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25

Yes

No

No

Yes

Related parts:Color LCD module,CN1, 
See 9.2 Color LCD with Touch Panel Does Not 
Operate. (P.3)

Sea Table-1(P.2)

Related parts: Power supply 
See  9.1.2 AC Adaptor (P.2) or 
See  9.1.3. PoE (P.2)
Sea Table-1(P.2)

Confirm the Color LCD module.
Is it working?

When input any POWER(AC adaptor or PoE).
Does RINGER-LED (BLUE) light?

END

  Check the soldering.
  Resolder or replace parts as needed.

Yes

No

Related parts: F301,L306,C322,C318,D302,D301

 JK301

Check the soldering.
Resolder or replace parts as needed.

Measure the voltage at TP:12V.
Is it about 12V? 

GO TO  A

26

Refer to waveform (2), (3), (4) in Waveform (P.56)

No

Yes

No

Confirm the waveform of reset signal at 
TP PWR_RST.
See the communication waveform (2)*. 

Yes

No

Confirm Flash(IC103) and DDR(IC102) 
memory data.

END

*

1 

Each IC103 has its own MAC address.
When replacing the PCB , 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: IC401,R425,C445,C446,C459

No

Measure the frequency of clock signal at
Pin 1 of X101. Is it 25MHz?
See the communication waveform (3)*. 

Yes

Related parts: :X101,R144,R146,C152,C153

Measure the voltage at TP : 5.0V. 
Is it 5.0V?

A

Related parts: See Table-1 (P.2),Table-2(P.2) and

Table-3 (P.).

No

Confirm the Main LCD display.
Is it working?

Yes

Related parts:

See 9.2. LCD Does Not Operate (P.3).

Yes

Color LCD module,CN1, 
R621,R623,R624,R629,R630,R679,
R625-R678,R6026-R6029,R170,
R177,L102,L602,R609-R612,
C610,C611,C613-C617,C620-C625,
C629-C634,C637

No

Yes

Measure the voltage at TP:+3.3V.
Is it 3.3V? 

 

Related parts: C372,C371,R332,C367,C369,R331

IC305,R330,C352,L305,R328,R329
C350,C349,C384,C383,R327

Related parts: C341,C337,R322,C323,C330,R319,

IC302,R315,C319,L301,R308,R309,
C315,C312,C311,C310,R306,R301,
R303,R307

No

Yes

Measure the voltage at TP:+1.1V.
Is it 1.1V? 

Related parts: C342,C338,R323,C324,C331,R320,

IC303,C320,L302,R310,R311,
C316,C313,C386,C385,R347

No

Yes

Measure the voltage at TP:DDR_1.5V.
Is it 1.5V? 

Related parts: C377,R341,IC307,C378,R344

No

Yes

Measure the voltage at TP:VDD_18V.
Is it 1.8V? 

Related parts: IC101,C474,C476

No

Yes

Measure the voltage at TP:CL_VDD12V.
Is it 1.3V? 

Related parts: IC101,L409,C494

No

Measure the frequency of clock signal at
Pin 1 of X102. Is it 12MHz?
See the communication waveform (4)*. 

Yes

Related parts: :X102,R145,R147,C154,C155

  Check the soldering.
  Resolder or replace parts as needed.

27

Refer to waveform (1) in Waveform (P.56)

Yes

No

No

No

Yes

Related parts: C221,R209,C217,R211,
                       R202,C214,R206,C211

Related parts: C203,C205,C215,C201,C293,
                        D218,Q202,R208,R214,R210,

                       R207,C208

Related parts: JK201,T202,F201,F202,
                       L208,L209,L210,L211

Confirm the waveform of PoE Switching Regulator 
SIGNAL at Pin(Gate) of Q202.
See the communication waveform(1)*.

No

Yes

Related parts: L202,R204,R213,R201,C202,
                        C207,C210,C213,R205,C216
                        D304
 

Measure the voltage at TP:PoE_DC.
Is it about 10.6V?

 

Measure the voltage between Pin6 and Pin7 of 
IC202.
Is it between 44V to 57V? (typ 48V)

Measure the voltage between TP:
(PoE-AP, PoE-AN) or (PoE-BP, PoE-BN).
Is it between 44V to 57V? (typ 48V)

GO TO  A

  Check the soldering.
  Resolder or replace parts as needed.

28

 The error result is output to a port of IC101 at error. Check the Test Point ST3,ST2,ST1 and ST0.
See below for the output contents.

