1
pc.
pc.
Power board in the Module.
Power board in the Module.
••SET
SET
There are
There are 11
pc. Surface Filter and 9 pc.s PCBs
pc. Surface Filter and 9 pc.s PCBs
including 1 pc. Audio board
including 1 pc. Audio board
、
、1 1
pc. VIF board
pc. VIF board
、
、1 1
pc.
pc.
Power Line Filter
Power Line Filter
、
、1 1
pc. Keypad board
pc. Keypad board
、
、1 1
pc.
pc.
Receiver board
Receiver board
、
、2 2
pc.s L/R Speakers and 1 pc.
pc.s L/R Speakers and 1 pc.
Video board ,1 pc. Tuner board in the SET.
Video board ,1 pc. Tuner board in the SET.
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Easy maintenance of Plasma Display
Parts position
Y- FPC
Extension
board
(upper and
lower)
Tuner
DIF Board
Audio Board
X-Sustainer
X- FPC
Extension
board(upper
and lower)
Speaker
Speaker
W- FPC Extension board
(left and right)
Ac Line filter
VIF
Y-Sustainer
Power Supply
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Easy maintenance of Plasma Display
Block diagram of system
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Easy maintenance of Plasma Display
PCB function
1.Power：(1).Input voltage:AC 110V〜240V、47Hz〜63Hz.
Input range:90V(Min)〜265V(Max) auto regulation.
(2).To provide power for PCBs.
2.VIF(Video InterFace)：To converter TV signals, S signals、AV signals、PC signals
and D-SUB signals to digital ones and to transmit to DIF.
3.DIF(Digital InterFace)：Dealing with the digital signal for output to panel.
4.X-Sustainer / Y-Sustainer：(1). Receiving the signals from DIF and high
voltage supply.
(2). Output scanning waveform for Module.
5.X / Y-FPC extension board：Receive signal from X / Y sustainer, output
horizontal scanning waveform to the panel.
6.W-COF extension board： Output addressing signals.
7.Audio Board：Amplifying the audio signal to the internal or external
speakers of which selected.
8.TV tuner board : To convert TV RF signal to video and audio signal to VIF board.
Audio output to the Audio board.
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Easy maintenance of Plasma Display
Basic operation of Plasma Display
1. After turning on power switch, power board sends Vsby +5V Volt to Micro Processor
IC waiting for ON signals from Key Switch or Remote Receiver.
2. When the ON signal from Key Switch or Remote Receiver is detected，Micro
Processor will send ON Control signals to Power. Then Power sends volts(Vs、Vxg、
Vw、Vf、Vdd、Vcc and +9V)to PCBs working. This time VIF will send signals to
display back light 、OSD on the panel and start to search available signal sources. If
the audio signals input，them will be amplified by Audio AMP and transmitted to
Speakers.
3. If some abnormal signals are detected（for example:over volts、over current、over
temperature and under volts），the system will be shut down by Power off.
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VIF Board
VIF System Structure
ADC
Converter
TMDS
Receiver
De_
Interlace
Video
Decoder
Scalar
Chip
Output
to DIF
D-SUB
DVI
Y/Cb/Cr
Micro_Controller
Composite
S-Video
Tuner
First To a 3D Y/C
separating IC
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VIF System Block Diagram
ADC Converter : AD9888 KS
The AD9888 is a complete 8 bit , 205 MSPS monolithic analog
interface optimized for capturing RGB graphics signals. Its 205 MSPS
encode rate capability and full-power analog bandwidth of 500 MHz
supports resolutions up to UXGA(1600 x1200 @ 75 Hz).
TMDS Receiver: SIL151ACT100
The Sil153BCT100 receiver uses Panel Link Digital technology to
support high resolution displays up to SXGA(25MHz~112MHz) . The Sil153B
receiver supports up to true color panels (24 bit/pixel, 16.7M colors) in 1 or
2 pixels/clock mode. In addition , the receiver data output is time staggered
to reduce ground bounce that affects EMI.
