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...
Disassembling information 1. Use two “-” screwdrivers. Push screwdrivers in case cavities. 2. Rotate screwdriver and pull both case parts. Disassembling information...
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3. Remove rubber bushing 4. Push back Plastic PCB holders and take out the board.
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...
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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...
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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...
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...
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...
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...
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2. RF components location on RouterBoard S700 S701 U700 U701 Q700 Q701 F700 F701 U100 Y700 WiFi does not work...