Test Function In Dsc Setup Menu; Unlocking Test Menu - Furuno FS-1570 Service Manual

6.5 TEST function in DSC SETUP menu

The following describes the factory-test. To unlock the test menu, a password is required.

6.5.1 Unlocking TEST menu

To unlock the TEST menu;
1. Press [6/SCAN] to show the DSC display.
2. Press [SETUP] to show the DSC setup menu.
3. Move the cursor over [3/TEST] and then press [ENT]. The "Test function" menu
appears with "PROTECTION ON" message.
4. Enter the password ([x][x][x][x][x][x]) to unlock the menu. Table below summarizes test
items.
Test function
TONE TX
REMOTE
EXT ALARM
EXT ALERT
PANEL PCB
T-CPU PCB
C-CPU PCB
TX/RX PCB
W/R PCB
TA TEST
Outputs TONE to check the modulator output in the transmitter.
Loop-back test for REMOTE ports
Checks IC-303-DSC control signal
Checks IC-302-DSC control signal
Checks FS-2570C panel control signal
Checks T-CPU board control signal
Checks C-CPU board control signal
Presets frequency for PLL and receiver adjustment
Presets frequency for PLL and receiver adjustment
Used at type approval
6-15
6.5 TEST function in DSC SETUP menu
Table 6.5.1 TEST items in Test function
Description