Self-Diagnostic Function (Self Test) - JRC JMA-5212-4/6 Service Manual

6.1.1. Self-diagnostic Function (Self Test)

This function checks the memory, scanner unit, and communication lines.
1. Memory Test
2. TXRX Test
3. Line Test
Display-system internal memory check (Memory Test)
Checks the internal memory operating conditions.
1. SDRAM
2. SRAM
3. Flash ROM
4. Graphic
If no abnormality is detected, "OK" is displayed; if an abnormality is detected, "NG" is
displayed.
Scanner unit check (TXRX Test)
Checks signals from the scanner.
Safety Switch
AZI Pulse
HL Pulse
MH Current
Trigger
Video
If no abnormality is detected, "OK" is displayed; if an abnormality is detected, "NG" is
displayed.
** is displayed when the equipment is in standby state.
1. Display-system internal memory check
2. Scanner unit check
3. Communication line check
1. SDRAM check
2. SRAM check
3. Flash ROM check
4. Graphic check
Scanner-unit safety switch check
Antenna rotation signal check
Heading line signal check
Check on the load current of high voltage
in the modulator
Radar trigger signal check
Radar image check
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