Service Manual
Chapter 3. Troubleshooting Guide
Problems Condition
Probable
Reasons
Solutions
1. Blank Screen 1. Sound only, no picture. 1. Parts failure.
Change all the parts
below
1. X2
2. REG5
3. U1
2. Buttons don’t
work
1. Buttons malfunction.
1. Micro SW NG
1.Change Micro SW
3. incorrect color
display
1. VGA output malfunction. 1. Parts failure.
1.Change U15
4. LED no lit
1. no power.
1.LED failure
1.Change LED
5. Remote not
functions
1. Remote control
malfunction.
1.IR1 failure
1. .Change IR1
6. No TV image 1. Display malfunction. 1.TDA8275
NG 1.Change
Y301
7. Black & white
image only
1. Only black and white
color in TV,AV,SVHS
modes.
1.X’TAL NG
1.Change X2
8. No display in
AV,SVHS
modes
1. No display in AV,SVHS
modes.
2. display correctly in TV
mode.
1.SAA 7135 NG
1.Change U5
9. PIP MODE
malfunction
1. The desktop can not
work in PIP MODE
1.X’TAL NG
1.Change X1
Version 1.0
Page 15
Summary of Contents for TVB-S201 PRO
Page 1: ...Service Manual TVB S201 PRO ...
Page 6: ...Service Manual b Check VCC 5V L34 PIN1 Version 1 0 Page 5 ...
Page 7: ...Service Manual c Check REG2 Pin 2 Signal REG2 PIN 2 Version 1 0 Page 6 ...
Page 8: ...Service Manual d Check REG5 Pin 2 Signal REG5 PIN2 Version 1 0 Page 7 ...
Page 9: ...Service Manual e Check REG3 Pin 2 Signal REG3 PIN2 Version 1 0 Page 8 ...
Page 10: ...Service Manual f Check REG4 Pin 2 Signal REG4 PIN2 Version 1 0 Page 9 ...
Page 11: ...Service Manual g Check X1 U22 Pin 26 X TAL Signal U22 PIN26 Version 1 0 Page 10 ...
Page 13: ...Service Manual i Check Y301 X TAL Signal C322 PIN1 Version 1 0 Page 12 ...
Page 14: ...Service Manual j Check U1 CLK_SAA Signal U1 PIN58 U5 PIN66 Version 1 0 Page 13 ...
Page 15: ...Service Manual k Check U1 RAM_CLK Signal U1 PIN136 Version 1 0 Page 14 ...