DOWNLOAD Panasonic KX-NT511PRUW / KX-NT511PRUB Service Manual ↓ Size: 5 MB | Pages: 68 in PDF or view online for FREE

25

No

Yes

END

Confirm the Speakerphone communication.

Can it hear any sound from speakerphone speaker?

Related parts:

No

Yes

Confirm the waveform between TP CL-SPP and
TP CL-SPM. Is there any output waveform?

  Check the soldering.
  Resolder or replace parts as needed.

L301, L302, R329, R330, C375,

 C376

Related parts:

Speaker, Speaker-cable

No

Yes

No

Yes

END

Related parts: Microphone, Microphone-cable

Confirm the Speakerphone communication.

Can it hear any sound from speakerphone 

microphone?

Confirm the Speakerphone communication.

Can it hear any sound from speakerphone 

microphone?

Related parts: R320, R321, R322, R323, R325,

R326, R327, R328, C365, C366

  Check the soldering.
  Resolder or replace parts as needed.

No

Yes

Measure the voltage at C369.

(Between MICBIAS and AGND).

Is it 3.3V?

Related parts: R324

26

Refer to waveform (2), (8),

(9) and (10) in  Waveform (P.44), (P.45).

Connect LAN cables to SwitchingHUB.

Check the soldering.

  Resolder or replace parts as needed.

Measure the voltage at Pin5 and Pin22 of IC201.

Is it 3.3V?

Measure the voltage at Pin7 and Pin32 of IC201.

Is it 1.8V?

Measure the 25MOUT signal at Pin14 of IC201.

Is it 25MHz?

See the communication waveform(2).

Confirm the waveform between Pin36 and Pin37 of IC201. 

See the communication waveform (7).

Yes

Yes

Related parts: L201, L308

Related parts: L202

Related parts: X1, C101, C102, R108, R110, 
                       R111, L105, IC101

Related parts: IC101, IC201, R101, R102, R217,
                       R218, RA202

Confirm the waveform Pin23 and Pin30 of IC201.

Confirm the waveform Pin26 and Pin29 of IC201.

See the communication waveform (8).

Yes

Related parts: R214, R220, L204, L205, IC201

See the communication waveform (9).

Yes

Related parts: IC201, RA201

Confirm the waveform from Pin17 to 20 of IC201

See the communication waveform (10).

when sending a packet.

Yes

Related parts: IC201, RA101

Yes

END

No

No

No

No

No

No

No

Recheck the TEST POINT(ST0-ST3).

See Table-1. (P.19)

Is it L2SW initialization Error (No.11)?

Check the TEST POINT(ST0-ST3).

See Table-1. (P.19)

L2SW initialization Error (No.11) ?

Yes

Related parts: IC201

No

Yes

PHY(IC401) is working.
See 9.5.2 LAN port (P.2

) or 

9.5.3 PC port. (P.2

)

No

Yes

27

Refer to waveform (11) and (12) in  Waveform (P.45).
Connect LAN cables to SwitchingHUB.

Refer to waveform (13) and (14) in  Waveform (P.45).

Connect LAN cables to SwitchingHUB.

Check the soldering.

Resolder or replace parts as needed.

Confirm the waveform between LAN1 ans LAN2 land.
Confirm the waveform between LAN3 ans LAN4 land.

See the communication waveform (11)or(12).

Related parts: T2,L203,R203,R204,R209,R210,
                        R211,R212,C209,C210,C255,
                        C256,C202,Flat cable,JK2,R403,
                        R404

END

No

Yes

Check the soldering.

Resolder or replace parts as needed.

Confirm the waveform between PC1 ans PC2 land.
Confirm the waveform between PC3 ans PC4 land.

See the communication waveform (13)or(14).

Related parts: T1,L203,R201,R202,R205,R206,
                       R207,R208,C207,C209,C201,
                       Flat cable,JK2,R401,R402

END

No

Yes

28

Check the soldering.

Resolder or replace parts as needed.

Does SP-PHONE_LED light?

Related parts: IC101,L401,LED406,Q105,
                       R171,R155

No

Yes

Related parts: IC101,LED407,Q105,R172,R156

No

Yes

Does RINGER LED(RED) light?

No

Yes

Does MUTE LED (RED) light?

Does FF1 LED (Function) light?

Related parts: IC101,L401,LED405,Q104,R170,
                       R154

No

Yes

Related parts: IC101,L401,LED401,Q101,R163,
                       R164,R147,R148

END