Furuno FS-1570 Service Manual page 195

- E ALARM: External incoming indicator (IC-303-DSC) test. Press the button after
- E ALERT: External distress alert button (IC-302-DSC) test. Press the button after
pressing [ENT].
- PLL: If it is normal, "-----" appears. When an error is detected, the error name is
displayed.
C-CPU PCB test
Figure below shows C-CPU PCB test menu. The test result is showed by OK or NG.
- PROM: Shows the program version of C-CPU. The program is installed on Flash
ROM (U4).
- EEROM: Read and write test of EEPOM (U5).
- SRAM: Read and write test of SRAM (U6 and U7).
- NBDP: NBDP port is tested. Connect the terminal or the test jumper. The same as
REMOTE test on page 6-16.
- PRINT: Prints out the following characters.
"0123456789
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz"
- LCD: Four patterns are displayed on the LCD.
- CONTRAST: Varies LCD contrast.
- B LED: Brightness of key LED varies.
- A LED: The alarm and the distress button LEDs are switched on/off.
- VC 1: The volume of the external loudspeaker changes.
- VC 2: The volume of the handset speaker changes.
- INPUT: Key function except for [CANCEL] is tested. ON-HOOK and OFF HOOK
signals are not detected. The acronym on the key top is displayed.
- ENCODER: The knob is tested. The number changes from –99 (fully ccw) to +99
pressing [ENT]. The alarm is released and LED lights on IC-303-DSC.
The alarm is also released from FS-2570C.
(fully cw).
6.5 TEST function in DSC SETUP menu
6-19