Genius VideoWonder DVB-T User manual

Service Manual
VideoWonder DVB-T

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
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Service Manual
Chapter 1. INTRODUCTION
a. Hardware
PIII 800 MHZ or higher above
256M RAM
b. Software
Win2000 / XP above
c. Block Diagram
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Service Manual
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

Service Manual
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
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b. Check U7Pin1 +5V
U7 PIN 1
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Service Manual
c. Check U6 Pin2 +3.3V
U6 PIN 2
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d. Check X3 CLKIN signal (16MHZ)
C22
Page7

Service Manual
e. Check 16M CLKOUT signal(16MHZ)
C21
Page8

Service Manual
f.Check X1 CLKIN signal(24.576MHZ)
R21
Page9

Service Manual
g.Check X2CLKIN signal(4MHZ)
R38
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h.Check U4 +3.3V
C50
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i.Check U1 +3.3V
C3
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j.Check U8 +5V
C87
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Service Manual
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
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Service Manual
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 !
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Service Manual
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
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Service Manual
Chapter 6. Tools
1. Oscilloscope
2. Soldering-iron set
Page17