Repair instruction
RB wAP2nD
Published November 5, 2015
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............................................................................................................11
2 Latest Checking procedure for over-voltage damage available at www.mikrotik.com
List of RouterBoard wAP series
wAP
wAP ac
List of RouterBoard wAP series 3
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
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
If Power_IN Failed
1. No power on 8-57V input
Check for 8-57V
output on C130
Try to use different
PSU adapter
OK Not OK
Problem solved Measure if there is no short
between GND and C130 “+” pin
No short Short
Measure voltage Change Q11
on Q10 pin2
8-57V 0V
Measure voltage drop Measure Voltage
over D13, D14, D4, D5 drop over D1, D2
<0.7V >0.7V <0.7V >0.7V
Change U7 Change faulty Change Q10 Change D1
Problem still
diode
appears
Change Q11
6 Routerboard does not power on
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
No short Short
Measure L2, FB4 resistance Change C125
<1 Ohm >1 Ohm
Measure voltage Change faulty
Drop ower D12 inductor
<0.7 V >0.7 V
Change U6 Change D12
4. Supply voltage components location on RouterBOARD
L2
D12
C130
U6
C125
D2 D1
Q10
FB4
U7 D13
Q11
D14 D4
D5
Routerboard does not power on 7
5. Supply voltage Components table
Reference Manufacturer code Description Manufacturer
C125 MP6RL220MC6 Capacitor PolymerAl 220uF 20% 6.3V 6.3x6 TH P=2.5 2000h 3.16A 15mOhm Matsuki Polymer Technology CO., LTD.
C130 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)
D1, D2, D4,
B2100AF Diode Schottky 100V 2A SMA Lite-On Semiconductor corporation
D12
D5 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 Change Q301
on Q300 pin2
2.5V 0V
Measure FB300, FB301, Change Q300
FB302, L300 resistance
<1 >1
Ohm Ohm
Change 25MHz Change faulty
Crystal Y200 inductor
Problem still
appears
Change RAM U500
Problem still
appears
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
2. Components location on RouterBOARD
Q300 U500
FB201
FB300
U1
L300
FB301
FB302 Y200
Q301
3. Components table
Reference Manufacturer code Description Manufacturer
FB300, FB302 CB03YTYH331 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=100-300 SOT89 RoHS Diodes Incorporated
Q301 MMBT2907A Transistor PNP -60V -600mA 250mW Hfe=100-300 SOT-23 Lite-On Semiconductor corporation
U1 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-66 0+70C RoHS NANYA TECHNOLOGY CORPORATION [F]
Routerboard does not boot 9
Ethernet port does not work
No link on Ethernet port
1. Troubleshooting flow chart
Measure R14, R15,
R17, R18 resistance
25 Ohm >25 Ohm
Change ESD Change faulty
protection diode D3 resistor
Problem still
appears
Change ethernet
traf TR1
Problem still
appears
Change crystal Y200
Problem still
appears
Change RAM U500
Problem still
appears
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
2. Components location on RouterBOARD
U500
U1
D3
R17, R18
Y200
R14, R15
TR1
3. Components table
Reference Manufacturer code Description Manufacturer
D3 L15ESDL5V0NA-4 Diode Array TVS 150W 4 channel low cap DFN-10 Lite-On Semiconductor corporation
R14, R15,
RC0201FR-0749R9L Resistor 49.9R 1% 0201 Yageo Corporation
R17, R18
U1 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-66 0+70C RoHS NANYA TECHNOLOGY CORPORATION [F]
TR1 NS601680 10/100 Single Ethernet transformer SMD 16pin RoHS T&R Feei Cherng Enterprise CO., LTD.
Y200 NXK25.000AE18F-KAB6-2 Crystal 25MHz 20ppm 18pF -20+70 3.2x2.5 NSK Jenjaan Quartek Corporation
WiFi does not work
1. Troubleshooting flow chart
- Change U400, U401
- Change Y200
On U1 CPU silcscreen must be the same product code,
- Change U1 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
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 -20+70 3.2x2.5 NSK Jenjaan Quartek Corporation
12 WiFi does not work