Pre-check : All voltage is correct-->5V/3.3V/2.8V/1.8V/1.5V/1.35V/1.1V

IC101

ST0

ST2

ST1

ST3

㻿

㻿㼀㻟

㻿㼀㻞

㻿㼀㻝

㻿㼀㻜

㻝 㻜㼤㻜

㻸

㻸

㻸

㻸

㻮㼛㼛㼠㻌㻱㼞㼞㼛㼞

㻼㼃㻾㼋㻾㻿㼀㻘㻌㻮㻮㻵㻯㻔㻵㻯㻝㻜㻝㻕㻌㻘㻌㻲㼘㼍㼟㼔㻔㻵㻯㻝㻜㻟㻕

㻞 㻜㼤㻝

㻸

㻸

㻸

㻴

㻰㻰㻾㻟㻌㻰㼍㼠㼍㻌㻱㼞㼞㼛㼞

㻰㻰㻾㻟㻔㻵㻯㻝㻜㻞㻕㻌㼛㼞㻌㼕㼠㼟㻌㼜㼑㼞㼕㼜㼔㼑㼞㼍㼘㻌㼏㼕㼞㼏㼡㼕㼠

㻟 㻜㼤㻞

㻸

㻸

㻴

㻸

㻸㻞㻿㼃㻌㻵㼚㼕㼠㼕㼍㼘㼕㼦㼍㼠㼕㼛㼚㻌㻱㼞㼞㼛㼞

㻸㻞㻿㼃㻔㻵㻯㻞㻜㻟㻕㻌㼛㼞㻌㼕㼠㼟㻌㼜㼑㼞㼕㼜㼔㼑㼞㼍㼘㻌㼏㼕㼞㼏㼡㼕㼠

㻠 㻜㼤㻟

㻸

㻸

㻴

㻴

㻲㼘㼍㼟㼔㻌㻾㻻㻹㻌㻰㼍㼠㼍㻌㻱㼞㼞㼛㼞

㻼㼞㼛㼓㼞㼍㼙㻌㻭㼞㼑㼍㻌㻾㼑㼍㼐㻌㻱㼞㼞㼛㼞㻔㻵㻯㻝㻜㻟㻕

㻡 㻜㼤㻠

㻸

㻴

㻸

㻸

㻲㼘㼍㼟㼔㻌㻾㻻㻹㻌㻰㼍㼠㼍㻌㻱㼞㼞㼛㼞

㻭㼐㼖㼡㼟㼠㼙㼑㼚㼠㻌㼐㼍㼠㼍㻌㼞㼑㼍㼐㻌㼑㼞㼞㼛㼞㻔㻵㻯㻝㻜㻟㻕

㻢 㻜㼤㻡

㻸

㻴

㻸

㻴

㻔㻾㼑㼟㼑㼞㼢㼑㻕

㻣 㻜㼤㻢

㻸

㻴

㻴

㻸

㻰㻿㻼㻌㻰㼑㼒㼑㼏㼠

㻮㻮㻵㻯㻔㻵㻯㻝㻜㻝㻕㻌㼛㼞㻌㼕㼠㼟㻌㼜㼑㼞㼕㼜㼔㼑㼞㼍㼘㻌㼏㼕㼞㼏㼡㼕㼠

㻤 㻜㼤㻣

㻸

㻴

㻴

㻴

㼂㻵㻰㻱㻻㻌㻹㻻㻰㼁㻸㻱㻌㻱㼞㼞㼛㼞

㼂㻵㻰㻱㻻㻌㻹㻻㻰㼁㻸㻱㻌㻔㻵㻯㻢㻜㻝㻘㻵㻯㻢㻜㻞㻘㻵㻯㻢㻜㻟㻌㼛㼞㻌㼜㼑㼞㼕㼜㼔㼑㼞㼍㼘㻌㼏㼕㼞㼏㼡㼕㼠㻕

㻥 㻜㼤㻤

㻴

㻸

㻸

㻸

㻺㼛㼠㻌㻱㼞㼞㼛㼞

㻝㻜 㻜㼤㻥

㻴

㻸

㻸

㻴

㻔㻾㼑㼟㼑㼞㼢㼑㻕

㻝㻝 㻜㼤㻭

㻴

㻸

㻴

㻸

㻭㻿㻵㻯㻌㻰㼍㼠㼍㻌㻱㼞㼞㼛㼞

㻭㻿㻵㻯㻔㻵㻯㻡㻜㻝㻕㻌㼛㼞㻌㻵㻛㻲

㻝㻞 㻜㼤㻮

㻴

㻸

㻴

㻴

㻔㻾㼑㼟㼑㼞㼢㼑㻕

㻝㻟 㻜㼤㻯

㻴

㻴

㻸

㻸

㻯㼍㼙㼑㼞㼍㻌㻱㼞㼞㼛㼞

㻯㼍㼙㼑㼞㼍㻌㼛㼞㻌㻵㻛㻲

㻝㻠 㻜㼤㻰

㻴

㻴

㻸

㻴

㻔㻾㼑㼟㼑㼞㼢㼑㻕

㻝㻡 㻜㼤㻱

㻴

㻴

㻴

㻸

㻔㻾㼑㼟㼑㼞㼢㼑㻕

㻝㻢 㻜㼤㻲

㻴

㻴

㻴

㻴

㻔㻾㼑㼟㼑㼞㼢㼑㻕

㻾㼑㼙㼍㼞㼗㼟㻦㻌㻴㻩㻝㻚㻤㼂㻘㻌㻸㻩㻜㼂

㻺

㻺㼛㻚

㼀

㼀㼑㼟㼠㻌㻼㼛㼕㼚㼠

㻱

㻱㼞㼞㼛㼞㻌㻵㼠㼑㼙

㻯㼔㼑㼏㼗㻌㻼㼛㼕㼚㼠

㻱㼞㼞㼛㼞㻌㻯㼛㼐㼑