4. Troubleshooting
4-12
Error type
Error mode
Checking Method
Corrective actions
Display error
None
1. Check the connections for the Display LED
connector part.
- Reconnect the connectors for Display LED.
2-1. Check the Display LED. (the top display of
DMR77)
- Check the number of the part that operates
abnormally. Check the LED on that abnormal
part by inputting 5V to the S part through a
300Ω resistor and grounding the D part.
Normal: The point lights up normally.
➢
Ex) If the D1-a point operates abnormally,
check the connections between pin 1 of the 7-
pin connector and pin 1 of the 6-pin connector.
(See the figure on the right.)
- Faulty: Replace the Display LED.
2-2. Check the display LED. (the front display of
DMR77)
- Check the number of the part that operates
abnormally. Check the LED on that abnormal
part by inputting 5V to the S part through a
300Ω resistor and grounding the D part.
Nomral: The point lights up normally.
➢
Ex) If the D1-a point operates abnormally,
check the connections between pin 1 of the 8-
pin connector and pin 1 of the 5-pin connector.
(See the figure on the right.)
- Faulty: Replace the display LED.
Summary of Contents for DMR78AHS/XAC
Page 14: ...2 6 2 Features and Specifications Memo ...
Page 38: ...3 24 3 Disassembly and Reassembly Memo ...
Page 59: ...4 Troubleshooting 4 21 Memo ...
Page 73: ...5 14 5 Exploded Views and Parts List 5 7 MAIN DMR57 0 1 D049 Z019 P143 ...
Page 85: ...5 26 5 Exploded Views and Parts List ...
Page 95: ...6 10 6 PCB Diagram Memo ...
Page 103: ...8 5 8 Schematic Diagram Memo ...
Page 104: ...9 1 9 Reference 9 Reference 9 1 Model Number Naming Rules 8 2008 A ALL ...