KX-NT511ARUW, KX-NT511ARUB - Panasonic Telephone Service Manual (repair manual). Page 17

17

Refer to waveform (1),(2) and (3)  Waveform (P.41) .

Yes

END

No

Yes

No

Related parts: F1,L210,C229,C230,D209

Check the  "DC JACK ASSY" and soldering.
Resolder or replace parts as needed.

Measure the voltage at TP:DCIN.
Is it about 5.5V? 

Measure the voltage at TP5V.

Is it 5V?

Measure the voltage at TP 3.3V.

Is it 3.3V?

Yes

Related parts: R233,R241,D211,C236,C239

Related parts:  IC202,R234-R239,C235,C237,

C243,C241,C245,C247,C249,
C251,C253,L211

No

No

Yes

Yes

Measure the voltage at TP 5V.

Is it 5V?

Measure the voltage at TP 3.3V.

Is it 3.3V?

Yes

No

No

Yes

Measure the voltage at TP CL±VDD1.8V.
Is it 1.8V?

Measure the voltage at TP CL±VDD1.2V.
Is it 1.2V?

Yes

Related parts: IC101,C304,C305,C344

Related parts:  IC101,L307,C303

No

No

Yes

Confirm the waveform of reset signal at
TP PWR_RST.

See the communication waveform(1)*.

Measure the frequency of clock signal at
Pin 1 of X1
is it 25MHz?
See the communication waveform(2)*.

Yes

Yes

Related parts: IC301,R305,R306,C326-C328

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

No

No

Measure the frequency of clock signal at
Pin 1 of X2
is it 12MHz?
See the communication waveform(3)*.

Related parts:  X2,C103,C104,R112,R113,IC101

No

Yes

No

Yes

Confirm the LCD display.

Is it sorking?

Related parts:  RA110,L103,C129,C130,C131,

C132,C133,C134,C135,R140,
R141,R142,R143,R145,Q106,
CN2,LCD Module

*

1

Each IC101 has its own MAC address.
When replacing the PCB1, remove the former
MAC address label from the bottom of the unit
and affix the included label which indicates the
new MAC address.

Related parts: See Table-2(

P.19

) to

Table-5(

P.21

).

See 9.2 LCD Does Not Operate.(

P.22

)

Recheck the TEST POINT(ST0-ST3).
See Table-1. (

P.18

)

Is it "NOT Error (No.14)" ?