Service Manual
Chapter 3. Troubleshooting Guide
Problems Probable
Reasons
Solutions
1. No link or link
L.E.D. Unlight
1. PCB
defect
1. Replace
U5-U8
2. Replace
U1
3. Replace
U9
4. Replace
U10
5. Replace
Y1
2. Connection
fail
1. PCB
defect
1. Replace
U5-U8
2. Replace
T2
3. Replace
U3
4. Replace
U2
3. No power
1.power supply defect
1.Replace power supply
Version 1.0
Page 17
Summary of Contents for GS4160R
Page 1: ...Service Manual GS4160R SWITCH HUB ...
Page 5: ...Service Manual CHECK JPP 1 5V JPP 1 5V Version 1 0 Page 4 ...
Page 6: ...Service Manual CHECK JPP 2 3 3V JPP 2 3 3V Version 1 0 Page 5 ...
Page 7: ...Service Manual CHECK JPP 3 3 3V JPP 3 3 3V Version 1 0 Page 6 ...
Page 9: ...Service Manual CHECK Y1 50Mhz Version 1 0 Page 8 ...
Page 10: ...Service Manual CHECK U9 7 LD1 SIGNAL U9 7 Version 1 0 Page 9 ...
Page 11: ...Service Manual CHECK U1 3 3 3V U1 3 Version 1 0 Page 10 ...
Page 12: ...Service Manual CHECK U1 1 1 8V U1 1 Version 1 0 Page 11 ...
Page 13: ...Service Manual CHECK U10 4 UPRX SIGNAL U10 4 Version 1 0 Page 12 ...
Page 15: ...Service Manual CHECK T2 16 UPTX SIGNAL T2 16 Version 1 0 Page 14 ...
Page 16: ...Service Manual CHECK U3 4 RESET SIGNAL U3 4 Version 1 0 Page 15 ...
Page 17: ...Service Manual CHECK U2 4 50Mhz U2 4 Version 1 0 Page 16 ...