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37

In this chapter, we'll describe trouble shooting know-how.
In addtion to legacy PBX function, this system has many new function such as VoIP, Wireless LAN etc.
So, at first we have to decide which parts has trouble. Please refer below table, and execute general analysis.

1

Can't turn on power

1. AC/DC unit failure
2. DCDC Converter ciruit failure
3. Unexpected shortage on PCB pattern

Refer to chapter [6.2. Power Failure Analysis]

2

System can't start
STATUS LED is RED

1. Software file destruction
2. FAN failure
3. etc

Refer to chapter [6.3. Error Code]

3

Analog extension (SLC) failure

1. SLC interface circuit failure

Refer to chapter [6.5. SLC8]

4

Analog trunk (LCOT) failure

1. LCOT interface circuit failure

Refer to chapter [6.4. LCOT4]

5

VoIP communication failure

1. LAN/WAN port interface circuit failure
2. DSP function failure

Refer to chapter [6.6. VoIP System]

6

Wireless LAN communication failure

1. Wireless LAN anttena cable faliure
2. Wireless LAN interface circuit failure

Refer to chapter [6.7. Wireless LAN]

7

USB failure

1. USB power supply failure

Refer to chapter [6.3.3. USB]

8

System time failure

1. RTC backup battery failure

Refer to chapter [6.3.4. RTC]

38

DC24V
is  OK?

Start

Check DC24V at 

IC1100 pin 2-4

NO

Check AC/DC Unit

Check DC15V at 

D1103-A

DC15V
is  OK?

NO

Check IC1100

Check DC3.3V

at L1200 

DC3.3V

is  OK?

NO

Check IC1201

Check DC1.05V

at 1.05V VIA

DC1.05V 

is  OK?

NO

Check IC1202

Check DC5.0V

at IC301-1

DC5.0V 

is  OK?

NO

Check IC1205

YES

YES

YES

YES

YES

A

1

5

6

8

7

4

2

1

7

8

2

1

D901A

RL900A

R901A

TP301

PC902A

CF900A

R305

AL900A

C122

9

C301

C303

R340

R1226

D911A

LF301

D912A

S

R918A

IC301

T300

A

3

1

PNLB2540Y   -GW

BASE

L1200

0

0A

R

900B

0

0C

R922A

R922B

R922C

R924A

R924B

R924C

R926A

R926B

R926C

R

C1200

C1208

C1209
C1212

C1216

1

8

2

0

26

R1205

CN500

C912B

C

C500

C501

C502

C503

C2005

R1235

X500

R551

R552

R553

R554

R555

R914A

R914B

R914C

R2028

R916A

R916B

R916C

D500

IC500

TP DCSW4

31

1

4

2

E

D1103

D1107

IC1100

R

1118

R1121

R1124

L1102

CN3001

C1102

06

Q1107

C1117

IC1100-2

DC24V

IC1100-4

GND

D1103-A

DC15V

[DC24V/15V Check Point]

L1200

DC3.3V

[DC3.3V/1.05V Check Point]

[DC5.0V Check Point]

DC1.05V VIA

DC1.05V

IC301-1

DC5.0V

39

A

Check DC1.8V

at 1.8V VIA

DC1.8V 

is  OK?

NO

Check IC1206

Check DC2.5V

at IC1204-5

DC2.5V 

is  OK?

NO

Check IC1204

Check DC1.5V

at 1.5V VIA

DC1.5V 

is  OK?

NO

Check IC1200

End

YES

YES

YES

TR SoC

C901A

C901B

L1200

ZNR900A

ZNR900B

R922A

R922B

R924A

R924B

L700G

L700H

R926A

I SoC

O SoC

C SoC

GND SoC

TP2005

CL2002

0

4

C1216

C1218

C1220

R125

R126

C1226

IC1203

R134

R147

C500

C50

1

C2001

C502

C503

C2004

Q700G

Q700H

R1235

POR

R553

R SoC

R914A

E

R914B

IC700G

C703H

D702G

D702H

R2028

R916A

R916B

C3000

C3001

3.3V SoC

R704G

R704H

IC3001

M SoC

A

BCD

94V-0

E

E

E

E

E

E

C901B

C901C

C901D

C960B

ZNR900

B

ZNR900C

ZNR900D

Q300

Q301

Q302

Q303

Q304

Q305

R928B

IC909

CL2007

R3124

02

6

C1228

1

229

R321

R322

R323

R327

R328

IC1204

R331

38

C1246

R340

R342

R1226

R343

R344

C933B

R

9

R

9

R

9

C937B

IC100

IC101

R918B

C3026

BCD

[DC2.5V/1.8V Check Point]

