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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.
Block Diagram
2
Chapter 2. Testing Procedures
3
a
.Testing flow chart
3
b.
Check VCC +5V
5
c
Check VCC +3.3V
6
d.
Check 16MHZ CLKIN signal(X3)
7
e
Check 16MHZ CLKOUT signal (X3)
8
f
Check 24.576MHZ CLKIN signal(X1)
9
g
Check 4MHZ CLKIN signal(X2)
10
h
Check U4 +3.3V
11
i
Check U1 +3.3V
12
j
Check U8 +5V
13
Chapter 3. Troubleshooting Guide
14
Chapter 4. Removal and Reqlacement
15
Chapter 5. Parts list
16
Chapter6. Tools
17
Page1
Service Manual
Chapter 1. INTRODUCTION
a. Hardware
PIII 800 MHZ or higher above
256M RAM
b. Software
Win2000 / XP above
c. Block
Diagram
Page2
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
CLK
Chcek 4MHZ
CLK
Chcek +3.3V
Chcek +3.3V
REPLACE U1(C3)
Chcek 3.3V
REPLACE U8(C87)
END
Page4
Service Manual
b. Check U7Pin1 +5V
U7 PIN 1
Page5
Service Manual
c. Check U6 Pin2 +3.3V
U6 PIN 2
Page6
Service Manual
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
Page10
Service Manual
h.Check U4 +3.3V
C50
Page11
Service Manual
i.Check U1 +3.3V
C3
Page12
Service Manual
j.Check U8 +5V
C87
Page13
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
Page14
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 !
Page15
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
Page16
Service Manual
Chapter 6. Tools
1. Oscilloscope
2. Soldering-iron
set
Page17