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VIF System Block Diagram
VIDEO Decoder:SAA7118E
The SAA7118E decoder is a ADC, too. But it can deal with the ordinary TV
signals. The SAA7118E can be input Composite 、S-video 、Component
signals and its outputs are digital Y(Luminance) , C(Chromaticity) signals.
And it also can adjust brightness , contrast , saturation , hue .
De-interlace:SIL504CM208
The Sil504 transfer interlacing signals into progressive signals. The
advantage of progressive signals is that the scanning rate doubling to let the
screen more stable and non-flickering. Besides, the sources of input may have
24 0r 30 or 25 frames per sec, so the de-interlaced chip shall tell from the
differences and processing the signals. The basic function of de-interlaced IC
is to combine the odd and even sub-frames to a frame , and the processing
needs a memory IC(SDRAM) to store these signals for processing . For the
improving the quality of image sake , more and more TVs or DVD players all
have the functions of progressive scanning.
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VIF System Block Diagram
Image Processor Chip:PW171-20U(system on chip)
Image Processor chip:
PW171-20U(system on chip)
◎ Scaling function :
The Image scalars provide high quality up and down image scaling . For the applications of
VIF , the input signals could be VGA , SVGA , XGA formats , and its output fixed at 852 x 480
@60 HZ . For example , SVGA format:800 x 600 @75Hz , first scaling down : Horizontal
800Î640、Vertical 600Î480 , 75 frames / sec after frame rate conversion become 60 frames per
sec. Then scaling up 640Î852 , to accomplish the scaling function.
◎ Micro Processor Function :
This chip includes microprocessor(on-chip 80x86) ; selectable function and I/O interface control .
With 3 groups of 8-bit programmable I/O , 1 group of RS-232 communication port , IR decoder
,timer and a PWM generator
◎ OSD Function :
The on-screen-display(OSD) can be used for startup screens , menus , and
scribble functions
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DIF Board
DIF Structure
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Three Functions of DIF :
(1)Image Signals Processing
Transfer image signal into R、G、B signal respectively and according to the
characteristic of a frame needed to process and adjust the signal.
(2)Waveform Controlling
This function is accomplished by IC106, it generate the controlling
waveform signals of X,Y sustainer
(3)Power Controlling
The functions of APC (auto power control) are important to
panel ; if APC were abnormal, it may cause power failure or
even panel broken
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APC Function
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APC
APC
Function
Function
After image data is transmitted to APC by signals processing unit，the Calculate Display
Ratio begins to calculate the ratio of pattern. After checking and calculating pattern(A ,B ,
C) , the numbers of pattern , then sending the data of display and switching count to the
window memory . .
The APC is performing mathematical calculations , by reducing the sustain frequency and
closing some sub-fields to accomplish. There is reference for judgment. The relative
parameters has been tested by experiments to determine, so if the parameters of APC are
not the optimal parameter , it may cause panel broken , scan IC burned , power supply
failure. 。
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Power Board
Power Board Layout
VS VCC VF
VW
VXG
VSB
VAU
Volts settings position
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Power Output Spec.
Name Output Max Load Peak load
Vsb 5V 1.0A
Vdd 5V 2.0A
Vcc 5V 3.0A
Vau 9V 2.0A
Vfan 12V 0.5A
Vf 15V 0.6A
Vs 170V 290W 50A
Vw 65V 80W 6A
Vxg -160V 0.1A 1A
Vaux 380V 65W
cancelled
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X Sustainer
X – Sustainer Layout
PX1:VF,VW,VS
input
PX2:VXG,VCC
input
J302:X – L output
J301:X –U output
J1:X - input
J3: W - Vw 65V input
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X – Sustainer Power Spec.
Input item
Input
volt(VDC)
Input
current(mA)
Remark
Vcc 5 240
Vf 15 70
(Full white)
Normal range:40~150mA
Vs 170 1.2A Normal range:1.0~1.5A
Vxg -160 40
Vw 65 40
Vs 170 1.2A Normal range:1.0~1.5A
Vxg -160 40
Vw 65 40
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