Repair instruction. RB wap2nd
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1 Repair instruction RB wap2nd Published November 5, 2015
2 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 RB wap series...3 Disassembling information...4 Routerboard does not power on...5 Routerboard does not boot...8 Ethernet port does not work...10 WiFi does not work Latest Checking procedure for over-voltage damage available at
3 List of RouterBoard wap series wap wap ac List of RouterBoard wap series 3
4 Disassembling information 1. Unscrwew the screw with torx allen key. 2. Remove cover and unscrew both screws. 3. Pull back front cover and slide out board. 4 Disassembling information
5 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 (8 57V), 3.3V. 3.3V Power IN GND Routerboard does not power on 5
6 If Power_IN Failed 1. No power on 8-57V input Check for 8-57V output on C130 Try to use different PSU adapter Not OK OK Problem solved Measure if there is no short between GND and C130 + pin Short No short Measure voltage on Q10 pin2 8-57V Measure voltage drop over D13, D14, D4, D5 <0.7V Change U7 >0.7V Change faulty diode Change Q11 0V Measure Voltage drop over D1, D2 <0.7V Change Q10 >0.7V Change D1 Change Q11 6 Routerboard does not power on
7 2. No Voltage on 3.3V output Check for 3.3V output on L2 Measure if there is no short between GND and C125 + pin Short No short Measure L2, FB4 resistance <1 Ohm Measure voltage Drop ower D12 Change C125 >1 Ohm Change faulty inductor >0.7 V <0.7 V Change U6 Change D12 4. Supply voltage components location on RouterBOARD L2 D12 C130 U6 C125 D1 D2 Q10 U7 FB4 D13 Q11 D14 D4 D5 Routerboard does not power on 7
8 5. Supply voltage Components table Reference Manufacturer code Description Manufacturer C125 MP6RL220MC6 Capacitor PolymerAl 220uF 20% 6.3V 6.3x6 TH P= h 3.16A 15mOhm Matsuki Polymer Technology CO., LTD. C130 D1, D2, D4, D12 D5 HF063M101G13P787C35R Capacitor elec 100uF 20% 63V 10x13 TH P=5 5000h 0.55A 0.25Ohm HF-series 105C KUAN KUN ELECTRONIC ENTERPRISE CO., LTD. (Su-scon) B2100AF Diode Schottky 100V 2A SMA Lite-On Semiconductor corporation HD02 0.8A 200V Rectifier Bridge Lite-On Semiconductor corporation D13 BZX84C12-7-F Diode Zener BZX84C 12V 6% 350mW SOT23 Diodes Incorporated D14 BZX84C5V6-7-F Diode Zener BZX84C 5.6V 7.1% 350mW SOT23 Diodes Incorporated FB4 CB03YTYH331 Ferrite Bead 330 Ohm 1.5A 0603 Viking Tech Corporation L2 BCRH1212Y-680M Inductor 68uH +/-20% 3.5A 63mOhm, RoHS, Tape&Reel Bao Cheng Electronics Co.,Ltd., Q10 LTC2303 MOSFET P-ch -20V -4.7A 70mOhm 1.5V level SOT-23 Lite-On Semiconductor corporation Q11 BSS123LT1G MOSFET N-Ch 100V 170mA 6 Ohm 3V level SOT-23 ON Semiconductor [ONS] U6 TPS54160DGQR DC/DC Buck converter non-sync 60V in 1.5A out 10-MSOP RoHS Tape&Reel Texas Instruments U7 RT9818C-29GVL IC Voltage Detector 2.9V 220ms SOT23-3 Low Open-Drain Richtek Technology Corporation Routerboard does not boot If Netinstall can see the board, but can not install it 1. Troubleshooting flow chart Check 2.0V output On Q301 pin3 2.0V 0V Check 2.5V output on Q300 pin2 2.5V 0V Measure FB300, FB301, FB302, L300 resistance <1 Ohm Change 25MHz Crystal Y200 Change Q301 Change Q300 >1 Ohm Change faulty inductor Change RAM U500 On U1 CPU silcscreen must be the same product code, Change CPU U1 or You will lose the license. License may also lose if changes U200 If you still can't can't install Board, please send it to RMA. 8 Routerboard does not boot
