Led Check - Furuno FELCOM 12 Service Manual

5.2 LED Check

The table below shows LED state on the PCBs.
Board
CPU Board
(16P0147)
Figure 5-1 Location of LED and Test Point on CPU Board
: on
LED No. State
CR 2
(GRN)
CR 3
(RED)
CR 4
(GRN)
CR 5
(RED)
CR 6
(GRN)
CR 7
(RED)
CR 8
(GRN)
CR 9
(ORG)
TP1
TP3 TP2
U11 : EE-PROM
BUZZER
U39 : ROM
BATT S1
: blinking : off
Function
Blinks when CPU2 operates correctly.
Lights when CPU2 error is detected.
Blinks when unique words are detected
(on for 8.14 sec, off for 0.5 sec)
Lights when CPU1 error is detected.
Blinks when CPU1 operates correctly.
Lights during carrier signal acquisition and
goes off when signal is aquired. (FFT)
Lights when signal is acquired. (FFT)
Lights during set-up process at power-up.
FFT: Font Fourier Transform
U44 : DEMOD
ROM
TP4 TP5
5-4
CR 7
CR 8
CR 9