Service manual

LEDS
SM 6-3 B358
Trouble-
shooting
6.2 LEDS
6.2.1 LOCATION
Four LEDs (LED2 to LED5) are located near SW2 on the printer controller. They
indicate display the progress of the self test, and errors and status conditions.
6.2.2 LED CODE TABLE
Self Diagnostic
The following LED table is for the self diagnostic function. When an error occurs
during the self diagnostic test, all four LEDs blink then indicate the error as shown
in the following table.
e.g.) RAM error:
All LEDs on (1 s)
→
off (1 s)
→
on (1 s)
→
off (1 s)
→
LED4 on (5 s)
→
from the
beginning.
1 = LED is lit, 0 = LED is off
LEDs
LED2 LED3 LED4 LED5
Description
0001ROM error
0 0 1 0 RAM (resident, SIMM) error:
note 1)
0 0 1 1 NVRAM error:
note 1)
0101Fatal error
0 1 1 0 Debug trap error:
note 2)
NOTE:
1) SC2000 is also displayed.
2) SC2002 is also displayed.
SW2
PWR
LED2 LED3 LED4 LED5
TB2
B358T500.WMF