KX-NS8290CE - Panasonic PBX Service Manual (repair manual). Page 27

27

After power on, KX-NS8188/8290 will start several programs, and program loading status can be distinguished by SYSTEM LED.
To find the problem, you should check SYSTEM LED.

START

Power ON

SYSTEM

(Orange)

LINE OFF

SYSTEM

(Orange Blink)

LINE OFF

SYSTEM

(Orange)

INE OFF

SYSTEM

(Orange Blink)

LINE OFF

SYSTEM

(Green)

LINE

(Green)

     or
SYSTEM

(Red)

LINE OFF

SYSTEM

(Red Blink)

LINE OFF

If NO LED turns on, please check power circuit.
Refer  to  [ 8.1 Power Circuit]

After power on, boot loader program will start hardware initialization. If boot loader
doesn't start, Refer to [8.2 Clock/Reset/NOR Flash]

5 sec

 5 sec

30 sec

About
90 sec

Boot loader started correctly, and going to load the Linux OS.

Boot loader program started correctly, but Linux OS can't start, it seems that
loading the Linux Kernel image from the NAND Flash device may be failed.
Please refer to [8.3 NAND Flash]

Linux OS started correctly, and now KX-NS8188/8290 is going to start application
programs, if application programs don't start, several system configuration files may
be damaged. Please refer to [8.4 Application Program Trouble]

If application program finds that several system
configuration files are damaged, SYSTEM LED
blinks red. Please refer to
 [8.4 Application Program Trouble]

After all application software started, SYSTEM LED depends on
the LINE (E1/PRI) link status, if SYSTEM LED continues Red
and LINE LED doesn't turn on, please check E/PRI line
connection.

SYSTEM LED is Green, but communication is NG, refer to
[8.5 Communication Trouble]

If speech has noise sound, please refer to
[8.6 Speech Noise]

END