Epson EPL-N3000 - RAM Error (Slot 0); ROM Checksum Error (Font)

EPSON EPL-N3000/AcuLaser M4000N Revision C
Troubleshooting Troubleshooting When There is Error Display 100
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3.2.41 RAM Error (Slot 0)
This error relates to expanded RAM.
3.2.42 ROM Checksum Error (Font)
This error is a standard font ROM fault.
Note : The Main Board Assy and Memory Board Assy used with EPL-N3000 are as listed
below. The font ROM is mounted on the Memory Board Assy.
For details, refer to “2.7 Operating Principles of Electric Circuitry (p.61)”.
Table 3-44. Troubleshooting for “RAM Error”
Step Action and Question Yes No
Parts below can be the source of this error (Chapter 4 Disassembly and Assembly)
• BOARD ASSY., MAIN (p.299)
• Expanded RAM DIMM
1
Expanded RAM-DIMM
1. Remove the expanded RAM DIMM and check the
operation.
♦Does the error still occur?
Go to Step 2
Problem
solved
(Advise the
user to use the
recommended
RAM)
2
BOARD ASSY., MAIN
1. Replace the BOARD ASSY., MAIN.
♦Does the error still occur?
Go to 3.4.17
Electrical
Noise (p.127)
Problem
solved
C H E C K
P O I N T
 Since the expanded RAM is mounted at the user level, make
certain before troubleshooting that it has been mounted
securely.
 The expanded RAM must be EPSON's original SDRAM-
DIMM.
Table 3-45. Troubleshooting for “ROM Checksum Error (Font)”
Step Action and Question Yes No
Parts below can be the source of this error (Chapter 4 Disassembly and Assembly)
• BOARD ASSY., MAIN (p.299)
• Standard ROM-DIMM
1
Checking the standard ROM-DIMM
1. Check to see if the mounted ROM-DIMM is exactly
as specified and connected properly. (Remove once
and then install again)
♦Does the error still occur?
Go to Step 2
Problem
solved
2
Replace the standard ROM-DIMM
1. Replace the standard ROM-DIMM.
♦Does the error still occur?
Go to Step 3
Replace the
faulty ROM-
DIMM
3
BOARD ASSY., MAIN
1. Replace the BOARD ASSY., MAIN.
♦Does the error still occur?
Go to 3.4.17
Electrical
Noise (p.127)
Problem
solved
Parts Name Spec
BOARD ASSY., MAIN C553MAIN
BOARD ASSY, MEMORY C533PROG