Genius TVB-S201 PRO User Manual
Service Manual
TVB-S201 PRO
Service Manual
P
Table of Contents
TVB-S201 PRO ...........................................................................................................................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 REG2 Pin 2 Signal........................................................................................................6
d. Check REG5 Pin 2 Signal........................................................................................................7
e. Check REG3 Pin 2 Signal........................................................................................................8
f. Check REG4 Pin 2 Signal.........................................................................................................9
g. Check X1,U22 Pin 26 X’TAL Signal.....................................................................................10
h. Check X2 Pin 3,U5 Pin 62,U1 Pin 41 OSC Signal................................................................11
i. Check Y301 X’TAL Signal.....................................................................................................12
j. Check U1 CLK_SAA Signal ..................................................................................................13
k. Check U1 RAM_CLK Signal................................................................................................14
Chapter 3. Troubleshooting Guide..................................................................................................15
Chapter 4. Removal and Replacement............................................................................................16
Chapter 5. Parts list.........................................................................................................................17
Chapter 6. Tools..............................................................................................................................17
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Chapter 1. INTRODUCTION
a. Hardware
♦ PC586 above
♦ Connection port ： VGA
b. Software
♦ Win98 above
c. Block Diagram
TV VGA VGA
(Silicon Tuner) IN OUT
S-Video
Video PIP select Module
SAA-7135 processor
STV-108A
PIP
Composite & Selector
Audio Line in
Audio Switch MCU + OSD
Audio Amplifie SDRAM SM-602
2
I C BUS
Audio Selector
PC audio line in Audio out EEPROM Button input
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Chapter 2. Testing Procedures
a. Testing flow chart
START
Check VCC
+5V
F
REPLACE ADAPTER
T
F
Check REG2
Pin 2 +3.3V
REPLACE REG2
T
F
Check REG5
Pin 2 +2.5V
REPLACE REG5
T
F
Check REG3
Pin 2 +3.3V
REPLACE REG3
T
F
Check REG4
Pin 2 +1.8V
REPLACE REG4
T
A
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A
T
Check X1
X’TAL signal
F
REPLACE X1,U22
T
Check X2
OSC signal
F
REPLACE X2,U5,U1
T
Check Y301
X’TAL signal
F
REPLACE Y301,U301
T
Check U1
CLK signal
T
END
F
REPLACE U1
Version 1.0
age 4
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b. Check VCC +5V
L34 PIN1
Version 1.0
age 5
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