9 2. Components location on RouterBOARD U500 Q300 FB201 FB300 U1 L300 FB301 FB302 Y200 Q Components table Reference Description Manufacturer FB300, FB302 CB03YTYH331 Manufacturer code Ferrite Bead 330 Ohm 1.5A 0603 Viking Tech Corporation FB301 BK1005HS121-T Ferrite Bead 120 Ohm 500mA 0402 Taiyo Yuden Co. Ltd. L300 BCRH2D18B/HP-2R2N-NL Inductor 2.2uH 30% 1.48A 3.2x3.2x2 RoHS Bao Cheng Electronics Co.,Ltd., Q300 DXT2907A-13 Transistor PNP -60V -600mA 0.5W Hfe= SOT89 RoHS Diodes Incorporated Q301 MMBT2907A Transistor PNP -60V -600mA 250mW Hfe= SOT-23 Lite-On Semiconductor corporation U1 U500 QCA9533-BL3A NT5DS32M16DS-5T QCA9533B CHIPSET: 2x2 SB 4+1 Fast Ethernet, No USB, No PCIE (Cu) DDR SDRAM 512Mbit DDR400 32Mx16bit TSOPII C RoHS Qualcomm Atheros Technology Ltd. NANYA TECHNOLOGY CORPORATION [F] Routerboard does not boot 9
10 Ethernet port does not work No link on Ethernet port 1. Troubleshooting flow chart Measure R14, R15, R17, R18 resistance 25 Ohm Change ESD protection diode D3 >25 Ohm Change faulty resistor Change ethernet traf TR1 Change crystal Y200 Change RAM U500 On U1 CPU silcscreen must be the same product code, Change CPU U1 or You will lose the license. License may also lose if changes U200 If there is still no link on ethernet port, please send board to RMA. 10 Ethernet port does not work
11 2. Components location on RouterBOARD U500 U1 D3 R17, R18 Y200 R14, R15 TR1 3. Components table Reference Manufacturer code Description Manufacturer D3 R14, R15, R17, R18 U1 L15ESDL5V0NA-4 Diode Array TVS 150W 4 channel low cap DFN-10 Lite-On Semiconductor corporation RC0201FR-0749R9L Resistor 49.9R 1% 0201 Yageo Corporation QCA9533-BL3A QCA9533B CHIPSET: 2x2 SB 4+1 Fast Ethernet, No USB, No PCIE (Cu) Qualcomm Atheros Technology Ltd. U500 NT5DS32M16DS-5T DDR SDRAM 512Mbit DDR400 32Mx16bit TSOPII C RoHS NANYA TECHNOLOGY CORPORATION [F] TR1 NS /100 Single Ethernet transformer SMD 16pin RoHS T&R Feei Cherng Enterprise CO., LTD. Y200 NXK25.000AE18F-KAB6-2 Crystal 25MHz 20ppm 18pF x2.5 NSK Jenjaan Quartek Corporation WiFi does not work 1. Troubleshooting flow chart - Change U400, U401 - Change Y200 - Change U1 On U1 CPU silcscreen must be the same product code, or You will lose the license. License may also lose if changes U200 If there WiFi still does not work, please send board to RMA. WiFi does not work 11
12 2. Components table Reference Manufacturer code Description Manufacturer U1 QCA9533-BL3A QCA9533B CHIPSET: 2x2 SB 4+1 Fast Ethernet, No USB, No PCIE (Cu) Qualcomm Atheros Technology Ltd. U400, U401 RTC6603 RF SPDT Switch 0.1-3GHz SC-70 Tape&Reel Richwave Y200 NXK25.000AE18F-KAB6-2 Crystal 25MHz 20ppm 18pF x2.5 NSK Jenjaan Quartek Corporation 12 WiFi does not work
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