Genius VideoWonder DVB-T User manual

Service Manual
VideoWonder DVB-T
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Service Manual
Table of Contents
Video Wonder DVB-T `0
Chapter 1. INTRODUCTION 2
a.Hardware 2
b.Software 2
c.BlockDiagram 2
Chapter 2. Testing Procedures 3
a.Testing flow chart 3
b.Check VCC +5V 5
cCheck VCC +3.3V 6
d.Check 16MHZ CLKIN signal(X3) 7
eCheck 16MHZ CLKOUT signal (X3) 8
fCheck 24.576MHZ CLKIN signal(X1) 9
gCheck 4MHZ CLKIN signal(X2) 10
hCheck U4 +3.3V 11
iCheck U1 +3.3V 12
jCheck U8 +5V 13
Chapter 3. Troubleshooting Guide 14
Chapter 4. Removal and Reqlacement 15
Chapter 5. Parts list 16
Chapter6. Tools 17
Page1
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Chapter 1. INTRODUCTION
a. Hardware
PIII 800 MHZ or higher above
256M RAM
b. Software
Win2000 / XP above
c. Block Diagram
Page2
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Chapter 2. Testing Procedures
a. Testing flow chart
Page3
REPLACE U7
REPLACE U6
REPLACE X3(C22)
REPLACE X3(C21)
START
Chcek VCC
+5V
Chcek VCC
+3.3V
Chcek 16MHZ
CLKIN
Chcek 16MHZ
CLKOUT
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REPLACE U4(C50)
REPLACE X2(R38)
REPLACE X1(R21)
Chcek
24.576MHZ
CL
K
Chcek 4MHZ
CLK
Chcek +3.3V
Chcek +3.3V
REPLACE U1(C3)
Chcek 3.3V REPLACE U8(C87)
END
Page4
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b. Check U7Pin1 +5V
U7 PIN 1
Page5
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c. Check U6 Pin2 +3.3V
U6 PIN 2
Page6
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d. Check X3 CLKIN signal (16MHZ)
C22
Page7
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e. Check 16M CLKOUT signal(16MHZ)
C21
Page8
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f.Check X1 CLKIN signal(24.576MHZ)
R21
Page9
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g.Check X2CLKIN signal(4MHZ)
R38
Page10
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h.Check U4 +3.3V
C50
Page11
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i.Check U1 +3.3V
C3
Page12
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j.Check U8 +5V
C87
Page13
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Chapter3. Troubleshooting Guide
Problems Condition
Probable
Reasons Solutions
1.No Image No image
1.Component
damage
Change all the patrs
below
No voice 1.U1 7.X3
2.U4
3.U6
4.U7
5.X1
6.X2
2.No Remote No Power Remote IC Fail Change U8
Page14
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Chapter 4. Removal and Replacement
Step Description Pictuer
1. finished products TV card diagram ( before
plug in any video cable )
2. TV Cable Plug in the TV cable , first.
3. AV/SV Cable Then, plug in the AV/SV
Cable .
4. Remote Cable Lastly, plug in the remote
cable !
Page15
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Chapter 5. Parts list
Description Parts number Description Parts numbe
U1(8274) 102100827400
X1(24.576MHZ)
201512457601
U4(7134) 102100713400 X2(4MHZ) 201510400001
U6(FS8860) 101900886000 X3(16MHZ) 201511600000
U7(FS8860) 101900886000
U8(MDT2005ES)
101900200500
Page16
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Chapter 6. Tools
1. Oscilloscope
2. Soldering-iron set
Page17
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