Control Panel Displays The Error Message "Call Service 20; Control Panel Displays The Error Message "Call Service 04,05,06,07,10,11 - Star Micronics LS-5 SERIES Technical Manual

TROUBLESHOOTING

2-1. Control Panel Displays the Error Message "CALL SERVICE 20"

Step
1 Check parts with different specifications for problems with
usage, defective installation, breakage, and deformation.
• Main parts to be checked:
(1) MCU PCB
2 Does problem recur if power is turned on again?
3 Does problem recur if power is turned off and on several times?
*1: The problem is thought to be caused by external noise, but just to be sure, go on to Section 3-21, "Noise", and check
as described in this section.
Note: If the problem recurs even after the MCU PCB is replaced with a normal one, check as described in Section 3-21,
"Noise".

2-2. Control Panel Displays the Error Message "CALL SERVICE 04,05,06,07,10,11"

Step
1 Check parts with different specifications for problems with
usage, defective installation, breakage, and deformation.
• Main parts to be checked:
(1) Main logic board
2 Does problem recur when power is turned on again?
3 Does problem recur if power is turned off and on several times?
*1: The problem is thought to be caused by external noise, but just to be sure, go on to Section 3-21, "Noise", and check
as described in this section.
Note: If the problem recurs even after the main logic board is replaced with a normal one, check as described in Section
3-21, "Noise".
Check
Check
– 84 –
Measure
YES
To step 2 Replace or
reinstall.
Replace MCU
To step 3
PCB.
Replace MCU
Processing
PCB.
completed *1.
Measure
YES
To step 2 Replace or
reinstall.
Replace main To step 3
logic board.
Replace main
Processing
logic board.
completed *1.
NO
NO