Genius TVGO DVB-T02Q User manual

Service Manual

ServiceManual TVGoDVB-T02Q
2
TVGo DVB-T02Q
Version: 1.0
Contents
TVGo DVB-T02Q
Chapter 1. INTRODUCTION…………………………………………………………………….……3
a. Hardware
b. Operating System
c. Available hard disk space
d. Block Diagram
Chapter 2. Removal and Replacement……………………………………………………..…………....4
a. Remove label protector on .the reverse side………………………………..…………....……...4
b. Remove screws……………………………………………………………… …….……….......5
c. Open the case……………………………………………………………………. ………….….6
d. Remove PCB from case………………………………………………………..…………….…7
Chapter 3. Testing Procedures………………………………………………………………………......8
a. Testing flow chart…………………………………………………………………………….…8
b. Check USB Power………………………………………………………………………….…..10
c. Check System 2.5V………………………………… …………………………………….....11
d. Check System 3.3V…………………………………………………………………………….12
e. Check DVB 1.8V…………………………………………………………………………….…13
f. Check Tuner VDD 3.3V..……………………………………………………………………….14
g. Check X1 12MHz.……………….……………………………………………………………..15
h. Check X2 20.48MHz…………………………………………………………………………...17
i. Check U2 DVB Clock&DVB Data……………………………………………………………..19
j. Check Device on the Windows Device Manage………………………………………………..21
Chapter 4. Troubleshooting Guide………………………………………………………………………23
Chapter 5. Parts list……………………………………………...………………………………………24

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Chapter 1. INTRODUCTION
a. Hardware
 PC Pentium 4 2.0GHz above
※The real performance is based on CPU performance
 Connection port : USB2.0
b. Operating System
 Microsoft Windows 2000 SP4 or Windows XP SP1/SP2
c. Available hard disk space
 100MB used to install the driver and software
 Space needed for video recording requires 3GB per hour for DVD format data
d. Block Diagram
.
CIR Control
M9206
USB
Connector
MT352
USB
MPEG2
Transport
Stream
Crystal 12Mhz
USB SYSTEM
POWER
AIC1550
(PWM)
LTC3406
(PWM)
3.3V DVB
3.3V SYS
1N4148
(DIODE)
3.3V SYS2.5V SYS
3.3V DVB
1.8V DVB
MT2060
POWER Distribution
3.3V VDD
3.3V VDD
Antenna
Crystal 20.48Mhz
5V
1.8V DVB
2.5V SYS

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Chapter 2. Removal and Replacement
a. Remove label protector on the reverse side
Remove label
p
rotecto
r

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b. Remove screws
Remove screw

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c. Open the case

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d. Remove PCB from case

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Chapter 3. Testing Procedures
a. Testing flow chart
START
Check USB Power
4.5~5.5V CN2
Pin 1
A
Check U10 Pin 3
System 3.3V
Check D4 Pin2
2.5V
Check U5 Pin 8
1.8V
Check PC USB Port
Replace U10
Replace D4
Replace U5
T
T
T
T
F
F
F
F

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Check U2 Pin 61
DVB Clock
Check U2 Pin 49
DVB Data
Check X2 Pin 1
20.48MHz
A
Check X1 Pin 1
12MHz
Replace X1
Replace X2
Replace U2
Replace U2
T
T
T
T
T
F
F
F
F
END
F
Check U1 Pin 6,7
D-,D+
Replace U1
T

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b. Check USB Power
Check USB Power 4.5~5.5V CN2 Pin 1

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c. Check 2.5V
Check D4 Pin 2 2.5V

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d. Check System 3.3V
Check L19 Pin 2 3.3V

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e. Check DVB 1.8V
Check DVB 1.8V L13 Pin 2

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f. Check Tuner VDD
Check L12 Pin 2 VDD 3.3V

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g. Check X1 12MHz
Check U1 Pin
1
4
,
12MHz
Please check X1 frequency is
12MHz

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Replace X1 crystal

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h. Check X2 20.4MHz
Check U2 Pin 23 20.4MHz
Please check X2 frequency is
20.4MHz
U2

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Replace X2 crystal

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i. Check U2 DVB Clock & DVB Data
Check U2 Pin61 DVB Clock
Check Pin61 DVB Clock frequency must < 60MHz.
NOTE: Different country, The DVB clock will get
different frequency.
Check U2 Pin49 DVB Data
U2

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Re
p
lace U2
(
MT352
)
Check DVB Data
Note:if the level of the wave is always
low or high,it is to represent a fault of
the function.
U2