[DC1.5V Check Point]

DC1.8V VIA

DC1.8V

IC1204-5

DC2.5V

DC1.5V VIA

DC1.5V

40

When STATUS LED turns on RED, any error status may occured internaly.
To distinguish the detail reason of error, you have to use Web Maintenance Console tool.
For more information of Web-MC tool, please refer below documents.

[ 3.9.1 Overview of Web Maintenance Console ]

[ 4.3.2 Maintenance - [3-2] Utility - System Log ]

MPR WDT overflow

Program operation 
failure due to 
unexpected error.

0

Major

1

0

0

X

X

0

0

0

-

RED At first please try [Initial Reset], after 

that, if problem occures, please refer to 
[6.3.1.CPU].
For initial reset procedure, please refer 
to [Getting Started Guide / 3.8 Starting 
the PBX]

System start up error

Application programe 
start error.

3

Major

1

0

0

0

1

0

0

0

-

RED At  first  please  try  [Initial  Reset], after 

that, if problem occures, please refer to 
[6.3.1.CPU].
For initial reset procedure, please refer 
to [Getting Started Guide / 3.8 Starting 
the PBX]

Heat Alarm

CPU temperature is 
too high.

9

Major

1

0

0

0

1

0

0

0

-

RED Possible  reason  is

1. Clogged ventilation holes
2. Cooling FAN failure
Please refer to [6.3.2. FAN].

FAN stop Alarm

Cooling FAN stop.

13

Major

1

0

6

0

1

0

0

0

-

RED Possible  reason  is  Cooling  FAN  failure.

Please refer to [6.3.2.FAN].

FAN Alarm

Cooling FAN rotation 
speed error.

14

Major

1

0

6

0

2

0

0

0

-

RED Possible  reason  is  Cooling  FAN  failure

Please refer to [6.3.2.FAN].

USB access error

Can't access to USB 
memory which is 
connected to USB 
connector.

20

Major

1

0

5

0

4

0

0

0

-

RED Please  refer  to  [6.3.3. USB].

System data file not 
found

System data file does 
not exist on NAND 
Flash memory.

31

Major

1

0

0

0

1

0

0

0

-

RED At  first  please  try  [Initial  Reset], after 

that, if problem occures, please refer to 
[6.3.1. CPU].
For initial reset procedure, please refer 
to [Getting Started Guide / 3.8 Starting 
the PBX]

System initialization file 
not found

System initialization file 
does not exist on 
NAND Flash memory.

32

Major

1

0

0

0

1

0

0

0

-

RED At  first  please  try  [Initial  Reset], after 

that, if problem occures, please refer to 
[6.3.1. CPU].
For initial reset procedure, please refer 
to [Getting Started Guide / 3.8 Starting 
the PBX]

System initialization file 
access error

System initialization file 
access error on NAND 
Flash memory.

36

Major

1

0

0

0

1

0

0

0

-

RED At  first  please  try  [Initial  Reset], after 

that, if problem occures, please refer to 
[6.3.1. CPU].
For initial reset procedure, please refer 
to [Getting Started Guide / 3.8 Starting 
the PBX]

RTC backup failure

RTC backup time 
failure.

40

Major

1

0

2

0

1

0

0

0

-

RED Possible  reason  is

1. Battery backup voltage failure.
2. RTC IC failure
Please refer to [6.3.4. RTC].

Program Recovery

System software 
version up failure and 
recovered to original 
file.

48

Major

1

0

0

0

1

0

0

0

-

-

--------