Read Panasonic KX-NT511PRUW / KX-NT511PRUB (serv.man2) Service Manual Supplement online
KX-NT511PRUW/KX-NT511PRUB
9
1.3. TROUBLESHOOTING GUIDE
1.3.1. No Operation
1.3.1.1 Power Supply : AC Adaptor
Changed from the Original Service Manual Section 9.1.2.
Yes
No
Related parts: JK700, F700, L704, C739, C756,
D707, D705, IC701-704, C733,
C727, C717, C747, C759-761,
C754
Check the soldering.
Resolder or replace parts as needed.
Measure the voltage at TP:DCIN1.
Is it about 9V?
GO TO A
Note:
Refer to waveform (1) and (2) Waveform (P.44) .
1.3.1.2 Power Supply : PoE
Changed from the Original Service Manual Section 9.1.3.
GO TO A
Yes
No
Related parts: JK2, T2, L411-L414, R403,
R404, R202, R204, C426, C427,
C255, C256, C202, D401, D402
Measure the voltage between Pin + and - of D401.
Is it about 48V?
Measure the voltage at TP5V.
Is it 5V?
Measure the voltage at TP 3.3V.
Is it 3.3V?
Related parts: IC401, F401, L415, D403, C401
Related parts: IC401, Q401, D406, L417, R418,
R416, R417, R414, R415, C406,
R411-R413, C412, C411, C402,
C403
No
No
Yes
Yes
Measure the voltage between Pin 7 and 8 of IC401.
Is it about 48V?
Confirm the waveform of PoE Swiching Regulator
signal at Pin(Gate) of Q401.
See the communication waveform(15).
Yes
No
No
Measure the voltage at TP:8V(8V).
Is it about 8V?
Related parts: D408, L418, C425, R420, R421,
R422, R419, C415, C423, C422
C421, C420, C419, C418, C417,
IC202
No
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