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Repair instruction
RBSXTG-5HPnD
Published June 8, 2015

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Summary of Contents for MikroTik RBSXTG-5HPnD Series

  • Page 1 Repair instruction RBSXTG-5HPnD Published June 8, 2015...
  • Page 2: Table Of Contents

    These repair instructions are for NON WARRANTY repairs only! Please make visual inspection for signs of corrosion or mechanical damages before starting. Contents List of RBSXTG-5HPnD series....................3 Disassembling information....................4 Routerboard does not power on..................6 Routerboard does not boot....................10 Ethernet port does not work.....................12 Voltage and temperatur monitor does not work.............13...
  • Page 3: List Of Rbsxtg-5Hpnd Series

    List of Cloud Router Switch SXT 5 series SXT HG5 SXT SA5 List of Cloud Router Switch SXT 5 series...
  • Page 4: Disassembling Information

    Disassembling information 1. Use two “-” screwdrivers. Push screwdrivers in case cavities. 2. Rotate screwdriver and pull both case parts. Disassembling information...
  • Page 5 3. Remove rubber bushing 4. Push back Plastic PCB holders and take out the board.
  • Page 6: Routerboard Does Not Power On

    Routerboard does not power on There no signs of any LED, LCD or buzzer activity Find potential problem area RouterBOARD does not turn on when one of the power is disconnected. Check Which voltage is switched off, Power IN ( 10 – 28V) , 3.3V or 5V. Power IN 3.3V Routerboard does not power on...
  • Page 7 If Power_IN Failed 1. No power on 10-28V input Check for 10-28V output on C27 Try to use different PSU adapter Not OK Problem solved Measure if there is no short between GND and C27 “+” pin Short No short Change C27, C428 Measure Voltage on Q1 pin 1-3...
  • Page 8 2. No Voltage on 3.3V output Check for 3.3V output on L1 Measure if there is no short between GND and L1 No short Short Measure L1 resistance Change C8 <1 Ohm >1 Ohm Change L1 Measure resistance on R2 (26.1k Ohms) and R3 (10k Ohms) Not OK Change U1...
  • Page 9 4. Supply voltage components location on RouterBOARD TRF401 D404; D428 D405 5. Supply voltage Components table Reference Manufacturer code Description Manufacturer MG035M331G13PKKKS00R Capacitor elec 330uF 20% 35V 10x13 TH P=5 6000h 1.36A 0.043Ohm MG-series KUAN KUN ELECTRONIC ENTERPRISE CO., LTD. (Su-scon) C8, C42 UCW0J471MNL1GS Capacitor elec 470uF 20% 6.3V 8x10 SMD 7000h 600mA CW-series...
  • Page 10: Routerboard Does Not Boot

    Routerboard does not boot If Netinstall can see the board, but can not install it 1. Troubleshooting flow chart Measure inductor L103 resistance <1 >1 Change defective Check 1.8V output on L103 transistor Q200 pin2 1.8V Measure ferrite bead Change Q200 FB200 resistance >1 <1...
  • Page 11 2. Components location on RouterBOARD Y700 U100 L103 U300 R303..R312 Q200 U200 U300 3. Components table Reference Manufacturer code Description Manufacturer FB200 CB03YTYH330 Ferrite Bead 33 Ohm 3A 0603 Viking Tech Corporation L103 BCRH2D18B/HP-2R2N-NL Inductor 2.2uH 30% 1.48A 3.2x3.2x2 RoHS Bao Cheng Electronics Co.,Ltd., Q200 DXT2907A-13...
  • Page 12: Ethernet Port Does Not Work

    Ethernet port does not work No link on Ethernet port 1. Troubleshooting flow chart Measure inductors L400, FB400, FB401 resistance >1 <1 Change ESD protection Change faulty diodes D401, D402 inductor Problem still appears Change TRF401 Problem still appears Change 25MHz crystal Y400 Problem still appears Change Ethernet Phy U400...
  • Page 13: Voltage And Temperatur Monitor Does Not Work

    2. Ethernet port components location on RouterBOARD FB400 L400 U400 Y400 U100 FB401 D401 D402 TRF401 3. Ethernet port components table Reference Manufacturer code Description Manufacturer D401, D402 AOZ8808DI-05 Diode Array TVS 4 channel low cap DFN-10 Alpha & Omega FB400, FB401 CB03YTYH121 Ferrite Bead 120 Ohm 2.5A 0603 Viking Tech Corporation...
  • Page 14: Usb Does Not Work

    2. Voltage and temperature monitor components table Reference Manufacturer code Description Manufacturer R957 RC0402FR-0768KL Resistor 68k 1% 0402 Yageo Corporation R958 RC0402FR-074K7L Resistor 4.7k 1% 0402 Yageo Corporation U902 ZT2046Q Touch screen controller Serial 4-wire Internal reference QFN-16 ZillTek Technology Corp USB does not work 1.
  • Page 15 3. USB, voltage and temperature monitor components location on RouterBOARD U902 R958 R604, R605 R606, R607 Q601 Q600 R957 USB does not work...
  • Page 16: Wifi Does Not Work

    WiFi does not work Weak transmit power 1. Troubleshooting flow chart Check 5V output on C717 Change U700, U701 Measure FB700 resistance Problem still <1 >1 appears Change S700, S701 Change L717 Change FB700 Problem still appears Change F700, F701 Problem still appears Change Y700...
  • Page 17 2. RF components location on RouterBoard S700 S701 U700 U701 Q700 Q701 F700 F701 U100 Y700 WiFi does not work...

This manual is also suitable for:

Sxt 5 seriesSxt hg5Sxt sa5